How to file a mechanics lien in Pennsylvania

Step by step

16 steps for a subcontractor in Pennsylvania.

1. 1

   Step 1: Work out first whether the property is publicly owned

   Before you do anything else, and before you spend a dollar preparing a lien.

   Pennsylvania allows no mechanics lien for labor or materials furnished for a purely public purpose — a school, a township building, a municipal authority project, a state job. On those jobs your security is the payment bond the prime contractor had to post before the contract was awarded, and your deadline is a completely different one. If this is a public job, skip the lien steps below and go to the two public-works steps at the end.

   Where it goes

   The body that awarded the prime contract. If you ask in writing and swear an affidavit that you furnished labor or materials and have not been paid in full, it must give you a certified copy of the payment bond and the contract.

   How

   Look at who owns the land and who awarded the prime contract — not at who hired you. Your subcontract and the bid documents usually name the contracting body.

   Proof to keep

   A copy of the prime contract or bid documents naming the contracting body, plus the certified copy of the payment bond.

   If you miss it: You file a lien that cannot legally exist, and the 90-day bond notice — the only deadline you actually had — runs out while you wait for it to work.

   49 P.S. § 1303(b) (Mechanics' Lien Law of 1963 § 303(b)); 8 P.S. § 196 (Public Works Contractors' Bond Law of 1967 § 6); 62 Pa.C.S. § 904(opens the statute in a new tab)
2. 2

   Step 2: Search the prothonotary's index for a filed no-lien contract before you start residential work

   Before you sign the subcontract and before you furnish anything. The filing binds you if it was made before work commenced on the ground, or within 10 days after the principal contract was executed, or at least 10 days before your own subcontract.

   On residential property only, a no-lien clause still works in Pennsylvania. If the general contractor signed a contract with the owner, or a separate written instrument, saying no claim shall be filed by anyone, and it was filed with the prothonotary in time, it binds subcontractors who never signed anything and never saw it. On non-residential work the opposite is true: a waiver given before payment is against public policy and void — except that a subcontractor's waiver is valid if the contractor posted a bond guaranteeing payment for labor and materials. This is a check, not a filing.

   Where it goes

   Prothonotary of the Court of Common Pleas for the county where the property is. Find your county court at https://www.pacourts.us/courts/courts-of-common-pleas/

   How

   Search the prothonotary's index in the county where the property is. It is indexed in the contractor's name as defendant and the owner as plaintiff, and also the other way round — search both. Counties that index electronically may use either direction. Also read your own contract for a waiver clause.

   Proof to keep

   A dated printout of your index search and your fully signed contract.

   If you miss it: On residential work you can do every other step perfectly and still have no lien, because a document you never signed took the right away before you started.

   49 P.S. §§ 1401, 1402 (§§ 401, 402); 'residential property' defined at 49 P.S. § 1201(14)(opens the statute in a new tab)
3. 3

   Step 3: Check the State Construction Notices Directory when you start a job worth $1.5 million or more

   As soon as you are awarded the work, and in any case before day 45 of furnishing.

   On a project costing at least $1,500,000 — a 'searchable project' — the owner MAY file a Notice of Commencement in the state directory. If the owner filed one and posted it at the site, every subcontractor must file a Notice of Furnishing within 45 days or forfeit lien rights entirely. The owner's filing is optional and nothing is sent to you, so the only way to know this duty switched on is to go and look.

   Where it goes

   Pennsylvania State Construction Notices Directory, run by the Department of General Services: https://www.pa.gov/dgs/state-construction-notices-directory/search

   How

   Search the directory online by notice ID, project name, project owner, property address or county. Also walk the site: the owner must conspicuously post a copy of the Notice of Commencement, carrying its unique ID number, before physical work starts, and must repost it within 48 hours of learning it is down. And read your contract — a searchable-project contract is required to carry a written warning that failing to file a Notice of Furnishing may forfeit your lien.

   Proof to keep

   A dated printout or screenshot of your directory search, the Notice of Commencement number if there is one, and a photo of the notice posted at the site.

   If you miss it: If a Notice of Commencement was filed and posted and you never looked, you will not file the Notice of Furnishing, and you forfeit the right to file a lien claim.

