Mechanic's Lien vs. Bond Claim: Which Remedy Applies to Your Project?
When a subcontractor or supplier doesn't get paid on a construction project, their primary legal remedies fall into two categories depending on the project type. On private construction, they have mechanic's lien rights — a statutory claim that attaches to the real property. On public construction (federal, state, or local government projects), they have bond claim rights — a statutory claim against the payment bond the prime contractor posted at the project's start.
The choice isn't optional; it's determined by the project type. A sub working on a private office building cannot file a bond claim — there may not even be a bond. A sub working on a federal courthouse cannot file a mechanic's lien — government property is lien-exempt. Identifying which remedy applies on day one of the project, and tracking the procedural requirements for that remedy from the start, is essential.
A mechanic's lien attaches to real property. If the project owner doesn't resolve the unpaid amount, the lien claimant can ultimately force a foreclosure sale of the property and collect from the proceeds. The remedy runs through the specific physical asset that the unpaid work improved.
A bond claim attaches to a surety bond. The surety company issuing the bond has committed to pay the claim up to the bond's face value if the prime contractor fails to pay the sub. The claim runs through the surety, not through the property itself. Public property — courthouses, schools, highways, government buildings — can't be foreclosed, so the bond is the statutory substitute.
Project type and applicable remedy
- Private commercial construction — mechanic's lien applies; payment bond may or may not exist (if it does, bond claim is an additional option)
- Private residential construction — mechanic's lien applies, with state-specific rules for owner-occupied residential
- Federal government construction (Miller Act projects over $150K) — bond claim applies; no mechanic's lien against federal property
- State public construction (Little Miller Act) — bond claim applies; no lien against state property
- Local government (city, county, school district) construction — typically bond claim per state Little Miller Act; no lien against public property
- Private projects with bonding — both mechanic's lien and bond claim potentially available; different claimants may prefer different paths
The two remedies have very different procedural requirements. Understanding these up front matters because the deadlines are strict and missing them forecloses the remedy entirely.
Typical mechanic's lien procedure
- Preliminary notice (Notice to Owner, 20-Day Notice, etc.) — required at project start in most states, with deadlines from first work
- Lien filing deadline — typically 60-120 days after last work, varying by state
- Recording the lien claim in the county real property records where the project is located
- Service of the lien claim on the property owner
- Foreclosure lawsuit deadline — typically 6-12 months after lien recording, varying by state
- Discharge of lien upon payment, bonding-off, settlement, or foreclosure
Typical bond claim procedure
- Pre-claim notice (for second-tier claimants) — Miller Act requires 90-day notice from last work
- Formal bond claim — demand letter to the surety identifying the project, amount, and supporting documentation
- Surety investigation period — surety reviews the claim and the contractor's position
- Suit on the bond — deadline typically one year from last work (federal Miller Act) or per state law
- Judgment and collection against the bond
Both remedies have pre-claim notice requirements for certain categories of claimants, but the mechanics differ.
Notice comparison
- Mechanic's lien preliminary notice — filed at project start or shortly after first work; applies to anyone not in direct contract with the owner in most states
- Bond claim pre-claim notice — required only for second-tier claimants (those contracted with a first-tier sub, not the prime); due within 90 days of last work under Miller Act
- Direct contract with owner — no preliminary notice required for either remedy; the owner already knows about the claimant
- Direct contract with prime on public work — no pre-claim notice required; first-tier claimants can go straight to bond claim
The biggest procedural error on public work is assuming the remedy is the same as on private work. A sub on a federal project who files a mechanic's lien in the county records accomplishes nothing — the lien is against property that can't be foreclosed. Meanwhile, the 90-day bond claim notice deadline may be running while the sub's energy is misdirected.
Both remedies typically cover unpaid labor and materials furnished to the project. The scope of what can be claimed is similar in practice but differs in specific detail.
Claim scope comparison
- Principal amount owed — covered by both
- Interest — often covered by both, at state-specific rates
- Attorney's fees — varies by statute; some lien statutes allow them, federal Miller Act generally doesn't but many state Little Miller Acts do
- Retainage — specifically recoverable under both, with separate filing deadline considerations
- Consequential damages — generally not recoverable under either; both are focused on direct payment for work performed
- Supplier claims on materials — recoverable under both, subject to tier limitations
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The practical mechanics of collecting also differ between the two remedies.
Most mechanic's liens never go to foreclosure — they get resolved through payment, settlement, or bonding-off. The lien itself creates an encumbrance on the property that blocks sale or refinance, and that pressure usually drives resolution. Foreclosure is available as a fallback but is expensive and slow.
Bond claims are typically paid directly by the surety once the claim is validated. The surety has an incentive to resolve claims quickly rather than litigate, because ongoing litigation costs the surety in legal fees and reserves. Many bond claims resolve within weeks or months once the formal claim is filed, faster than the typical mechanic's lien collection timeline.
On private projects where the prime contractor has posted a payment bond (some private owners require bonding on large projects), both mechanic's lien and bond claim rights may be available. A sophisticated sub or supplier may pursue both in parallel, or may choose whichever is procedurally easier given the circumstances.
The choice often depends on the specific facts. A sub who missed a mechanic's lien deadline but is within the bond claim window goes with bond claim. A sub facing a surety that disputes the claim may prefer the lien approach that puts direct pressure on the property. A sub whose claim is too small to justify lien foreclosure litigation may pursue bond claim which typically resolves faster and more cheaply.
For any construction project, the sub or supplier should determine at the start which remedy applies and secure the underlying information.
Project-start information to gather
- Project type — private vs. public
- Property owner identification — needed for both mechanic's lien and bond claim notice
- General contractor identification and contract amount
- For public projects — copy of the payment bond, surety name, bond number, surety claim contact
- For private projects — title information for legal property description used in lien filing
- Project address and legal description
- State-specific deadlines calculated from project start
Both remedies are highly procedural, and mistakes in procedure can foreclose otherwise-valid claims. For meaningful dollar amounts, construction law counsel should be consulted early — ideally before missing any deadlines, but certainly before formally asserting either remedy. The cost of competent construction law advice is almost always lower than the cost of losing a claim on procedural grounds.
Mechanic's lien and bond claim are parallel payment remedies designed for different project types — lien for private, bond claim for public, sometimes both on private-with-bond. Getting the classification right at project start and tracking the specific deadlines for whichever remedy applies is essential. Both remedies are powerful when properly invoked and worthless when procedural deadlines are missed. For subs and suppliers, the disciplined practice of identifying which remedy applies on every project, on day one, is the foundation of reliable payment protection across the portfolio.
Written by
Jordan Patel
Compliance & Legal
Former corporate counsel specializing in construction contracts and tax compliance. Writes about the documentation layer — COIs, W-8/W-9, certified payroll, notice-to-owner deadlines — and the legal backbone behind audit-ready AP.
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