To make a construction contract that holds up, put every promise in writing before work starts: identify the parties by their exact legal names, describe the work and materials in detail, tie payments to completed milestones, address insurance, delays, change orders, liens, warranties, termination, and dispute resolution, and sign the document with the right authority on both sides. The sections below walk through each piece in the order you’d assemble it.
Name the Parties Correctly
Start with the correct legal names. For the contractor, use the business name exactly as registered with the state, whether that’s a corporation, LLC, or sole proprietorship. For the owner, use the name on the property deed. If you end up in court over defective work and the contract names the wrong entity, you may have no one to collect from.
List the full physical address where work will happen. For undeveloped land, include the parcel number from the county assessor’s records. Multiple structures or lots get spelled out individually.
Verify the contractor’s license before you finalize anything. Most states require some form of contractor licensing, and many maintain online lookup tools tied to the license number. Confirming an active license also lets you check for past complaints or disciplinary actions. A contractor working without proper credentials may void your ability to enforce warranty claims or pursue remedies through a state licensing board.
Write a Scope of Work That Leaves No Room for Interpretation
The scope of work is where most disputes are born. “Remodel kitchen” invites arguments about what’s included. Specify the actual work: demolishing existing cabinets, installing new custom cabinetry in maple, running a dedicated 20-amp circuit for the refrigerator. The more granular you get, the fewer surprises you’ll face.
Name specific materials, including brands, model numbers, grades, and finishes. If you want a particular tile or lumber species, it goes in the contract or in a detailed exhibit attached to it. This prevents the contractor from substituting cheaper alternatives and claiming they met the contract. Where exact products may become unavailable, include language requiring your written approval before any substitution.
For larger projects, the scope typically lives in a separate exhibit or set of construction drawings incorporated by reference. The contract itself contains a summary and points to the exhibit for full specifications. Both documents should be signed and dated so there’s no question about which version governs.
Set the Price and Payment Schedule
State either a fixed total price or a cost-plus arrangement where you pay actual costs plus an agreed fee or percentage. Fixed-price contracts are simpler and shift cost-overrun risk to the contractor. Cost-plus contracts give you more flexibility but require detailed record-keeping and often a guaranteed maximum price cap to prevent runaway costs.
Many states have consumer protection laws limiting how large an upfront deposit a contractor can collect. These caps vary and are worth researching for your jurisdiction before signing. Whatever the legal limit, tie all remaining payments to completed milestones. A typical schedule releases money when the foundation passes inspection, after framing, after rough mechanical systems are approved, and a final payment at completion. Never pay ahead of the work.
Retainage is the portion of each progress payment you hold back until the project is fully complete, typically 5% to 10% of each payment. That withheld money gives the contractor a financial incentive to finish punch list items and correct defects. The contract should state the retainage percentage and the specific conditions for its release, such as final inspection approval and delivery of all lien waivers.
Require Insurance and, on Larger Jobs, Bonds
Require general liability insurance before work begins. Coverage limits of $1,000,000 per occurrence are a common baseline for residential and light commercial work, though larger projects often call for higher limits. Ask for a certificate of insurance naming you as an additional insured, which gives you direct notification if the policy lapses.
Workers’ compensation insurance protects you from liability if a worker is injured on your property. If the contractor has employees and no workers’ compensation coverage, you could be on the hook for medical bills and lost wages. List the policy numbers and coverage limits in the contract or an insurance exhibit.
For larger projects, consider requiring performance and payment bonds. A performance bond guarantees the contractor will finish the work according to the contract; if they default, the surety company finances completion or hires a replacement. A payment bond guarantees that subcontractors and material suppliers get paid, which shields you from mechanics’ lien claims filed by people you never hired directly.
Lock Down the Timeline and Delay Rules
Set a firm start date and a projected substantial completion date. Substantial completion is the point where you can use the space for its intended purpose, even if minor details remain. Include a separate deadline for punch list work, typically 30 to 60 days after substantial completion.
