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The Short Answer
Read a contractor bid in this order: exclusions first, then allowances, then the change-order terms, then the payment schedule, and only then the total. The headline price is the least informative number on the page. It is the sum of a scope you have not checked, a set of assumptions you have not read, and a list of work that is not included.
That formula is the whole method for comparing bids. A $28,000 bid with $6,000 of allowances and $7,500 of excluded work is not a $28,000 job. It is a $41,500 job wearing a smaller number, and until you do the addition you cannot compare it with anything.
Three numbers worth knowing before you open the first bid: remodel contingencies typically run 10 to 20 percent, change-order markup is commonly 10 to 15 percent on top of cost, and deposits commonly run 10 to 30 percent — though some states cap them, and California limits a home improvement down payment to $1,000 or 10 percent, whichever is less.
| Section | What it tells you | Read it |
|---|---|---|
| Exclusions | What the price does not cover and what will be billed later | First |
| Allowances | Which selections are still unpriced, and how much they can move | Second |
| Change-order terms | How new work gets priced, approved, and charged | Third |
| Payment schedule | When money leaves your account versus when work exists | Fourth |
| Line items and quantities | Whether the scope is real work or a category name | Fifth |
| Total | The sum of everything above — the last thing to look at | Last |
Estimate vs Bid vs Quote
The words are used interchangeably in conversation and mean different things on paper. That matters because the difference decides whether a number can change after you shake hands.
| Document | What it commits to | Binding? | Typical use |
|---|---|---|---|
| Estimate | An approximate price based on stated assumptions | Usually no | Early budgeting, "what might this cost" |
| Quote | A price for a defined item or scope, valid for a stated period | Often yes once accepted | Known work, smaller jobs, materials plus labor |
| Bid | A fixed price to perform a defined scope | Becomes the contract price when accepted | Competitive selection, larger projects |
| Proposal | Scope, price, schedule, and terms together | Can become the contract | Residential remodeling, design-build |
| Contract | The enforceable agreement itself | Yes | Everything that follows |
In residential work you will usually receive a proposal that calls itself an estimate. That is fine, as long as you know which parts are fixed and which are placeholders. Three questions settle it:
- Is this a fixed price or an estimate? If the contractor says "estimate," ask what would make it move and by how much.
- How long is the price valid? Thirty days is a common window for residential bids because material prices and crew availability move. A price with no validity period is not much of a price.
- What turns this into a contract? Usually your signature plus a deposit. Read the terms before either happens, because the bid becomes an attachment to the contract and inherits its authority.
One practical rule: a verbal number is not a document. If a contractor will not put scope, price, and inclusions in writing before you commit, that is information about how the rest of the project will be documented too.
What a Bid Should Contain
A thorough bid is not necessarily a long one, but it covers ten things. Missing any of them turns into a question later, and questions later are more expensive than questions now.
| Element | What a usable version looks like | What a vague version looks like |
|---|---|---|
| Scope of work | Rooms, quantities, and what is removed or replaced | "Remodel kitchen" |
| Line items | Labor and material by trade or phase, with unit prices where possible | One lump sum with no breakdown |
| Quantities | Square feet, linear feet, counts, or squares that match the drawings | No quantities anywhere |
| Allowances | Named item, quantity, unit, coverage, and overage basis | "Tile allowance $2,000" with no basis |
| Exclusions | Written list of work not included | Silence, or "everything else extra" |
| Change orders | Written, priced, signed before work proceeds, with stated markup | Verbal changes, price settled later |
| Payment schedule | Amounts tied to completed milestones | "Third up front, third halfway, third at start of finishes" |
| Schedule | Start date, substantial completion date, and how delays are handled | "A few weeks once we start" |
| License and insurance | License number, liability and workers' comp certificates, permit responsibility | "We're fully insured" with no documents |
| Warranty and closeout | Workmanship warranty length, manufacturer warranties, cleanup, and punch list | "Standard warranty" |
The federal baseline is lower than this list. The Federal Trade Commission's consumer guidance says a written estimate should describe the work to be done, the materials, the completion date, and the price, and that a contract should carry the contractor's name, address, phone number, and license number, the start and completion dates, the promises made during sales conversations, and a notice of your right to cancel in the situations where that right applies. Treat that as the floor, not the standard.
Two details are easy to miss and matter later. First, the bid should be dated and should name the revision of the scope or drawings it prices, so nobody is comparing a bid against a plan that changed. Second, every blank should be filled in. A blank line for a date, an amount, or a quantity is an invitation for someone's memory to become the contract.
