Pennsylvania: Mechanic's Lien Deadlines & Notice Requirements
The short answer
Pennsylvania runs on a 6-month recording deadline: every claimant, contractor or subcontractor alike, must file a lien claim with the county prothonotary within 6 months after finishing work. Subcontractors carry an extra step contractors don't: 30 days' written notice of intent to file before they can file at all. After filing, the claim must be served on the owner within 1 month, and a suit to enforce it (obtain judgment) must start within 2 years. Pennsylvania has no preliminary notice at the start of the job and no owner filing that shortens these windows, but it does cut off a subcontractor's lien rights on smaller residential jobs once the owner has paid the general contractor in full.
| 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 | No notice is required at or before the start of work. A subcontractor (never a contractor) must instead give the owner 30 days' written formal notice of intent to file before filing the lien itself; missing it makes the claim invalid unless filed under 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)) |
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The short answer
Pennsylvania's mechanic's lien law dates to 1963 and has never been folded
into the state's numbered statute titles, so it's still cited the old way:
49 P.S. followed by a section number. The core deadline is simple and the
same for everyone — file the lien with the county prothonotary within 6
months of finishing the work — but a subcontractor has an extra step a
contractor doesn't: 30 days' written notice of intent to file, sent before
the lien itself goes on file. There's no notice required at the start of
the job, and no owner filing anywhere in the statute that shortens the
6-month window. Once filed, the claim has to be served on the owner within
a month, and a lawsuit to get judgment on it has to start within 2 years.
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 no notice requirement at the start of a job. Instead, a
subcontractor (contractors are exempt from this step) must send the owner a
"formal written notice of intention to file a claim" at least 30 days before
actually filing the lien. The only way around it is if the subcontractor is
responding to a court-ordered "rule to file" under section 506, which
substitutes for the 30-day notice. This formal notice is distinct from — and
in addition to — the 30-day count itself; miss it and the claim "shall [not]
be valid."
Deadline to file the lien
Every claimant, contractor or subcontractor, must "file a claim with the
prothonotary... within six (6) months after the completion of [their]
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
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.
Waiting until day 150 of a 180-day window to send the notice, then trying to
file on day 165, still works — waiting until day 175 does not. 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, which is exactly the risk a preliminary
notice regime in other states is designed to flag early — Pennsylvania has
no such early-warning step for a residential subcontractor to fall back on.
Common questions
Do I have to send a preliminary notice before I start work in
Pennsylvania?
No. Pennsylvania has no notice requirement before or during the job. The
only notice step is the subcontractor's 30-day notice of intent to file,
which comes before filing the lien, not before starting work.
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 2026-07-04) - 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 2026-07-04) - 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 2026-07-04) - 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 2026-07-04) - 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 2026-07-04) - 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 2026-07-04) - 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 2026-07-04) - 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 2026-07-04)
Source links
Every statute quoted above, linked, with the date we checked it.