How Do You Compare Remodeling Estimates Apples to Apples?

To compare remodeling estimates fairly, give every contractor the same written scope of work, then line the bids up item by item: what's included, which products are named and which are covered by allowances, what's excluded, how changes will be priced, and how payments are scheduled. Only then compare the totals. The lowest number is a bargain only if it covers the same job.

Two bids for "a kitchen remodel" can be far apart and both be honest. One may include new wiring, drywall and permits; the other may assume you'll pick a builder-grade faucet and handle the painting yourself. Your job is to make those differences visible before you sign.

Start with one written scope

The easiest way to get comparable bids is to hand every contractor the same scope sheet. Keep it to one or two pages:

• Room dimensions and photos of the existing space.
• What stays and what goes, including flooring, walls and ceilings.
• Layout changes: moving the sink, range, toilet or shower, or removing a wall.
• Products you've already chosen, by brand and model where you can.
• Items you'll buy yourself, such as appliances or light fixtures.
• Finish level for everything else.

The FTC recommends getting multiple written estimates. When a contractor suggests a change during the walk-through, like a different shower layout, ask them to price your scope first and the alternative separately. Otherwise you're comparing two different projects.

Read the line items, allowances and exclusions

Line items

A one-line bid ("Kitchen remodel, complete," followed by a single total) tells you almost nothing. Ask for a breakdown by phase or trade at minimum: demolition, framing, plumbing, electrical, drywall, cabinets, countertops, tile, flooring, paint, cleanup. California's licensing board advises that contracts be as specific as possible about materials, naming the manufacturer and model rather than simply saying "install kitchen cabinets." Apply the same standard to estimates.

Allowances

An allowance is a placeholder dollar amount for something you haven't chosen yet, such as tile, light fixtures or a faucet. If your choice costs more, you pay the difference. Check three things in every bid:

• Is the allowance realistic for the quality you actually want?
• Does it cover materials only, or materials and installation?
• Will the contractor add a markup to any overage?

Low allowances are the easiest way to make a bid look cheaper than it is. If one contractor's tile allowance is half of another's, put both bids on the same allowance before comparing totals.

Exclusions

Read the exclusions line as carefully as the price. Items commonly left out include permits and fees, dumpster and debris removal, electrical panel upgrades, drywall and paint beyond the work area, appliance installation and haul-away, and repairs to hidden damage such as rot. In older homes, testing and abatement for lead paint or asbestos is a big one: This Old House notes that contractors who suspect those materials must stop work and arrange testing and abatement.

Change orders and unknowns

Every remodel has some. What matters is how each contractor prices them. California's licensing board says changes should be documented in a written change order that includes any price change, and once signed, the change order becomes part of the contract. Ask every bidder:

• How do you price change orders: a fixed price before the work, or cost plus a stated markup?
• What happens if you find rot, outdated wiring or a problem behind the walls?
• Do you need my signature before doing extra work?

Plan for change orders in your budget too. This Old House's 2025 kitchen remodeling guide says hidden costs, including permits, temporary kitchen setup and change orders, can add 15% to 20% to initial budgets, and it recommends a 10% to 20% contingency fund. Our guide to building a remodeling budget with a contingency explains how to set yours.

Why the lowest bid can cost more

The FTC advises against automatically choosing the lowest bid and suggests asking contractors to explain large price differences. A low bid often turns out to be low for one of these reasons:

• Missing scope. It leaves out demolition, electrical, drywall or permits that the other bids include.
• Thin allowances. Realistic product choices push the price back up through overages.
• Vague specifications. "Tile shower walls" with no product named leaves room for the cheapest option.
• Change-order pricing. A contractor who bid tight may make it back on changes.
• No permits. Skipping them saves fees now and can cost far more later.
• No insurance or license. Overhead is lower when the protections are missing.

A higher bid isn't automatically better, either. Sometimes it includes work you don't need. The point is to know which case you're looking at.

A comparison checklist

Use this table with each bid in hand. Any row a bid can't answer is a question for the contractor.

Narrow it down and sign

Once the bids are normalized, ask your top two contractors to revise them to the same scope and allowances. Check licenses and insurance yourself, call references, and read the payment terms against any deposit limit in your state. Our guide to choosing a remodeling contractor covers those checks, and the kitchen remodel cost guide gives national ranges to sanity-check totals.

Then make sure everything the contractor promised verbally ends up in the written contract, as the FTC advises.

Frequently Asked Questions

Sources

• Federal Trade Commission – How To Avoid a Home Improvement Scam
• Contractors State License Board (California) – What Should I Look for in a Contract and Binding Agreements?
• This Old House – Kitchen Remodeling Trends and Tips for 2025
• This Old House – How Much Does Bathroom Demolition Cost? (2026 Pricing)