Home Contractor Contract Red Flags: The Mechanic's Lien Clause, the 10% Retainage Rule, and the Three-Day FTC Cooling-Off Right

The drywall is up. The cabinets are in boxes in the garage. The contractor stopped returning calls three weeks ago. Yesterday a process server handed your spouse an envelope at the front door. Inside: a Notice of Mechanic's Lien filed against the house for $41,800 by a subcontractor you have never met.

That is not a horror story. It is a federal-disclosure-not-required, state-licensed-but-state-doesn't-care, completely-legal sequence that happens to thousands of homeowners every year. The lien is filed because your contractor took your check, never paid the supplier, and disappeared. The supplier's recourse against the contractor is meaningless. Their recourse against your house is a clean, cheap, and statutory.

Most home contractor contracts are one or two pages drafted by the contractor or by a template that suits the contractor. The home contractor contract red flags below are the ones that move the most money and the most risk.

TL;DR

• The mechanic's lien clause lets unpaid subs and suppliers attach a lien to your home even after you have paid the general contractor in full. Counter: lien-release waivers at every payment, and a final unconditional waiver before final payment.
• Verify the license at the state board before signing. CSLB (CA), CCB (OR), TDLR (TX), DBPR (FL), DCA (NY) all maintain free databases. Unlicensed work voids most warranties and can be unenforceable.
• 10% retainage held until punch-list completion is the standard tool for keeping leverage. A "100% on signing" or "100% before substantial completion" payment schedule is a High risk flag.
• Magnuson-Moss Warranty Act (15 U.S.C. § 2301) governs full vs. limited warranty designations. A contractor who refuses to put any warranty in writing is telling you something about how the next two years will go.
• FTC Cooling-Off Rule (16 CFR Part 429) gives you 3 business days to cancel any door-to-door contract over $25 without penalty. This applies to roof, siding, and solar pitches at your front door, not to contracts you sought out yourself.

The mechanic's lien clause

Every U.S. state has a mechanic's lien statute. The mechanism is the same: a contractor, subcontractor, or material supplier who provides labor or materials to improve your property gets an automatic statutory right to file a lien if not paid. The lien attaches to the property, not to the contractor. Your check to the general contractor is not protection.

In most states, a sub or supplier must serve a Preliminary Notice within 20-45 days of starting work to preserve lien rights. If you never receive a Preliminary Notice, the sub may have lost lien rights. If you do receive one, list every party and demand a lien-release waiver from each at every progress payment.

Two waiver forms matter:

CONDITIONAL WAIVER (signed when payment is promised but not cleared)
UNCONDITIONAL WAIVER (signed after payment has cleared)

Standard practice: ask for conditional waivers before issuing each progress payment, and unconditional waivers before final payment. Statutory forms exist in CA, FL, TX, GA, AZ, and many other states. Your contractor must collect them from each sub and supplier.

If your contract has a flat "Owner waives lien rights" clause, that is unenforceable in most states because it preempts the underlying lien statute. But the inverse clause is the dangerous one: the contractor's "Owner agrees to indemnify Contractor for any liens filed by subcontractors" shifts the cost back to you. Strike or rewrite.

License verification

A license check takes 90 seconds. Most homeowners skip it. Most contractor disputes start with a name on a contract that does not match the license database.

State licensing boards are public:

• California: CSLB (Contractors State License Board)
• Oregon: CCB (Construction Contractors Board)
• Texas: TDLR for electrical/HVAC/plumbing only; general contractors are county-licensed
• Florida: DBPR (Department of Business and Professional Regulation)
• Washington: L&I (Labor & Industries)
• New York: DCA (Department of Consumer Affairs) for NYC; statewide is patchwork
• Illinois: roofing-only state license; general contracting is municipal

Check three things at the database:

1. License is active and unexpired for the relevant trade. A "B-General" license does not authorize roofing in CA without the C-39 endorsement. Trade scope mismatches void the license for that work.

2. Bond is in force. Most states require a $5,000-$25,000 bond. The bond is your remedy if the contractor abandons. A lapsed bond is a tell.

3. Workers' comp is in force. If the contractor has employees and no comp coverage, an injured worker on your property can sue you directly under most state homeowner-liability rules.

Unlicensed work is High risk in every state. In CA, an unlicensed contractor is barred from suing for payment under Bus. & Prof. Code § 7031, and the homeowner can recover all amounts paid. Most states have similar statutes.

Scope-of-work specificity and change orders

The single biggest source of mid-project disputes is a vague scope. "Kitchen remodel including cabinets, counters, and appliances" is not a scope. A scope reads:

Demolition: remove existing 36" sink-base cabinet, granite countertop
(approx. 8 LF), and tile backsplash. Disposal included.

Installation: install Owner-supplied 42" sink-base cabinet, fabricate
and install quartz countertop (Caesarstone "Frosty Carrina"
or equivalent, approx. 8 LF, 3cm thickness, eased edge), and 4x12
ceramic subway tile backsplash, color TBD by Owner.

