Pennsylvania Notice of Intention & Mechanics' Lien — 49 P.S. § 1501 / § 1502 / § 1701 Filing Guide (2026)
✓ Verified against Pennsylvania statutes · Reviewed August 2026 · By Michael Evan — Founder · 50 states · 799 rules
Pennsylvania mechanics lien deadlines at a glance
Preliminary Notice
Formal notice — Subs must file Formal Notice
Mechanics Lien
6 months — From last date of furnishing
Enforcement
2 years — From filing
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What Is the Pennsylvania Mechanics' Lien Framework and How Does the Lien Workflow Operate?
Pennsylvania's mechanics' lien framework is the Mechanics' Lien Law of 1963, 49 P.S. § 1101 et seq. For a subcontractor the workflow runs in several steps: (0) on a searchable project costing $1,500,000 or more, check the State Construction Notices Directory and, if the owner filed a Notice of Commencement, file a Notice of Furnishing within 45 days of first furnishing (§ 1501.1 et seq.); (1) serve a formal written § 1501(b) Notice of Intention on the owner at least 30 days before filing the claim; (2) file the lien claim with the Prothonotary of the Court of Common Pleas within 6 months of completing the work (§ 1502(a)(1)); (3) serve written notice of filing on the owner within 1 month and file an affidavit of service within 20 days (§ 1502(a)(2)); and (4) file the complaint to enforce within 2 years of filing the claim (§ 1701(b)), obtaining judgment within 5 years (§ 1701(d)). The prime contractor, who deals directly with the owner, skips the Notice of Intention. Pennsylvania is distinctive in three respects: Prothonotary filing (the claim is a court record, not recorded in the land records, so a claimant who files with the recorder of deeds does not perfect the lien), the 30-day Notice of Intention prerequisite (a subcontractor who files without it has an invalid lien), and the State Construction Notices Directory (a missed 45-day Notice of Furnishing on a searchable project forfeits lien rights).
Who Must Serve a Pennsylvania Notice of Intention
The formal written Notice of Intention under 49 P.S. § 1501(b) is required of subcontractors — claimants who furnish labor or materials but do not have a direct contract with the owner. A subcontractor must give the owner a formal written Notice of Intention to file a mechanics' lien claim at least 30 days before the claim is filed. Under § 1501(d), service is made by first class, registered, or certified mail on the owner or the owner's agent, by an adult in the same manner as a writ of summons in assumpsit, or — if service cannot be made that way — by posting the notice on a conspicuous public part of the improvement. A subcontractor who files a claim without having served a proper Notice of Intention at least 30 days earlier has an invalid lien. The prime contractor in privity with the owner is excused and proceeds straight to filing the claim; the Notice of Intention is a subcontractor-only condition precedent.
Prothonotary Filing & the State Construction Notices Directory — Pennsylvania's Threshold Traps
Two Pennsylvania features catch out-of-state claimants. First, where the claim is filed: a Pennsylvania mechanics' lien claim is filed with the Prothonotary of the Court of Common Pleas of the county where the property lies — the civil-court clerk — and docketed as a court record, not recorded in the land records with a recorder of deeds. A claimant who files in the land records never perfects the lien. Second, the State Construction Notices Directory (SCND), 49 P.S. § 1501.1 et seq., added by Act 142 of 2014 and effective December 31, 2016, operated by the Department of General Services at scnd.dgs.pa.gov. The directory applies only to 'searchable projects' — those costing $1,500,000 or more under § 1201(18). On a searchable project, once the owner files a Notice of Commencement, a subcontractor must file a Notice of Furnishing in the directory within 45 days of first furnishing or forfeit lien rights. The trap is silent: nothing tells a subcontractor that a Notice of Commencement was filed, so the subcontractor must affirmatively search the directory at the start of any large job. On projects under $1,500,000 or with no Notice of Commencement, the SCND does not apply.
§ 1501(b) Notice of Intention, § 1502 Filing, and the § 1701 Two-Year Deadline
For a subcontractor, the § 1501(b) Notice of Intention comes before filing: served on the owner at least 30 days before the claim is filed, by the means § 1501(d) allows. The lien is perfected by filing the claim with the Prothonotary of the Court of Common Pleas within 6 months of the claimant completing its work (§ 1502(a)(1)). After filing, the claimant serves written notice of filing on the owner within 1 month and files an affidavit of service within 20 days (§ 1502(a)(2)) — Pennsylvania practice generally requires sheriff service of the notice of filing. Under § 1701(b), a complaint to enforce the lien must be filed within 2 years of filing the claim, and judgment obtained within 5 years under § 1701(d). The lien claim must contain its § 1503 required contents (the claimant, the owner, the completion date and the person contracted with, a property description, and the amount claimed after credits). The six-month window runs from the date the claimant completed its work — not the invoice date, a punch-list visit, or overall project completion.
