From £21,864
BEAUTIFUL CONVERSIONS, RESTORATIONS AND NEW BUILDSPhoenix Design and Construction are a main contractor and builder delivering beautiful conversion...
From £21,728
Only Lifts Ltd is an established extension buildering business in TN40. We come highly recommended and provide competitive quotes for your work.
From £21,744
Relax... you have found a reliable extension builder in TN40. Ljo Brickwork, Landscapes and General Building is a friendly and reliable company bas...
From £21,872
Ansell Builders is a trusted extension builder serving customers in TN40 and the surrounding area. Contact us to today to get a competitive quote f...
From £21,920
Need to find an Extension Builder near you for all your extension buildering work?
CP Building Renovations provides a local, trusted extens...
From £22,464
Relax... you have found a reliable extension builder in TN40. ALTERATION AND CONSTRUCTION is a friendly and reliable company based in TN40 who cons...
From £21,800
Mitchell Building Services UK Ltd is well established among the leading names for extension and property improvement in and around East Sussex.
...From £21,912
Protech Construction Design Ltd is an established extension buildering business in TN40. We come highly recommended and provide competitive quotes ...
From £22,176
Need to find an Extension Builder near you for all your extension buildering work?
ASHVALE CONSTRUCTION LTD provides a local, trusted exten...

A flat roof extension ranges from the cheapest of £21,728 (Only Lifts Ltd based in TN39) to the dearest of £22,464 (ALTERATION AND CONSTRUCTION based in TN38), 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 TN40 by posting a job with HaMuch. We'll send it to extension builders in TN40.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Bexhill-on-Sea | £27 | £209 |
| Build A Flat Roof Extension near Hastings | £27 | £209 |
| Build A Flat Roof Extension near Hailsham | £28 | £215 |
| Build A Flat Roof Extension near Eastbourne | £28 | £213 |
| Build A Flat Roof Extension near Wealden | £30 | £219 |
| Build A Flat Roof Extension near Seaford | £30 | £214 |
| Build A Flat Roof Extension near Crowborough | £31 | £225 |
| Build A Flat Roof Extension near Tunbridge Wells | £33 | £228 |
| Build A Flat Roof Extension near Tonbridge | £33 | £226 |
| Build A Flat Roof Extension near Ashford | £30 | £213 |
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 - £17,458

Two storey extension - £87,938

Build a timber frame extension - £25,958

Build a swimming pool - £80,958

Single storey extension - £54,168

Side return extension - £41,032

Install an RSJ - £2,158

Outbuilding - £9,958

Build a Mansard loft conversion - £51,958

Loft conversion - £33,360

Build a kitchen extension - £41,958

Hip to gable loft conversion - £41,958

Granny annexe - £86,958

Garden office - £9,958

Convert a Garage - £15,958

Garage - £18,458

Build a flat roof extension - £21,958

Build a dormer loft conversion - £41,958

Concrete foundations - £6,208

Convert a bungalow loft - £28,958

Convert a basement - £37,032