Write the scope before you call anyone
The reason bids are hard to compare is that most homeowners describe the job verbally and differently to each bidder. One assumes you are keeping the existing subfloor, one has priced replacing it. One includes hauling debris, one does not. One is quoting a mid-grade fixture, one a builder-grade one. The three numbers then have no relationship to each other, and the lowest wins on a comparison that was never valid.
The fix is a single written scope that goes to everyone unchanged. It does not need to be a professional specification. It needs to answer the questions that otherwise get answered silently.
| Put in the scope | Because otherwise |
|---|---|
| Exactly what is being removed, and who hauls it away | Demolition and disposal is a real line item and it is the easiest one to leave out of a low bid |
| Dimensions and quantities you measured yourself | Bids priced off different areas are not comparable at all |
| Materials by grade or by specific product, and who supplies them | "Tile" spans an enormous price range. Say which, or say the allowance amount. |
| Allowances for anything not yet chosen, stated as a dollar figure | An unstated allowance is where a bid gets quietly low and a final invoice gets high |
| Whether permits are expected, and who pulls them | Permit requirements are set locally and vary; say who is responsible rather than assuming |
| Working hours, access, parking, pets and children in the house | These affect the price and they affect whether the job is pleasant |
| What "done" means — the punch list standard, and final cleanup | The last five percent of a job is where most disputes happen |
Take your own photographs and measurements before anyone visits. It means you can check a bid's quantities against something.
Three real bids, and reading the spread
Three is the working number: two gives you no sense of the middle, and more than four is diminishing returns on your time. What makes them useful is that all three saw the same document and all three itemized. Ask for the breakdown — labor, materials, subcontracted trades, permits, disposal, contingency — rather than a single figure on a page.
| What the spread often means | How to test it |
|---|---|
| One bid far below the others | Read what it left out. Usually it is demolition, disposal, a trade that has been assumed away, a lower material grade, or a scope that stops short of finish work. Ask the low bidder directly what is excluded, and ask the high bidders what they included that others might not have. |
| A low number attached to a vague one-page quote | Vagueness is the mechanism. What is not specified becomes a change order at a price set after you are committed and the wall is open. |
| Bids clustered close together with one outlier | The cluster is usually the market. The outlier is the one to interrogate, in either direction. |
| A discount for deciding today | Legitimate contractors have backlogs and do not need a same-day close. Pressure at the kitchen table is a signal in itself. |
The lowest bid frequently is not a price, it is a strategy: get the contract at a number that wins, then recover margin through change orders once the job has started and switching contractors mid-project is impractical. That is why the scope and the change order clause matter more than the headline figure.
Verifying the company yourself
Whether a given trade needs a license, a bond, or a permit is a state and local question, and it varies enough that no general page should tell you what applies to your job. What is universal is the verification process — how you check whatever your jurisdiction requires, rather than accepting a claim.
| Check | How, specifically |
|---|---|
| Licensing | Find out from your state's licensing board or contractor registry whether the trade and the job size require a license where you are, then look the company up in that registry by license number. Verify the number belongs to the business quoting you, and that the classification covers this kind of work. |
| Insurance | Ask for a certificate of insurance, then call the insurance agency listed on it and confirm the policy is active. A certificate is a piece of paper; the phone call is the verification. Ask to be listed as a certificate holder so you are notified if it lapses. |
| Workers' compensation | Ask whether employees are covered, and what happens if a subcontractor's worker is injured on your property. This is a real exposure for a homeowner. |
| The business itself | Confirm the legal business name, address and how long it has traded under that name |
| References | Ask for recent jobs of the same type, and actually call. The useful questions are: did the final price match the bid, what changed and how was it handled, did they finish, and how did they behave when something went wrong. |
| Work in progress | Ask to see a current site. Ten minutes on an active job tells you more about cleanliness, sequencing and crew management than any review. |
Two cautions on permits, without stating what your locality requires. Permits are typically pulled in someone's name, and a contractor who asks the homeowner to pull them personally may be shifting responsibility for the work onto you — ask why before agreeing. And a contractor whose reason for skipping a permit is that it saves you money is telling you something about how the rest of the job will go. What is required where you live is a call to your local building department, which will answer for free.