   49 P.S. §§ 1501.1, 1501.2, 1501.3(a), 1201(17), 1201(18), 1201(19), 1201(20)(opens the statute in a new tab)
4. 4

   Step 4: File the Notice of Furnishing within 45 days of your first day

   Within 45 days after you first perform work or services at the job site, or first provide materials to the job site. Counted from your FIRST day, not your last.

   A filing in the state directory telling the owner you are on the job. It is required only where a Notice of Commencement was filed and posted for a searchable project ($1.5 million or more). It is not a substitute for the 30-day Notice of Intention in the next step — on a searchable project you owe both.

   Where it goes

   Pennsylvania State Construction Notices Directory: https://www.pa.gov/dgs/state-construction-notices-directory

   How

   File it electronically in the State Construction Notices Directory. You create an account first. The statute prints the exact form to use.

   Proof to keep

   Ask the directory for a certified hard copy of your electronic receipt — it shows the date, time and content of your filing. Then use the directory's verification process to confirm your filing is properly indexed and linked to the right Notice of Commencement.

   What the document must contain

   • A general description of the labor or materials you furnished
   • Your full name and address
   • Full name and address of the party that contracted for your work or materials
   • A description sufficient to identify the searchable project, based on the description in the Notice of Commencement
   • The Notice of Commencement number
   • The date your labor, work or materials were or will be first furnished
   • The name and capacity of the person signing for the claimant, and that person's address, and the date

   If you miss it: You forfeit the right to file a lien claim. Not late — gone. One narrow exception: if you can prove the owner, the owner's agent, the contractor or another subcontractor suggested, requested, encouraged or required that you not file, and that is what caused your failure, you keep your lien rights; that conduct is also a second-degree misdemeanor and gives you a civil claim for actual damages, attorney fees and costs.

   49 P.S. § 1501.3(b), (c); § 1501.1(e)(3), (5); § 1501.6(opens the statute in a new tab)
5. 5

   Step 5: Pin down your own last day — every clock in Pennsylvania runs from it

   The day you finish. Write it down that day.

   Pennsylvania counts from the last of the labor you performed or the last of the materials you delivered that YOUR OWN contract required, whichever happened last. Not the day the building was finished. Not the day the owner accepted it. Not the day the job was abandoned. If, through no fault of yours, the improvement is never completed, you still have the right to a lien — except where it was destroyed by fire or other casualty.

   Where it goes

   Your own records.

   How

   If you furnished continuously on one improvement under more than one contract, you may elect to file a single claim for the whole debt — and then completion is not treated as having occurred under any of those contracts until it has occurred under all of them. That election is what lets an open-account supplier run the clock from its last delivery. If instead you worked on several separate improvements that are not part of one business or residential plant, you must file separate apportioned claims; each one may be under $500 as long as the total debt exceeds $500.

   Proof to keep

   Delivery tickets, signed daily field reports, dated site photos, the final invoice — anything that fixes the date from outside your own say-so.

   If you miss it: Counting from the wrong date is how on-time contractors file late. There is no cure for a late filing.

   49 P.S. § 1201(8) ('completion of the work'); § 1305; § 1306(a), (b)(opens the statute in a new tab)
6. 6

   Step 6: Serve the formal Notice of Intention at least 30 days BEFORE you file

   At least 30 days before you file the lien claim. Because the claim itself must be filed within six months of your last day, serve this no later than about five months after your last day. Leave yourself margin.

   A written notice to the owner that you intend to file a claim. Without it, a subcontractor's lien claim is simply not valid. Read the timing carefully: this is a head start you must give the owner, not a deadline that runs from your work. It is excused in one situation only — where you are filing in response to a rule to file claim.

   Where it goes

   The owner of the property, or the owner's agent.

   How

   First class, registered or certified mail on the owner or the owner's agent. Or have an adult serve it the same way a writ of summons in assumpsit is served. If neither can be done, post it on a conspicuous public part of the improvement. Mail IS allowed here — this is the one notice where it is, and the next one is different.

   Proof to keep

   The certified mail receipt and return card, a copy of exactly what you sent, and the date you sent it. You have to state that date on the lien claim itself.

