From £22,208
Relax... you have found a reliable extension builder in HP5. M P TIMLIN (CONSTRUCTION) LTD is a friendly and reliable company based in HP5 who cons...
From £22,024
Trusted and professional extension builder in HP5. Experienced in all extension buildering work and keeping within budget and on quote. ALEXANDER C...
From £22,416
Relax... you have found a reliable extension builder in HP5. GURNEY CONSTRUCTION is a friendly and reliable company based in HP5 who consider no jo...
From £22,176
Beech is an established and experienced local extension builder in HP5. Please contact us for a free, no obligation quote and competitive rates. Co...
From £22,352
Distinct Build Ltd. has been built purely on referrals. We care about our client's ideas and needs and work tirelessly to deliver their dreams.
...From £22,232
Our building services company Headline Construction Ltd have twenty years experience and have been helping customers in Berkhamstead, Milton Keynes...
From £22,288
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £22,152
Hamilton Refurbishments is an established and experienced local extension builder in HP5. Please contact us for a free, no obligation quote and com...
From £22,256
Need an Extension Builder in HP5? Mitre Peak Lofts Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for man...
From £22,368
I GIBBS BUILDING SERVICES is an established extension buildering business in HP5. We come highly recommended and provide competitive quotes for you...

A flat roof extension ranges from the cheapest of £22,024 (ALEXANDER CONSTRUCTION based in HP5) to the dearest of £22,416 (GURNEY CONSTRUCTION based in HP5), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in HP5 by posting a job with HaMuch. We'll send it to extension builders in HP5.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Chesham | £42 | £277 |
| Build A Flat Roof Extension near Berkhamsted | £41 | £263 |
| Build A Flat Roof Extension near Dacorum | £42 | £269 |
| Build A Flat Roof Extension near Hemel Hempstead | £42 | £270 |
| Build A Flat Roof Extension near Hazlemere | £40 | £272 |
| Build A Flat Roof Extension near Rickmansworth | £42 | £278 |
| Build A Flat Roof Extension near Gerrards Cross | £43 | £282 |
| Build A Flat Roof Extension near High Wycombe | £39 | £272 |
| Build A Flat Roof Extension near Watford | £43 | £278 |
| Build A Flat Roof Extension near Wycombe | £39 | £271 |
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.

Underpin a building - £17,747

Two storey extension - £88,371

Build a timber frame extension - £26,247

Build a swimming pool - £81,247

Single storey extension - £59,944

Side return extension - £44,281

Install an RSJ - £2,447

Outbuilding - £10,247

Build a Mansard loft conversion - £52,247

Loft conversion - £36,068

Build a kitchen extension - £42,247

Hip to gable loft conversion - £42,247

Granny annexe - £87,247

Garden office - £10,247

Convert a Garage - £16,247

Garage - £18,747

Build a flat roof extension - £22,247

Build a dormer loft conversion - £42,247

Concrete foundations - £6,497

Convert a bungalow loft - £29,247

Convert a basement - £40,281