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Why do my contractor quotes describe three different jobs?

Often each contractor has priced a slightly different job, with other products, missing parts or placeholder allowances, so compare totals only after every bidder works from the same written scope; California's contractor board tells homeowners to compare bids based on identical plans, specifications and scope of work.

Source: Consumers' Checkbook, Getting Prices and Proposals for Remodeling Work, read 15 October 2026, read 15 October 2026.
Source: CSLB consumer page on finding a contractor (California), read 15 October 2026, read 15 October 2026.

Researched by the InstaBids editorial team. Last checked: 15 October 2026

Key facts

Where do three quotes for one project split apart?

Check these places where quotes for the same project drift into different jobs: the scope of work, the materials and brands, the exclusions, any allowances, the permit, and cleanup with debris removal. A difference in any one of them changes what is being priced, so the totals stop describing one project.

  1. Scope of work. One bidder may include the preparation and repair under the surface, while another prices only what you can see. Virginia's consumer booklet on hiring a contractor, read 15 October 2026, says your contract should "spell out exactly what the contractor will and will not do."

    Source: Virginia DPOR, What You Should Know Before You Hire a Contractor, read 15 October 2026, read 15 October 2026.

  2. Materials and brands. California's contractor board (CSLB), on its contract page read 15 October 2026, says of a contract: "It should be as specific as possible regarding all materials to be used, such as the quality, quantity, weight, color, size, or brand name as it may apply." Its own example contrasts oak kitchen cabinets named by manufacturer, model and plan with a bare instruction to install kitchen cabinets.

    Source: CSLB consumer page on contracts (California), read 15 October 2026, read 15 October 2026.

  3. Exclusions. A line one bidder includes and another leaves out is the quietest difference of all, because a missing line prints nothing. Consumers' Checkbook, in remodeling advice last updated December 2021 and read 15 October 2026, says: "Make sure that any differences meet your expectations and preferences—and that major components of your project weren’t omitted from the proposal."

    Source: Consumers' Checkbook, Getting Prices and Proposals for Remodeling Work, read 15 October 2026, read 15 October 2026.

  4. Allowances. Checkbook says: "If your plan isn’t fully detailed with an exact layout, specs, products, and materials, remodelers likely will pepper their proposals with “allowances,” which act as placeholders for materials and products that you’ve yet to select, along with labor to install them." Two quotes with different placeholders are not yet two prices for the same finished room.

    Source: Consumers' Checkbook, Getting Prices and Proposals for Remodeling Work, read 15 October 2026, read 15 October 2026.

  5. Permit. The CSLB contract page says of a contract: "It should detail the work, price, when payments will be made, who gets the necessary building permits, and when the job will be finished." Virginia's booklet adds: "All permit applications should match the work as written into your contract."

    Source: CSLB consumer page on contracts (California), read 15 October 2026, read 15 October 2026.
    Source: Virginia DPOR, What You Should Know Before You Hire a Contractor, read 15 October 2026, read 15 October 2026.

  6. Cleanup. The CSLB contract page says: "Make sure the contract includes everything that is agreed to, up to and including complete cleanup and removal of debris and materials, along with special requests like saving lumber for firewood or saving certain materials or appliances." One quote may haul the old material away while another leaves the pile by your driveway.

    Source: CSLB consumer page on contracts (California), read 15 October 2026, read 15 October 2026.

What do consumer agencies and guides say about comparing bids?

Compare bids only once they rest on the same plans and written scope: California's contractor board and Virginia's contractor regulator both say so in their consumer guidance, and the FTC adds that you should ask for an explanation when estimates differ widely. Their exact words, with the dates we read them, are below.

Source: CSLB consumer page on finding a contractor (California), read 15 October 2026, read 15 October 2026.
Source: Virginia DPOR, What You Should Know Before You Hire a Contractor, read 15 October 2026, read 15 October 2026.
Source: FTC home improvement guidance, read 15 October 2026, read 15 October 2026.

The CSLB page on finding a contractor in California, read 15 October 2026, says: "Get at least three written bids on your project, and make sure you're comparing bids based on identical plans, specifications, and scope of work."

Source: CSLB consumer page on finding a contractor (California), read 15 October 2026, read 15 October 2026.

