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Pennsylvania mechanics lien deadlines for contractors

A plain-English summary of how a contractor, subcontractor or supplier protects payment with a mechanics lien in Pennsylvania. Last checked 2026-10-05. This is general information, not legal advice. Verify with your attorney before you rely on any deadline.

The rules at a glance

  • Who: contractors and subs only, claim over $500 (MLL 301, 303)
  • NTO: none; searchable projects ($1.5M+) sub files Notice of Furnishing within 45 days (501.3). NOC: optional
  • Claim: 6 months from completion; serve notice on owner within 1 month (502). Foreclosure: 2 years from filing (701)
  • Waiver forms: none. Residential: no sub lien on 1-2 unit residence if owner paid contractor in full (301(b))

Source and last verified

Official source: https://www.legis.state.pa.us/WU01/LI/LI/US/HTM/1963/0/0497..HTM. Last verified 2026-10-05. Deadlines often differ for residential and commercial projects and change when the law changes. Verify with your attorney.

How BossHours helps

BossHours loads state rules into the app and shows a verify-with-your-attorney note beside each one, so notices and waivers are prepared from your job records. It does not give legal advice.

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Pennsylvania mechanics lien deadlines for contractors