   What the document must contain

   • Your name as claimant
   • The name of the person you contracted with
   • The amount claimed to be due
   • The general nature and character of the labor or materials you furnished
   • The date of completion of the work your claim is for
   • A brief description sufficient to identify the property claimed to be subject to the lien

   If you miss it: Your lien claim is invalid. And if you serve it too late in the six months, you are boxed in — you cannot file until 30 days have run, and by then the six-month window may have closed.

   49 P.S. § 1501(b.1), (c), (d)(opens the statute in a new tab)
7. 7

   Step 7: If a rule to file claim is entered against you, file within 30 days

   Within 30 days after notice of the rule.

   This is the lever the other side can pull. Once your work is complete, the owner OR the contractor may go to the court at any time and enter a rule, as of course, requiring you to file your claim within 30 days after notice of the rule or be forever barred. It collapses your six months to 30 days whenever they choose, and it applies only to subcontractors. Nothing warns you it is coming.

   Where it goes

   The prothonotary where the rule was entered. The rule is placed on the judgment index and in the mechanics' lien docket, so it will also show up if you check your own name there.

   How

   File the lien claim with the prothonotary. It is entered under the same court, term and number as the rule. You do NOT have to give the 30-day Notice of Intention first when you are filing under a rule — that is the one carve-out from the previous step.

   Proof to keep

   The notice of the rule and the date you received it, plus your time-stamped claim.

   If you miss it: Failure to file within the time specified operates to wholly defeat your right to file. There is no extension.

   49 P.S. § 1506(a)(opens the statute in a new tab)
8. 8

   Step 8: File the lien claim with the county prothonotary within six months

   Within six (6) months after completion of YOUR work. That is six calendar months, not 180 days: count from your last day to the same numbered day six months later, and if that month is short, the period ends on the last day of that month. If the final day falls on a Saturday, Sunday or a legal holiday it is left out of the count. Safest habit is to file by the earlier of 180 days and the six-month date, and not to rely on the weekend rule.

   This is the lien. The window is identical for general contractors and subcontractors — Pennsylvania gives nobody a longer runway. The amount claimed must exceed $500.

   Where it goes

   Prothonotary of the Court of Common Pleas for the county where the improvement is situated. Some counties use a different name for the office — in Philadelphia the civil filing office is the Office of Judicial Records. Find your county court at https://www.pacourts.us/courts/courts-of-common-pleas/

   How

   File with the prothonotary however that county accepts civil filings. Neither the Act nor the Rules of Civil Procedure require the claim itself to be notarized or verified — Section 503 lists contents only — but a signed verification is harmless and matches common county practice. The filing fee is set county by county, not by the Mechanics' Lien Law; call the office and ask before you go. If the improvement sits in more than one county you may file in any or all of them, but a claim filed in one county reaches only the part of the property in that county.

   Proof to keep

   A time-stamped copy showing the court, the term and number, and the date of filing. You need all of those to write the notice of filing in the next step.

   What the document must contain

   • Your name as claimant, and whether you file as contractor or as subcontractor
   • The name and address of the owner or reputed owner
   • The date of completion of your work
   • If you file as a subcontractor: the name of the person you contracted with, and the dates on which preliminary notice (if required) and formal notice of intention to file a claim were given
   • If you file as a contractor under a contract for an agreed sum: an identification of the contract and a general statement of the kind and character of the labor or materials furnished
   • In every other case: a detailed statement of the kind and character of the labor or materials furnished, and the prices charged for each
   • The amount or sum claimed to be due
   • A description of the improvement, and of the property claimed to be subject to the lien, reasonably necessary to identify them

   If you miss it: No lien. And once the six months has run, the claim cannot be amended to substitute a different property, substitute a different party you contracted with, or increase the aggregate amount. Get it right the first time.

   49 P.S. § 1502(a)(1), (b); § 1503; § 1504; § 1301(a); § 1201(13); time computed under 1 Pa.C.S. §§ 1908, 1910(opens the statute in a new tab)
9. 9

   Step 9: Serve written notice of the filing on the owner within one month — by hand, not by mail

   Within one (1) month after filing.

   Filing is not the end. You now have to tell the owner in writing that the claim has been filed. This is a DIFFERENT notice from the Notice of Intention, with a different service rule, and mixing the two up is the single most common way a perfected Pennsylvania lien gets struck.

   Where it goes

   The owner.