What goes in writing before work starts
This is not legal drafting and this page is not the place to attempt it. It is a list of the things that, when they are missing, produce the arguments.
| Item | Note |
|---|---|
| Full legal business name, address, phone, and license number if applicable | The entity you would be dealing with if something went wrong |
| The scope, attached as the document you sent out | Referenced by the contract rather than re-summarized in it |
| Total price, and what is an allowance rather than a fixed cost | Allowances should be explicit, with the mechanism for over and under stated |
| The payment schedule, tied to milestones | See below. This is the most important clause in the document. |
| Change order procedure — written, priced and signed before the extra work happens | The single clause that prevents the most common dispute in residential work |
| Start date, expected completion, and what happens on delay | Weather and inspections cause honest delays; the clause is about communication, not penalties |
| Who is responsible for permits and inspections | Whatever your locality requires, name the responsible party |
| Warranty on workmanship, and how manufacturer warranties on materials are handed to you | Get the material documentation at the end. See warranty basics. |
| Lien-related paperwork practice | Rules here are state-specific and this page will not summarize them. Ask a local attorney or your state consumer division what applies before a large project, and ask the contractor what documentation they provide showing subcontractors and suppliers have been paid. |
Read it before signing, without the contractor waiting. If a term is described verbally and does not appear in the document, it does not exist — ask for it to be written in.
Money: never all of it, and never ahead of the work
The structural rule is that at every point in the job, the value of work completed should be at least equal to what you have paid. That principle covers most of what goes wrong financially.
A deposit before materials are ordered is normal. Paying the full amount before work starts is not, on any job, for any discount offered. In between, tie payments to milestones a non-expert can verify by looking: materials delivered to site, rough-in complete and inspected where inspections apply, drywall closed, finishes installed, punch list cleared. Hold a meaningful final payment until the punch list is genuinely done, because it is the only leverage that survives the crew leaving.
Pay by a method that leaves a record and, where practical, a dispute path — a check or a card rather than cash, and never a wire or a payment-app send to an individual. On what a payment method buys you, returns and disputes covers the reasoning.
While the job runs
Keep a single running log with dates: who was on site, what was done, what was decided, what you were told. It takes two minutes a day and it is the difference between remembering and proving. Photograph the walls before they are closed — every stud bay, every run of pipe and wire — because that record is worth having for the next twenty years regardless of how the job goes.
Handle every change the same way, however small: written, priced, signed, before the work. And raise problems early and in a low-key way — a homeowner who says nothing for six weeks and then produces a list is in a worse position than one who mentions it the day it happens.
When it goes wrong
Talk to the owner or the person who signed the contract, not the crew lead. Put it in writing with dates, amounts and a specific request. If that fails, your state's licensing board takes complaints where licensing applies, and your state attorney general's consumer division takes complaints about home improvement work generally — both are free. Small claims court handles amounts up to a limit your state sets. Beyond that, a construction or consumer attorney is the right call. Escalating a complaint covers the ladder.
If you do one thing from this page, make it the scope document. Comparable bids come from an identical description of the work, and nearly every other problem here — the change orders, the disputes about what was included, the final invoice that does not resemble the estimate — begins with three people quoting three different jobs.
Questions people ask
How many bids should I get, and why do they vary so much?
Three, from contractors who all received the same written scope. Wide variation almost always means they priced different jobs: one included demolition and disposal, one assumed you were keeping the substrate, one quoted a cheaper material grade. Ask for itemized breakdowns rather than a single number, then compare line by line. Ask the low bidder what is excluded and the high bidder what is included — that conversation usually explains the spread completely, and it often reveals that the low bid is not actually the cheapest way to finish the work.
How do I check that a contractor is licensed and insured?
Whether a license is required depends on your state, your locality and the type and size of the job, so start with your state licensing board or contractor registry to find out what applies. Then look the company up in that registry by number and confirm the number belongs to the business quoting you and covers this class of work. For insurance, ask for a certificate and then call the agency printed on it to confirm the policy is active — the certificate alone proves only that a certificate was produced. Ask to be added as a certificate holder so you hear about a lapse.
What is a reasonable deposit?
Enough to order materials and secure the schedule, and no more. Some states cap deposits on home improvement contracts and some do not, so check locally rather than relying on a rule of thumb from the internet. The principle that holds regardless: at every stage, work completed should be worth at least what you have paid. Never pay in full before work begins, whatever discount is offered, and hold a meaningful final payment until the punch list is finished and any required inspections have passed.
The contractor wants me to pull the permit myself. Should I?
Ask why before agreeing. Permitting rules are local and this page cannot tell you what yours requires, but the practical point is that whoever pulls the permit generally takes on responsibility for the work meeting requirements, and a homeowner who pulls a permit for a contractor's work may be accepting that exposure. Call your local building department — they answer this for free and they will tell you what is normal in your jurisdiction. A contractor who suggests skipping a permit entirely because it saves money has told you something about how the rest of the job will be run.
The final invoice is much higher than the bid. What can I do?
Ask for every increase to be tied to a specific signed change order, and go through them one at a time. Work done without a written, priced, signed change order is the weakest ground a contractor can stand on, which is exactly why that clause belongs in the contract before anything starts. Put your position in writing with dates and figures rather than arguing on the phone. If it does not resolve, your state licensing board and your state attorney general's consumer division both take complaints at no cost, and small claims court handles disputes up to a limit your state sets. For a large sum, an hour with a construction attorney before you escalate is money well spent.