Getting Builder Quotes and Comparing Them: A Practical UK Guide
PremiumHow to get like-for-like quotes from builders, what each line item means, where the hidden costs are, and a systematic approach to choosing the right builder at the right price. UK-specific for extensions.
Three quotes come back for the same extension, drawn by the same architect, from the same set of plans. One says £42,000. Another says £54,000. The third says £48,500. You're looking at a £12,000 spread and thinking the cheapest builder is the obvious choice.
They're not. And picking on price alone is one of the most expensive mistakes you can make on a building project.
Those three numbers don't represent three prices for the same work. They represent three different interpretations of what "the work" actually is. One includes scaffolding. One doesn't. One is VAT-registered and the other two aren't. One has a provisional sum of £1,300 for screed that will actually cost £2,600. One excludes decoration, flooring, and external works entirely. Until you strip all of that away and compare like with like, the headline number is meaningless.
This guide shows you how to do that.
You should have already shortlisted builders using our finding a builder guide, and you need a clear picture of your total project budget from budgeting and contingency. Without both of those, you'll struggle to evaluate what's in front of you.
Premium content — unlock with an Access Pass
This guide is part of the Kitchen Extension Access Pass. Get full access to every section — from planning through to completion.
Get Access PassOne-time payment. 12 months access.