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From 2007 – 2015 David Rudelhoff (Founder and Director) was the Property Manager for a high profile, high net worth family. During that time, in ...
EGPM LTD are here to help customers who need an Extension Builder in TW20. We offer a competitive rate to complete all your extension buildering jo...
From £42,464
Egham, TW20
Kandy Build and Construction Ltd is an established extension buildering business in TW20. We come highly recommended and provide competitive quotes...
From £42,216
Need an Extension Builder in TW20? Keay Roofing Services Ltd has been helping local clients (10 mile radius) with their extension buildering jobs f...

In TW20, prices for dormer loft conversions range from £42,160 (EGPM LTD based in TW20) to £42,464 (Kandy Build and Construction Ltd based in TW20), 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 TW20. Post your job on HaMuch now and we'll put you in touch with available extension builders.
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 - £17,788

Two storey extension - £88,432

Build a timber frame extension - £26,288

Build a swimming pool - £81,288

Single storey extension - £60,760

Side return extension - £44,740

Install an RSJ - £2,488

Outbuilding - £10,288

Build a Mansard loft conversion - £52,288

Loft conversion - £36,450

Build a kitchen extension - £42,288

Hip to gable loft conversion - £42,288

Granny annexe - £87,288

Garden office - £10,288

Convert a Garage - £16,288

Garage - £18,788

Build a flat roof extension - £22,288

Build a dormer loft conversion - £42,288

Concrete foundations - £6,538

Convert a bungalow loft - £29,288

Convert a basement - £40,740