Reading the Line Items
A long bid can still say almost nothing. Detail is not the same as definition. The test is whether a different contractor could price the same line without calling you, and whether you could tell from the line what you are getting.
Five Questions for Every Line
| Question | Why it matters |
|---|---|
| What exact area or quantity is covered? | Without a quantity, the price cannot be checked or changed fairly |
| What product or performance basis is assumed? | Brand, grade, thickness, and sheen move cost more than labor often does |
| Which preparation and installation labor is included? | Prep is where budgets quietly die: patching, leveling, priming, substrate repair |
| Who supplies the related accessories and finish work? | Trim, hardware, grout, sealant, and touch-up fall between trades |
| What condition is left for the next trade? | "Ready for paint" means something different to a framer and a painter |
Decoding Two Real Lines
"Install new kitchen cabinets — $8,400." That sentence hides the cabinet count and layout, box and door construction, finished end panels, fillers and crown, hardware, interior accessories, delivery, demolition of the old cabinets, disposal, wall repair behind them, and coordination with countertops and appliances. Two bidders can write the same line and mean $8,400 of different work.
"Prep and paint walls — $3,200." Which rooms and which surfaces? How much patching is assumed? Is primer included? Which product and sheen form the basis? How many colors? What protection and cleanup? What finish condition is excluded? A painter who assumes two coats over sound paint and a painter who assumes skim coating are not quoting the same job.
Check the Arithmetic Against the Quantity
Unit prices are the fastest sanity check in the document, and they work in both directions. If a bid shows 320 square feet of tile at $4,200 installed, the unit price is $13.13 per square foot — plausible for mid-grade tile with setting materials and labor in many markets. If the same area shows $1,900, either the tile is very cheap, the substrate prep is missing, or the quantity is wrong.
| Line | Quantity to expect | Check |
|---|---|---|
| Flooring | Installed square feet plus 5–10% waste | Does the material quantity exceed the floor area by a believable margin? |
| Drywall | Wall and ceiling area, not floor area | Is the board area roughly 2.5–3× the floor area on a typical gut? |
| Roofing | Squares (100 sq ft) over roof surface, not footprint | Does the square count reflect pitch and overhangs? |
| Painting | Wall and ceiling surface, minus large openings | Are doors, trim, and ceilings listed separately or assumed in? |
| Cabinets | Linear feet or unit count | Does the price per linear foot match the box and door grade? |
If the quantities are not shown, ask for them. A contractor who will not share quantities is either estimating from experience without a takeoff — which can be fine — or protecting a price that would not survive a check. Either way, the answer tells you something. Our Square Footage Calculator and Roofing Calculator can reproduce the areas in a bid so you are comparing their numbers with yours, not with a feeling.
Allowances
An allowance is an admission that a selection has not been made. The contractor puts a number in the bid so the total can exist, and the real cost is settled later. This is the single most common reason a final bill exceeds the bid, and it is not a trick — it is a placeholder that many homeowners read as a price.
A bid carries a $2,000 tile allowance. You choose tile, thinset, and trim that come to $4,200. The difference, $2,200, is added to the contract — usually plus sales tax, and plus any markup the contract states on selections. Nothing in the scope changed. The money was simply never in the bid.
What a Good Allowance States
- The item and the quantity. "320 sq ft of floor tile" is checkable; "tile" is not.
- What the figure covers. Material only, or material plus setting materials, trim, delivery, tax, and installation labor?
- The quality basis. A grade, brand tier, or price per square foot that the allowance is meant to buy.
- How overages and credits work. Straight difference, or difference plus markup? What happens if you choose something cheaper?
- Who selects and by when. A selection deadline protects the schedule; a missing one protects nobody.
| Allowance | Common bid figure | How far it can move |
|---|---|---|
| Floor and wall tile | $8–$15 per sq ft installed | Large-format or natural stone can double it |
| Cabinets | $150–$350 per linear ft | Custom or inset construction can triple it |
| Countertops | $45–$90 per sq ft | Quartz and stone at the top; laminate far below |
| Plumbing fixtures | $600–$1,500 per bathroom | Freestanding tubs and body sprays blow past it |
| Light fixtures | $75–$200 per fixture | Designer fixtures commonly run 2–4× |
| Appliances | $3,000–$8,000 per kitchen | Professional ranges and built-in refrigeration |
Those ranges are planning figures, not quotes; the point is the ratio. A $6,000 allowance on a $28,000 kitchen means more than a fifth of the job is unpriced. Ask what the allowance buys at the level you actually want, then add the difference to every bid before comparing. If the total allowance load is above roughly 15 to 20 percent of the contract price, the bid is a framework rather than a price.
