Get an instant cost estimate, compare builder quotes side-by-side, and spot missing items, overcharges, and hidden gaps before you sign.
6 free analyses, no card required
These are real costs that catch homeowners out — usually after the build has started.
Drainage not included in the quote — discovered during groundworks
Insulation underspecified — fails building regs inspection, has to be redone
The cost of checking before you sign — expert analysis of your quotes and plans. 6 free analyses with account.
Your boiler quote doesn't mention a powerflush — that could void your warranty
No Gas Safe registration number on the quote — legally required for all gas work
Missing FENSA certificate — you'll need Building Control sign-off at extra cost
From a full house extension to a single boiler install. Upload any builder or tradesperson quote and get expert analysis.
Plus damp treatment, structural work, decorating, and more. If it's a UK building or trade quote, we can analyse it.
Quick estimate first, deep analysis when you need it
Type, size, location, finish quality. 60 seconds.
Trade-by-trade costs, contractor vs direct comparison.
Extracts line items, checks certifications, and spots red flags — from a full build to a single trade.
Full picture on price, missing items, and design. Know exactly what questions to ask.
I managed my own extension in Hertfordshire. Three quotes for the same work, £75k apart. I had no idea which was fair. Drainage wasn't included. Insulation failed the building regs inspection. I was making a six-figure decision with basically no independent information, and that properly annoyed me.
I've spent 18 years in engineering and technology. RAF avionics, defence, robotics, government. Building products where getting the details wrong isn't an option. So I built MyBuildAlly: upload your quote and it pulls it apart line by line against real UK cost data. What's in range, what's high, what's missing entirely. It checks your plans against current building regulations so you know what to ask before you sign.
No fake reviews. No “trusted tradesman” directories. Just independent analysis to help you get the right work at the right price.
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MyBuildAlly gives UK homeowners an independent second opinion on builder quotes. It checks price fairness against regional benchmarks, identifies scope gaps and missing trades, and flags potential compliance issues — so you can sign with confidence.
Upload your builder's quote as a PDF. We extract every line item, compare costs against professional benchmarks for your region, and flag anything that looks off — missing items, overcharges, or certification gaps. Full report in under 30 seconds.
Yes, completely free with no signup required. You get a full trade-by-trade cost breakdown covering 14 categories, regional pricing for your postcode, and a downloadable PDF report.
We cover 14 trade categories including groundworks, structural, roofing, plumbing, electrical, plastering, joinery, and more. Project types include extensions, loft conversions, new builds, bathroom and kitchen renovations, garage conversions, and individual trade jobs.
The cost estimator is free forever. Quote analysis is £10 per project. Your first analysis is free when you create an account.
Yes. We don't sell leads, share your details with builders, or monetise your data. Your uploaded quotes are processed for analysis only.
A second quote tells you one builder's price. MyBuildAlly tells you whether any quote is fairly priced against regional benchmarks, whether the scope is complete, and which questions to ask — across every quote you receive.
Not at all. The tool is designed for homeowners with no construction background. Reports are written in plain English with clear explanations of what each finding means and what action to take.
Our benchmarks are based on professional cost data, but every project is unique. Use the findings as a starting point for a conversation with your builder — not a guarantee.
Upload your quotes, spot the gaps, and know what questions to ask.
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6 free analyses, no card required