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Ferguson Building Services Limited is an established and experienced local extension builder in Steyning. Please contact us for a free, no obligati...
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 Steyning. Experienced in all extension buildering work and keeping within budget and on quote. Stretc...
Need to find an Extension Builder near you for all your extension buildering work?
FIRST FORMAT BUILDING provides a local, trusted extensio...
From £51,992
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 Steyning. 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 Steyning. Please contact us for a free, no obligation quote and comp...
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 Steyning. Experienced in all extension buildering work and keeping within budget and on quote. BRICKT...

Mansard loft conversions range from the cheapest installation of £51,880 (Stretch My Home Ltd based in BN12) to the dearest of around £52,296 (Proper Copper Design based in BN3).
While these estimates give you a good idea how much you'll pay for a mansard loft conversion, the only way to get an accurate price is to get real quotes from real builders.
Get quotes to install a mansard loft conversion in Steyning by posting a job with HaMuch and we'll send it to extension builders in Steyning.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Mansard Loft Conversion near Lancing | £36 | £249 |
| Build A Mansard Loft Conversion near Shoreham-by-Sea | £36 | £250 |
| Build A Mansard Loft Conversion near Worthing | £35 | £249 |
| Build A Mansard Loft Conversion near Rustington | £35 | £242 |
| Build A Mansard Loft Conversion near Brighton | £35 | £253 |
| Build A Mansard Loft Conversion near Brighton and Hove | £35 | £252 |
| Build A Mansard Loft Conversion near Burgess Hill | £36 | £256 |
| Build A Mansard Loft Conversion near Littlehampton | £35 | £241 |
| Build A Mansard Loft Conversion near Horsham | £38 | £265 |
| Build A Mansard Loft Conversion near Arun | £35 | £241 |
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 - £17,551

Two storey extension - £88,077

Build a timber frame extension - £26,051

Build a swimming pool - £81,051

Single storey extension - £56,024

Side return extension - £42,076

Install an RSJ - £2,251

Outbuilding - £10,051

Build a Mansard loft conversion - £52,051

Loft conversion - £34,230

Build a kitchen extension - £42,051

Hip to gable loft conversion - £42,051

Granny annexe - £87,051

Garden office - £10,051

Convert a Garage - £16,051

Garage - £18,551

Build a flat roof extension - £22,051

Build a dormer loft conversion - £42,051

Concrete foundations - £6,301

Convert a bungalow loft - £29,051

Convert a basement - £38,076