Why Three Contractor Bids Are Rarely Comparable

Three bids for one project are usually three different projects. The spread between them is mostly a scope difference, not a price difference.

Before comparing totals, normalize the proposals across eight fields:

1. What work is included
2. What work is explicitly excluded
3. Allowances and unspecified materials
4. Who is responsible for permits
5. Who holds which license
6. The warranty, and what it covers
7. The payment schedule
8. What happens when a hidden condition appears

Once those eight are equalized, the numbers become more meaningful. Sometimes the apparent ranking reverses.

Of course, reaching three proposals can be its own project. Calls go unanswered. A contractor visits and never sends the estimate. Another sends a number with so little detail that you cannot tell what it buys. That experience leaves a non-expert homeowner in a difficult position: you need the provider’s expertise to define the work, but you also need enough independent context to judge whether the recommendation and price are reasonable.

The goal is not to assume every contractor is taking advantage of you. It is to close enough of the information gap that you can approve the work from a stronger position.

Why the spread exists

Three legitimate reasons come before any suspect one.

Different assumed scope. Two contractors walk the same project and picture different work. One assumes the substrate is sound. One assumes it is not. Neither is being unreasonable; they are pricing different jobs.

Different quality of materials and labor. Real and often invisible in a proposal, because the line item says the same word.

Different risk allocation. A contractor who absorbs the risk of hidden conditions prices for it. One who passes that risk to you through change orders does not. That is a genuine difference in what you are buying, and it is rarely stated as such.

Then the less legitimate ones. Deliberate underscoping to win the job, with the gap recovered later through change orders. And imprecise scoping, which is not dishonesty but is a problem, because a contractor who has not done the design work is passing their uncertainty to you.

Read the exclusions first

Change your reading order and you will notice different things.

Exclusions. Then allowances. Then assumptions. Then the scope of work. Then the total.

Almost everyone reads in the opposite direction, arrives at the number with the scope fresh in mind, and skims the exclusions afterward as boilerplate. By then the number has anchored you and the exclusions read as fine print rather than as the actual definition of the job.

Reading exclusions first inverts that. You learn what each contractor is not doing before you learn what they are charging, and the differences between three exclusion lists explain most of the spread before you have looked at a single price.

If a proposal has no exclusions section at all, that is information too. It usually means the scope has not been thought through, not that nothing is excluded.

The normalization worksheet

Build a row for each field and a column for each proposal. Where a cell is empty, that is your question.

Field	What to look for	Ask if missing
Work included	Specific components, quantities, and locations, not categories	”Can you list this by area and quantity?”
Work excluded	What the contractor expects someone else to do or you to accept	”What is not part of this price?”
Allowances	Any line where the material, size, or spec is not committed	”What is the allowance amount and what happens if I choose differently?”
Permits	Who applies, who pays, and who schedules any required inspection	”Are permits included in this price, and who pulls them?”
Licensing	Who is contracting with you, and whether that scope requires a license	”Who is the licensed party on this contract?”
Warranty	Duration, what it covers, whether it covers labor and materials, and what voids it	”Is that in writing, and does it cover labor?”
Payment schedule	Deposit, progress payments, and what triggers each	”What is the final payment tied to?”
Hidden conditions	What happens if something unexpected is found	”How are unforeseen conditions handled, and do I approve before work continues?”

The last row is the one people most often skip and most often regret. It is the difference between a fixed price and a starting price, and it is where a low bid quietly becomes a high one.

Allowances

An allowance is a placeholder. It means the contractor has not committed to a specific material, size, or specification, and has budgeted a number instead.

Allowances are appropriate when you genuinely have not chosen something. Tile you have not selected. A fixture you want to shop for. That is what the mechanism is for.

They become a problem when they cover things the contractor should have specified. If the proposal carries allowances for structural materials, quantities, or anything you would expect a professional to have determined by walking the property, the design work has not been done, and you are being handed the uncertainty.

