Mechanic's Lien Deadlines & Notice Requirements in Pennsylvania
At a glance
| Governing law | Mechanics' Lien Law of 1963, 49 P.S. §§ 1101-1902 (an unconsolidated act, not part of the numbered Pa.C.S. titles) |
|---|---|
| Who can claim a lien | Only a 'contractor' (direct contract with the owner) or 'subcontractor' (contract with the contractor, or with another subcontractor in direct privity with the contractor) may claim; sub-subcontractors and remote suppliers have no lien right at all (§ 1201(4)-(6)) |
| Preliminary notice | Searchable project ($1.5 million+): if owner filed and posted Notice of Commencement, subcontractor files directory Notice of Furnishing within 45 days after first work/materials or forfeits lien (§§ 1201(18), 1501.3). Separately, every subcontractor gives owner 30 days' formal notice before filing unless using a court-ordered rule to file (§ 1501(b.1)) |
| Deadline to file the lien | 6 months after completion of the claimant's work, same count for contractors and subcontractors (§ 1502(a)(1)) |
| Notice of completion effect | No such mechanism exists in this act; an owner's optional 'Notice of Completion' filed on the state construction-notices directory is expressly informational only and cannot be used to determine any deadline (§ 1501.4(c)-(d)) |
| Serving the lien on the owner | Written notice of the filing must be served on the owner within 1 month after filing; failure to serve, or to file proof of service within 20 days after service, is grounds to strike the claim (§ 1502(a)(2)) |
| Deadline to sue to foreclose | 2 years from the date the claim was filed to commence an action to obtain judgment on it, extendable only by the owner's written agreement (§ 1701(b)) |
| Homestead/residential extras | A subcontractor has no lien right at all on a paid-up-front residential job: no lien if the owner or tenant already paid the contractor in full for a single/two-unit dwelling or townhouse the owner occupies or will occupy (§ 301(b)); an existing claim on such a property must be discharged, or reduced to the unpaid balance, on the owner's petition (§ 510(f)) |
Requirements one by one
Governing law
Pennsylvania's lien statute is the Mechanics' Lien Law of 1963 (Act of Aug. 24, 1963, P.L. 1175, No. 497), cited as "49 P.S. § 1101" and following. Unlike most of Pennsylvania's statutes, it was never absorbed into a consolidated, numbered Pennsylvania Consolidated Statutes title — Title 49 is reserved for it in name only. Purdon's citation numbers (the "49 P.S. § 13xx," "§ 15xx" format lawyers use) map onto the act's own internal article and section numbers: Article III's Section 301 is cited as § 1301, Article V's Section 502 is cited as § 1502, and so on.
Who can claim
The act recognizes exactly two kinds of claimant. A "contractor" has a direct contract with the owner. A "subcontractor" must be in "direct privity of a contract with a contractor" — meaning first- or second-tier subcontractors only. The definition is explicit that it "does not include... a person who contracts with a subcontractor not in direct privity of a contract with a contractor," so a third-tier sub or a suppler two contracts removed from the general contractor has no lien right under this statute at all, regardless of how much unpaid work they did.
Preliminary notice
Pennsylvania has an early directory-notice rule for a "searchable project," defined as an improvement project costing at least $1.5 million. If the owner files and posts a Notice of Commencement, a subcontractor must file a Notice of Furnishing in the directory "within forty-five (45) days after first performing work or services at the job site or first providing materials to the job site." A subcontractor that does not substantially comply "forfeits the right to file a lien claim."
Separately, a subcontractor (contractors are exempt from this step) must send the owner a "formal written notice of his intention to file a claim" at least 30 days before filing the lien. The exception is a claim filed in response to a court-ordered rule to file under section 506.
Deadline to file the lien
Every claimant, contractor or subcontractor, must "file a claim with the prothonotary as provided by this act within six (6) months after the completion of his work." That's the entire filing-deadline rule: one flat 6-month count, no separate track for different claimant tiers.
