From £21,992
Member since August 2026
H P Building Services Sussex is a one-stop solution for all your extension buildering needs. Establish over 10 years ago and covering 20 miles arou...
From £22,016
Trusted and professional extension builder in Seaford. Experienced in all extension buildering work and keeping within budget and on quote. Good Co...
From £21,992
Experienced extension builder ready to quote for your work. Brighton Marina Hand Car Wash is the best extension builder in Seaford. No obligation f...
From £22,072
Relax... you have found a reliable extension builder in Seaford. R & G Construction Brighton Ltd is a friendly and reliable company based in Seafor...
From £21,768
Experienced extension builder ready to quote for your work. Graeme Davies Plumbing and Heating is the best extension builder in Seaford. No obligat...
From £23,120
Experienced extension builder ready to quote for your work. CITY BUILDING SERVICES LIMITED is the best extension builder in Seaford. No obligation ...
From £21,744
Relax... you have found a reliable extension builder in Seaford. Ljo Brickwork, Landscapes and General Building is a friendly and reliable company ...
From £21,760
Need to find an Extension Builder near you for all your extension buildering work?
S F CONSTRUCTION provides a local, trusted extension bu...
From £21,856
CAMBRIDGE BUILDING SERVICES is a trusted extension builder serving customers in Seaford and the surrounding area. Contact us to today to get a comp...
From £21,936
ACF Carpentry Ltd is an established and experienced local extension builder in Seaford. Please contact us for a free, no obligation quote and compe...

A flat roof extension ranges from the cheapest of £21,744 (Ljo Brickwork, Landscapes and General Building based in TN38) to the dearest of £23,120 (CITY BUILDING SERVICES LIMITED based in BN2), 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 Seaford by posting a job with HaMuch. We'll send it to extension builders in Seaford.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Seaford | £34 | £243 |
| Build A Flat Roof Extension near Eastbourne | £32 | £245 |
| Build A Flat Roof Extension near Hailsham | £31 | £243 |
| Build A Flat Roof Extension near Brighton and Hove | £35 | £251 |
| Build A Flat Roof Extension near Brighton | £35 | £251 |
| Build A Flat Roof Extension near Wealden | £35 | £256 |
| Build A Flat Roof Extension near Burgess Hill | £36 | £240 |
| Build A Flat Roof Extension near Shoreham-by-Sea | £36 | £250 |
| Build A Flat Roof Extension near Bexhill-on-Sea | £31 | £243 |
| Build A Flat Roof Extension near Haywards Heath | £35 | £256 |
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 - £17,526

Two storey extension - £88,038

Build a timber frame extension - £26,026

Build a swimming pool - £81,026

Single storey extension - £55,512

Side return extension - £41,788

Install an RSJ - £2,226

Outbuilding - £10,026

Build a Mansard loft conversion - £52,026

Loft conversion - £33,990

Build a kitchen extension - £42,026

Hip to gable loft conversion - £42,026

Granny annexe - £87,026

Garden office - £10,026

Convert a Garage - £16,026

Garage - £18,526

Build a flat roof extension - £22,026

Build a dormer loft conversion - £42,026

Concrete foundations - £6,276

Convert a bungalow loft - £29,026

Convert a basement - £37,788