How do I compare custom home builder bids and quotes in Arizona?

Compare custom home builder bids by lining them up term for term, not by reading the bottom number. Three things decide whether two bids are really comparable: the allowances (the dollars set aside for items you have not picked yet), the inclusions and exclusions (what each bid does and does not cover), and the contract type (fixed-price or cost-plus). When those three line up, the totals mean something. When they do not, the lowest bid is often the one that left the most out. The Arizona Registrar of Contractors recommends getting written estimates from at least three contractors with a detailed description of the project and price spelled out, which only works if you can read them apples to apples.

Match the allowances before you compare totals

The fastest way two bids drift apart is unequal allowances, so check those first. An allowance is a placeholder dollar amount your builder puts in the contract for a choice you have not made yet, like flooring, cabinets, countertops, or appliances. If Builder A budgets $18 per square foot for flooring and Builder B budgets $9, Builder B's total looks lower, but you will pick the same tile in either house. The gap is not a real savings. It is a lower starting number that you pay back later as an overage.

Pull every allowance line out of each bid and set them side by side. Watch the big-ticket categories: flooring, cabinets, countertops, plumbing fixtures, lighting, appliances, and landscaping. If one builder's allowances are clearly thin, that bid is not cheaper, it is just less honest about what your selections will cost. Ask each builder to price the bid at the same selection level so the allowances match. A builder who sets realistic allowances is doing you a favor, even though their total looks higher today. For the full mechanics of how allowances and overages work, see what a builder allowance is and what happens if you go over and the glossary entry on allowance.

Read the inclusions and exclusions on every bid

A bid is only as complete as its scope, so the exclusions matter as much as the price. Inclusions are the work and materials a bid covers. Exclusions are the things it leaves out, expecting you to pay separately. A low bid often hides its low number in the exclusions list. Common items that get dropped from one bid but not another include:

• Site work: grading, the pad, the driveway, retaining walls, and rock removal. On a Rio Verde or Cave Creek lot, rock and slope can add tens of thousands, and a thin bid may leave it out.
• Utilities: the well or water hookup, the septic system, the electrical service drop, and propane. These are huge on rural land.
• Permits and fees: the building permit, impact fees, and plan review. The ROC says a written estimate should state who is responsible for obtaining building permits.
• Soils report, survey, and engineering: required on most Arizona builds, and easy to leave off a quick quote.
• Landscaping, pools, walls, and final grading: often excluded and billed later.

Build one checklist and run every bid through it. If Builder A includes the well and Builder B excludes it, the two totals are not the same number minus a little. They are two different projects. The goal is a true scope-to-scope match before you let price decide anything.

Know the contract type behind each number

The contract type changes what a bid even means, so confirm whether each is fixed-price or cost-plus. A fixed-price (or turnkey) bid is one total to deliver a finished home. The NAHB describes a fixed bid as one where the "builder or subcontractor furnishes you with a bid that tells you exactly how much you will pay to have a finished home by such and such date." The builder carries the risk of cost overruns, so they add a contingency cushion to protect that price. A cost-plus contract bills you the actual cost of construction plus the builder's fee or markup. There is no padded contingency, but the final number can move with material prices and your selections.

You cannot compare a fixed-price bid against a cost-plus bid as if they are the same thing. The fixed price looks higher because it bakes in risk you would otherwise carry yourself. The cost-plus number looks lower because it is an estimate, not a promise. Ask each builder which model they use and get it in writing. Then compare fixed to fixed and cost-plus to cost-plus. For the full trade-off, see cost-plus vs fixed-price home contracts, the deeper cost-plus custom home contract explainer, and what a guaranteed maximum price (GMP) contract is, which caps a cost-plus deal.

Why the cheapest bid is usually the most incomplete

The lowest bid wins on paper and loses on the build, because the missing dollars do not disappear, they show up as change orders. When a builder underbids, the work still has to get done. The thin flooring allowance gets trued up to your real selection. The excluded well gets added. The light contingency runs out. Each gap comes back as a change order, and by then you have signed, the slab is poured, and you have little room left to shop the price.

This is the single most common way custom home buyers go over budget in Arizona. A bid that is 15% under everyone else is not a deal, it is a forecast of the change orders coming. See why custom homes come in over budget in Arizona for how this plays out. The fix is to treat a suspiciously low bid as a question, not a bargain. Ask the builder to walk you through exactly what is and is not included, and watch whether their allowances and exclusions explain the gap.

A.R.S. 32-1158 also gives you a comparison tool built into the law. Any Arizona home construction contract over $1,000 must state the total dollar amount including taxes, the deposit, and each progress payment tied to a construction stage. A real bid moving toward a contract will have these. A one-line quote with just a price and a start date is not enough to compare, and it is not a contract that meets the statute. See what to include in a custom home contract for the full list.

A simple step-by-step to compare bids fairly

Comparing bids well is a process, not a glance at the totals. Run every bid through the same five steps and the right choice usually becomes obvious.

1. Normalize the allowances. List every allowance line for each builder. Ask them to re-price at the same selection level so the numbers match.
2. Reconcile the scope. Build one inclusions-and-exclusions checklist. Mark what each bid covers. Add the cost of any excluded item back into that builder's total.
3. Match the contract type. Confirm fixed-price vs cost-plus. Compare like to like only.
4. Check the structure against the law. Make sure the bid leads to a contract with the deposit, completion date, and stage-based progress payments required by A.R.S. 32-1158.
5. Verify the builder, not just the bid. Confirm the ROC license is active and class B, and that you got at least three bids, as the ROC recommends. See how to verify an Arizona contractor license with the ROC.

After these steps, the totals finally mean the same thing, and you are choosing on real scope and a builder you trust, not on who left the most off the page. At Jematell Homes we build our bids with realistic allowances and a clear exclusions list so the number you compare is the number you build, with overages handled through written change orders you approve in advance.

Where Jematell Homes comes in

We are a licensed, family-owned Arizona custom home builder. Every project is different, so we will confirm the specifics for your parcel and budget with you directly.

Sources

• Arizona Registrar of Contractors: Before You Hire a Contractor
• NAHB: How Do Builders Charge for Their Services?
• A.R.S. 32-1158 (Home construction contract requirements)