They’re up at dawn.
Covered in dust by nine.
Still going when the sun goes down.
So you’d think builders would be used to pressure.
But some things still push them over the edge.
We spoke to builders across the UK.
Here’s what gets on their nerves—and how you can avoid being that client.
“Changing your mind every five minutes”
This came up over and over again.
Builders aren’t magicians.
They can’t rip up finished work without time, money and mess.
If you want to move the bathroom sink again, don’t expect it to be free—or fast.
Roy who works for Libra Construction said:
“I had a client who changed the kitchen layout three times after we’d already started. Cost them double. Not because we’re greedy. Because it takes time to undo everything.”
“Unrealistic timelines”
Your cousin’s builder might’ve finished his extension in four weeks.
That doesn’t mean yours will.
Drying time, weather delays, material shortages—things happen.
But some clients still expect it done by next Friday.
Another builder from A2 Building told us:
“The worst thing is when people book their kitchen fitter before the roof’s even on. Then they get angry when we’re behind schedule. Don’t stack trades like dominoes.”
“Cheap materials from dodgy websites”
There’s a reason some tiles cost £10 and others £50.
The cheap ones crack.
The grout doesn’t stick.
The colours fade.
You save a few pounds, but your builder has to spend hours trying to fit junk that won’t line up.
One told us:
“A customer bought taps from an online shop in China. No washers. No thread. Useless. Then blamed me when they leaked.”
“No decision-makers on site”
Some builders waste hours waiting for decisions.
Where do you want the light switch?
Which way should the door open?
Do you want brushed chrome or matt black handles?
If no one’s home, nothing gets done.
And no, “I’ll ask my partner tonight” doesn’t help.
“Last-minute surprises”
Builders hate being caught out.
“Oh, by the way, we’re also thinking of knocking through this wall.”
Or: “Can you quickly add a window here?”
Quickly? No.
That needs planning, structure checks, drawings—and approval.
One builder said:
“I don’t mind changes. But don’t spring them on me when the skip’s already full.”
“Holding back payment for no reason”
Most builders work on trust.
Stage payments cover materials and wages.
Withholding payment to ‘make sure it’s all finished’ breaks that trust.
If you’re not happy, speak up.
But don’t hold their money hostage over a bit of dust.
“Thinking we’re all crooks”
This one stings.
Yes, there are bad builders out there.
But most work hard, care about their trade, and want to do a good job.
Treat them like liars, and don’t be surprised if they walk.
Don’t be that client
Builders can put up with long hours, bad weather and heavy lifting.
But they don’t have time for poor planning or shifting demands.
Be clear.
Be fair.
Pay on time.
You’ll get a better job—and your builder might even smile.
FAQs
Can I change my mind during the build?
Yes, but expect delays and added cost. Major changes can affect structure, plumbing, and wiring. Always speak to your builder before making a decision.
Why do builders need stage payments?
They use the money to buy materials and pay their team. Delaying payment can slow down or even stop the job altogether.
How long does a typical house extension take?
Most take between 10 and 16 weeks, depending on size, weather, and availability of materials. Rushing usually leads to mistakes.
Should I supply my own materials?
Only if you know what you’re doing. Cheap or wrong parts can cost more in labour. Builders often get better deals and know what works.
What if I’m not happy with something?
Speak to your builder straight away. Good communication solves most problems before they grow. Don’t wait until the end to complain.