How to Read a Builder’s Quote: The Line Items That Matter Most

Two builders can quote for exactly the same job and come back with figures 30% apart – and both can be completely honest. The gap almost never means one is trying it on. It usually comes down to what each has included, what they’ve assumed, and what they’ve quietly left for you to sort out later. Learning to read a builder’s quote properly is the single best way to protect your budget and avoid the mid-project surprises that turn a “fixed” price into a moving target.

Fixed price, day rate or provisional sum?

The first thing to check on any builder’s quote is how the price is actually built up. A fixed price commits the builder to a set figure for a defined scope – the risk of anything running over sits with them, provided you don’t change your mind. A day rate means you pay for time, so the final bill depends on how long the work takes; fine for small or unpredictable jobs, riskier on larger ones. A provisional sum is an estimate for an element that isn’t nailed down yet, such as groundworks before anything is dug up. Provisional sums are legitimate, but if a quote is stuffed with them, the “total” at the bottom is really just a starting point.

What “supply and fit” actually includes

“Supply and fit” should mean the builder provides the materials and installs them. The trap is assuming it covers the finish you have in your head. If the quote says “supply and fit kitchen units” with no brand, range or budget attached, you have no idea whether you’re getting entry-level or mid-range. Always look for named materials with specifications – a tile allowance per square metre, a specific boiler model, a named window system. Where you see a vague line, ask what standard has been assumed and what happens if you want to upgrade.

The costs that quietly go missing

Most of the difference between two quotes hides in the things that aren’t there. Before you compare prices, check whether each quote accounts for scaffolding, skip hire and waste removal, building control fees, a structural engineer’s drawings and calculations, and any utility connection or disconnection charges. “Making good” – the plastering, decorating and tidying up after the main work – is another common omission, as is VAT. A cheaper quote that leaves these for you to organise separately can easily end up costing more than the “expensive” one that bundled them in.

What a good quote actually looks like

A quote you can trust is itemised, not a single lump-sum figure with no breakdown. It sets out a clear scope of works so both sides know exactly what’s being done. It names materials with specs rather than leaving everything open. And it ties stage payments to milestones – money released as sections of work are completed and inspected, not on a calendar date regardless of progress. If a builder is happy to put all of that in writing, it’s usually a good sign they run an organised site.

Three things to do before you sign

Reading the quote well is half the job; the other half is a few simple checks that filter out most problems.

Ask for two references from finished jobs. Not “we’ve done loads of these” – two actual customers whose projects are complete and who are happy for you to call. A builder proud of their work will hand these over without hesitation.

Get the contract in writing, not just an emailed quote. A quote is a price; a contract sets out scope, timescale, payment stages and what happens if things change. Even a short written agreement is far better than a verbal understanding.

Never pay more than 10% up front. A reasonable deposit secures your slot and any bespoke materials. A demand for a large chunk of the total before work begins is a warning sign worth taking seriously.

Get a quote you can actually compare

The easiest way to judge a quote is to see how a builder works in practice. Browsing our previous projects gives you a feel for the standard of finish and the kinds of jobs we take on, so you know what a fair price should buy. If you’d like a clear, itemised quote for your own project – with a proper scope of works and stage payments tied to milestones – get in touch with the team at Wolsten and we’ll talk you through exactly what’s included before you commit to anything.

The bottom line

A builder’s quote isn’t just a number – it’s a summary of everything that will and won’t happen on your project. Once you know how to spot the structure, the assumptions and the gaps, comparing quotes stops being a guessing game. Take the time to read the detail, ask about anything vague, and get it all in writing. It’s the difference between a project that lands on budget and one that keeps surprising you.