A warranty is your promise that the work is sound, and you are bound by two kinds: the express warranty you actually wrote into the contract, and the implied warranty the law hands the customer whether you wrote one or not. The dangerous one is the implied warranty, because it exists even when your contract says nothing, and it can keep you on the hook for years after the last check cleared. Knowing what you promised, what the law promises for you, and the clock that finally ends your liability is how you stop a warranty from turning into an open-ended obligation. Here is how construction warranties actually work.
Express warranty: what you put in writing
An express warranty is a promise you made on purpose, in the contract, in a spec, or even out loud on the job. "One-year warranty on all labor," "these are 30-year shingles," "the basement will not leak," those are express warranties. They are enforceable as written, so the smart move is to write them tightly:
- Say exactly what you warrant (your workmanship) and for how long.
- Say what you do not warrant: owner-supplied materials, damage from misuse or lack of maintenance, normal wear, and problems caused by other trades.
- Do not promise more than you can stand behind. A casual "don't worry, that'll last forever" can become an express warranty you did not mean to give.
A clear express warranty is a shield, because it sets the boundaries. A vague one, or an offhand promise, is a liability.
Implied warranty: the promise the law makes for you
Even if your contract is silent, most states read an implied warranty into construction work. The two you will run into:
- Implied warranty of workmanship (or good and workmanlike manner). The law implies that you performed the work with the ordinary skill and care of a competent contractor in your trade. Build it sloppy and it fails this standard even if you never signed a warranty.
- Implied warranty of habitability. On new-home and some residential work, the law in most states implies that the finished home is fit to live in. This one most often runs to the buyer and can even reach a later buyer in some states.
The point that catches contractors out: these implied warranties exist by default. You did not offer them, but you are bound by them, and in many states a customer can sue on the implied warranty even after your express warranty period has ended.
The two clocks: how long you actually stay on the hook
Your liability does not last forever, but it lasts longer than most contractors think, and it is governed by two different clocks that both vary by state:
- Statute of limitations. The window to sue after a defect is discovered (or reasonably should have been). It starts running when the problem shows up.
- Statute of repose. The hard outer deadline measured from completion or substantial completion of the work, after which you cannot be sued at all, no matter when the defect is found. This is the one that finally closes the door.
Both lengths are set by state law and differ a lot from state to state, and the statute of repose in particular can run for many years after you finished. Do not guess how long you are exposed. Get your state's limitations and repose periods from Working in Your State, because they decide how long you should keep your job records and photos.
The call-back period is not your whole liability
Most contracts include a call-back or "correction period," commonly one year, where you agree to come back and fix defects that show up. It is a good clause and standard practice on many forms. But understand what it is and is not: the call-back period is a contract convenience that gets you first crack at fixing a problem cheaply. It is not the limit of your legal liability. A customer can still sue on the implied warranty or for breach after the call-back year ends, up to the statute of repose. Treat the call-back as a chance to fix things on your terms, not as the day your exposure ends.
Can you disclaim or limit the implied warranty?
Sometimes, and it depends heavily on your state. Some states let a contractor limit or waive the implied warranty of workmanship with clear, conspicuous, specific contract language, and some do not allow it to be waived at all, especially the warranty of habitability on new homes. A vague "no warranties" line usually will not do it. Whether you can limit implied warranties, and exactly how the language has to read to work, is a state-by-state question. Route it to Working in Your State, and do not assume a disclaimer holds until you have confirmed it does in your state.
The moves that protect you
- Write a clear express warranty with a defined term and an explicit exclusions list.
- Document your work with photos, product data, and dated records, and keep them at least as long as your state's statute of repose.
- Honor legitimate call-backs promptly. Fixing a real defect on your own dime early is almost always cheaper than a lawsuit later.
- Do not over-promise. Offhand guarantees become express warranties.
Common questions
What is the difference between an express and an implied warranty?
An express warranty is a promise you actually made in the contract, a spec, or out loud; an implied warranty is one the law imposes automatically, even if your contract says nothing. Most states imply a warranty that your work was done in a good and workmanlike manner, and on new homes a warranty that the home is habitable. The trap is that implied warranties bind you whether or not you offered them, and a customer can often sue on them even after your written warranty period ends.
How long is a contractor liable for defective work?
Two clocks control it, and both vary by state: the statute of limitations, which runs from when a defect is discovered, and the statute of repose, which is a hard outer deadline measured from when you completed the work, after which you cannot be sued at all. The statute of repose can run for many years after the job. Because both periods are set by state law and differ widely, get yours from Working in Your State, and keep your job records and photos at least that long.
Does a one-year warranty limit how long I can be sued?
No. A one-year call-back or correction period gets you first crack at fixing defects cheaply, but it does not cap your legal liability. A customer can still sue on the implied warranty or for breach of contract after the call-back year ends, up to your state's statute of repose, which is usually much longer. Treat the call-back period as a chance to fix problems on your own terms, not as the day your exposure ends.
Can I waive the implied warranty in my contract?
Sometimes, but it depends entirely on your state and on very specific contract language, and in many states the implied warranty of habitability on new homes cannot be waived at all. A vague "no warranties expressed or implied" line usually will not hold up. Where waiver is allowed, courts typically require clear, conspicuous, specific wording. Because it is a state-by-state question, confirm what your state allows in Working in Your State before you rely on a disclaimer.
The honest bit
- Statute of limitations and statute of repose lengths, whether implied warranties can be disclaimed, and any new-home warranty statutes are all state-specific and vary widely. Route them to Working in Your State.
- The one-year call-back period is a common standard-form contract term, not a legal deadline, and it does not end your liability. Verify current standard-form practice at build.
- This is general guidance, not legal advice. For a serious defect claim, a construction-defect dispute, or before you write a warranty disclaimer into your standard contract, talk to a construction attorney licensed in your state.
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