One fair alternative: ask for the selections to be priced directly instead of allowed. It takes longer up front and produces a document you can compare. Contractors sometimes resist because it delays the bid, which is a legitimate trade-off — but "price the tile I chose" is a reasonable request on a project of any size.
Exclusions and Scope Gaps
An exclusion is work the bid does not include. A scope gap is work the project needs that no bid includes. The first is disclosed, the second is discovered, and both end up on your side of the ledger. This is why the exclusions section is the first thing to read and the cheapest place to ask questions.
| Category | What is often excluded | What it can add |
|---|---|---|
| Permits and fees | Building permit, inspections, plan review, HOA approval | $200–$2,500+ depending on scope and jurisdiction |
| Demolition | Tear-out of existing finishes, fixtures, or walls | Often 5–15% of the project |
| Disposal | Dumpster, hauling, landfill tipping fees | $300–$900 per container plus overage |
| Protection | Floor protection, dust walls, furniture moving | 1–3% on an occupied home |
| Repairs after trades | Drywall patching, paint touch-up, trim reinstallation | Hundreds to low thousands |
| Hazardous materials | Asbestos or lead testing and abatement | $300–$1,200 testing; abatement far more |
| Site restoration | Landscaping, lawn repair, driveway patching | $200–$2,000 |
| Unforeseen conditions | Rot, water damage, out-of-square framing, hidden wiring | Uncapped unless the contract caps it |
| Design and engineering | Drawings, structural letters, surveys | $500–$5,000+ |
| Sales tax | Material tax, sometimes labor tax | Varies widely by state |
The dangerous exclusion is the last one. "Unforeseen conditions extra" is standard and reasonable — nobody can price rot they cannot see — but it should not be a blank check. Ask for the mechanism: an hourly rate plus a stated markup, unit prices for common repairs, a written authorization threshold before work proceeds, and a contingency line in the budget. Ten to twenty percent of the construction cost is a normal remodel contingency, and it belongs in your planning whether or not it appears in the bid.
When an item is excluded, do not assume it is free or that you will handle it later. Ask each bidder to either price it or state in writing that they decline it. A one-line email that says "permits excluded, owner to pull" is worth more than a verbal "don't worry about it."
Comparing Bids Apples to Apples
Bid comparison is a normalization exercise, not a shopping exercise. The goal is to make three documents describe the same job so the numbers mean something. The industry term is bid leveling, and the mechanics are simple even when the documents are not.
A plug number is a labeled estimate you insert for work a bid omitted, so the totals can be compared without pretending the work is free. It is not a change to the bid and it is not a negotiation tactic; it is a placeholder that keeps the comparison honest.
Seven Steps
- Send every bidder the same scope. Same drawings, same room list, same selections, same revision date.
- Build one row per scope category. Demolition, protection, structural, each trade, finishes, fixtures, permits, cleanup, allowances, owner-supplied items, closeout.
- Mark each cell included, excluded, allowance, or unclear. "Unclear" is a real answer and usually the most useful one.
- Price allowances at your actual selections. Use the choices you intend to install, not the bidder's placeholder.
- Plug excluded and missing scope using your own estimates, and label every plug.
- Send written clarification requests and update the sheet with the answers, keeping the date.
- Compare comparable totals. Then weigh schedule, references, license status, and warranty.
Worked Example: Three Kitchen Bids
All three bidders walked the same kitchen and received the same scope. Here is what the documents actually said.
| Line | Bid A | Bid B | Bid C |
|---|---|---|---|
| Base bid | $28,000 | $41,000 | $46,000 |
| Tile allowance | $2,000 (actual $4,200) | $4,000 (actual $4,200) | Priced |
| Cabinet allowance | $3,000 (actual $4,800) | $4,500 (actual $4,800) | Priced |
| Allowance adjustment | +$4,000 | +$500 | $0 |
| Permits | Excluded, plug $1,200 | Included | Included |
| Demolition | Excluded, plug $2,800 | Included | Included |
| Debris removal | Excluded, plug $900 | Included | Included |
| Paint after trades | Excluded, plug $2,600 | Included | Included |
| Electrical rough-in | Excluded, plug $2,400 | Included | Included |
| Plug total | $9,900 | $0 | $0 |
| Comparable total | $41,900 | $41,500 | $46,000 |
Bid A looked $13,000 cheaper than Bid B. Once the allowances are priced at the selections actually being installed and the excluded work is plugged in, it lands at $41,900 — $400 more than Bid B's $41,500. The $13,000 gap was never a discount. It was a difference in what each document was counting, and fifteen minutes of arithmetic exposed it.
