3 Rules for Handling Change Orders in Construction
Why change orders cause more disputes than anything else on renovation jobs
Renovation work is, by nature, variable. Plaster comes off walls and reveals a problem. A client sees the layout taking shape and changes their mind about a finish. A material goes on backorder and needs a substitute. The jobs that run cleanly are not the ones with no variations. They are the ones where every variation has been captured, priced, and agreed before it happened.
The pattern that creates trouble is almost always the same: a conversation happens on site, a decision is made verbally, the work is done, and the invoice arrives later with an amount that neither side remembers agreeing to in exactly those terms. That single pattern accounts for the majority of held-balance disputes we see.
Rule 1 — captured in writing, every time
The first rule is the unglamorous one. Every change, however small, gets captured in writing. That does not mean a new contract. It means a short written record of the change, the price, and the person it was agreed with.
A text message confirming the swap, the price, and a request to proceed is adequate capture. An email with the same content is adequate capture. An entry into a change order log on Renno is adequate capture. A verbal agreement on site is not.
Rule 2 — priced before the work starts
Pricing a variation before the work starts is the rule that keeps the change-order conversation from becoming a negotiation after the fact. If the variation is priced after, the client can always argue that the figure feels high. If it is priced before, the argument is closed before the work begins.
Pricing a variation in real time, on site, is harder than it sounds. The patterns that work:
- For small, familiar changes, price on the spot. A tile upgrade, a socket moved, a skirting variant. You know the delta. Write it down, quote it, get agreement, do it.
- For medium changes, quote same-day. A floor level adjustment, an additional run of pipework. Leave site, send the client a written quote within the same working day, proceed only on agreement.
- For large changes, quote next-day with a proper change order. A new wall, a moved kitchen layout, a structural element. Treat these as mini-quotes within the main quote, with scope, materials, labour, impact on end date, and impact on stage payments.
A change priced in real time is not casual — it is disciplined. The discipline is that the price is quoted before, not after.
Rule 3 — agreed by both sides before the varied work proceeds
Agreement means the client has replied, in writing, confirming the change. “OK” by text is agreement. An email reply with “yes please” is agreement. A signed variation on paper is agreement. A nod of the head on site is not agreement.
This rule is the one contractors skip most often, usually because the client is standing there and the work has to happen today to stay on schedule. The practical fix: have the client reply by text or by signing a quick digital change order before you pick up the tool. The 90 seconds it takes in the moment is far cheaper than the 90 minutes of debate at handover if it is not agreed.
Variation handled well vs variation handled loosely
| Loose handling | Three-rule handling | |
|---|---|---|
| What was said | "We agreed to move the socket" | "Client agreed by text on Tuesday to move the socket for £60. Text saved." |
| Price agreement | "We'll sort it at the end" | "£60 net, agreed before the work started" |
| Impact on end date | Unmentioned | "No impact" or "+1 working day" documented |
| Impact on stage payments | Added to final invoice | Added to the next stage or logged as a separate line |
| At handover | Debated | Noted, signed off |
| Risk of held balance | High | Near zero |
How to introduce a variation so the client says yes faster
On a good job, you are introducing two to five variations a week — substitutions, minor upgrades, small additions. The fastest way to get a yes on each of them is to structure the ask the same way every time.
The three-line template that works:
“While we were stripping the wall in the spare room, we found the joists aren’t level — there’s about a 15mm drop across 2 metres. I can level it before flooring for an additional £280, or leave it and you may see a slight lip under the floor finish. I’d recommend levelling. If you’re happy, reply ‘yes’ and I’ll add it to your change order log.”
Three things are doing the work. A one-line context (“while we were stripping…”) so the client knows it is real and not invented. A clear option with a number. A specific “reply yes” so the agreement is in writing by the time the work starts.
What to do when a client refuses to pay for an agreed and completed variation
It happens rarely, but when it does, the resolution is easier the more disciplined you have been on the three rules.
- If the variation was captured in writing, priced, and agreed: you have a short paper trail that settles the discussion. Resolution is almost always a 15-minute conversation.
- If the variation was priced but not confirmed in writing: you are relying on the client’s goodwill. Most clients will honour an agreement they made, but you do not want to find out on the uncooperative ones.
- If the variation was done without written agreement: recovery depends on UK or NL consumer-law positions on work done without a written variation clause.
The change order log as a single-page reference
The easiest tool on any renovation over £10,000 is a running change order log. One page, updated as variations happen.
| # | Date | Change | Price | Impact on end date | Agreed by | How agreed |
|---|---|---|---|---|---|---|
| 1 | 12 May | Level joists in spare room | +£280 | No impact | Client | Text |
| 2 | 14 May | Upgrade kitchen tap to Grohe Eurocube | +£120 | No impact | Client | |
| 3 | 17 May | Add extractor fan to utility room | +£340 | +1 working day | Client | Signed change order |
| 4 | 21 May | Remove planned feature wall, keep plaster | –£180 | No impact | Client | Text |
This one sheet is the reference at handover. Almost every change-order dispute dissolves the moment a well-maintained log is visible.
Frequently asked questions
Is a text message really enough to confirm a variation?
Yes, in both UK and NL consumer contexts, a clear agreement in writing — including by text or email — is generally adequate to establish agreement to a variation. What matters is that the text shows the change, the price, and a clear "yes" from the client. Vague agreement is weaker; specific agreement is strong.
What if a client disagrees with a price after the work is done?
If the price was agreed before the work, the answer is the paper trail. If the price was not agreed before the work, you are negotiating, and the right pattern is to settle for the midpoint of what is reasonable — not to escalate a small amount into a relationship-breaking dispute.
How small is too small to write down?
There is no such thing as too small. A £25 change still goes in the log. The cost of writing it down is seconds. The cost of not writing down a cluster of small changes that adds up to £900 across a job is a very uncomfortable conversation at the end.
Do I need to re-issue the whole quote when a variation is agreed?
No. The change order log is the running document. Re-issuing the quote every time adds work without adding clarity. Re-issue a "quote as of" version if three or more changes have accumulated and you want a consolidated view — but day to day, the log is enough.
What about variations the client proposed verbally and I forgot to capture?
Recreate the log entry now, send it to the client as "just catching up my log from last week, confirming we agreed...". Most clients will confirm it, and the record is then in writing. If they dispute it, you have learned something and will capture next time.
Should change orders affect the stage payment or be invoiced separately?
For changes that fall within a stage, adjust the stage amount on the payment structure and release at the stage as normal. For changes that cross stages or are large, a separate stage payment is cleaner. On Renno, the wallet is adjusted as the log updates — the client sees the new total.
What if a variation requires re-ordering materials and the lead time pushes the end date?
The change order entry should state the impact on the end date. "Levelling joists in spare room: +1 working day. Expected completion now week 12 + 1 working day." Clients accept a dated impact far more readily than an undated one.
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