Scope changes are one of the most common sources of friction on building projects. The homeowner wants to add a feature, move a wall, or change a finish. It sounds simple, but without clear documentation, these innocent requests become the disputes that end relationships — and eat your margin.
Why scope changes cause problems
Most disputes do not start with the original agreement. They start when something changes mid-project and one side remembers the conversation differently. The builder thinks the homeowner agreed to pay extra. The homeowner thinks it was included. Neither has it in writing.
The argument is never about the £200 cost of the change. It is about who said what, three weeks ago, on a noisy building site.
How to handle changes well
The key is to treat every change as a small agreement in its own right. Here is a practical four-step process:
1. Acknowledge the request
When a homeowner asks for a change, confirm that you have understood what they want. Repeat it back to them. This avoids misunderstandings before any work begins.
2. Document the impact
Before agreeing to the change, write down what it involves, what it will cost, and whether it affects the completion date. This does not need to be formal — a clear message or note is enough.
3. Get agreement before proceeding
Do not start the extra work until both sides have agreed to the terms. A quick confirmation in writing saves weeks of argument later.
4. Keep a running record
Over the course of a project, small changes add up. Keeping a change log means you can always refer back to what was agreed and when. At the end of the job, you have a complete record — not a scattered trail of text messages.