You send three contractors to the same house. The bids come back at $38,000, $52,000, and $61,000.
The instinct is to take the low one, or to split the difference and assume the truth is in the middle. Both are guesses, because the three numbers are not describing the same job.
Bid leveling is the work of forcing them onto the same scope so the comparison means something. It is unglamorous and it is where rehab budgets are actually won.
Why the bids differ
They bid different work. One included the electrical panel, one assumed it was fine, one didn't look. Same house, three scopes.
They assumed different finishes. "New kitchen" covers stock cabinets with laminate at one end and semi-custom with quartz at the other. That spread alone is often more than the gap between your bids.
They handle allowances differently. One carries $4,000 for flooring; one says "flooring TBD." The second bid looks lower and isn't.
They price contingency differently. Some build it in. Some bid tight and expect change orders. The tight bidder looks cheapest on paper and is often the most expensive at completion.
They mean different things by labor. Subs versus in-house crew, whether supervision is a line or buried, whether permits and dump fees are included.
The fix: scope first, then bid
The reason the bids aren't comparable is almost always that you asked three people to price a house instead of a scope.
Write the scope yourself, in line items, before anyone walks it. Room by room, system by system. Specify quantities and finish level. Then hand the identical document to all three and ask them to price against it.
This one change does more than any negotiation. When three contractors price the same written scope, the differences are real — labor rate, availability, margin — and those are differences you can actually evaluate.
The leveling sheet
When you get them back, build a simple table: line items down the left, one column per contractor. Fill in every cell.
The empty cells are the point. That is where a bid is missing scope, and that is why it was low.
| Line item | A | B | C |
|---|---|---|---|
| Demo and haul | $3,200 | $2,800 | $3,500 |
| Electrical panel | — | $2,400 | $2,600 |
| Rough plumbing | $4,100 | $3,900 | $5,200 |
| Kitchen cabinets | $6,000 | $9,500 | $9,200 |
| Flooring | allowance | $7,400 | $7,900 |
| Permits and fees | — | $1,200 | $1,100 |
Contractor A is $9,000 cheaper and is missing a panel, permits, and a real flooring number. Level those in and A is not the low bid — and now you also know something about how A bids.
What to normalize before comparing
- Add missing line items at the average of the bids that included them
- Convert allowances to real numbers at your actual finish level
- Pull out anything you're supplying so it isn't double-counted
- Add permits, dump fees, and supervision to any bid that omitted them
- Set contingency yourself — usually 10–15%, more on anything pre-1978 or with unopened walls — and apply it equally rather than trusting each bid's internal cushion
What the spread tells you after leveling
Within about 10%: your scope is clear and the market has spoken. Choose on schedule, references, and who you'd rather have on the phone in week six.
One bid still 25% below: it is still missing something, or they are buying the job and intend to make it back on change orders. Ask them to walk you through their number line by line. A contractor who can defend it may genuinely be more efficient. One who gets vague is telling you something.
All three above your underwriting: the deal is not what you thought. This is the most valuable outcome bid leveling produces, and the reason to do it before you close rather than after.
The part that costs people money
Change orders are not usually contractor dishonesty. They are the scope catching up to reality.
Every item you left vague becomes a change order at a price you negotiate from a weak position, because the walls are open and the crew is standing there. The leveling sheet is how you move that negotiation to before the contract, when you still have three options.
Where this sits in what we do
Scope, bid solicitation, leveling, budget with contingency, and a draw schedule tied to milestones are what BUILDER is. It also exists on its own at $2,750 if you already have coordination and only need the construction side.
In Arizona we walk the property and sit in the contractor meetings. Everywhere else it runs off photos, video, and the scope — which works, and works better when someone local is in the room.
Send the deal through the intake form if you want a read on whether the rehab number holds. The call is free.