Delays are inevitable, but the contract should distinguish excusable ones from ones that trigger consequences. Weather events, material shortages, and government-ordered shutdowns usually qualify for automatic time extensions. Delays caused by the contractor’s mismanagement do not. Spell out the process for requesting an extension: written notice within a set number of days, documentation of the cause, and your written approval.
Liquidated damages are a pre-agreed daily charge the contractor owes for each day past the deadline. The amount should reflect your actual anticipated losses, including extended rental costs, storage fees, or lost rental income. Courts won’t enforce a figure that looks like a punishment rather than a reasonable estimate of real harm, so base the number on documented costs and keep your calculations on file.
Control Change Orders Before They Blow the Budget
Work rarely proceeds exactly as designed. Change orders are the formal mechanism for modifying scope after signing. Every change order should be in writing and signed by both parties before the new work begins. It must describe what’s changing, the cost impact, and any schedule adjustment. Without this discipline, you’ll argue later about whether extra work was “included” or an unauthorized add-on.
A contractor who starts extra work before you’ve signed a change order may present you with a bill you never approved. The contract should state clearly that no additional compensation is owed for work performed without a signed change order. That one clause can save you thousands.
On projects lasting more than a few months, consider a material price escalation clause. These provisions address what happens when lumber, steel, or other key materials spike between signing and purchase. A common approach sets a threshold, such as 5% above the original line-item estimate, and makes the owner responsible for costs beyond that threshold. Without an escalation clause in a volatile market, a fixed-price contractor may cut corners on materials to protect their margin, or you may face a stalled project and a renegotiation you didn’t plan for.
Protect Yourself from Mechanics’ Liens
A mechanics’ lien allows anyone who contributed labor or materials, including subcontractors and suppliers you’ve never met, to place a claim against your property if they aren’t paid. The contract should build in several layers of protection.
Require a lien waiver with every progress payment. A conditional waiver takes effect only after the contractor’s check clears. An unconditional waiver takes effect immediately upon signing. The safest practice is to collect conditional waivers at the time of each payment and unconditional waivers confirming the previous payment was received. That paper trail proves payments were made and accepted.
Before you release final payment, require a sworn affidavit listing every subcontractor and supplier on the project and confirming they’ve been paid. This makes the contractor personally accountable for any outstanding debts to their team. Pair it with an unconditional final lien waiver, and you’ve closed the loop on potential lien exposure.
Spell Out the Warranty
Include an express warranty covering both workmanship and materials. Most standard industry forms include a callback warranty lasting one year from substantial completion, during which the contractor must return and fix any defects at no charge. A broader workmanship warranty, guaranteeing the work conforms to contract specifications, often has no explicit time limit and remains enforceable until the statute of limitations or statute of repose runs out.
Manufacturer warranties on installed equipment like HVAC systems, roofing materials, and appliances are separate from the contractor’s warranty. The contract should require the contractor to pass through all manufacturer warranties to you, including registration paperwork. A new furnace with a 10-year manufacturer warranty does you no good if the contractor never registered it in your name.
Build In Termination Rights
Both sides need a way out. The contract should address two kinds of termination.
Termination for cause lets you end the contract when the contractor commits a material breach: abandoning the project, consistently failing inspections, falling dangerously behind schedule, or losing their license or insurance. Before termination, the contract should require written notice describing the breach and a cure period, typically 10 days or more. If the contractor doesn’t cure the problem within that window, you can terminate and hire someone else. The defaulting contractor is generally liable for the additional cost of completion.
Termination for convenience lets either party walk away without fault, though the terminating party owes compensation for work completed, materials already purchased, and sometimes a portion of lost profit. Without this clause, ending a contract with a contractor who’s technically performing but whom you’ve lost confidence in may require you to prove a breach you can’t document.