Tier Limits, the $500 Minimum, and the Residential Owner-Paid-in-Full Defense
Pennsylvania limits lien rights by contractual tier. Under 49 P.S. § 1201(4) and (5), the prime contractor, a first-tier subcontractor in privity with the contractor, and a second-tier subcontractor in direct privity with a first-tier subcontractor can claim a lien — but the definition of 'subcontractor' expressly excludes a person who contracts with a materialman (supplier-to-supplier) and a subcontractor below the second tier. Section 1303(a) confirms no lien is allowed in favor of anyone other than a contractor or subcontractor as defined, so a sub-sub-subcontractor or supplier-to-supplier generally has only contract or unjust-enrichment remedies. Under § 1301(a), the claim must exceed $500. Under § 1301(b) (Act 117 of 2014), a subcontractor has no lien on residential property — a single townhouse or a building of one or two dwelling units used as a residence — if the owner paid the general contractor the full contract price. On the waiver side, § 1401 makes advance 'no-lien' waivers void as against public policy on nonresidential property, while permitting waivers on residential property.
Filing Fees and Where to File
The Pennsylvania mechanics' lien claim is filed with the Prothonotary of the Court of Common Pleas of the county where the property is located — one of Pennsylvania's 67 counties (in Philadelphia, the Office of Judicial Records performs the Prothonotary's function) — not a recorder of deeds. Prothonotary filing fees are generally a modest per-document court fee (commonly in the $50–$110 range depending on the county), and serving the § 1501(b) Notice of Intention by certified mail typically runs under $15 per party. Filing a Notice of Furnishing in the State Construction Notices Directory is generally free or low-cost through the DGS online system. Commencing the § 1701 enforcement action by complaint in the Court of Common Pleas adds a civil filing fee (commonly $100–$300 depending on the county) plus sheriff service costs. Total perfection-and-enforcement filing costs typically run $300–$600 before attorney fees. Confirming the correct Prothonotary, that any subcontractor served the § 1501(b) Notice of Intention at least 30 days before filing, that any required SCND Notice of Furnishing was filed within 45 days on a searchable project, that the claimant has lien rights under the § 1201(5) tier limit, and that the § 1701 two-year enforcement deadline is calendared is the most important intake step.
Frequently Asked Questions
What is the Pennsylvania Notice of Intention to file a mechanics' lien under 49 P.S. § 1501?
The Pennsylvania Notice of Intention is a formal written notice that a subcontractor must give the property owner, under 49 P.S. § 1501(b), at least 30 days before filing a mechanics' lien claim. The general contractor — who has a direct contract with the owner — does NOT have to give it; it is a subcontractor-only condition precedent. Under § 1501(d) the notice is served by first class, registered, or certified mail on the owner or the owner's agent, by an adult in the same manner as a writ of summons in assumpsit, or, if service cannot be made that way, by posting it on a conspicuous public part of the improvement. A subcontractor who files a claim without first serving a proper Notice of Intention at least 30 days earlier has an invalid lien. It is separate from any Notice of Furnishing required in the State Construction Notices Directory on a searchable project.
Where is a Pennsylvania mechanics' lien filed — the Prothonotary or the recorder of deeds?
A Pennsylvania mechanics' lien claim is filed with the Prothonotary of the Court of Common Pleas of the county where the property is located — NOT with the county recorder of deeds. The Prothonotary is the civil-court clerk, and the claim is docketed as a court record rather than recorded in the land records. This is one of Pennsylvania's most distinctive features and a frequent trap for out-of-state contractors accustomed to recording liens with a register or recorder of deeds. A claimant who files with the recorder of deeds does not perfect the lien. Under 49 P.S. § 1502(a)(1) the claim must be filed with the Prothonotary within 6 months after the claimant completed its work.
What is the Pennsylvania State Construction Notices Directory and the 45-day Notice of Furnishing?
