How to compare builder bids line by line (and spot what is missing)

Step 1: make every builder bid the same house

Bids are only comparable if they price the same thing. Before you request them, put together a bid package that every builder receives:

• The full set of plans, including site plan and any engineering.
• A written specification: foundation type, framing, roofing, windows, siding, insulation, HVAC system, plumbing and electrical fixtures, flooring by room, cabinets and counters, appliances, and exterior work.
• A list of allowances with the same dollar amounts for every builder, for anything you have not chosen yet.
• What you want included on site: clearing, driveway, landscaping, utility connections, permits and fees.
• A request to break the price down by stage or trade, ideally using a template you provide.

Ask each builder to list exclusions and assumptions in writing. A builder who will not break down a bid or list exclusions is telling you something about how the job will go.

Step 2: break each bid into stages

Once the bids are in, put them into a spreadsheet using the eight NAHB stages. Then work out what share of each bid's construction cost each stage represents, and compare those shares with the national averages below.

You are not looking for an exact match. Your lot, design and finishes will move the shares. You are looking for a stage that is far out of line in one bid but not the others. If one builder's site work is half the others', they have probably left something out, such as the driveway, utility connections or permit fees. If one builder's interior finishes are much lower, check their allowances.

Step 3: look for the usual gaps

These are the gaps that most often explain a low bid:

• Excluded site work. Clearing, grading, fill, retaining walls, utility trenching and the driveway are easy to leave out. Our guide to land clearing and site prep lists them.
• Permits and fees not included. Building permit, impact fees and water and sewer tap fees can be significant. NAHB 2024 averaged $7,640 for permit fees, $6,367 for impact fees and $6,260 for water and sewer fees per house.[1] See permit and architectural fees.
• Low allowances. A cabinet or flooring allowance far below what you plan to choose makes the bid look cheaper today and costs you later.
• "By owner" items. Appliances, landscaping, window coverings, gutters or final cleaning may be listed as your responsibility.
• Different specs. A lower-grade window, thinner insulation, fewer outlets or a smaller HVAC system will not be obvious unless you check the spec line by line.
• Builder's risk insurance and temporary utilities left out of the price.
• Short validity. A bid that is only valid for a few days, or that allows price changes for materials, is less firm than it looks.

A worked example: three bids for the same plans

Here is how the comparison plays out with made-up numbers for a 2,000 sq ft house. These figures are an illustration, not real quotes. Builder A bids $410,000, Builder B $455,000 and Builder C $470,000. On totals alone, A looks like the clear winner by $45,000.

When you split the bids into stages, the picture changes. Builder A's site work is $9,000 against about $30,000 for the other two. The exclusions list explains it: A has left out the driveway, utility trenching and impact fees, and assumes the lot needs no fill. A's interior finishes are also lower, because its flooring allowance is roughly half of what B and C allowed for the same rooms, and its appliance line says "by owner".

Add back the missing site work, raise the flooring allowance to match the others and price the appliances, and Builder A lands at about the same number as Builder B. Now the decision is about the things that are not price: B offers a fixed-price contract, a written schedule and a longer warranty, while A's bid is only valid for two weeks and lets material increases pass through to you.

Builder C is still the most expensive, but the breakdown shows why. C has priced a higher-grade window and more insulation than the spec asked for. That is not a reason to rule C out. Ask C to re-price to the spec, and ask B and C what the upgrade would cost them. You end up with three bids that finally describe the same house, which is the only fair way to choose.

Step 4: understand overhead and profit

Every builder bid includes overhead and profit, whether it is shown as a line or built into the prices. In the NAHB 2024 survey, overhead and general expenses averaged 5.7% and profit 11.0% of the sales price.[1] As a markup on construction cost, those two come to about 26%: ($38,248 + $72,971) ÷ $428,215.

A builder with a much lower markup is not necessarily a better deal. They may be pricing to win the job and planning to make it up on change orders, or they may not have the staff to supervise the job well. A higher markup can be worth it for a builder with strong project management, good subcontractors and a clear warranty. Ask each builder how they charge for overhead and profit on change orders, because that rate applies to every change you make.

Step 5: compare everything that is not the price

Two bids with the same total can be very different deals. Compare these as carefully as the numbers:

• Contract type. Fixed price or cost-plus? See cost-plus vs fixed-price contracts.
• Schedule. Start date, completion date, and what happens if it slips.
• Payment schedule. Does it match your lender's draw schedule?
• Change order process. Written approval before work, pricing method and fees.
• Warranty. What is covered, for how long, and who handles claims.
• License and insurance. Verify the builder's license with your state and ask for certificates of insurance.
• References. Talk to recent clients and, if you can, visit a house under construction.

Questions to ask each builder before you decide

1. What exactly is excluded from this price?
2. Which items are allowances, and what do those allowances buy at your suppliers?
3. Are permits, impact fees and utility connection fees included?
4. How long is this price valid, and can it change if material prices rise?
5. Who will supervise the job day to day, and how often will they be on site?
6. How many homes are you building now, and when could you realistically start?
7. How do you price change orders, and what is your markup on them?
8. What does your warranty cover, and can I see a copy?

Write the answers down and ask for anything important to be added to the contract. Once you have a winner, ask them to revise the bid to include anything you found missing, so the number you sign is the number you will pay. Then use our guide to change orders to keep it there.

Frequently asked questions

Sources

1. NAHB: Cost of Constructing a Home 2024 Verified

Figures last checked October 18, 2026. National averages are a planning guide, not a quote. See our editorial policy and data sources.