Virginia's Department of Professional and Occupational Regulation, in its consumer booklet on hiring a contractor, read 15 October 2026, says: "Make sure all bids are based on the same set of specifications." The next sentence reads: "Discuss bids in detail with each contractor, and be sure you understand the reasons for any variations in price."

Source: Virginia DPOR, What You Should Know Before You Hire a Contractor, read 15 October 2026, read 15 October 2026.

The FTC's home improvement guidance, read 15 October 2026, says: "Don’t automatically choose the lowest bidder. And ask for an explanation if there’s a big difference among the estimates."

Source: FTC home improvement guidance, read 15 October 2026, read 15 October 2026.

Consumers' Checkbook, read the same day, says: "Ask for and look for detailed pricing, which will let you compare proposed materials, products, and work." It also notes: "Even if you have plans that detail every facet of your job—down to the make and model of each faucet and the exact number of tiles needed for your backsplash—contractors often will propose to do at least some parts of the job differently and supply slightly different products and materials."

Source: Consumers' Checkbook, Getting Prices and Proposals for Remodeling Work, read 15 October 2026, read 15 October 2026.

None of the passages quoted above names a right price for your job, and nothing on this page is legal advice.

Why could the lowest quote be leaving out work?

Treat a quote well below the others as a scope question before a price question: California's contractor board (CSLB) says such a bid probably means the contractor made a mistake or is not including work that competitors quoted. Ask that bidder to walk through each line item against your written scope.

Source: CSLB consumer page on finding a contractor (California), read 15 October 2026, read 15 October 2026.

The CSLB page on finding a contractor, read 15 October 2026, says: "In fact, you should beware of any bid that is substantially lower than the others. It probably indicates that the contractor made a mistake or is not including all the work quoted by their competitors."

Source: CSLB consumer page on finding a contractor (California), read 15 October 2026, read 15 October 2026.

A gap can also sit in what was said rather than written. The FTC's list of what a contract should include, read 15 October 2026, has this item: "any promises made during conversations or calls related to issues such as the scope of work and the cost of labor and materials". If one bidder told you the old fixtures go to the dump and another said nothing, ask both to put the answer on paper.

Source: FTC home improvement guidance, read 15 October 2026, read 15 October 2026.

The higher quote is not automatically the better one either. Checkbook says: "Don’t assume that high-priced companies perform better work than low-priced ones." Virginia's booklet gives the other side: "Sometimes a higher price may be worth it, if the materials to be used are of higher quality or the work is more extensive." Both point back to the same habit of reading what each number includes.

Source: Consumers' Checkbook, Getting Prices and Proposals for Remodeling Work, read 15 October 2026, read 15 October 2026.
Source: Virginia DPOR, What You Should Know Before You Hire a Contractor, read 15 October 2026, read 15 October 2026.

What can you do to make your quotes comparable?

Start by writing one scope yourself and handing the identical page to every bidder, then compare the replies line by line rather than total by total. One shared page gives each contractor the same job to price, so a difference between quotes points more to the bidder than to the description, though each bidder may still assume different hidden conditions.

  1. Write the job down before anyone prices it: what is being done, the materials or brands you want, what is excluded, who applies for any permit, who handles cleanup and debris removal, and the start date and finish date you need. Add a photograph of each area involved.
  2. Send the same page to every bidder and ask each one to price it as written. If a contractor suggests another product or method, ask for it as a separate option line, so the main number still matches your page.
  3. Ask every bidder to list each allowance and what it assumes, so you can see which items are still placeholders.
  4. Lay the quotes side by side in rows that follow your scope: work, materials, exclusions, allowances, permit, cleanup, dates and payment schedule. A blank row in one quote is a question for that bidder.
  5. If your plan changes after the quotes arrive, send the revised page to everyone who bid, so the comparison stays on one job.

The same discipline carries on after you sign. The CSLB contract page says that if you add or subtract work, substitute materials or equipment, or change the completion date, you should note it in writing on a change order "and include any price changes."

Source: CSLB consumer page on contracts (California), read 15 October 2026, read 15 October 2026.

How is InstaBids set up?

One fact about InstaBids follows. Contact details stay hidden until the homeowner picks a contractor and they confirm the connection.

Source: InstaBids process and privacy, live-page excerpts reviewed 15 October 2026., read 15 October 2026.

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