Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
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 £22,208
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 £22,176
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...

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 | £40 | £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 - £17,742

Two storey extension - £88,363

Build a timber frame extension - £26,242

Build a swimming pool - £81,242

Single storey extension - £59,846

Side return extension - £44,226

Install an RSJ - £2,442

Outbuilding - £10,242

Build a Mansard loft conversion - £52,242

Loft conversion - £36,021

Build a kitchen extension - £42,242

Hip to gable loft conversion - £42,242

Granny annexe - £87,242

Garden office - £10,242

Convert a Garage - £16,242

Garage - £18,742

Build a flat roof extension - £22,242

Build a dormer loft conversion - £42,242

Concrete foundations - £6,492

Convert a bungalow loft - £29,242

Convert a basement - £40,226