The customer asked for extra work. What should you do before starting?
The customer is standing beside you on site and says:
‘While you are here, could you move that doorway and add two sockets?’
It sounds simple. You know how to do it. Stopping to write something down feels awkward and slow.
This is precisely the moment to record the change.
Not because you distrust the customer. Because three months later neither of you will remember the whole conversation as clearly as you do now.
When a conversation becomes a variation
Raise a variation when the request would change any accepted part of the project, including:
scope;
price;
specification;
programme;
responsibility;
completion criteria;
milestone or funding requirement.
If the customer is only asking a question, answer it first. If they are choosing between products already covered by an allowance, record the selection and any budget effect. If they are asking you to deliver a different or additional result, it is likely to need a variation.
Why a verbal yes is risky
You may believe the customer has authorised the work. The customer may believe you have confirmed it is included.
The missing details often include:
exact location or quantity;
labour and material cost;
VAT;
making good;
effect on other trades;
delay;
whether the original item is removed or retained;
when payment will become due.
The dispute is rarely caused by whether the conversation happened. It is caused by what each person thought the conversation meant.
What to record
A useful variation should show:
1The original agreed item.
2The customer’s requested change.
3Your proposed solution.
4Labour, materials, subcontractor and margin treatment as appropriate.
5Cost increase, decrease or no cost effect.
6Programme and sequencing effect.
7Any decision needed from the customer.
8Evidence, marked-up drawing or product information.
9The response or approval required before you proceed.
This does not need to become a long contract document for every small change. It needs enough information for both people to recognise the same agreement later.
A worked example
The customer asks for six additional sockets during electrical first fix. You create a change against the first-fix electrical work.
Change to first-fix electrics
Six extra double sockets
Waiting for the customer
What is changing?
Add six double sockets at the marked locations. Includes cable, back boxes, labour and making good within the current first-fix sequence.
Price
£780 including VAT
Programme
No programme change if accepted by 4 pm today
Sent to the customer before the work starts.
The customer asks whether two locations could use the existing circuit arrangement and reduce the cost. You revise the proposal to £690. They accept. The work and evidence remain attached to that decision.
At final account, the additional sum is not a surprise. The record shows why it exists.
What if you forgot to include something in the quote?
Do not assume an omission becomes a customer-funded variation simply because it costs you money. Ask:
Was the work already included in the described outcome?
Was it expressly excluded?
Did the quote contain a relevant assumption or allowance?
Has the customer changed the requirement?
Did a genuinely unforeseen condition arise?
What does the contract say?
The legal and commercial position depends on the agreement and facts. Be transparent early. Trying to disguise an estimating error as an unforeseen change damages trust and may not create a recoverable entitlement.
What if the work cannot wait?
Some urgent conditions involve safety, weather exposure, damage prevention or sequencing. If waiting for ordinary approval is genuinely impractical:
record the condition immediately;
explain why delay would cause harm or additional cost;
identify the authority or contract provision you rely on;
take proportionate photographs or other evidence;
state the minimum work undertaken;
notify the customer promptly;
create the full record as soon as possible.
Emergency should not become a routine justification for retrospective pricing.
What if the customer does not respond?
Do not continue silently and hope approval appears later.
Use the agreed project process. That may involve a reminder, a response deadline, pausing the affected work, continuing unrelated work or escalating to a professional. The precise consequence depends on the contract and Assurr workflow.
The important commercial rule is simple: do not accumulate avoidable unapproved exposure.
How Assurr helps
Assurr keeps the variation linked to the work it changes. The customer can see the original agreement, reason, price, timing, evidence and available response. Questions and revisions remain attached. If accepted, the relevant project version and financial position update.
Assurr does not decide whether you are legally entitled to charge the variation or whether the price is correct. It makes the proposal and decision far harder to misunderstand later.
Trade checklist
Before starting changed work, confirm:
the request is clearly described
the original scope is visible
cost or credit is stated
VAT is clear
timing and downstream effects are stated
evidence or drawing is attached where useful
the correct person has accepted
funding consequences are addressed
the accepted version is in the shared project record
Good trades already know that changes need managing. Assurr’s role is to make it easier to prove that you managed them fairly.