How to Read a Contractor's Estimate
Why this matters
The number at the bottom of an estimate is the least informative line on it. What you are really buying is the list of things above that number, and the list of things the shop wrote down that it will not do. Most disagreements at the end of a job ("I thought that was included") trace back to a line that was on the estimate the whole time and nobody read.
This card walks through a typical written estimate section by section, says what each part commits the contractor to and what it commits you to, shows how an allowance turns into a different final bill, and ends with the questions worth asking before you sign.
A sample estimate, marked up
Here is a simplified estimate for a small bathroom update. Real ones are longer, but almost every estimate from any trade has these same parts in some order. The prices are left as placeholders; what matters is where each piece sits.
ESTIMATE No. 2417 Date issued: March 4
Valid until: April 3 (30 days) <- [A]
---------------------------------------------------
SCOPE OF WORK <- [B]
1 Remove and haul away tub, surround,
vanity, toilet. Protect hall floor.
2 Replace drain and supply valve for tub.
3 Install acrylic tub and 3-wall surround.
4 Install customer-selected vanity, top,
faucet and toilet.
MATERIALS <- [C]
Tub: 60 in acrylic, left drain, or equal
ALLOWANCES <- [D]
Vanity, top and faucet ......... ALLOW A1
Toilet ......................... ALLOW A2
PERMIT Plumbing permit pulled by us,
fee included <- [E]
EXCLUSIONS <- [F]
Rot or subfloor repair found on removal
Painting, electrical, mold remediation
PAYMENT 20% at signing <- [G]
50% when tub and surround set
30% on completion and final OK
WARRANTY Labor 1 year from completion.
Products per manufacturer. <- [H]
SIGNATURE ____________ Date ________
The letters match the sections below.
[A] The date and the expiration
An estimate is priced on the day it was written: the shop's material costs, its schedule, and its read of your house that day. The "valid until" line is the shop telling you how long it will hold that price. Thirty days is a common window; some trades with volatile material prices (copper, lumber, equipment with frequent price changes) write shorter ones.
After that date the shop is free to reprice. That does not mean it will, but if you sign on day 45, ask in writing whether the price still stands before anyone orders material. If a start date is written on the estimate, read it as a target unless the document says it is a promise, and ask what happens if it slips in either direction.
[B] Scope of work: the part you are actually buying
The scope is the list of tasks the contractor is agreeing to do. Anything not in the scope is not included, even if it seems obvious. Read each line as literally as a stranger would.
Look for three things:
- Verbs. "Remove", "install", "replace", "repair", "haul away" and "protect" are each a separate commitment. "Install toilet" without "remove and haul away old toilet" can mean the old one stays on your curb.
- Who supplies what. "Install customer-selected vanity" means you pick it, and depending on the wording you may also be buying it and having it delivered. If the estimate does not say who orders a part, ask.
- The finish line. Does "install surround" include sealing and caulking? Does "remove tub" include patching the wall where it came out? The scope should end where you expect the job to end.
[C] Materials and "or equal"
The materials section says what goes into the job. Specific is better: a size, a type, a rating. "Or equal" means the shop may substitute a product it considers equivalent. That is normal and often unavoidable (a supplier runs out), but it gives the shop the judgment call. If one feature matters to you, such as a left-hand drain, a particular finish or a specific efficiency rating, ask for that feature to be written into the line so that "equal" has to include it.
[D] Allowances: the line that changes your final bill
An allowance is a budget amount the contractor puts in for something you have not chosen yet. It is not a price for a specific item. It is a placeholder, and the final bill moves up or down depending on what you actually pick.
Most allowance clauses work like this: if your selection costs less than the allowance, the difference comes off the bill; if it costs more, you pay the difference. Some contracts add the shop's markup or a handling charge on the amount over the allowance. Whether that markup applies, and at what rate, should be written on the estimate. If it is not, ask before you sign.
Worked example. Say the whole contract price is your baseline, 100 percent. The vanity, top and faucet allowance (A1) is 8 percent of that price. You visit the showroom and choose a set that costs one and a half times the allowance.
- Your selection: 1.5 x 8 percent = 12 percent of the contract price.
- Overage: 12 minus 8 = 4 percent of the contract price.
- The contract says overages carry a 10 percent markup: 4 x 0.10 = 0.4 percent.
- Total added to your bill: 4 + 0.4 = 4.4 percent of the original contract price.
Check it the other way: 12 percent of selection plus 0.4 percent of markup is 12.4 percent spent on that line, against the 8 percent the estimate carried, and 12.4 minus 8 is 4.4. The two directions agree.