Specificity is leverage. A scope that names brand, dimension, edge, color, and inclusion controls every subsequent dispute about "what was agreed."

Change orders are the second mechanism. Every contract should require change orders to be:

• In writing, signed by both parties before work begins
• Itemized with material cost, labor cost, and timeline impact
• Numbered sequentially

A clause that allows verbal change orders, or that lets the contractor invoice for changes "discovered during the course of work," is the mechanism by which a $40,000 remodel becomes a $73,000 invoice. See payment terms in contracts for the parallel pattern in vendor agreements.

Payment schedule and the 10% retainage rule

Standard residential payment schedules look like:

• 10% deposit on signing (CA caps at 10% or $1,000, whichever is less, under Bus. & Prof. Code § 7159)
• Progress payments tied to verifiable milestones such as rough framing complete, drywall complete, mechanical inspection passed
• 10% retainage withheld at every progress payment, held until final punch-list is complete and signed off

10% retainage is the single most useful leverage point in a residential contract. It compounds across milestones: at substantial completion you typically hold ~10% of the total contract value. That is the carrot that gets the tile guy back to grout the corners, the painter back to fix the drips, and the cabinet installer back to adjust the doors.

A High risk payment schedule:

• Anything over 10% as a deposit, with the exception of states like AZ where 50% deposits are conventional for custom builds
• Front-loaded milestones ("60% on rough framing, 35% on drywall, 5% final") that pay out the work before the contractor has completed it
• "Pay-when-paid" sub clauses that condition sub payments on the GC receiving owner payment, but quietly contain no parallel obligation on the GC

Warranty terms (Magnuson-Moss)

Federal law requires warranties on consumer products to be designated Full or Limited under the Magnuson-Moss Warranty Act, 15 U.S.C. § 2301 et seq. Construction-services warranties are governed by state law, but most reputable contractors offer:

• 1-year workmanship warranty as standard
• Manufacturer's warranties on materials passed through to the homeowner
• 2-year systems warranty on electrical and plumbing if the contractor self-performs
• 10-year structural warranty in most state new-home statutes

A contract that says "All warranties expressly disclaimed" or "AS-IS" on a remodel is a contractor advertising that they will not stand behind the work. Any state that follows the Uniform Commercial Code on materials embedded in services has implied warranties of habitability and merchantability that survive disclaimer in many fact patterns, but litigating implied warranties is expensive. Get the express warranty in writing.

FTC Cooling-Off Rule for door-to-door pitches

If the contractor came to your door, the federal FTC Cooling-Off Rule (16 CFR Part 429) gives you 3 business days to cancel without penalty. This applies to:

• Sales of $25 or more at home, and sales of $130 or more at any temporary location that is not the seller's permanent place of business
• Door-to-door, parking-lot, fairground, hotel-room, restaurant pitches
• The contractor must give you a written Notice of Cancellation form and oral notice of the right at signing

Three big exemptions:

• Sales made entirely by mail or telephone
• Sales required to repair an emergency, though most states' "emergency repair" exemptions are narrow
• Sales for real estate, insurance, or securities

If the contractor knocked, pitched, and signed at your kitchen table, you have 3 business days. Use them. Solar in particular relies on the door-to-door pattern.

Dispute resolution and arbitration

Most contractor contracts include a binding arbitration clause. Some go further with a class-action waiver. Counter-moves:

• Carve out small-claims jurisdiction. Most state arbitration laws permit small-claims-court access regardless of the arbitration clause.
• Specify AAA Construction Industry Rules rather than the contractor's preferred arbitrator. The AAA rules require disclosure of arbitrator-contractor relationships.
• Strike pre-dispute jury waivers if your state allows. CA, MO, NY do not enforce them.

For the broader boilerplate clause framework that arbitration clauses fit into, see the cornerstone post.

Red flags before signing

A pre-signing checklist:

• License number listed on the contract matches the active license at the state board
• Bond and workers' comp coverage are current
• Scope of work names brand, model, dimension, finish for every material
• Payment schedule maxes out at 10% deposit, with 10% retainage at every milestone
• Mechanic's lien language allows lien-release waivers at every payment
• Change-order clause requires written, itemized, numbered change orders before work begins
• Workmanship warranty in writing, minimum 1 year
• Arbitration clause carves out small claims and names AAA Construction Industry Rules
• If the pitch came at your door, the FTC Notice of Cancellation form is attached and dated

The shape underneath every contractor contract is the same. The contractor wrote it, the contractor's lawyer reviewed it, and your only leverage is in the spaces where the contract is silent. The mechanic's lien is the highest-stakes silence in the room. Reading it before signing is the difference between a $40,000 remodel and a $40,000 lien.

Redline reads home-improvement contracts in plain English. Photograph the contract, paste in the payment schedule, or upload the warranty section, and Redline flags the lien clause, the change-order procedure, and any FTC Cooling-Off violations in seconds. One scan, one dollar. Available on iOS and Android.