To convert an allowance into a commitment, ask three questions. What exactly is assumed at this number? What happens if the actual cost is higher? Who decides, and do I approve first? Get the answers in writing and the allowance stops being a hole in the price.

A proposal with several significant allowances is not directly comparable to one without them, and adjusting for that is often most of the gap.

Verify who you are hiring

In Minnesota this is quick and worth doing.

Anyone contracting directly with the owner of a residential property of one to four units to provide work in more than one of the state’s eight special skill categories must hold a residential building contractor or residential remodeler license. A specialty contractor providing only a single special skill generally does not need a state license, with residential roofers as a specific exception. Subcontractors who do not contract directly with you are not required to be licensed as contractors, but they are required to register with the state.

The Department of Labor and Industry maintains a public license and registration lookup. Confirming that the entity named on the contract is the entity that holds the license takes a minute and occasionally produces a surprising answer, because the name on the truck, the name on the proposal, and the name on the license are not always the same.

Two cautions. Licensing requirements differ by state. And permits are administered by your city or county rather than the state, so whether one is required for your scope is a local question. Ask the contractor and verify with your municipality rather than assuming either way.

The lowest bid, and the highest one

The lowest bid is usually the smallest scope. Once you have normalized, the cheap proposal frequently turns out to exclude demolition, disposal, patching, or the prep work the others included. That does not make it wrong. A tightly scoped proposal at a low price is a legitimate offer, as long as you know what you are also going to have to arrange separately, and at what cost.

The highest bid is not automatically the safest. It can mean thorough scoping and absorbed risk, which is worth paying for. It can also mean a busy contractor pricing to decline, which is a polite no in numerical form.

The questions that separate those two: how soon can you start, what did you notice about this property that concerned you, and what is your assumption about what is behind the surface. A thorough scoper answers all three specifically. A soft decline answers vaguely and is not eager to schedule a follow-up.

This is also why price alone cannot tell you whether you are being treated fairly. A higher total may represent a more complete job. A lower total may be exactly right for a narrower scope. The useful protection is not a promise of the lowest price. It is understanding what you are buying, what remains outside the proposal, and which questions are still unanswered.

What bid comparison cannot tell you

Three things, and they are not small.

Whether this is the right project. Whether it should happen now. And whether it should be coordinated with something else.

A perfectly normalized comparison of three window proposals still does not answer whether the windows should wait for the siding work you are planning in two years, or whether the money would do more against the drainage issue you have been ignoring. That is a property question rather than a proposal question, and it belongs to priority and sequence rather than to procurement.

Comparing bids well is a real skill. It is also the last step in a chain of decisions, and doing it well on the wrong project is still the wrong project.

What changes the approach

• Insurance-driven work. The scope is partly defined by the carrier, and comparison happens inside those constraints.
• A project inside a larger sequence. Coordination with adjacent work may matter more than price.
• A specialty with few capable local firms. When there are two, comparison is a formality and the real question is which one you want.
• An urgent condition. Speed sometimes outweighs optimization, and that is a legitimate choice as long as you make it knowingly rather than by default.

Our role in this

If comparing proposals and following up on the work has become another job, we can organize the bids around the same work, track the decisions, and keep the follow-up moving. Outside contractors bill you directly and remain responsible for their own work. We do not take referral fees, a percentage of contractor labor, or a share of project value, so recommending that you spend more does not pay us more.

If the numbers still do not reconcile after normalization, the gap is often sitting between two scopes rather than inside either one. That failure has its own article. And every project comparison gets easier when the property has one plan behind it.

Get clear context before you approve the work.

Sources

• Minnesota Department of Labor and Industry, Residential contractor licensing. Accessed August 2, 2026. Supports the special skill licensing requirement, the single-skill and roofer exceptions, and the subcontractor registration requirement.
• Minnesota Department of Labor and Industry, License and registration lookup. Accessed August 2, 2026. Supports the existence of a public verification tool.