Knowledge base

Construction guides

Plain English guides to UK construction contracts, quotes, planning, and your rights — written by experienced quantity surveyors.

How to check a builder's quote

What to look for before you sign — certifications, scope gaps, dangerous phrases, and whether the price is fair.

8 min readQuote checker

My builder is asking for more money — what should I do?

How to assess a mid-project claim, what makes a valid variation, and how to respond without damaging the relationship.

7 min readChange checker

JCT contracts explained — a plain English guide

What a JCT contract is, the different types, what each clause means, and why you should never use a homemade contract.

10 min readRisk radar

VAT on self-build projects — how to reclaim it

The HMRC DIY Builders Scheme explained — who qualifies, what you can reclaim, the deadlines, and common mistakes.

6 min readRisk radar

Planning conditions — what they mean and what you must do

The difference between planning permission and planning conditions, how to discharge them, and what happens if you don't.

7 min readRisk radar

Variation orders in construction — a complete guide

What a variation order is, when contractors are entitled to claim one, and how to assess whether a claim is legitimate.

8 min readChange checker