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Graeme Davies
Experienced extension builder ready to quote for your work. Graeme Davies Plumbing and Heating is the best extension builder in Lancing. No obligat...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Trusted and professional extension builder in Lancing. Experienced in all extension buildering work and keeping within budget and on quote. Stretch...
M Wesley General Builder & Property Maintenance is a trusted extension builder serving customers in Lancing and the surrounding area. Contact us to...
Need to find an Extension Builder near you for all your extension buildering work?
FIRST FORMAT BUILDING provides a local, trusted extensio...
Need an Extension Builder in Lancing? East West Refurbishment Limited has been helping local clients (20 mile radius) with their extension builderi...
From £21,992
Member since August 2026
Lancing, BN15
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...
Proper Copper DesignWe are a design lead copper homeware company specializing in contemporary handles, taps, showers and accessories. Our products ...
Relax... you have found a reliable extension builder in Lancing. R & G Construction Brighton Ltd is a friendly and reliable company based in Lancin...
Lancing, BN15
ACF Carpentry Ltd is an established and experienced local extension builder in Lancing. Please contact us for a free, no obligation quote and compe...

A flat roof extension ranges from the cheapest of £21,768 (Graeme Davies Plumbing and Heating based in BN3) to the dearest of £22,296 (Proper Copper Design based in BN3), 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 Lancing by posting a job with HaMuch. We'll send it to extension builders in Lancing.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Lancing | £36 | £249 |
| Build A Flat Roof Extension near Worthing | £35 | £249 |
| Build A Flat Roof Extension near Shoreham-by-Sea | £36 | £250 |
| Build A Flat Roof Extension near Rustington | £35 | £242 |
| Build A Flat Roof Extension near Brighton | £35 | £253 |
| Build A Flat Roof Extension near Brighton and Hove | £35 | £252 |
| Build A Flat Roof Extension near Littlehampton | £35 | £241 |
| Build A Flat Roof Extension near Arun | £35 | £241 |
| Build A Flat Roof Extension near Burgess Hill | £36 | £256 |
| 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 - £17,508

Two storey extension - £88,012

Build a timber frame extension - £26,008

Build a swimming pool - £81,008

Single storey extension - £55,160

Side return extension - £41,590

Install an RSJ - £2,208

Outbuilding - £10,008

Build a Mansard loft conversion - £52,008

Loft conversion - £33,825

Build a kitchen extension - £42,008

Hip to gable loft conversion - £42,008

Granny annexe - £87,008

Garden office - £10,008

Convert a Garage - £16,008

Garage - £18,508

Build a flat roof extension - £22,008

Build a dormer loft conversion - £42,008

Concrete foundations - £6,258

Convert a bungalow loft - £29,008

Convert a basement - £37,590