How to file a mechanics lien in New Jersey

Step by step

16 steps for a subcontractor in New Jersey.

1. 1

   Step 1: Find your spot in the contracting chain before you spend anything

   Before you sign, and again the moment payment stops.

   New Jersey only gives lien rights two tiers down. If your contract is with a subcontractor who is not directly under the general contractor, or you are a supplier selling to another supplier, you have no lien rights at all in this state. Check this first, because filing a lien you were never entitled to is not just useless — it exposes you to the other side's attorneys' fees.

   Where it goes

   Your own contract file. No filing.

   How

   Write down who signed your contract, and who signed theirs. "Subcontractor" means someone under a contract with the general contractor, or under a contract with a subcontractor who is directly under the general contractor. "Supplier" means someone selling directly to the owner, the community association, the general contractor, or a subcontractor directly under the general contractor.

   Proof to keep

   Your signed contract, plus purchase orders or correspondence showing who hired the party who hired you.

   If you miss it: If you are below the second tier, you have no New Jersey lien rights at all. Filing anyway can make you liable for the owner's court costs, legal expenses and attorneys' fees under N.J.S.A. 2A:44A-15.

   N.J.S.A. 2A:44A-2 (definitions of "contractor," "subcontractor," "supplier")(opens the statute in a new tab)
2. 2

   Step 2: Confirm the job is private, not public

   Before you do anything else.

   No construction lien can attach to public works contracted for and awarded by a public entity — a school, a municipal building, a county or state job. A different statute, the Municipal Mechanics' Lien Law, covers those, and it is filed with the public agency, not the County Clerk.

   Where it goes

   Not the County Clerk. Under N.J.S.A. 2A:44-132 a public-job notice of lien claim goes to the chairman or other head officer, or the secretary or clerk, of the public agency.

   How

   Ask who owns the property and who awarded the contract. If the answer is a board of education, a municipality, a county, an authority or the State, you are on the public track.

   Proof to keep

   The contract or bid documents naming the awarding public entity.

   If you miss it: You record a document with no legal effect against a public project, and while you are doing that you may blow the separate Municipal Mechanics' Lien and payment-bond deadlines, which have their own timing. Federal projects have no lien of any kind either.

   N.J.S.A. 2A:44A-5(b); public-job filing under N.J.S.A. 2A:44-125 et seq. and 2A:44-132(opens the statute in a new tab)
3. 3

   Step 3: Decide whether this is a "residential construction contract"

   Before you count a single day.

   This is the fork in the road, and it is defined by statute, not by whether people live there. A "dwelling" is a one-, two- or three-family residence, freestanding or sharing a party wall that nobody co-owns. A "residential unit" is a unit in a development designed to be sold as a residence, where that design is recorded in something like a master deed. If your job is either of those, you are on the residential track. A four-family or larger apartment building held as rental property is neither, so it runs the ordinary 90-day track.

   Where it goes

   No filing. This decision drives every deadline that follows.

   How

   Read your contract against the two statutory tests: is the improvement to a one-, two- or three-family residence, or to a unit in a recorded residential development? If you cannot tell, treat it as residential.

   Proof to keep

   The contract, the property record showing a master deed or declaration if there is one, and a note of how you classified it and why.

   If you miss it: Calling a residential job "commercial" means you skip the 60-day Notice of Unpaid Balance and the arbitration, and no lien attaches at all — N.J.S.A. 2A:44A-5(c) requires strict compliance. Calling a commercial job "residential" only costs you wasted effort and a shorter working window. That is why the safe guess is residential.

   N.J.S.A. 2A:44A-2 (definitions of "dwelling," "residential construction contract," "residential unit"); consequence at N.J.S.A. 2A:44A-5(c)(opens the statute in a new tab)
4. 4

   Step 4: Consider filing a Notice of Unpaid Balance to protect your place in line

   Optional

   Any time, but it stops being effective 90 days after your last day of work on a non-residential job (120 days on a residential one).

   On a non-residential job nothing requires you to file this. It is a priority tool. Your lien only attaches from the day you file it, and it never beats a mortgage, judgment or interest recorded first. Recording a Notice of Unpaid Balance stakes your claim earlier, so a sale, lease or mortgage recorded after it cannot jump ahead of you. Worth doing on a job where the owner may sell or refinance.