Notice what the comparison did not do: it did not invent prices for Bid A's missing work without saying so, and it did not use Bid A's adjusted total to pressure Bid B. Leveling is a decision aid. Using one contractor's corrected number to beat another's price is bid shopping, and it is both poor practice and a good way to lose the contractor you actually wanted.
Columns for the Spreadsheet
A contractor bid comparison spreadsheet does not need to be complicated. Twenty rows and four columns cover most residential projects:
| Column | What goes in it |
|---|---|
| Scope category | One row per trade or phase, plus permits, disposal, protection, and closeout |
| Bid A / Bid B / Bid C | Included, excluded, allowance amount, or a plug with the estimate source |
| Clarification | What each bidder said in writing when you asked |
| Adjusted total | Base plus allowance adjustments plus plugs, recalculated after every answer |
Keep the sheet with the bids it compares, and date it. If a contractor issues a revised bid, start a new version rather than overwriting the old one — the revision history is often the most revealing part of the file.
Payment Schedules
The payment schedule is where a document becomes a risk. Two rules from the Federal Trade Commission cover most of it: do not pay the full amount up front, and do not make the final payment until the work is done and you are satisfied. Everything else is detail about how the middle is structured.
Payments should follow completed work, not the calendar. If you are 60 percent paid on a job that is 30 percent done, you have transferred your leverage to the contractor and your only remaining tool is persuasion.
| Stage | Cumulative share | What should exist before you pay |
|---|---|---|
| Deposit at signing | 10–30% | Signed contract, permits applied for, materials ordered |
| Rough-in complete | 30–45% | Framing, electrical, plumbing, and HVAC roughed and inspected |
| Insulation and drywall | 50–65% | Board hung, taped, and ready for finish |
| Finishes installed | 75–85% | Cabinets, tile, flooring, and fixtures in place |
| Substantial completion | 90–95% | Punch list issued, systems tested, site cleaned |
| Final payment | 5–10% | Punch list closed, final inspection passed, lien waivers received |
Those percentages are a structure, not a rule. Some states regulate them directly. California, for example, caps a home improvement down payment at $1,000 or 10 percent of the contract price, whichever is less, and requires that later payments not exceed the value of work completed — a rule the Contractors State License Board enforces. Other states have their own caps or none at all, so check your state licensing board or consumer protection office rather than assuming a national norm.
Lien Waivers
A mechanic's lien is a claim a subcontractor or supplier can file against your property if they were not paid — even if you paid the general contractor in full. That is the largest financial risk in residential contracting, and no bid mentions it.
The protection is a lien waiver: a signed document confirming payment and releasing the right to lien. Request a conditional waiver with each progress payment, effective once the payment clears, and an unconditional waiver after it has. On a project with subcontractors, collect waivers from the general contractor and from each sub and supplier you can identify, because a waiver from the GC alone does not stop an unpaid electrician from filing against your house.
How to Pay
Pay by check or credit card so there is a record and, with a card, a dispute process. The Federal Trade Commission's home improvement guidance singles out contractors who demand payment for everything up front or accept cash only, because neither gives you a way to recover money if the work stops. Wire transfers, gift cards, and payment apps have the same problem: once the money moves, your only remedy is a court claim.
Red Flags
Some warnings are in the document and some are in the behavior around it. Both matter, and the document ones are easier to check before you are emotionally committed to a start date.
| Red flag | Why it matters |
|---|---|
| One lump sum, no breakdown | You cannot verify scope, compare bids, or price a change fairly |
| No exclusions list | Ambiguity favors whoever interprets it later, and that is rarely you |
| Allowances above 15–20% of the contract | A large share of the job is still unpriced |
| Deposit above one third | You are financing the contractor's cash flow, not the work |
| "Price good today only" | Urgency is a sales technique; legitimate prices carry a stated validity period |
| Cash only, or wire to a personal account | No paper trail and no recovery route |
| "You pull the permits" | Permits should be pulled by the licensed contractor doing the work |
| No license number or insurance certificate | Verify both with the issuer, not from a photo on a phone |
| No start or completion date | A schedule is part of a bid, not a courtesy |
| "Standard warranty" with no term | Workmanship warranty is separate from the manufacturer's material warranty |
| Verbal change orders | Whoever remembers the conversation best wins the dispute |
| Blank spaces in the contract | A blank is a term someone else can fill in later |
| Door-knocking or "leftover materials" | Named by the FTC as a common home improvement scam pattern |
| Pressure for an immediate decision | Also FTC-listed; a real deadline survives a night's sleep |
| Steering you to a specific lender | Tied financing removes your leverage to withhold payment over defects |
No single item is disqualifying. A contractor who prefers a larger deposit because they front material costs is not automatically a problem; one who cannot produce a license number, refuses to list exclusions, and wants cash is a pattern. Read the flags together.