   How

   Service must be made BY AN ADULT in the same manner as a writ of summons in assumpsit — hand delivery, commonly by the county sheriff or a competent adult server. Only if service cannot be made that way may you post it on a conspicuous public part of the improvement. Section 502(c) lists no mail option at all, while Section 501(d) expressly allows mail for the earlier Notice of Intention. Do not mail this one.

   Proof to keep

   The sheriff's return of service, or the server's affidavit setting out the date and manner of service. You file that in the next step.

   What the document must contain

   • The court
   • The term and number of the claim
   • The date the claim was filed

   If you miss it: Failure to serve this notice within the month is sufficient ground for striking off the claim.

   49 P.S. § 1502(a)(2), (c); cf. § 1501(d)(opens the statute in a new tab)
10. 10

    Step 10: File the affidavit of service within 20 days after you serve

    Within 20 days after service.

    A sworn affidavit of service, or the owner's written acceptance of service, filed with the court. This is a second, independent forfeiture point that fires after you already have the lien, and it is where a large share of otherwise-good Pennsylvania liens die.

    Where it goes

    Prothonotary of the Court of Common Pleas where the claim is filed.

    How

    File it with the prothonotary under the same docket number as the claim. The affidavit is sworn, so this document does get notarized — even though the claim itself does not have to be.

    Proof to keep

    A time-stamped copy of the filed affidavit or acceptance of service.

    What the document must contain

    • The date of service
    • The manner of service

    If you miss it: Failure to file the affidavit or acceptance within 20 days is sufficient ground for striking off the claim, and the defect does not go stale. In Terra Firma Builders, LLC v. King, 249 A.3d 976 (Pa. 2021), the Pennsylvania Supreme Court held an unperfected lien may be stricken at any time and that the owner had not waived the objection by raising it more than five years after the claim was filed.

    49 P.S. § 1502(a)(2); § 1505(opens the statute in a new tab)
11. 11

    Step 11: Start the lawsuit within two years of the filing date

    Within two (2) years from the DATE OF FILING of the claim, unless the owner extends the time in writing.

    The lien by itself does not get you paid. You have to sue on it and reduce it to judgment. Two years is the same for every claimant — Pennsylvania has no short subcontractor enforcement window.

    Where it goes

    The Court of Common Pleas in the county where the claim was filed — and only that county. If claims were filed in several counties, you may bring the action in any of them.

    How

    File a complaint with the prothonotary under the same docket number as the lien claim, and attach a copy of the claim as an exhibit. No other cause of action may be joined with it, except that where the improvement is in more than one county and claims were filed in more than one, you may join those claims in a single action. The owner may plead a set-off arising from the same transaction, but may not counterclaim. The rules are at 231 Pa. Code Ch. 1650: https://www.pacodeandbulletin.gov/Display/pacode?file=/secure/pacode/data/231/chapter1650/chap1650toc.html

    Proof to keep

    Time-stamped complaint and proof of service of the complaint. Name as defendant the owner named in the claim and, if different, the owner at the time you commence the action.

    What the document must contain

    • The name and address of each party to the action, and, if a subcontractor brings the action, the name and address of the contractor
    • The date the claim was filed
    • A demand for judgment
    • A copy of the claim, attached as an exhibit

    If you miss it: The lien dies.

    49 P.S. § 1701(b), (c), (e); Pa.R.C.P. Nos. 1652, 1653, 1654, 1656, 1657, 1658 (231 Pa. Code Ch. 1650)(opens the statute in a new tab)
12. 12

    Step 12: If the owner enters a rule to file a complaint, you have 20 days

    Within 20 days after service of the rule.

    The second lever the other side can pull, and the one almost nobody sees coming. Once your claim is on file and you have not yet sued, the owner may go to the prothonotary on a praecipe and get a rule, as of course, ordering you to file your complaint within 20 days of service of the rule or be forever barred. Your two years becomes 20 days at the owner's choosing. This one applies to general contractors as well as subcontractors.

    Where it goes

    The prothonotary where the claim is filed.

    How

    File the complaint as in the previous step.

    Proof to keep

    The rule and the date it was served on you, plus your time-stamped complaint.

    If you miss it: You are forever barred from filing the complaint, and on the owner's praecipe and proof of service the prothonotary enters judgment for the defendant.