   Where it goes

   County Clerk of the county where the property is located.

   How

   Record it with the County Clerk. You do not have to serve it on anyone on a non-residential job.

   Proof to keep

   The Clerk's stamped copy showing the date and time received.

   What the document must contain

   • The form set out in N.J.S.A. 2A:44A-20

   If you miss it: Nothing, as far as your right to file the lien goes — failure to file it does not affect your lien rights, as long as no conveyance, lease or mortgage happens before you file your Notice or your lien claim. If one does happen first, you lose priority to it. Filing this Notice also does not extend your deadline to file the lien claim.

   N.J.S.A. 2A:44A-20; priority rules at N.J.S.A. 2A:44A-10 and 2A:44A-22(opens the statute in a new tab)
5. 5

   Step 5: Pin down your real last day on the job

   As soon as you stop working or payment stops.

   Every deadline in New Jersey runs from the last day you provided work, services, material or equipment — your own last day, not the day the project finished, not your invoice date, not the last payment. And going back later does not reset it. Warranty calls, service calls and anything you do after your contract is complete or terminated cannot be used to set that date.

   Where it goes

   Your own records. Nothing is filed.

   How

   Pull your daily reports, delivery tickets and time records and identify the last date of actual contract work. Mark any later visit separately as a warranty or service call.

   Proof to keep

   Dated delivery tickets, signed field reports, timesheets or photos fixing that last date, and separate records for any callback visits.

   If you miss it: You count from the wrong day. Contractors routinely believe a punch-list visit buys another 90 days. It does not, and that belief is what makes people file on day 150 and lose everything.

   N.J.S.A. 2A:44A-6(d)(opens the statute in a new tab)
6. 6

   Step 6: Residential jobs: record the Notice of Unpaid Balance within 60 days

   Within 60 days after your own last day of work on the job.

   On a residential construction contract this is a condition precedent — no Notice, no lien, ever. It applies to every claimant, including a general contractor who signed directly with the homeowner. There is no exception for being in privity with the owner, and there is no dollar threshold anywhere in this law.

   Where it goes

   County Clerk of the county where the property is located.

   How

   Lodge it for record with the County Clerk. "Lodged for record" means the Clerk actually received it — mailing it on day 60 is not filing it on day 60.

   Proof to keep

   The Clerk's stamped copy showing the date and time received. You will need this for the arbitration.

   What the document must contain

   • The Notice of Unpaid Balance and Right to File Lien form set out in N.J.S.A. 2A:44A-20

   If you miss it: No lien attaches and you cannot file one. N.J.S.A. 2A:44A-5(c) requires strict compliance with sections 20 and 21, and this is the first requirement.

   N.J.S.A. 2A:44A-21(b)(1); N.J.S.A. 2A:44A-5(c)(opens the statute in a new tab)
7. 7

   Step 7: Residential jobs: serve the Notice of Unpaid Balance

   Upon lodging it for record.

   Recording it is not enough on a residential job. Once it is lodged for record it must be served the same way a lien claim is served.

   Where it goes

   The owner or community association, and the contractor and any subcontractor against whom you are asserting the claim.

   How

   Either personal service under the New Jersey Rules of Court, or registered mail, certified mail or a commercial courier sent at the same time as an ordinary mailing to the last known business or residence address.

   Proof to keep

   Return receipts, courier tracking, the certificate of mailing for the ordinary mail, and a copy of exactly what you sent to whom.

   If you miss it: You have not strictly complied with section 21, and N.J.S.A. 2A:44A-5(c) bars the lien.

   N.J.S.A. 2A:44A-21(b)(2), which applies the service rules of N.J.S.A. 2A:44A-7(opens the statute in a new tab)
8. 8

   Step 8: Residential jobs: demand arbitration within 10 days of recording the Notice

   Within 10 days from the date the Notice of Unpaid Balance was lodged for record.

   New Jersey makes residential claimants prove up the claim in a fast American Arbitration Association proceeding before they may file a lien. The arbitrator decides whether your Notice was proper and served, how much of the contract was earned, whether a lien may be filed and for how much, and how any setoffs and counterclaims come out.

