Most builders are not losing money because of one huge unpaid variation. They are losing money because of twenty small ones. A socket moved here. A pipe boxed in there. A different tile trim. A return visit because the client changed their mind.
Each request feels too small to make a fuss about. By the end of the job, those small requests have eaten a week of labour and a chunk of your margin.
What Counts as a Variation?
A variation is any change from the agreed quote, drawings, specification, or scope. It does not have to be dramatic. Common variations include:
- Changing fixture, fitting, tile, flooring, or finish specification
- Adding sockets, lights, radiators, taps, shelves, or joinery
- Moving walls, openings, pipework, drainage, or electrical points
- Extra making good caused by hidden defects
- Client-supplied items arriving late, wrong, or incomplete
- Additional waste removal, scaffold time, access equipment, or subcontractor visits
The Rule: Price Before You Do It
The cleanest rule is simple: no variation work starts until the price is agreed. This does not need to be hostile. It can be as simple as:
“No problem. That is outside the original quote, so I will price it and send it over before we do the work.”
If you say this from the first change request, it becomes normal. If you let five changes slide and then start charging, the client feels like the rules changed halfway through.
What a Variation Should Include
A useful variation note should include:
- What changed
- Why it is outside the original scope
- Materials required
- Labour required
- Subcontractor or hire costs if relevant
- Markup or margin
- Any impact on programme
- Client approval by email, signature, or online approval
Do Not Forget Programme Impact
Some variations are cheap in materials but expensive in time. Moving a socket might delay plasterboarding. Changing tiles might add another supplier run. A late client decision can push a subcontractor visit into the next week.
If the variation affects the completion date, say it clearly. Otherwise the client gets the extra work and still expects the original finish date.
How to Price Small Extras
Small extras are where builders get caught. A £60 item does not feel worth formal paperwork. But twenty £60 items is £1,200, before labour.
You can keep this practical by using a running variation log. Record every small extra as it happens, then issue one combined weekly variation for approval. That keeps admin down without losing the money.
Use Plain Language With Clients
Clients usually accept variations when they understand the reason. They get frustrated when it feels like surprise billing. Use clear wording:
- “This was not included in the accepted quote.”
- “The existing wall condition was hidden until opening up.”
- “This changes the agreed specification from standard white fittings to brushed brass.”
- “This adds one labour day and moves completion by one day.”
Protect the Relationship and the Margin
Charging for variations is not about being difficult. It is about keeping the job honest. The client gets clarity and control. You get paid for the work you actually do.
QuoteBuild keeps variations tied to the original job, so the accepted quote, extras, and live margin stay readable. See how QuoteBuild handles the job workflow or start with the trial.