Now the toilet allowance (A2) is 2 percent and you pick one at 1.5 percent. That line comes in 0.5 percent under, so the final bill drops by 0.5 percent, assuming the contract credits savings back (most do; confirm yours does). Net change across both allowances: 4.4 minus 0.5 = 3.9 percent over the signed price, without anything going wrong on the job.
What would change this. A contract that applies markup to the whole selected price rather than only to the overage would add 10 percent of 12, which is 1.2 percent, instead of 0.4. And an allowance written deliberately low makes the estimate look smaller than the job will be. If an allowance seems thin for what you want, ask the shop what it typically covers and price a real item before signing.
[E] The permit line
A permit line should answer two questions: is a permit required for this work, and who pulls it? "Permit pulled by us, fee included" is the clearest version. "Permit by owner" or no permit line at all on work that usually needs one deserves a question, because the person who pulls the permit is generally the one responsible to the building department for the inspection. What a permit protects and why it matters to you is covered in What a Permit Means for You as the Homeowner.
[F] Exclusions: what the shop is telling you it will not do
Exclusions are the shop being honest about the edge of the job. Read them as seriously as the scope.
Exclusions that describe hidden conditions ("rot or subfloor repair found on removal") are normal, because nobody can see under a tub before it comes out. The question to ask is how a hidden condition will be priced if it shows up: a written change order before the work continues, at what rate, and whether the shop will stop and show you first. See related: How to Read and Approve a Change Order.
Exclusions that describe other trades ("electrical, painting") tell you to plan for someone else. If the new vanity needs a light moved and electrical is excluded, that is a second contractor and a second schedule.
[G] The payment schedule
The schedule says when you pay and what has to happen first. A schedule tied to visible milestones ("when tub and surround set") is easier to verify than one tied to dates. Look for a final payment held until the work is complete and you have walked it. How large a first payment is reasonable, why some states cap deposits, and how lien waivers protect you on larger jobs are covered in Deposits, Payment Schedules and Lien Waivers for Homeowners.
[H] Warranty terms
Two different warranties usually sit on one estimate:
- The workmanship or labor warranty is the shop's own promise about its installation. Note the length and when the clock starts (usually at completion, sometimes at the invoice date).
- The product or manufacturer warranty covers the item itself, and the manufacturer, not the shop, decides the terms. Some product warranties require registration within a set number of days, or require that a licensed installer did the work.
A one-year labor warranty with a ten-year product warranty is common. It means a defective part is covered for a long time, but the labor to replace it may not be after year one. Ask which applies when something fails in year three.
Is this an estimate, a quote, or a contract?
Shops use "estimate", "quote", "bid" and "proposal" loosely, and the word on the top of the page does not settle what it means. Some shops treat an estimate as a firm price for the written scope; others treat it as a best guess that the final invoice can differ from. Ask directly: "Is this price fixed for this scope, or can the final bill be different, and by how much?" Get the answer written on the estimate.
Whether a signed estimate becomes a binding contract, and what it obliges each side to, depends on its wording and your state's law. This is not legal advice; for a large job, a short review by your own attorney before signing is a reasonable expense. One federal baseline worth knowing: the FTC's Cooling-Off Rule (16 CFR Part 429) gives a three-business-day right to cancel many sales made at your home or away from the seller's place of business, above a small minimum amount, with exceptions such as some emergency repairs; several states add their own home-improvement cancellation rules, some longer. Check your state's consumer protection office.
Questions to ask before you sign
Bring the estimate and go line by line:
- "Walk me through the scope. Where does the job end?"
- "What happens if the price of materials changes after I sign, and before the valid-until date?"
- "For each allowance, what does it typically buy, and do you add markup on overages?"
- "What hidden conditions do you see often on jobs like this, and how will you price one if you find it?"
- "Who pulls the permit, and who is there for the inspection?"
- "When does the labor warranty start, and what does it cover in year two?"
- "What do you need from me, and by when, so the schedule holds?" (selections, access, clearing the room)
A shop that answers these without hesitation has usually written estimates like this one many times. If an answer changes something, ask for a revised estimate rather than a verbal promise, and keep both versions in your records file. See related: Your House Records File and What Goes In It.
How to tell you read it right
You read an estimate well if, before signing, you can say in your own words: what will be gone, what will be new, what you are choosing yourself, which surprises would cost more and how you will hear about them, when each payment is due, and what is covered after the shop leaves. If any of those is a guess, that is the question to ask.
References
- Federal Trade Commission, Rule Concerning Cooling-Off Period for Sales Made at Homes or Certain Other Locations, 16 CFR Part 429
- Your state's consumer protection or contractor licensing office (home improvement contract rules)
- See related: Comparing Estimates That Do Not Match
- See related: Deposits, Payment Schedules and Lien Waivers for Homeowners
- See related: What a Permit Means for You as the Homeowner