    Pa.R.C.P. No. 1659 (231 Pa. Code Rule 1659)(opens the statute in a new tab)
13. 13

    Step 13: Get to a verdict or judgment within five years of the filing date

    A verdict must be recovered or judgment entered within five (5) years from the date the claim was filed, and final judgment must be entered on a verdict within five years.

    An outer limit stacked on top of the two-year suit deadline. Suing on time is not enough; the case has to finish.

    Where it goes

    The Court of Common Pleas where the action is pending.

    How

    Keep the case moving. Once a complaint has been filed and the case is at issue, time consumed in presenting and disposing of motions and petitions by defendants, substituted defendants and intervenors, and time consumed on appeals from the perfection of the appeal to the return of the certiorari, is excluded from the five years.

    Proof to keep

    Docket entries showing every excluded period, so you can prove the clock stopped when you say it did.

    If you miss it: The claim shall be wholly lost.

    49 P.S. § 1701(d)(opens the statute in a new tab)
14. 14

    Step 14: Enter satisfaction on the record once you are paid

    On payment, satisfaction or other discharge of the claim, verdict or judgment. If you receive a written request to satisfy, you have 30 days.

    Clearing the record is your duty, not the owner's. It is the last thing on the list and the easiest to forget after the money lands.

    Where it goes

    Prothonotary of the Court of Common Pleas where the claim is filed.

    How

    Enter satisfaction on the record, paying the costs of doing so.

    Proof to keep

    A time-stamped copy of the satisfaction entry.

    If you miss it: If you do not satisfy within 30 days of a written request, the court may on any interested party's petition order it satisfied and impose a penalty on you in favor of the aggrieved party, in whatever sum the court thinks just, up to the amount of the claim.

    49 P.S. § 1704(opens the statute in a new tab)
15. 15

    Step 15: Public job: give the prime contractor written notice within 90 days

    Within 90 days from the date you performed the last of the labor or furnished the last of the materials you claim payment for.

    There is no lien on public property, so the prime's payment bond is your security. If you have a direct contract with a subcontractor of the prime but no contract, express or implied, with the prime itself, you may sue on the bond only if you gave the prime this notice. If you contracted directly with the prime, no notice is required of you. One thing that works better here than on private work: 'labor or materials' on a public bond expressly includes public utility services and reasonable rentals of equipment for the periods the equipment was actually used at the site — rental that is not lienable on a private job is covered here.

    Where it goes

    The prime contractor who gave the payment bond. Get a certified copy of the bond and the contract from the contracting body first — it must furnish one if you apply and submit an affidavit that you furnished labor or materials for the work and have not been fully paid.

    How

    Registered or certified mail, postage prepaid, in an envelope addressed to the prime at any place where its office is regularly maintained for the transaction of business; or served in any manner in which legal process may be served for a summons, except that the server need not be a public officer. On a Commonwealth purchasing agency contract the Procurement Code says registered mail or service in the manner of a summons — use registered or certified mail and keep the receipt either way.

    Proof to keep

    The registered or certified mail receipt and return card, plus a copy of exactly what you sent and the date.

    What the document must contain

    • The amount claimed, stated with substantial accuracy
    • The name of the person for whom the work was performed or to whom the material was furnished

    If you miss it: You cannot bring an action on the payment bond or other financial security at all.

    8 P.S. § 194(b) (Public Works Contractors' Bond Law of 1967 § 4(b)); for Commonwealth agency contracts 62 Pa.C.S. § 903(d)(2), (3); no lien on public property: 49 P.S. § 1303(b)(opens the statute in a new tab)
16. 16

    Step 16: Public job: sue on the payment bond once 90 days have passed

    You may bring the action once 90 days have passed since the day you performed the last of the labor or furnished the last of the materials. Read that carefully: the 90 days is a WAITING period before suit is allowed, not a deadline to sue by.

    An action in your own name, in assumpsit, on the payment bond or other financial security, which you may prosecute to final judgment and execute on. Which bond statute applies depends on who awarded the prime contract. Generally, a payment bond at 100% of the contract amount is required before any contract exceeding $5,000 is awarded. But for a county, school district, intermediate unit, area vocational-technical school, city, borough, incorporated town, township, home-rule municipality or a Municipality Authorities Act of 1945 authority, the threshold is a contract exceeding $10,000 and that section supersedes the $5,000 rule; those bodies may accept a bond, an irrevocable letter of credit, or a restrictive or escrow account. For Commonwealth purchasing agencies the 1967 Act was repealed and the Procurement Code governs: contract performance security for construction contracts between $25,000 and $100,000, and 100% performance and payment bonds above $100,000, with those dollar figures adjusted annually for the Composite Construction Cost Index.

