From £22,016
Trusted and professional extension builder in March. Experienced in all extension buildering work and keeping within budget and on quote. PAUL BARR...
From £21,872
Oakenshield Construction Ltd is an established and experienced local extension builder in March. Please contact us for a free, no obligation quote ...
From £22,080
Need an Extension Builder in March? AVALON CONSTRUCTION has been helping local clients (20 mile radius) with their extension buildering jobs for ma...
From £21,880
PROCTOR CONSTRUCTION LTD is an established extension buildering business in March. We come highly recommended and provide competitive quotes for yo...
From £21,920
Trusted and professional extension builder in March. Experienced in all extension buildering work and keeping within budget and on quote. RBAM Cons...
From £22,016
Need to find an Extension Builder near you for all your extension buildering work?
A Sindall Building provides a local, trusted extension b...
From £21,856
TAYLOR DRIVER CONSTRUCTION LTD is a trusted extension builder serving customers in March and the surrounding area. Contact us to today to get a com...
From £21,992
R&Z Group Ltd is a trusted extension builder serving customers in March and the surrounding area. Contact us to today to get a competitive quote fo...
From £22,032
LITTLEPORT TIMBER BUILDINGS are here to help customers who need an Extension Builder in March. We offer a competitive rate to complete all your ext...
From £22,040
Need to find an Extension Builder near you for all your extension buildering work?
ADK Builders & Plumbers provides a local, trusted extens...

A flat roof extension ranges from the cheapest of £21,856 (TAYLOR DRIVER CONSTRUCTION LTD based in CB6) to the dearest of £22,080 (AVALON CONSTRUCTION based in PE14), 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 March by posting a job with HaMuch. We'll send it to extension builders in March.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Wisbech | £34 | £255 |
| Build A Flat Roof Extension near Peterborough | £40 | £281 |
| Build A Flat Roof Extension near Ely | £40 | £279 |
| Build A Flat Roof Extension near Huntingdonshire | £36 | £290 |
| Build A Flat Roof Extension near Huntingdon | £38 | £284 |
| Build A Flat Roof Extension near Spalding | £32 | £238 |
| Build A Flat Roof Extension near King's Lynn | £33 | £254 |
| Build A Flat Roof Extension near Cambridge | £38 | £271 |
| Build A Flat Roof Extension near Kings Lynn & West Norfolk | £31 | £238 |
| Build A Flat Roof Extension near St Neots | £51 | £318 |
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 - £17,470

Two storey extension - £87,956

Build a timber frame extension - £25,970

Build a swimming pool - £80,970

Single storey extension - £54,408

Side return extension - £41,167

Install an RSJ - £2,170

Outbuilding - £9,970

Build a Mansard loft conversion - £51,970

Loft conversion - £33,473

Build a kitchen extension - £41,970

Hip to gable loft conversion - £41,970

Granny annexe - £86,970

Garden office - £9,970

Convert a Garage - £15,970

Garage - £18,470

Build a flat roof extension - £21,970

Build a dormer loft conversion - £41,970

Concrete foundations - £6,220

Convert a bungalow loft - £28,970

Convert a basement - £37,167