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Ferguson Building Services Limited is an established and experienced local extension builder in Henfield. Please contact us for a free, no obligati...
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 Henfield? East West Refurbishment Limited has been helping local clients (20 mile radius) with their extension builder...
From £41,992
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...
Proper Copper DesignWe are a design lead copper homeware company specializing in contemporary handles, taps, showers and accessories. Our products ...
Trusted and professional extension builder in Henfield. Experienced in all extension buildering work and keeping within budget and on quote. Good C...
ACF Carpentry Ltd is an established and experienced local extension builder in Henfield. Please contact us for a free, no obligation quote and comp...
Reuben Sargent
Rjscarpentryconstruction is a well established company with over 30 years of experience in the carpentry and construction industries
JBF Building & Roofing Maintenance Ltd is an established and experienced local extension builder in Henfield. Please contact us for a free, no obli...
Relax... you have found a reliable extension builder in Henfield. Aurabuild is a friendly and reliable company based in Henfield who consider no jo...

In Henfield, prices for dormer loft conversions range from £41,936 (ACF Carpentry Ltd based in BN15) to £42,600 (RJ's Carpentry Construction based in RH15), but how much your conversion costs will vary depending on the size of your property, how easy access to your roof is and what you want to use the space for.
The best way to get an accurate price is to compare quotes from extension builders in Henfield. Post your job on HaMuch now and we'll put you in touch with available extension builders.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Dormer Loft Conversion near Burgess Hill | £36 | £256 |
| Build A Dormer Loft Conversion near Shoreham-by-Sea | £36 | £250 |
| Build A Dormer Loft Conversion near Lancing | £36 | £249 |
| Build A Dormer Loft Conversion near Brighton and Hove | £35 | £252 |
| Build A Dormer Loft Conversion near Haywards Heath | £35 | £256 |
| Build A Dormer Loft Conversion near Worthing | £35 | £249 |
| Build A Dormer Loft Conversion near Brighton | £35 | £253 |
| Build A Dormer Loft Conversion near Horsham | £38 | £265 |
| Build A Dormer Loft Conversion near Mid Sussex | £35 | £261 |
| Build A Dormer Loft Conversion near Rustington | £35 | £242 |
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 - £17,650

Two storey extension - £88,226

Build a timber frame extension - £26,150

Build a swimming pool - £81,150

Single storey extension - £58,008

Side return extension - £43,192

Install an RSJ - £2,350

Outbuilding - £10,150

Build a Mansard loft conversion - £52,150

Loft conversion - £35,160

Build a kitchen extension - £42,150

Hip to gable loft conversion - £42,150

Granny annexe - £87,150

Garden office - £10,150

Convert a Garage - £16,150

Garage - £18,650

Build a flat roof extension - £22,150

Build a dormer loft conversion - £42,150

Concrete foundations - £6,400

Convert a bungalow loft - £29,150

Convert a basement - £39,192