    Where it goes

    Court. The contracting body holds the bond on file and must furnish you a certified copy on application and affidavit.

    How

    An action in assumpsit in your own name. Pull the certified copy of the bond before you draft anything — the bond's own terms matter.

    Proof to keep

    The certified copy of the bond and the prime contract; your 90-day notice and its mailing proof if you owed one.

    If you miss it: Neither the 1967 Act nor the Procurement Code sets an outside deadline for suing on the bond — Section 7 of the 1967 Act, which once carried limitations language, was repealed on Apr. 28, 1978, P.L.202, No.53. What controls instead is the bond's own suit-limitation clause and Pennsylvania's general limitations periods, including the four-year limit on an action upon a bond or upon a contract or liability founded on a writing. Do not assume you have years. Read the bond and take it to a lawyer.

    8 P.S. § 194(a) (§ 4(a)); 8 P.S. §§ 193(a), 193.1(a),(d),(e), 196 (§§ 3(a), 3.1, 6); 62 Pa.C.S. §§ 903(a),(d)(1),(e), 904; 42 Pa.C.S. § 5525(a)(7),(8)(opens the statute in a new tab)

Who can claim a lien in Pennsylvania

Where you file

Office

Prothonotary of the Court of Common Pleas of the county in which the improvement is situated (styled Office of Judicial Records in Philadelphia, Department of Court Records — Civil/Family Division in Allegheny County, and Clerk of Judicial Records in some other counties). Where the improvement lies in more than one county the claim may be filed in any one or more of them, but is effective only as to the part of the property in the county where filed (49 P.S. § 1502(b)).

Recording fee

$45–$150

Notarization

Not required

How it is served

Personal service by adult

Copies

2

Fees and office procedures change; confirm them with the recording office before you file.