The State Construction Notices Directory (SCND) is an online registry operated by the Pennsylvania Department of General Services (scnd.dgs.pa.gov), added by Act 142 of 2014 and codified at 49 P.S. § 1501.1 et seq., effective December 31, 2016. It applies only to 'searchable projects' — those costing $1,500,000 or more under § 1201(18). On a searchable project, once the owner files a Notice of Commencement, a subcontractor MUST file a Notice of Furnishing in the directory within 45 days of first furnishing labor or materials to preserve its lien rights — a subcontractor who fails to file it forfeits the lien. The trap is silent: a subcontractor must affirmatively check the directory at the start of a large job, because if a Notice of Commencement is on file, the 45-day clock runs from first furnishing. The directory does not apply to projects under $1,500,000 or with no Notice of Commencement.
How long does a Pennsylvania mechanics' lien last and when must suit be filed?
Under 49 P.S. § 1701(b), the claimant must file a complaint to enforce the lien within 2 years of the date the claim was filed with the Prothonotary, unless the owner agrees in writing to extend the time. A claimant who does not file the enforcement complaint within 2 years loses the lien. In addition, under § 1701(d), judgment must ultimately be obtained within 5 years of filing the claim. After filing the claim, the claimant must also serve written notice of the filing on the owner within 1 month and file an affidavit of service within 20 days under § 1502(a)(2); Pennsylvania practice generally requires the notice be served by the sheriff. Because the two-year enforcement clock runs from the filing date and cannot be extended by settlement negotiations, the deadline should be calendared the moment the claim is filed.
Who can file a Pennsylvania mechanics' lien — are sub-subcontractors covered?
Pennsylvania limits mechanics' lien rights to contractors and subcontractors as defined in 49 P.S. § 1201(4) and (5). The general (prime) contractor in privity with the owner can file, a first-tier subcontractor in privity with the contractor can file, and a second-tier subcontractor in direct privity with a first-tier subcontractor can file. But the definition of 'subcontractor' in § 1201(5) expressly excludes a person who contracts with a materialman (supplier-to-supplier) and a subcontractor below the second tier — so a sub-sub-subcontractor, or a supplier to a supplier, generally has no lien rights. Section 1303(a) reinforces that no lien is allowed in favor of anyone other than a contractor or subcontractor as defined. A claimant uncertain of its tier should confirm its contractual chain before relying on lien rights, because a remote supplier may have only breach-of-contract or unjust-enrichment remedies.
What is the minimum claim amount and the owner-paid-in-full defense in Pennsylvania?
Under 49 P.S. § 1301(a), a Pennsylvania mechanics' lien claim must exceed $500 — a claim of $500 or less cannot support a lien. Under § 1301(b), added by Act 117 of 2014, a subcontractor has NO lien on residential property if three conditions are met: (1) the owner or tenant paid the full contract price to the general contractor; (2) the property is or will be used as the residence of the owner or a subsequent residential owner who paid in full, or as a tenant's residence; and (3) the property is a single townhouse or a building of one or two dwelling units. The owner-paid-in-full defense protects residential homeowners who paid their GC from having to pay twice. It applies only to the residential categories the statute defines — not commercial owners or larger residential projects. Subcontractors on small residential jobs should treat early payment by the owner to the GC as a serious risk to the lien.
How does Pennsylvania handle lien waivers, public works, and federal projects?
Under 49 P.S. § 1401, advance 'no-lien' waivers are void as against public policy on nonresidential property (valid only to the extent of payment actually received, or where the contractor posted a payment bond); on residential property, waivers remain permitted. No mechanics' lien attaches to public property, so on Commonwealth, county, municipal, and authority public works an unpaid subcontractor or supplier pursues the prime contractor's payment bond required by the Public Works Contractors' Bond Law of 1967, 8 P.S. § 191 et seq. (bonds required on public contracts exceeding $10,000 under 8 P.S. § 193). On federal projects the federal Miller Act at 40 U.S.C. § 3131 et seq. governs. Pennsylvania's federal construction base includes Tobyhanna Army Depot, Letterkenny Army Depot near Chambersburg, Carlisle Barracks and the U.S. Army War College, the Defense Distribution Center Susquehanna at New Cumberland, Naval Support Activity Mechanicsburg, Fort Indiantown Gap, and the Naval Surface Warfare Center Philadelphia Division at the Navy Yard. Private prompt payment is governed by CASPA, 73 P.S. § 501 et seq., and public prompt payment by the Commonwealth Procurement Code, 62 Pa.C.S. § 3931 et seq.