Construcción

Construction Contract Between Homeowner and Contractor: What It Must Include to Protect You

Most remodeling disputes that end up in small claims court or contractor licensing board complaints share one thing: a vague or missing written contract. The homeowner remembers one price; the contractor remembers another. The scope was "understood" but not written down. The timeline was discussed but never specified.

A construction contract doesn't need to be long or complicated. A clear two-page document signed by both parties eliminates most of the disputes before they start — and wins most of the ones that do arise.

Is a written contract required by law?

Yes, in most states, for work above a threshold amount.

Most states with contractor licensing laws require written contracts for home improvement work above certain dollar amounts ($500–$1,000 in most states). California law (CSLB), for example, requires a written contract for any home improvement project over $500.

Even where not legally required, oral contracts are nearly impossible to enforce when details are disputed. A signed written contract is your primary legal protection.

What a construction contract must include

1. Parties and their information

Full legal names of the homeowner and contractor. Contractor's business name, contractor's license number, and business address. Property address where work will be performed.

2. Detailed scope of work

This is the most important and most often vague section. Do not write "bathroom remodel." Write what will actually happen:

Which walls are being removed or added.
What fixtures are being installed and who supplies them.
What materials will be used (brands, models, or specifications for tile, fixtures, lumber grade, etc.).
What is explicitly not included in this contract.

A detailed estimate attached by reference works: "The scope of work is as described in the attached estimate dated [date], which is incorporated into this contract."

3. Contract price and payment schedule

The total contract amount, with clear statement of whether it includes or excludes taxes (sales tax on materials, where applicable). Never leave the price as "to be determined" — either it's a fixed-price contract or a time-and-materials contract with clear rates and maximums.

Payment schedule tied to verifiable milestones:

Deposit amount (check your state's legal limit on deposits — California caps at 10% or $1,000).
Progress payment at specific milestone.
Final payment at completion and acceptance.

Include accepted payment methods. Do not include a clause that makes final payment contingent on client "satisfaction" — this is too subjective. Final payment should be tied to completion of a defined punch list.

4. Start date and completion schedule

Anticipated start date and estimated completion date. Include language covering delays beyond the contractor's control (material availability, weather, additional work requested by owner, permit delays) and how those affect the timeline.

Never promise a firm completion date if the project has variables outside your control — but do give a realistic estimate and commit to communication if it changes.

5. Change orders

One of the most common sources of contractor-homeowner disputes. The contract must state:

Any change to the scope, materials, or timeline must be in a written change order.
Change orders require signature from both parties before the additional work begins.
Change orders specify the additional cost and any timeline impact.

Do not do verbal change orders. They are the root cause of most "he said she said" billing disputes.

6. Materials and allowances

Specify who provides materials — contractor, homeowner, or split. If owner-supplied materials are involved, note that delays in delivery affect the project timeline.

If certain items are left as "allowances" (a budget placeholder for items not yet selected), make that explicit and define what happens if the selected items cost more or less than the allowance.

7. Permits and inspections

Who is responsible for pulling permits? (Usually the contractor for licensed work.) Who pays for permits? (Usually included in the contract price or listed separately.) Note that work must pass required inspections before being covered up or finalized.

8. Warranties

State law provides minimum implied warranties on construction work, but specify what you're offering:

Workmanship warranty: typically 1 year on labor.
Material warranties: pass through manufacturer warranties to the client.
What voids the warranty (client modifications, improper maintenance).

9. Insurance

State in the contract that the contractor carries general liability insurance and (if applicable) workers' compensation. Homeowner can request a certificate of insurance before work begins — this is standard and professional contractors have no problem providing it.

10. Dispute resolution

In case of disagreement, the process: first, written notice of the dispute; then good-faith negotiation; then mediation; then binding arbitration or court (specify which and where). Note which state's laws govern the contract.

Home improvement contract laws by state

Laws regulating home improvement contracts vary. A few examples:

California: written contract required over $500, specific required clauses, deposit limits, 3-day cancellation right for unsolicited contracts.
New York: written contract required for work over $500, specific disclosure requirements.
Florida: written contract required over $2,500, lien law disclosure is mandatory.
Texas: no statewide home improvement contract law, but contractor's license requirements apply.

Search "[your state] home improvement contract requirements" for specifics.

The estimate as a contract

A detailed, signed estimate with payment terms attached covers most of the same ground as a formal contract for typical residential work. If your estimate includes: scope, price, payment schedule, timeline, and basic conditions, the signed estimate functions as a contract.

In Presupix, you can send the estimate as a shareable link. The client reviews it in their browser, signs digitally, and you have a timestamped record of the signed agreement — no printing or scanning required.

When to involve an attorney

For projects over $25,000–$30,000, or any project with unusual risk factors (working in occupied homes, complex structural work, historic properties), having a contract reviewed by a construction attorney is a worthwhile investment. Attorney review costs $300–$600 and can save you far more in avoided disputes.