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John Addis
Our building services company JAB Home Improvements helps customers in Milton Keynes and the surrounding area by providing professional, trustworth...
Buckingham, MK18
Relax... you have found a reliable extension builder in Buckingham. D Beagle Building Contractors is a friendly and reliable company based in Bucki...
We are Cognitive Construction, a forward-thinking design & build company.Our houses are our castles and we take great pride in transforming homes a...

A flat roof extension ranges from the cheapest of £22,016 (D Beagle Building Contractors based in MK18) to the dearest of £22,496 (JAB based in MK4), 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 Buckingham by posting a job with HaMuch. We'll send it to extension builders in Buckingham.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Aylesbury Vale | £36 | £246 |
| Build A Flat Roof Extension near Bicester | £35 | £249 |
| Build A Flat Roof Extension near Milton Keynes | £39 | £263 |
| Build A Flat Roof Extension near Bletchley | £39 | £265 |
| Build A Flat Roof Extension near Cherwell | £35 | £249 |
| Build A Flat Roof Extension near Aylesbury | £42 | £270 |
| Build A Flat Roof Extension near Leighton Buzzard | £38 | £270 |
| Build A Flat Roof Extension near Banbury | £33 | £239 |
| Build A Flat Roof Extension near Northampton | £35 | £239 |
| Build A Flat Roof Extension near Dunstable | £41 | £274 |
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 - £17,695

Two storey extension - £88,292

Build a timber frame extension - £26,195

Build a swimming pool - £81,195

Single storey extension - £58,893

Side return extension - £43,690

Install an RSJ - £2,395

Outbuilding - £10,195

Build a Mansard loft conversion - £52,195

Loft conversion - £35,575

Build a kitchen extension - £42,195

Hip to gable loft conversion - £42,195

Granny annexe - £87,195

Garden office - £10,195

Convert a Garage - £16,195

Garage - £18,695

Build a flat roof extension - £22,195

Build a dormer loft conversion - £42,195

Concrete foundations - £6,445

Convert a bungalow loft - £29,195

Convert a basement - £39,690