Guide — mistakes & change orders
What a change order actually costs.
Not the number on the form. A change order is a small price for the work plus a much larger price for everything the work disturbs, and the second half is the one nobody quotes you in advance.
What a change order is.
A written amendment to the construction contract: what is changing, what it costs, and what it does to the schedule, signed by both sides before the work happens. It exists to protect everyone, and a builder who documents changes properly is a builder doing their job.
The paperwork is not the problem. The problem is what the change is attached to.
The five costs stacked inside one change.
The new work. The part everyone expects: the materials and labour to build the thing you now want. On its own it is usually the smallest line.
The undoing. Whatever already exists in that spot has to come out first, and demolition is labour with nothing to show for it. Moving a wall that is framed means the framing, the header, the blocking, and the fasteners in the subfloor.
The trades behind it. This is the multiplier people miss. A wall is rarely just a wall — there is electrical in it, possibly plumbing, possibly a duct run, and insulation around it. Move the wall and each of those trades has to come back, in the right order, to redo work they had already finished and been paid for.
The schedule. Trades are booked in sequence across several jobs. A trade that has to return does not return tomorrow; they return when their next gap is, and every trade queued behind them slides too. A change worth a modest amount of work can cost weeks, and on a construction loan weeks are money with an interest rate attached.
The premium. Change-order work is priced differently from contracted work, and reasonably so: it is unplanned, it is disruptive, it is often a small quantity of something ordered at a small-quantity price, and it carries risk the original bid did not.
Why the same change has four different prices.
Moving one interior wall two feet is not one thing. It is four, depending entirely on when you ask.
While it is a drawing: a redline. Someone updates the sheet. There is no material, no labour, no sequence to disturb.
After the pour, before framing: still cheap, if the wall is not on the foundation. The plan changes and the framers build the new version first time.
After framing, before mechanical rough-in: now it is real. Demolition, re-framing, and a re-inspection, but the trades have not been in yet, so the multiplier has not engaged.
After rough-in, or after drywall: the expensive one. Every trade in that wall comes back, in order, and each of them is being paid twice for the same run. Drywall, tape, texture and paint follow. This is where a change most people think of as small stops being small.
The change did not get bigger. Its context did.
Why most change orders are not mistakes.
Very few come from an error in the drawings. Most come from a client who approved a plan they could not really picture, walked the framed house for the first time, and discovered something they would have said months earlier if they had been able to see it.
"The hallway is narrower than I thought." "I did not realise you would see the bathroom from the front door." "The kitchen feels small." Every one of those is a reasonable reaction, arriving at the most expensive possible moment. Framing is the first time a plan becomes a space, and until that week the client had a drawing and their imagination.
Which means the useful question is not how to price change orders better. It is how to move that first reaction earlier.
How to have the reaction sooner.
Learn to read the sheet properly, so you are reviewing a document rather than nodding at a picture — the reading guide covers what to look at. Know the mistakes that recur, because they recur for structural reasons and you can check for them deliberately. Tape out the critical dimensions somewhere if you can.
Or walk the plan at full size before anything is built, which is the whole reason this studio exists. Your plan is projected 1:1 on the floor and you walk it at the size it will be, so the "the hallway is narrower than I thought" moment happens while the fix is still a redline rather than a signature on a form. Builders use it for exactly this reason — see walkthroughs for custom home builders.
Common questions.
Why are change orders so expensive?
Because the new work is the smallest part of it. You are also paying to undo what is there, to bring back every trade whose finished work is inside the affected area, and for the schedule slip while those trades find a gap to return in. Change-order work is also priced at a premium, since it is unplanned and often a small quantity.
When does a change stop being cheap?
There are three cliffs. The foundation pour fixes the footprint. Framing fixes wall positions. The mechanical rough-in puts electrical, plumbing and ducting inside those walls, and that is the point where one change starts pulling several trades back with it.
Are change orders a sign of a bad builder?
Usually the opposite. A builder who writes changes up properly, prices them, and gets them signed before starting is protecting both sides. What matters is the volume and the cause: changes driven by drawing errors are a competence question, and changes driven by a client seeing the space for the first time are a communication problem the industry has never really solved.
How do builders reduce change orders?
By making the client see the house before it exists rather than after. Detailed selections early, plan reviews the client genuinely understands, and increasingly a full-scale walkthrough — anything that moves the client's first real reaction to the space earlier than the framing stage.
Can I refuse to sign a change order?
Yes, and then the work does not happen and the contract stands as written. That is what the form is for: it is the moment where both parties agree the scope has changed and what that costs. Read what it does to the schedule, not just the price — the delay is often the larger number.
Nearby & related.
Walk it before you build it.
Have the reaction before the framing.
The change order you never write is the cheapest one. Walk the plan at full size while everything is still a redline. The first 30 minutes are free.