LIFE · BMC FIELD MANUAL
Contractor Estimate Comparison Checklist: Scope, Allowances, Schedule and Payment
Three totals are not three comparable bids. Build one written scope, force every allowance and exclusion into the open, verify the business and then compare the complete job—not the number at the bottom of page one.
The useful answer
- Issue the same scope, drawings, measurements, finish assumptions and site constraints to each bidder so differences become visible.
- Separate fixed work, unit prices, allowances, alternates, exclusions, owner-supplied items and unknown conditions before comparing totals.
- Verify identity, license where required, insurance, references, complaint history, permit roles, supervision and subcontractors independently.
- Do not start from a vague estimate. Move the selected scope into a signed contract with change-order, payment, schedule, warranty and closeout terms appropriate to local law.
Create one bid package before calling contractors
Write the problem, desired outcome and physical limits in plain language. Attach the same photos, existing-condition notes, drawings or specifications, room and access information, utility constraints, occupied-hours rules and target decision date to every invited contractor. Mark what is known, what must be field-verified and what requires a designer, engineer, inspector, utility or code official. A contractor should not have to invent the project merely to estimate it.
Define the boundaries: demolition, protection, hauling, temporary services, preparation, installation, finishes, testing, cleanup and restoration. State whether the owner or contractor supplies each item. Ask every bidder to acknowledge the package and list assumptions, substitutions and exceptions in writing. The purpose is not to dictate construction means you are unqualified to design; it is to keep one bidder from pricing a full repair while another prices only the visible finish.
- Site: address, access, parking, work hours, occupants, pets, storage and known hazards.
- Scope: locations, quantities, interfaces, demolition, protection, installation and restoration.
- Evidence: photographs, reports, drawings, product requirements and questions needing verification.
- Bid rules: due date, site-visit process, alternates, allowance format and required business documents.
Normalize every estimate into the same columns
Create a comparison sheet with one row for each scope element and one column for each bidder. Record labor, material, equipment, subcontractor, permit, disposal, protection, tax and overhead-and-profit treatment as stated—not as guessed. Move allowances and alternates out of the base total so you can see what the project costs under the same selections. An allowance is not a finished price; it is a placeholder whose quantity, quality level, markup and adjustment method must be defined.
For an omitted row, write excluded or unanswered rather than zero. Ask for clarification in the same written format and preserve the response. Unit prices are useful for genuinely variable quantities such as concealed damaged material, but only when the unit, measurement method, approval step and markup are clear. A low base price with large undefined allowances, no restoration and no disposal can cost more than a complete estimate. Compare the likely total, credible range and risk retained by the owner.
- Base scope: exactly included work and exact locations.
- Allowance: dollar amount, quantity, product level, labor, tax, delivery and markup treatment.
- Unit price: unit, trigger, measurement, authorization and maximum exposure.
- Exclusion: omitted work, owner responsibility and what happens if it becomes necessary.
Verify the business separately from the proposal
Confirm the legal business name, physical address, phone, responsible person and the name under which any license is issued. Check the current state or local licensing authority when the trade or jurisdiction requires licensing. Request proof of insurance and verify coverage with the issuing agent when the project risk justifies it; a certificate image can be outdated or altered. Ask who will supervise daily work, which trades are subcontracted and who is responsible for permits and inspections.
FTC consumer guidance recommends checking complaints and references and getting written estimates. Contact recent customers with comparable work and ask about scope accuracy, communication, site protection, schedule changes, change orders and closeout—not merely whether they liked the contractor. Search official court, licensing, consumer-protection and recall information relevant to the project rather than relying on a badge on a lead-generation platform. No single rating, reference or license proves quality; verification reduces avoidable uncertainty.
- Identity: legal name, assumed name, address, contact and authorized signer.
- Authority: current license or registration where required, permit role and inspection responsibility.
- Risk: insurance verified with the source, safety plan when relevant and subcontractor controls.
- Track record: recent comparable references, complaint response and completed-project documentation.
Compare schedule, access and change-order systems
A schedule should identify an estimated start, substantial completion or milestone sequence, dependencies, owner decisions, long-lead items, inspection points and weather or access assumptions. Treat a date as an estimate unless the contract creates a clear obligation and remedy under applicable law. Ask how many projects the supervisor handles at once, when materials are ordered and how a delay is communicated. A fast promise without labor, material and inspection assumptions is not a useful schedule.