   Where it goes

   The American Arbitration Association, plus service on the other parties.

   How

   Serve a demand for arbitration and satisfy all of the American Arbitration Association's requirements for the proceeding. Expect to supply a signed copy of the Notice and proof that it was lodged.

   Proof to keep

   The dated demand, proof of service, the AAA's acknowledgment of receipt, and everything you filed with it.

   If you miss it: You have not strictly complied with section 21, so no lien attaches. Note also that the arbitrator has to act within 30 days of the AAA receiving your demand, and if no response is filed the proceeding is treated as finished 7 days after the response time runs out — so this moves fast.

   N.J.S.A. 2A:44A-21(b)(3)(opens the statute in a new tab)
9. 9

   Step 9: Residential jobs: post security if the arbitrator orders it

   As ordered — and the 10-day window to file your lien keeps running while you try to get it.

   If the owner raises setoffs or counterclaims that cannot be pinned to a number, the arbitrator can order you to post a bond, a letter of credit or funds before you are allowed to file the lien. The amount is set at 110% of what the arbitrator estimates those setoffs to be.

   Where it goes

   As directed in the arbitrator's determination.

   How

   Obtain the bond, letter of credit or funds in the amount and form the arbitrator directs.

   Proof to keep

   The bond or letter of credit itself and proof of when you furnished it.

   If you miss it: Failing to furnish the bond, letter of credit or funds within the 10-day period makes the lien claim invalid — the same consequence as filing late.

   N.J.S.A. 2A:44A-21(b)(5), (b)(8)(opens the statute in a new tab)
10. 10

    Step 10: Build the lien claim form correctly — sworn and notarized

    Before you go to the Clerk, with enough time left to fix a rejection.

    The lien claim has to be signed, acknowledged and verified by your oath. It is a statutory form with required contents. A claim that is not in substantially the required form is not just rejected — it triggers forfeiture and liability for the other side's fees.

    Where it goes

    Prepared for recording with the County Clerk.

    How

    Complete the statutory form, swear to it, and have it notarized. Do not round up, and do not include amounts you have not earned.

    Proof to keep

    A signed, notarized copy of exactly what you filed.

    What the document must contain

    • Date of the claim
    • Claimant's name, type of entity, and business address
    • Owner's name
    • Property description — block and lot, or metes and bounds — plus municipality and county
    • Amount of the lien claim
    • Date of your contract and the name and address of the party you contracted with
    • Description of the work, services, material or equipment provided
    • The date you last provided work, services, material or equipment
    • The arithmetic: original contract price, change orders and amendments, total contract price, value of work if incomplete, agreed credits, amounts already paid, and the resulting claim
    • Whether the claim arises from a residential construction contract
    • Notice of Unpaid Balance filing details, if one was filed
    • The arbitrator's award details, on a residential job
    • Your sworn representations, including that you are entitled to the amount claimed as of the date of lodging and that the work was provided exclusively in connection with this improvement
    • Notarial acknowledgment

    If you miss it: Under N.J.S.A. 2A:44A-15, a claim that is without basis, willfully overstated, or not lodged in substantially the required form, manner or time means you forfeit all claimed lien rights and the right to file a later lien claim, and you become liable for the other side's court costs, reasonable legal expenses including attorneys' fees, and damages. "Without basis" includes frivolous, false, unsupported by a contract, or made with malice or bad faith.

    N.J.S.A. 2A:44A-6(a)(1); form contents at N.J.S.A. 2A:44A-8; penalties at N.J.S.A. 2A:44A-15(opens the statute in a new tab)
11. 11

    Step 11: Non-residential jobs: record the lien claim within 90 days

    Within 90 days following the date you last provided work, services, material or equipment for which you are claiming payment. Same 90 days for every claimant type.

    On everything that is not a residential construction contract, this is the whole front end of the process. No preliminary notice is required from anyone — general contractor, subcontractor or supplier. You record the lien claim and that is it.

    Where it goes

    County Clerk of the county where the property is located. Expect roughly $15 to $25; Union and Atlantic counties charge $15 per construction lien and Cumberland charges $20, but fees vary by county.

