Start with the documents
Identify the drawings, specification and revision date used for the estimate. If two builders have priced different information, their totals are not directly comparable. Keep a short document list with each proposal.
Read the estimate alongside your brief. Check that the rooms and outcomes you expect are actually represented in the described work, rather than relying on what was discussed informally.
Look for complete descriptions
A line such as “kitchen works” can hide several different assumptions. Ask what is included in preparation, supply, installation, service alterations and finishes. A useful estimate helps you understand the work, not just the arithmetic.
Check interfaces between trades and suppliers. Who receives the kitchen? Who checks damaged items? Who connects equipment and makes good around it? A gap between scopes can become a late decision.
Understand allowances
Where a product or detail has not been selected, the estimate may use an allowance. Ask what it covers and which assumptions sit behind it. A generous-looking total can still contain an unrealistic allowance for something important to you.
Keep a decision list next to the estimate. Each unresolved selection should have an owner and a date, so allowances become confirmed choices before they disrupt ordering or installation.
A useful next step
Confirm drawing and specification revisions.
Highlight allowances, exclusions and unclear responsibilities.
Ask how taxes, separate fees and specialist work are shown.
Agree a written change process and a decision schedule.
Read the exclusions
Exclusions are useful when they are clear. Professional appointments, surveys, fittings, external work and temporary arrangements may be handled separately. The question is whether you have accounted for them in the overall project budget.
Ask for clarification where a boundary is vague. “By others” should identify the responsible party rather than simply moving uncertainty out of one document.
Check the overall cost picture
Ask how taxes, fees and any separate specialist costs are represented in the proposal. Keep the building estimate distinct from the total amount the household expects to spend. Confirm the applicable treatment with the relevant professional rather than assuming every proposal uses the same basis.
Think about retained furniture, new fittings, temporary living arrangements and a sensible allowance for uncertainty. These may sit outside the building contract but still affect your decision.
Connect cost and programme
An estimate and a programme should tell a compatible story. Long-lead products, access restrictions and an occupied house can affect the sequence. Ask which decisions must be made before the proposed start and what information remains outstanding.
Treat an early completion date as something to understand, not simply a number to prefer. The assumptions behind it matter.
Agree how change works
Ask how a proposed change is described, priced and approved before work proceeds. Record its effect on both cost and time. This is especially useful when opening-up work reveals something unexpected.
Keep one clear record of instructions. A quick conversation on site can be helpful, but consequential changes need a shared written understanding.
Compare like with like
Build a comparison with the same scope headings and place questions beside uncertain entries. Resolve those questions before judging the difference between totals. The aim is a clearer decision, not forcing different proposals into a misleadingly simple ranking.
Return to your brief: which proposal demonstrates that the team understands the house, the desired result and the practical constraints? Cost is essential, but it needs context.