What trips people up in Pennsylvania

• Thinking the job is done when the lien is filed. It is not. You must serve the owner within one month and file an affidavit or acceptance of service within 20 days after that service. Failure on either is sufficient ground for striking the claim (49 P.S. § 1502(a)(2)). More perfected Pennsylvania liens die here than at any deadline.
• Serving the notice of filing by certified mail. The two notices have two different service rules. Certified mail is expressly allowed for the pre-lien Notice of Intention (49 P.S. § 1501(d)); Section 502(c) lists no mail option for the notice of filing and requires service by an adult in the manner of a writ of summons, or posting on the improvement if that cannot be done. Contractors mail the second one because they mailed the first one.
• Treating the 30-day Notice of Intention as a window that runs from your last day of work. It is a lead time you give BEFORE you file (49 P.S. § 1501(b.1)). A subcontractor who first thinks about the lien at month five and a half cannot file at all, because 30 days must pass before filing and the six months will be gone.
• Waiting for the owner to tell you about the Notice of Commencement. On a project costing $1.5 million or more, the owner MAY file one; if the owner did, and posted it, a subcontractor who does not file a Notice of Furnishing within 45 days of first furnishing forfeits lien rights entirely (49 P.S. §§ 1501.3(b), (c)). Because the owner's filing is optional and unannounced, the only safe habit is to search the directory at the start of every job that size.
• Counting 180 days instead of six calendar months, or counting from project completion. The window is six months from completion of YOUR work, which means the last labor or last materials your own contract required (49 P.S. §§ 1502(a)(1), 1201(8)), computed under 1 Pa.C.S. §§ 1908 and 1910.
• Going back for punch list, warranty or corrective work and believing the clock restarted. It does not — 'completion of the work' is tied to what the contract required, not to the last time you were on site.
• Assuming the chain of lien rights runs all the way down. It stops at the second tier. A person who contracts with a materialman, or with a subcontractor who is not in direct privity with the contractor, is not a 'subcontractor' and has no lien at all (49 P.S. §§ 1201(5), 1303(a)). Serving perfect notices does not create a right that never existed.
• Renting equipment and expecting a lien. 'Materials' means fixtures, machinery and equipment reasonably necessary to AND incorporated into the improvement (49 P.S. § 1201(7)); R.A. Greig Equipment Co. v. Mark Erie Hospitality, LLC, 2023 PA Super 206 (Oct. 19, 2023) struck a lien for a rented telehandler and its rental charges. HB 1319 would change this but had not been enacted as of 17 September 2026. On a PUBLIC job the payment bond does cover reasonable equipment rentals for the periods actually used at the site.
• Design professionals assuming a contract is enough. An architect or engineer has lien rights only if hired by the OWNER and only if, beyond drawings, specifications and contract documents, they also superintend or supervise the work (49 P.S. § 1201(4)). One hired by a contractor or subcontractor is expressly excluded (§ 1201(5)).
• Suing the house when the homeowner already paid. A subcontractor has no lien on an improvement to residential property where the owner or tenant paid the contractor the full contract price, the property is or is intended to be the residence of the owner or the owner's tenant, and it is a single townhouse or a building of one or two dwelling units (49 P.S. § 1301(b)). If the owner paid in part, the claim is reduced on petition to the unpaid contract balance (§ 1510(f)). Your remedy runs against the contractor, not the house.
• Not checking the prothonotary for a filed no-lien contract before starting residential work. On residential property a no-lien contract signed by the general contractor and filed in time binds subcontractors who never signed anything (49 P.S. §§ 1401(a), 1402). On non-residential work such a waiver is void unless given for payment actually received, or, for a subcontractor, unless the contractor posted a labor-and-materials payment bond (§ 1401(b)).
• Tenant fit-out work. No lien attaches to the fee owner's estate just because the owner consented to the tenant improving the premises — it takes a writing signed by the owner stating the work was in fact for the owner's immediate use and benefit (49 P.S. § 1303(d)).
• Sitting on an alteration or repair claim while the property is for sale. If the property is conveyed in good faith for valuable consideration before you file, an alteration or repair lien is wholly lost (49 P.S. § 1303(c)) — because such liens take priority only from the date of filing (§ 1508(b)). Erection and construction liens relate back to the visible commencement of work on the ground (§ 1508(a)) and survive a sale.
• Filing a lien on a public job. No lien is allowed for labor or materials furnished for a purely public purpose (49 P.S. § 1303(b)). The claimant who files one has burned the only window they had: the real step is written notice to the prime within 90 days of last furnishing (8 P.S. § 194(b); 62 Pa.C.S. § 903(d)(2)).
• Filing a claim of exactly $500. It must EXCEED $500 (49 P.S. § 1301(a)). The only exception is an apportioned claim across several separate improvements, where each may be smaller as long as the total debt exceeds $500 (§ 1306(b)).
• Expecting a Notice of Completion to change your deadline. Contractors arriving from states where a recorded notice of completion shortens the filing window assume Pennsylvania works the same way. It does not: a Notice of Completion 'shall not be considered by a court in determining compliance with timing requirements under this act or in determining the completion date for a timing purpose,' and its filing is purely precatory (49 P.S. § 1501.4(c), (d)).
• Planning to fix the claim later. After the filing period expires, no amendment may substitute a different property, substitute a different party you contracted with, or increase the aggregate amount (49 P.S. § 1504).
• Ignoring a rule. An owner or contractor can enter a rule to file claim compelling a subcontractor to file within 30 days or be forever barred (49 P.S. § 1506(a)); and after the claim is filed, an owner can get a rule, as of course, compelling any claimant to file the complaint within 20 days or be forever barred, with judgment then entered for the defendant (Pa.R.C.P. No. 1659). Neither can be predicted from a calendar.
• Assuming a perfected lien is worth the money. Every lien obtained under the Act is subordinate to a purchase-money mortgage and to an open-end mortgage where at least 60% of the proceeds are intended to pay or are used to pay costs of construction (49 P.S. § 1508(c)). On a heavily financed project a perfect lien can be worth nothing.
• Taking a security interest in the materials you supplied. No lien is allowed for the portion of a debt representing the contract price of materials against which you hold or have claimed a UCC security interest, or to which you reserved title or the right to reacquire title (49 P.S. § 1303(e)).
• Looking for a stop notice. Pennsylvania has none for claimants. What exists is an OWNER remedy: once served with a subcontractor's notice of intention or notice of filing, the owner may retain money otherwise due to the contractor (49 P.S. § 1601). That is why serving the notice of intention is what actually moves money — it puts the owner on the hook to hold funds back.