    How

    Lodge the completed, sworn, notarized claim for record with the County Clerk. Ask the clerk for a copy marked with the date and time received — the statute says the clerk shall provide one if requested.

    Proof to keep

    The date- and time-stamped copy from the Clerk, and your receipt.

    If you miss it: You lose the lien. "Lodged for record" means the Clerk received it — mailing on day 90 is not filing on day 90, and a claim bounced for a formatting defect and re-lodged on day 92 is late with no cure.

    N.J.S.A. 2A:44A-6(a)(2)(opens the statute in a new tab)
12. 12

    Step 12: Residential jobs: record the lien claim within 10 days of the arbitrator's determination

    Not later than 10 days after you receive the arbitrator's determination, and in no event later than 120 days following your last day of work. The 120 days is an outer limit, not your working deadline — if you did not record the Notice of Unpaid Balance by day 60, day 120 is meaningless to you.

    On a residential job the filing window opens only after the arbitration ends, and it is short. There is also a hard outer wall you can never cross.

    Where it goes

    County Clerk of the county where the property is located.

    How

    Lodge the completed, sworn, notarized claim for record with the County Clerk, together with any bond, letter of credit or funds the arbitrator required.

    Proof to keep

    The date- and time-stamped copy from the Clerk, the arbitrator's determination, and proof of the date you received it.

    If you miss it: Failing to lodge the claim, or to furnish the required bond, letter of credit or funds, within the 10-day period makes any lien claim invalid.

    N.J.S.A. 2A:44A-6(a)(2); N.J.S.A. 2A:44A-21(b)(8)(opens the statute in a new tab)
13. 13

    Step 13: Serve a copy of the lien claim within 10 days of recording it

    Within 10 days following the lodging for record of the lien claim.

    Recording is only half the job. Service is a condition precedent to enforcing the lien. This step is missing from most checklists and it is also what determines how much your lien is worth — money the owner pays out before you serve comes straight off the top of what you can recover.

    Where it goes

    The owner or community association, and the contractor and any subcontractor against whom the claim is asserted.

    How

    Either personal service under the New Jersey Rules of Court, or registered mail, certified mail or a commercial courier whose regular business is delivery service, sent at the same time as an ordinary mailing to the last known business or residence address. Certified mail on its own, without the simultaneous ordinary mailing, does not match what the statute describes.

    Proof to keep

    Return receipts, courier tracking, a certificate of mailing for the ordinary mail, and a dated copy of what went to each party. This is what wins the argument later.

    If you miss it: Service is a condition precedent to enforcement. Late service does not automatically destroy the lien — but a party who was not served on time defeats enforcement if it proves it was materially prejudiced, and if that party disbursed funds or created an interest in the property in the meantime, that is prima facie material prejudice. Separately, every dollar the owner pays the contractor before you serve reduces your lien fund, and if the owner has fully paid by then your lien can be worth zero even though it was filed perfectly on time.

    N.J.S.A. 2A:44A-7; enforceability at N.J.S.A. 2A:44A-6(b); lien fund at N.J.S.A. 2A:44A-9(opens the statute in a new tab)
14. 14

    Step 14: Watch the mail for a written demand that you sue — you then have 30 days

    Within 30 days following receipt of the notice. It can arrive on day 10 of your one-year window.

    This is the lever the other side can pull, and most contractors never see it coming. The owner, the community association, the general contractor or a subcontractor above you can serve a written notice requiring you to start the foreclosure action. Once you receive it, your year is gone and you have 30 days.

    Where it goes

    Superior Court, in the county where the property is located.

    How

    The notice reaches you by personal service or certified mail, return receipt requested. Your response is to file suit in the Superior Court.

    Proof to keep

    The envelope and the notice itself with the date you received it, and your file-stamped complaint.

    If you miss it: You forfeit all rights to enforce the lien and you must immediately discharge it of record. Whichever comes first — the one year or the 30 days — controls.

    N.J.S.A. 2A:44A-14(a)(2)(opens the statute in a new tab)
15. 15

    Step 15: Sue to enforce within one year of your last day of work

    Within one year of the date you last provided work, services, material or equipment for which the lien claim was filed. File on day 90 of a non-residential job and you have roughly 275 days left, not 365. On a residential job the mandatory arbitration track alone can eat around 110 days, and nothing about it stops this clock.