Notice of completion effect
Pennsylvania has no mechanism where an owner's filing shortens the 6-month window. The act does let an owner file an optional "Notice of Completion" on the state's construction-notices directory for larger ("searchable") projects, but the statute is explicit that this filing "shall not be considered by a court in determining compliance with timing requirements under this act" and is "purely precatory" — it exists to inform subscribers, not to start or shorten anyone's clock.
Serving the lien on the owner
After filing, the claimant must "serve written notice of such filing upon the owner within one (1) month after filing." An affidavit or acceptance of that service then has to be filed with the court within 20 days after service happens. Missing either step — the service itself or the follow-up paperwork proving it — is "sufficient ground for striking off the claim," a harder consequence than a mere presumption of prejudice.
Deadline to sue to foreclose
A claimant has 2 years from the date the claim was filed to commence an action to obtain judgment on it. That deadline can only be extended by the owner's own written agreement — there's no unilateral extension available to the claimant.
Homestead/residential extras
Under § 510(f), Pennsylvania's residential carve-out cuts the other way from most states': instead of adding a formality, it removes the lien right entirely for smaller jobs. A subcontractor has no lien at all against a single home, townhouse, or a building of one or two dwelling units that the owner occupies or will occupy, once "the owner or tenant paid the full contract price to the contractor." If the owner paid the contractor only part of the price, any subcontractor lien already filed on that property gets reduced to the amount the owner still owes the contractor, not the full amount the subcontractor is actually owed. This rule protects a homeowner who paid their general contractor in full from having to pay a second time when that contractor doesn't pass the money on to a sub.
What trips people up
People often assume the 30-day subcontractor notice and the 6-month filing deadline run back-to-back, but they don't have to: the notice just has to go out at least 30 days before filing, any time within the 6-month window. The searchable-project rule creates a separate, much earlier clock: when the owner filed and posted a Notice of Commencement, the subcontractor's Notice of Furnishing is due within 45 days after first furnishing. The residential no-lien rule also surprises subcontractors on smaller jobs: paying the general contractor in full protects a homeowner even if that contractor never pays the sub.
HB 1319 would broaden the act's definition of "materials" to include rented equipment reasonably necessary for construction. The House passed it on July 7, 2025, and it remains referred to the Senate Judiciary Committee as of August 22, 2026; it is not current law.
Common questions
Do I have to send a preliminary notice before I start work in Pennsylvania? The act does not require notice before work starts, but a subcontractor on a $1.5 million-or-more searchable project may face an early notice deadline. If the owner filed and posted a Notice of Commencement, the subcontractor must file a Notice of Furnishing within 45 days after first furnishing. The separate 30-day formal notice comes before filing the lien.
Does a general contractor have to send the 30-day notice too? No — the 30-day formal notice is only required of subcontractors. A contractor with a direct contract with the owner can go straight to filing within the 6-month deadline.
What happens if I'm a third-tier subcontractor and never get paid? The statute gives lien rights only to a contractor or a subcontractor "in direct privity of a contract with a contractor." A sub-subcontractor or supplier further down the chain has no lien remedy under this act at all, whatever the underlying debt.
Statutes and sources
- 49 P.S. § 1101 (short title) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=1&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1201(4)-(5) (definitions of contractor/subcontractor) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=2&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1201(18) ($1.5 million searchable-project definition) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=2&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1301(b) (residential subcontractor no-lien rule) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=3&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1501(b.1) (subcontractor's 30-day formal notice) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=5&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1501.3(b)-(c) (searchable-project Notice of Furnishing and forfeiture) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=5&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1501.4(c)-(d) (Notice of Completion is informational only) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=5&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1502(a) (filing and service deadlines) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=5&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1510(f) (residential discharge/reduction on full/partial payment) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=5&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- 49 P.S. § 1701(b) (2-year deadline to obtain judgment) — https://www.palegis.us/statutes/unconsolidated/law-information/view-statute?act=497&chpt=7&iFrame=true&sessInd=0&smthLwInd=0&txtType=HTM&yr=1963 (accessed 2026-08-22)
- PA HB 1319 (2025-2026) (pending rented-equipment amendment) — https://www.palegis.us/legislation/bills/2025/hb1319 (checked 2026-09-09)
Source links
Every statute quoted above, linked, with the date we checked it.
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