Require written change authorization before changed work proceeds except for an emergency process defined in the contract. A useful change order states the condition, proposed solution, price or unit calculation, time effect, markup and approvals. Photographs and measurements should support concealed-condition claims without turning the owner into the technical designer. Define who can approve, how quickly a decision is needed and what happens when work pauses. Verbal field decisions are where comparable bids often become incomparable projects.
- Sequence: mobilization, protection, demolition, inspection, rough work, finish, testing and closeout.
- Dependencies: permits, selections, owner access, utility coordination, weather and long-lead products.
- Change order: written scope, evidence, price, markup, schedule effect and signatures before work.
- Communication: named supervisor, update cadence, urgent contact and decision log.
Build a payment and document gate
FTC guidance cautions consumers about contractors who demand full payment upfront and recommends paying in a way that preserves protections when possible. Deposit limits and permissible schedules can be controlled by state law, so verify current local rules rather than copying a percentage from another project. Tie progress payments to defined, observable milestones and documentation, not dates alone. Preserve invoices, approved changes, inspection results and conditional or final lien releases when appropriate under local law.
Before any payment, reconcile contract amount, approved changes, previous payments, current completed work, stored materials, unresolved damage and remaining balance. Do not pay for a milestone you cannot identify. Significant projects may justify review by an attorney, architect, engineer, construction manager, lender or insurer. Never falsify completion for a draw, permit or insurance record. The payment sheet should make the financial story understandable to someone who was not present for every conversation.
- Contract: signed scope, price, allowances, schedule, change orders, dispute terms and cancellation notices.
- Milestone: objective completion definition, inspection or evidence, invoice and approved change total.
- Payment: date, method, recipient, amount, remaining balance and required releases.
- Stop gate: pressure for cash, full upfront payment, blank documents, permit avoidance or financing you did not request.
Use a final selection and closeout scorecard
Score completeness before price. Did the bidder walk the site, acknowledge the package, answer exclusions, identify materials, define allowances, explain the schedule, name supervision, address permits and supply the requested verification? Then compare likely total, uncertainty and ownership burden. Do not average subjective points into fake precision. Write the specific reason one proposal is stronger and the remaining risk you are accepting. A higher quote can still be incomplete; a lower quote can still be the best value when it is genuinely comparable and well supported.
At closeout, collect permit and inspection records, approved changes, paid invoices, warranties, product manuals, model and finish information, maintenance instructions, spare materials, photographs of concealed work when available, test results and final releases appropriate to local law. Record unresolved punch items with owner, due date and completion evidence. Update the home inventory and insurance file. The authority asset is a traceable chain from scope to bid to contract to changes to final condition—not a folder of three totals.
- Completeness: every scope row included, excluded or answered.
- Credibility: verified identity, authority, insurance, supervision, references and realistic schedule.
- Cost: normalized base, allowances, alternates, unit exposure, likely total and contingency ownership.
- Closeout: inspections, warranties, manuals, releases, photographs, punch list and maintenance handoff.
Frequently asked questions
How many contractor estimates should I get?
FTC consumer guidance commonly recommends multiple written estimates; three is a useful comparison target when qualified bidders are available. Quality and comparability matter more than reaching an arbitrary count.
What should a written estimate include?
At minimum, identify the contractor, work, materials, price and schedule. A useful comparison also separates allowances, alternates, exclusions, permits, disposal, change-order terms and payment assumptions.
Should I choose the lowest contractor bid?
Not automatically. Normalize the scope and likely total, then weigh completeness, verified qualifications, schedule, supervision, change-order system and the risk the estimate leaves with you.
How much should I pay upfront?
Deposit and payment rules vary by jurisdiction and project. Verify current state and local law, avoid full upfront payment, and tie later payments to defined work and documentation in the signed contract.
Sources and further reading
Claims checked against these official or professional sources on October 5, 2026.
- Federal Trade Commission — How To Avoid a Home Improvement ScamCurrent consumer guidance on contractor checks, written estimates, contracts, payments and cancellation information.
- Federal Trade Commission — Home Repair ScamsPlain-language guidance to verify licensing and insurance, get written estimates and use a written contract.
- Federal Trade Commission — For the HomeOfficial consumer hub for home-improvement, warranty, energy and repair topics.
- USA.gov — State Consumer Protection OfficesOfficial directory for state-specific contractor complaints and consumer-protection help.
- USA.gov — State Attorneys GeneralOfficial directory for current state attorney-general consumer resources.