    This is the deadline New Jersey contractors get wrong most often, and it is always wrong in the fatal direction. The year runs from the date you last provided work, services, material or equipment — not from the day you filed the lien. Every day you spend before filing is a day burned off this year.

    Where it goes

    Superior Court of New Jersey, in the county where the real property is situated.

    How

    Commence an action in the Superior Court to enforce the lien claim.

    Proof to keep

    Your file-stamped complaint and the docket number.

    If you miss it: You forfeit all rights to enforce the lien and must immediately discharge it of record. If you then fail to discharge it, you are liable for the owner's, community association's, contractor's or subcontractor's court costs and reasonable legal expenses including attorneys' fees, and the court will enter judgment against you for damages to anyone hurt by the lien.

    N.J.S.A. 2A:44A-14(a)(1), (b)(opens the statute in a new tab)
16. 16

    Step 16: Discharge the lien once it is paid, settled or forfeited

    Within 30 days of payment, satisfaction or settlement, or within 7 days of a demand by any interested party.

    When the claim is resolved — or when you have lost the right to enforce it — you have an affirmative duty to clear it off the property record. This is not optional housekeeping; leaving a dead lien on record is what turns a lost claim into a money judgment against you.

    Where it goes

    County Clerk of the county where the property is located.

    How

    File a certificate, duly acknowledged or proved, directing the County Clerk to discharge the lien claim of record.

    Proof to keep

    The filed discharge certificate and the Clerk's receipt.

    If you miss it: You are liable for all court costs and reasonable legal expenses, including attorneys' fees, incurred by the owner, community association, contractor or subcontractor in defending or causing the discharge — plus damages.

    N.J.S.A. 2A:44A-30; liability at N.J.S.A. 2A:44A-14(b)(opens the statute in a new tab)

Who can claim a lien in New Jersey

Where you file

Office

County Clerk (Register of Deeds and Mortgages in counties having that office) of the county where the real property is located. PUBLIC WORKS ONLY: the chairman, head officer, secretary or clerk of the public agency, per N.J.S.A. 2A:44-132.

