Local MK1 extension builders
A J S Building Work
£40/hour
£278/day
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Two single bedroom" - JULIANA, MK8
"Timber frame first floor extension above the garage, with outer leaf brickwork and tiled pitched roof above." - A, MK6
Go-Large Design & Build Ltd
£39/hour
£261/day
Need to find an Extension Builder near you for all your extension buildering work?
Go-Large Design & Build Ltd provides a local, trusted ex...
"Kitchen extension" - MILTON KEYNES
Custom Glaze
£40/hour
£268/day
Established over 34 years ago, we are a family run and independent business committed to our founding principle of providing our customers with hig...
"Garage conversion to a kitchen" - CONNIE, MILTON KEYNES
BURCROFT BUILDERS
£45/hour
£302/day
BURCROFT BUILDERS is an established and experienced local extension builder in MK1. Please contact us for a free, no obligation quote and competiti...
"Garage conversion" - MILTON KEYNES
Building Better Spaces
£38/hour
£258/day
At Building Better Spaces we have been fitting bespoke bathrooms for ten years.We pride ourselves on being the go-to bathroom fitters for d...
"Single storey extension" - MILTON KEYNES
Highland Homes & Gardens
£35/hour
£231/day
Need an Extension Builder in MK1? Highland Homes & Gardens has been helping local clients (20 mile radius) with their extension buildering jobs for...
"Loft conversion with dormer" - ANTONIO, MK3
Dallcompanies Limited
£39/hour
£269/day
Our building services company Dallcompanies Limited was established in May 2023, but have been helping customers in Milton Keynes and the surroundi...
"Outbuilding" - MK3
GD RAWLINGS BUILDING
£38/hour
£258/day
Relax... you have found a reliable extension builder in MK1. GD RAWLINGS BUILDING is a friendly and reliable company based in MK1 who consider no j...
"Loft conversion Velux conversion" - POOJA, MILTON KEYNES
HydroGas Services Ltd
£41/hour
£280/day
I am a British Gas trained engineer with a vast knowledge of all gas, central heating, and plumbing systems. Now working independently, I provide i...
"Loft conversion" - MILTON KEYNES
Langton Build
£39/hour
£255/day
Trusted and professional extension builder in MK1. Experienced in all extension buildering work and keeping within budget and on quote. Langton Bui...
Asanta Builder
£43/hour
£284/day
Need to find an Extension Builder near you for all your extension buildering work?
Asanta Builder provides a local, trusted extension build...
JAB
£46/hour
£312/day
Our building services company JAB Home Improvements helps customers in Milton Keynes and the surrounding area by providing professional, trustworth...
STARGRADE CONSTRUCTION LTD
£43/hour
£299/day
Need an Extension Builder in MK1? STARGRADE CONSTRUCTION LTD has been helping local clients (20 mile radius) with their extension buildering jobs f...
The most important thing is do avoid handing over cash or paying large sums in advance. Be wary of paying cash for a cheaper job, i.e. to avoid VAT, you may be going down a slippery slope of not doing things properly which may eventually mean your job is also not done properly.
Agree when you intend to pay, ideally after you are satisfied with the completed job. If it is a big job agree a schedule of staged payments which is fair to both parties.
To avoid bad tradespeople and to ensure you can find them should they not answer a mobile;
- Get proper contact details and check them yourself
- Check if the company is verified on the Companies House website
- Get phone details, ideally a land line or 0800 number and check it
- Get a physical office address
Get quotes in writing by email or in person if possible. Getting quotes online or by text is ok (make sure you accept the offer by replying). For large projects make a written agreement, schedule of works and snagging plans as part of a working document. Also;
- Agree expected quality of workmanship and materials in advance
- When will work start and when will project be finished, what happens if project over runs ?
- How long is the guarantee on work and materials eg 12 months
- Discuss onsite behaviour in advance (no smoking, swearing or using mobile phones for non-work purposes)
- Agree that your Extension Builder will remove all debris and rubbish and what level of tidying up you want after job
Compare MK1 extension builders rates
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Extension Builders near Bletchley | £34 | £227 |
| Extension Builders near Milton Keynes | £33 | £226 |
| Extension Builders near Leighton Buzzard | £33 | £235 |
| Extension Builders near Ampthill | £31 | £214 |
| Extension Builders near Mid Bedfordshire | £34 | £225 |
| Extension Builders near Aylesbury Vale | £34 | £230 |
| Extension Builders near Dunstable | £36 | £235 |
| Extension Builders near Aylesbury | £36 | £236 |
| Extension Builders near Kempston | £37 | £230 |
| Extension Builders near Bedford | £38 | £233 |
Job estimates from extension builders near you
Whether you’re looking to extend your kitchen with a side return extension or you want to convert your basement into a liveable space, read our cost guides to get an idea of how much each project costs before getting a more accurate quote from our database of reliable tradespeople.

Build a timber frame extension - £26,168

Garden office - £10,168

Granny annexe - £87,168

Build a flat roof extension - £22,168

Convert a Garage - £16,168

Hip to gable loft conversion - £42,168

Convert a bungalow loft - £29,168

Build a dormer loft conversion - £42,168

Build a swimming pool - £81,168

Build a Mansard loft conversion - £52,168

Concrete foundations - £6,418

Underpin a building - £17,668

Two storey extension - £88,252

Convert a basement - £39,390

Side return extension - £43,390

Loft conversion - £35,325

Garage - £18,668

Single storey extension - £58,360

Outbuilding - £10,168

Install an RSJ - £2,368

Build a kitchen extension - £42,168
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