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DW Building is a trusted extension builder serving customers in Botany Bay and the surrounding area. Contact us to today to get a competitive quote...
Need an Extension Builder in Botany Bay? Colin Lynch Builders has been helping local clients (10 mile radius) with their extension buildering jobs ...
Wittick Building Ltd is a trusted extension builder serving customers in Botany Bay and the surrounding area. Contact us to today to get a competit...
Need an Extension Builder in Botany Bay? Roni Lofts Conversions Ltd has been helping local clients (10 mile radius) with their extension buildering...
Homeowners look no further if you want a qualified extension builder to work in your home. The00Company Ltd are tidy and neat, providing a quality ...
Relax... you have found a reliable extension builder in Botany Bay. Home Projects is a friendly and reliable company based in Botany Bay who consid...
R & I Builders is an established extension buildering business in Botany Bay. We come highly recommended and provide competitive quotes for your wo...
HOW WE WORK?We are here to design the best places!Our experience includes projects all over the world, from small scaled projects to large resident...
AGK Building Services Ltd is a small family-run business with more than 20 years' experience in the building services industry. We have a team of d...

In Botany Bay, prices for dormer loft conversions range from £41,872 (Colin Lynch Builders based in EN3) to £42,432 (MM-Builders based in N9), 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 Botany Bay. 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 - £17,699

Two storey extension - £88,299

Build a timber frame extension - £26,199

Build a swimming pool - £81,199

Single storey extension - £58,984

Side return extension - £43,741

Install an RSJ - £2,399

Outbuilding - £10,199

Build a Mansard loft conversion - £52,199

Loft conversion - £35,618

Build a kitchen extension - £42,199

Hip to gable loft conversion - £42,199

Granny annexe - £87,199

Garden office - £10,199

Convert a Garage - £16,199

Garage - £18,699

Build a flat roof extension - £22,199

Build a dormer loft conversion - £42,199

Concrete foundations - £6,449

Convert a bungalow loft - £29,199

Convert a basement - £39,741