Recording fee

$15–$50

Notarization

Required

Sworn or verified

Under oath

How it is served

Certified mail

Copies

1

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

What trips people up in New Jersey

• Believing the year to sue starts when you file the lien. It does not. It starts on your last day of work. This is the single most expensive error in New Jersey, because the mistake always runs in the direction of suing after the lien is already forfeited. N.J.S.A. 2A:44A-14(a)(1).
• Never knowing about the 30-day demand to sue. Any owner, community association, contractor or subcontractor above you can serve a written demand that cuts your enforcement window to 30 days from receipt. Note that your own general contractor can start that clock against you, not just the owner. N.J.S.A. 2A:44A-14(a)(2).
• A residential general contractor assuming preliminary notice is a subcontractor problem. It is not. The Notice of Unpaid Balance is a condition precedent to any lien on a residential construction contract, with no carve-out for being in direct privity with the homeowner. Skip it and you have no lien at all. N.J.S.A. 2A:44A-21(b)(1); 2A:44A-5(c).
• Calling a residential job "commercial" because it is big. The test is statutory: a one-, two- or three-family residence, or a unit in a recorded residential development. Get it wrong in that direction and you skip the 60-day Notice and the arbitration and the lien is void. Get it wrong the other way and you only waste effort. When the project is ambiguous — mixed-use, condo conversion, small multi-family — the safe move is the residential track. N.J.S.A. 2A:44A-2.
• Assuming a four-family or larger rental apartment building is "residential." It is not a "dwelling" under the statute and, unless the units are being sold as recorded residential units, it runs the ordinary 90-day track. A contractor who waits for a 120-day residential deadline on a rental apartment job is finished on day 91. N.J.S.A. 2A:44A-2; 2A:44A-6(a)(2).
• Treating 120 days as the residential deadline. It is an outer wall, not a working deadline. The real gate is day 60 for the Notice of Unpaid Balance. If you miss day 60, day 120 never arrives for you. N.J.S.A. 2A:44A-21(b)(1).
• Thinking a punch-list or warranty visit restarts the clock. Work done after your contract is complete or terminated — warranty calls, service calls, callbacks — cannot be used to set your last-furnishing date. N.J.S.A. 2A:44A-6(d).
• Recording the lien and stopping there. Service within 10 days is a condition precedent to enforcement, and an unserved party who was prejudiced defeats the lien. Worse, the lien fund is reduced by every payment the owner makes before you serve — so a perfectly timely lien can be worth nothing. N.J.S.A. 2A:44A-7; 2A:44A-9.
• Sending certified mail alone. The statute describes registered mail, certified mail or a commercial courier sent simultaneously with an ordinary mailing. Certified by itself does not match the statutory method. N.J.S.A. 2A:44A-7.
• Filing when you are below the second tier. A supplier to a supplier, or a subcontractor under a subcontractor who is not directly under the general contractor, has no New Jersey lien rights at all. N.J.S.A. 2A:44A-2.
• Mailing on the deadline. "Lodged for record" means the County Clerk received it. A claim rejected for a formatting defect and re-lodged two days later is simply late.
• Rounding the number up, or including unearned work. A claim that is without basis, willfully overstated, or not in substantially the required form means forfeiture plus liability for the other side's court costs, legal expenses, attorneys' fees and damages. There is a parallel fee-shifting provision for a defective residential Notice of Unpaid Balance. N.J.S.A. 2A:44A-15; 2A:44A-21(b)(12).
• Filing an unnotarized or unsworn claim. The claim must be signed, acknowledged and verified by oath. An unsworn claim is not in substantially the required form. N.J.S.A. 2A:44A-6(a)(1); 2A:44A-8.
• Supplying materials under a UCC Article 9 security agreement and expecting lien rights. No lien attaches to those materials. N.J.S.A. 2A:44A-5(a).
• Filing a county construction lien on a public job. No lien attaches to public works awarded by a public entity, and while you are filing the wrong document you may be running out the Municipal Mechanics' Lien and payment-bond deadlines, which go to the public agency instead. N.J.S.A. 2A:44A-5(b); 2A:44-132.
• Waiting for a notice of commencement to appear. New Jersey does not have one. There is nothing to search for and nothing to attach your rights to. The closest thing is the owner's right to demand a full list of subcontractors and suppliers from the contractor within 10 days. N.J.S.A. 2A:44A-37.

After you file

• Serve the lien claim within 10 days and keep the proof. This is the step that decides both whether you can enforce the lien and how much it is worth. N.J.S.A. 2A:44A-7.
• Expect the owner to withhold from the contractor. Once a lien claim is served the owner or community association may hold back the claimed amount out of money still owed up the chain, and may pay you directly unless the contractor objects in writing within 20 days explaining why the claim is invalid. That objection window is often where the case actually gets resolved. N.J.S.A. 2A:44A-12.
• Expect the lien to be bonded off. The owner can discharge your lien from the property record by posting a surety bond at 110% of the claim, by court order, or by other statutory means. Your claim is not gone — it moves to the bond — but the property is cleared. N.J.S.A. 2A:44A-33.
• Keep watching the mail. A written demand to commence suit can arrive at any time and drops your enforcement window to 30 days from receipt. Treat any certified letter from the owner, the community association, your general contractor or a subcontractor above you as urgent. N.J.S.A. 2A:44A-14(a)(2).
• Calendar the real enforcement date now: one year from your last day of work, not one year from filing. Then calendar it earlier than that, because the arbitration on a residential job and any delay in filing have already eaten into it. N.J.S.A. 2A:44A-14(a)(1).
• Recording the lien does not collect the money. You still have to bring an action in the Superior Court in the county where the property sits to enforce it. N.J.S.A. 2A:44A-14(a).
• When the claim is paid, settled or forfeited, file the discharge certificate — within 30 days of resolution, or within 7 days of anyone's demand. Failing to do it makes you liable for the other side's costs, attorneys' fees and damages. N.J.S.A. 2A:44A-30; 2A:44A-14(b).
• If more than one lien is filed and there is not enough money to go around, claims are paid out of the lien fund on a pro rata basis rather than first-come-first-served. N.J.S.A. 2A:44A-23.