After you file

• Within one month of filing, serve written notice of the filing on the owner, by an adult in the manner of a writ of summons in assumpsit — or by posting on a conspicuous public part of the improvement only if service cannot be made that way. Then file the affidavit or acceptance of service within 20 days after that service. Failure on either is sufficient ground for striking off the claim (49 P.S. § 1502(a)(2), (c)). These two together are Pennsylvania's second forfeiture point and they fire after you already have the lien.
• The prothonotary enters your claim on the judgment index and in the mechanics' lien docket against the owner, and notes it there if it is later stricken, reversed, satisfied or discontinued (49 P.S. § 1507).
• Serving the owner starts a chain in your favour. An owner served with a subcontractor's notice of intention or notice of filing may retain out of money due to the contractor a sum sufficient to protect the owner from loss (49 P.S. § 1601); if the owner does retain funds, the owner must give the contractor written notice (§ 1602); the contractor then has 30 days from receipt to settle and produce a signed waiver or release, agree in writing to defend and post extra security if the owner is short, or furnish approved security (§ 1603). If the contractor does none of those, the owner may pay your claim and be subrogated to your rights against the contractor, or defend at the contractor's cost (§ 1604).
• The owner can take the lien off the property without paying you. Depositing with the court a sum equal to your claim, or entering approved security in double the required deposit (or a lesser amount the court approves, never less than the full deposit), discharges the claim as a lien against the property. Your claim survives against the fund; the building goes free (49 P.S. § 1510(a), (d), (e)).
• On residential property subject to 49 P.S. § 1301(b), the owner or an interested party may petition to have a subcontractor's claim discharged entirely where the owner or tenant paid the contractor in full, or reduced to the unpaid contract balance where they paid in part (49 P.S. § 1510(f)).
• Any party may preliminarily object to the claim on a showing that the property is exempt or immune, or for lack of conformity with the Act; the court decides the objections and may take evidence. Failing to object preliminarily does not waive the right to raise the same point as a defense later (49 P.S. § 1505). This is why an unperfected lien stays vulnerable for years.
• An owner can force the lawsuit. On the owner's praecipe the prothonotary enters a rule, as of course, requiring you to file a complaint within 20 days after service of the rule or be forever barred; if you do not, judgment is entered for the defendant on the owner's praecipe and proof of service (Pa.R.C.P. No. 1659).
• Commence the action within two years of the date you filed the claim, unless the owner extends it in writing (49 P.S. § 1701(b)). File the complaint with the prothonotary under the same docket number as the claim, in the county where the claim was filed, with a copy of the claim attached as an exhibit (Pa.R.C.P. Nos. 1652, 1653, 1656). No other cause of action may be joined (Rule 1657). A set-off from the same transaction may be pleaded as new matter, but no counterclaim (Rule 1658; 49 P.S. § 1701(e)). Non-jury trials follow Rule 1038 (Rule 1661) and judgment is enforced under Rule 3190 (Rule 1660).
• Get to a verdict or judgment within five years of the date of filing, and final judgment on a verdict within five years, or the claim is wholly lost (49 P.S. § 1701(d)). Time consumed on defendants' and intervenors' motions and petitions, and on appeals, is excluded once a complaint has been filed and the case is at issue.
• Filing the claim does not take away your ordinary right to collect the debt in any other way — you can still sue on the contract (49 P.S. § 1702).
• When you are paid, enter satisfaction on the record. If you do not do it within 30 days of a written request, the court may order it satisfied and impose a penalty on you up to the amount of the claim (49 P.S. § 1704).
• Priority is already fixed and will not improve: an erection or construction lien dates from the visible commencement of work on the ground; an alteration or repair lien dates only from the day you filed; and every lien is subordinate to a purchase-money mortgage and to a qualifying open-end mortgage (49 P.S. § 1508). The lien binds only the interest of the party named as owner at the time of the contract or acquired by that party afterwards, though a later forfeiture or surrender of a leasehold does not prejudice the lien against fixtures and machinery (§ 1509).