What Should Be in a Home Improvement Contract?

Most home improvement disputes are not really disputes about workmanship. They are disputes about what was agreed. One party remembers the price including the haul-away, the other remembers it as extra. One expected the job finished before the holidays, the other never committed to a date. Nobody is necessarily lying. The contract simply never said.

A good contract is not there to win a lawsuit. It is there to make the argument unnecessary. Here is what belongs in one.

The Non-Negotiable Basics

Before anything else, confirm the contract contains:

Full legal names and contact details for both the contractor and you, plus the contractor license number where the state requires it.
The property address where the work will be performed.
Signatures and dates from both parties, applied before any work starts and before you pay anything.

If the document you have been handed is missing any of this, it is a quote, not a contract.

A Scope of Work Specific Enough to Argue With

This is the heart of the contract and the section most often written too loosely. Vague scope is where money leaks.

The scope should state what will be done, in what sequence, using which materials, specified by brand, model, grade, color, and quantity wherever it matters. The difference between mid-grade and premium shingles, or between pressure-treated pine and cedar, is thousands of dollars, and if the contract says only shingles then you have agreed to whatever arrives.

Equally important is what is excluded. Explicitly address:

Debris removal and disposal, including who pays dump fees.
Site protection, such as covering landscaping or flooring on the route to the work area.
Daily cleanup and the condition the site is left in.
Existing damage discovered mid-job, such as rot found once a wall or deck is opened. Say how it will be priced when it is found, because it frequently is.
Which fixtures or materials you are supplying, if any, and who is responsible if they arrive damaged.

A useful test: could a different contractor read this scope and produce the same job? If not, it is too vague.

Price, Payment Schedule, and Retainage

The contract must state the total price and whether it is fixed, cost-plus, or an estimate with a not-to-exceed ceiling. These are very different arrangements and homeowners often do not realize which one they have signed.

Then set out the payment schedule. Tie payments to verifiable milestones rather than calendar dates, so you are paying for completed work rather than elapsed time. And state the retainage explicitly: the 10% to 15% you hold until the punch list is closed and the site is clean.

Also record the deposit amount. Several states cap what a contractor may collect before starting work, so check your state licensing board rather than assuming the number offered is lawful.

Start Date, Completion Date, and What Happens If They Slip

Vague timeframes are among the most common complaints homeowners have, and they are entirely avoidable in writing.

Include:

A start date and a substantial completion date, both as actual dates.
Milestone dates for the phases that matter to you, particularly any that affect whether you can live in the house.
Excusable delays, defined narrowly. Weather, permit backlogs, and supply chain failures are legitimate. The contractor taking another job is not.
A remedy if the schedule slips badly. This can be a modest per-day credit, or a right to terminate and pay only for work completed. Even a small stated consequence changes behavior.

Change Orders in Writing, Always

If you take one thing from this article, take this: no verbal change orders, ever.

A change order is a written document, signed by both parties before the extra work begins, that records three things:

What the change is, described as specifically as the original scope.

What it costs, as an addition to or subtraction from the contract price.

How it affects the schedule and the payment milestones.

Verbal change orders are the single most reliable source of home improvement disputes. The pattern is always the same. Something is discussed on site, the contractor proceeds in good faith, and the cost appears on the final invoice at a number the homeowner never agreed to. Both parties feel wronged, and neither can prove anything.

Write into the contract that no change is authorized and no additional payment is owed unless a written change order is signed first. Then hold to it, including when it is inconvenient and the crew is standing there waiting. Five minutes with a phone and a signature is cheap.

Insurance, Permits, and Lien Protection

Three clauses that carry more weight than their length suggests:

Insurance. The contract should require the contractor to maintain general liability and workers compensation for the duration, and to provide certificates. A general liability minimum around $500,000 is a common residential baseline, with $1 million typical for structural work.
Permits. State who obtains and pays for permits. This should almost always be the contractor. A contractor who asks you to pull the permit may be avoiding scrutiny of their license, and it shifts responsibility for code compliance onto you.
Lien waivers. Require a signed lien waiver from the contractor with each payment, and from major subcontractors and suppliers before final payment. If a subcontractor goes unpaid by your contractor, they can file a lien against your home even though you paid in full. Lien waivers are the standard defense.

Warranty and Dispute Resolution

Specify the workmanship warranty and its length, typically one to two years for residential work, and make clear it is separate from the manufacturer warranty on materials. State what a warranty call requires and how quickly the contractor will respond.

Add a dispute resolution clause naming mediation as a first step before arbitration or litigation. Mediation is faster and dramatically cheaper, and simply having the clause tends to make people negotiate.

Read any arbitration clause carefully before signing. Binding arbitration can waive your right to go to court, and the terms are not always in your favor.

Things to Refuse to Sign

A blank or partially completed contract, to be filled in later.
Any document requiring full payment before work begins.
A contract with no completion date.
Scope written as a single sentence on a job worth thousands.
A clause waiving your right to file a complaint with the licensing board.
Anything you are being pressured to sign immediately. Take it away and read it. A contractor who will not allow that has told you what you needed to know.

Frequently Asked Questions

Can I use a template contract I found online?

As a starting point and a checklist, yes. As the final document, be careful. Home improvement contracts are governed by state law, and several states mandate specific content, including notice of your cancellation rights, license disclosures, and limits on down payments, sometimes in prescribed wording and type size. A generic template will not contain those, and a contract missing mandatory provisions can be unenforceable or expose the contractor to penalties. The practical approach is to use a template to understand what should be covered, then work from the contractor's own contract, which is usually built to state requirements, and negotiate the specific clauses discussed above into it.

What if the contractor refuses to change the contract?

Distinguish between a contractor protecting a sensible standard term and one refusing all accountability. Pushback on a large late-completion penalty is reasonable. Refusing to put the scope in writing, to specify materials, to accept a written change order requirement, or to provide lien waivers is not, because none of those cost an honest contractor anything. If the refusals cluster around documentation and accountability rather than money, that is the signal. You are not obliged to sign, and the leverage you have before signing is the most you will ever have.

Do small jobs need a written contract too?

Yes, though the document can be proportionate. A one-page written agreement covering scope, materials, price, payment terms, dates, and warranty is enough for a small repair, and takes a few minutes. Many states in fact require a written contract above a fairly low dollar threshold, sometimes only a few hundred dollars. The risk on small jobs is not usually catastrophic loss, it is scope creep, where a modest repair grows through a series of verbal agreements into a bill several times the original quote. A short written scope prevents exactly that.

Start With Quotes That Are Actually Comparable

A good contract begins with a clear quote. When contractors respond to the same detailed project description, their scopes line up and the differences between them become visible, which is what makes negotiation possible.

On Win My Work you describe your project once, including photos and property details, and receive competitive quotes from verified, licensed and insured local contractors working from identical information. Take the quote you like into the contract checklist above.