Dartford, DA1
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,008
Dartford, DA1
OAK BUILDERS is a trusted extension builder serving customers in DA1 and the surrounding area. Contact us to today to get a competitive quote for e...
From £10,216
Need to find an Extension Builder near you for all your extension buildering work?
A Tutton Building Services Limited provides a local, tru...
From £10,328
Dartford, DA1
AJW BUILDERS is a trusted extension builder serving customers in DA1 and the surrounding area. Contact us to today to get a competitive quote for e...
From £10,320
ABAH Property Services Ltd is a trusted extension builder serving customers in DA1 and the surrounding area. Contact us to today to get a competiti...
From £10,040
Dartford, DA1
Ideal Loft Ladders South East (SE) Ltd is an established extension buildering business in DA1. We come highly recommended and provide competitive q...
From £10,120
ForsBuild Construction Ltd is a trusted extension builder serving customers in DA1 and the surrounding area. Contact us to today to get a competiti...

Outbuilding costs in DA1 range from the cheapest of £10,008 (OAK BUILDERS based in DA1) to the dearest of £10,392 (Amberly Builders based in DA1), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in DA1 by posting a job with HaMuch and we will send it to extension builders.
| Borough in London |
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| Outbuilding in Dartford |
| Outbuilding in Darenth |
| Outbuilding in Crayford |
| Outbuilding in Bexley |
| Outbuilding in Barnehurst |
| Outbuilding in Purfleet |
| Outbuilding in Bexleyheath |
| Outbuilding in Stone |
| Outbuilding in Swanley |
| Outbuilding in Belvedere |
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 - £58,980

Side return extension - £43,739

Install an RSJ - £2,399

Outbuilding - £10,199

Build a Mansard loft conversion - £52,199

Loft conversion - £35,616

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 - £39,739