Pick a Dispute Resolution Path and Governing Law
Decide how you’ll resolve disagreements before one arises. The three main options are negotiation, mediation, and arbitration. Many contracts require the parties to attempt mediation first and move to binding arbitration if mediation fails. Arbitration through a provider like the American Arbitration Association is faster and more private than court litigation but typically limits your right to appeal.1American Arbitration Association. AAA Arbitration Services – Professional Dispute Resolution
Name the governing law, meaning the state whose statutes control any legal interpretation. This is almost always the state where the project is located. If you’re hiring an out-of-state contractor, this clause prevents them from arguing the contract should be interpreted under their home state’s laws.
Assign Permits, Inspections, and Fees
Any project of meaningful scope requires building permits, and the contract needs to say who’s responsible. In most cases the contractor pulls the permits because they’re performing the regulated work, but the owner typically pays the fees. Make this explicit. If the contractor starts without permits and the building department issues a stop-work order, you’ll lose weeks and possibly face fines.
Permit fees vary widely depending on project value and jurisdiction. Some localities impose separate impact fees for infrastructure, schools, or environmental review. State whether these costs are included in the contract price or billed separately. The same goes for required inspections at each phase. Your contractor should coordinate inspections, and the contract should confirm that obligation in writing.
Handle 1099 Reporting if the Property Is Business-Related
If you pay a contractor $600 or more during the year for work on a property used in your trade or business, you’re required to file Form 1099-NEC with the IRS reporting those payments.2Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC Collect a completed Form W-9 from the contractor before the first payment. The W-9 gives you their taxpayer identification number, which you need for the 1099. If the contractor refuses to provide a W-9, you may be required to withhold a percentage of each payment for backup withholding and remit it to the IRS.3Internal Revenue Service. Form W-9 Request for Taxpayer Identification Number and Certification
The 1099-NEC requirement applies to payments made in connection with a trade or business. If you’re hiring a contractor to renovate a personal residence and you’re not a landlord or business owner, the filing requirement generally doesn’t apply. If the property is a rental, a business location, or a flip, you need to report those payments.
Start From a Standardized Template
You don’t have to draft from scratch. The American Institute of Architects publishes a widely used family of contract documents.4AIA Contract Documents. AIA Contract Documents – The Industry Standard for Construction Documents The AIA A101 is the standard owner-contractor agreement for fixed-price (stipulated sum) projects. For cost-plus arrangements, the AIA A102 and A133 forms are common alternatives. The Associated General Contractors of America publishes its own set of standard forms.
These templates come with pre-built sections for everything above: party identification, scope, contract sum, progress payments, insurance and bonds, time of completion, changes, dispute resolution, and termination. You fill in the project-specific details and modify the standard language where needed. Using a recognized template also builds credibility with lenders, inspectors, and potential litigants familiar with the structure.
One caution: standardized forms are designed to be balanced. Contractors and owners both attempt to modify them in their favor. Read every clause, including the boilerplate, and understand what you’re agreeing to. An architect or construction attorney can review modifications and flag provisions that shift risk unfairly.
Sign With Authority and Keep the Records
The contract must be signed by someone with authority to bind each party. For an individual homeowner, that’s straightforward. For a business entity, confirm that the signer has actual authorization, whether from a corporate resolution, operating agreement, or partnership authorization. A contract signed by someone without authority may not be enforceable against the entity.
Notarizing the signatures adds a layer of authentication that discourages later claims of forgery. Notary fees for a standard acknowledgment typically run between $2 and $15 per signature, depending on the state. Electronic signatures are equally valid under federal law, which provides that a contract cannot be denied legal effect solely because it was formed using electronic signatures.5Office of the Law Revision Counsel. 15 USC Chapter 96 – Electronic Signatures in Global and National Commerce
Both parties should keep an original or high-quality digital copy of the fully executed contract, including all exhibits, drawings, and insurance certificates. You’ll need these records for tax purposes, insurance claims, and potential disputes. Over 30 states have statutes of repose that set an outer deadline for filing construction defect claims, and those periods commonly range from six to ten years after completion.6Associated General Contractors of America. Statute of Repose Store your documents at least that long. A contract you can’t find is a contract you can’t enforce.