Connecticut: Mechanic's Lien Waiver Form and Advance-Waiver Rules

Requirements one by one

First determine whether the contract is covered

Section 42-158i(2) defines the contracts that receive § 42-158l's anti-waiver
protection. It reaches Connecticut construction, renovation, and rehabilitation
contracts entered on or after October 1, 1999, including subcontracts at each
tier.

The same definition excludes four groups: public-works and other government
building contracts, projects funded or insured by HUD, owner-contractor
contracts for $25,000 or less and subcontracts resulting from them, and buildings
intended for residential occupancy with four or fewer units. Section 42-158l
does not answer the waiver question for an excluded contract.

Future or unpaid work cannot be swept into the waiver

For a covered contract, § 42-158l(a) reaches two documents: a provision inside
the construction contract and a periodic lien waiver issued under that contract.
Either is "void and of no effect" to the extent it releases a contractor's,
subcontractor's, or supplier's mechanic's-lien or payment-bond rights for
services, labor, or materials "which have not yet been performed and paid for."

The phrasing requires both parts before the protected rights may be released:
the work must have been performed and it must have been paid for. A progress
waiver cannot use an advance through date to surrender later work, and it cannot
release completed but unpaid work within the covered statutory scheme.

Connecticut regulates scope, not a form

Section 42-158l supplies no conditional, unconditional, progress, or final form.
It states no required fields, warning, type size, signature title, notarization,
or cleared-check mechanism. A privately drafted form still must respect the
performed-and-paid limit when the contract is covered.

Subsection (b) creates one express boundary: the statute does not prohibit
subordinating a mechanic's lien to a mortgage or security interest, or enforcing
an agreement to do so. Subordination changes priority; it is not the same as
releasing the lien rights altogether.

What trips people up

The project exclusions are easy to miss. A waiver on a two-family home, a small
owner contract at or below $25,000, a public project, or a HUD-funded or -insured
project does not receive § 42-158l's protection merely because the work occurs in
Connecticut. That does not automatically validate the waiver; it means this
particular statute does not govern it.

The statute also does not say that a check must clear. Its words are "performed
and paid for." A conditional-on-clearance clause can be important drafting, but
it is not a Connecticut statutory form or safe harbor.

Common questions

Can a covered subcontract waive lien rights for future work in the subcontract?
No. Section 42-158l(a) makes the provision void and of no effect for services,
labor, or materials not yet both performed and paid for.

Does Connecticut require a conditional or unconditional waiver form?
No. Section 42-158l regulates the rights that may be released but prescribes no
payment-stage form, warning, or notarization.

May a mechanic's lien be subordinated to a construction mortgage?
Yes. Section 42-158l(b) expressly preserves both subordination and enforcement
of an agreement to subordinate the lien to a mortgage or security interest.

Statutes and sources

• Conn. Gen. Stat. § 42-158i(2), covered construction-contract definition and
  exclusions, reproduced in the official Connecticut Judicial Branch 2025 guide —
  https://www.jud.ct.gov/lawlib/Notebooks/Pathfinders/Mechanics_Liens.pdf
  (accessed 2026-07-23)
• Conn. Gen. Stat. § 42-158l, void future/unpaid lien and bond waivers;
  subordination exception —
  https://www.cga.ct.gov/current/pub/chap_742b.htm#sec_42-158l
  (accessed 2026-07-23)