Questions to Ask Before You Sign
Ten questions, each aimed at a specific place where bids go wrong. Ask them by email so the answers are in writing and can be attached to the contract.
| Question | What a good answer sounds like |
|---|---|
| What exactly is excluded from this price? | A specific list, including permits, disposal, protection, and patching |
| Which allowances are in this bid, and what do they buy? | Item, quantity, unit, and coverage for each one |
| How are change orders priced and approved? | Written and signed before work, with a stated markup |
| Who pulls the permits, and are the fees included? | The licensed contractor, with fees in the bid |
| What is the payment schedule, and what triggers each payment? | Milestones, not dates; final payment after acceptance |
| When will you start, and when is substantial completion? | Dates, plus how weather and inspection delays are handled |
| Who is on the crew, and are subs licensed and insured? | Named crew, certificates for each sub |
| What workmanship warranty do you provide, and for how long? | A stated term in the contract, separate from manufacturer warranties |
| How will you handle something unexpected behind the wall? | A described process, hourly or unit pricing, and an approval threshold |
| Can I see two recent projects similar to mine? | Addresses or references you can actually contact |
The answer to "what is excluded" is the single most valuable response you will get. A contractor who answers it precisely is telling you they have thought about the job. One who answers "nothing, it's all included" is telling you they have not read their own exclusions.
Common Mistakes
- Comparing totals before scope. The total is the output of the document, not a summary of it. Normalize first, then compare.
- Reading allowances as prices. An allowance is a placeholder. Price your actual selections into every bid before deciding anything.
- Treating exclusions as someone else's problem. Excluded work still has to be done by someone, and that someone is usually the owner.
- Accepting verbal clarifications. "We'll include the disposal" is worth nothing at the end of the job. Get it in writing or in a revised bid.
- Not verifying the license and insurance. A certificate is a claim; the issuing board and the insurer are the verification.
- Paying ahead of the work. Payments should trail completed milestones, not lead them.
- Skipping lien waivers. Paying the general contractor does not protect you from a subcontractor's lien.
- Letting changes happen without paperwork. A written, priced, signed change order before the work is the only version that holds.
- Choosing on price alone. The cheapest comparable bid from a contractor who cannot start for four months is not the cheapest project.
Frequently Asked Questions
References
- Federal Trade Commission, Consumer Advice, How To Avoid a Home Improvement Scam — written estimate and contract elements, deposit guidance, and warning signs, consumer.ftc.gov
- California Contractors State License Board, Industry Bulletin: Progress Payment Restrictions — the $1,000 or 10 percent down payment cap and payment rules for home improvement contracts, cslb.ca.gov
- Consumer Financial Protection Bureau, Start recovering and rebuilding your financial life — mechanic's liens and lien waiver practice for homeowners, consumerfinance.gov
- AACE International, Recommended Practice 10S-90: Cost Estimate Classification System — how estimate accuracy and basis of estimate change by class, aacei.org
- American Institute of Architects, A201 General Conditions of the Contract for Construction — change order, submittal, and payment certification framework, aia.org
- Associated General Contractors of America, Construction Contract Documents and Change Order Practice — industry guidance on scope definition and change management, agc.org
- National Association of State Contractors Licensing Agencies, State Licensing Board Directory — locate the board that verifies a contractor's license and deposit rules, nascla.org
- USA.gov, State Consumer Protection Offices — official state agencies for contractor complaints and deposit-limit questions, usa.gov
Disclaimer: This guide explains how to read and compare residential construction bids in the United States. Contract law, licensing requirements, deposit limits, lien rules, cancellation rights, and payment regulations vary by state and change over time, and nothing here is legal advice. The figures cited are typical planning ranges and published examples, not quotes for your project. Verify a contractor's license, insurance, and complaint history with the issuing board before signing, confirm deposit and payment rules with your state contractor licensing agency or consumer protection office, and have a lawyer review any contract you do not fully understand.