Pedro
Need an Extension Builder in DA8? Danni Building Services Ltd has been helping local clients (10 mile radius) with their extension buildering jobs ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Erith, DA8
SV Roofing & Renovations are here to help customers who need an Extension Builder in DA8. We offer a competitive rate to complete all your extensio...
From £36,675
Need to find an Extension Builder near you for all your extension buildering work?
Liam Kinsella Ltd provides a local, trusted extension bu...
From £34,575
Need an Extension Builder in DA8? NEW BUILD MAINTENANCE LTD has been helping local clients (10 mile radius) with their extension buildering jobs fo...
From £33,600
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £33,825
OAK BUILDERS is a trusted extension builder serving customers in DA8 and the surrounding area. Contact us to today to get a competitive quote for e...
From £33,900
Roger Matharoo
We are family run buisness with great pedigree of enginners.
We have over 40 years knowledge in construction building and are very compe...
From £32,475
Experienced extension builder ready to quote for your work. AJP BUILDING SERVICES is the best extension builder in DA8. No obligation free quotes a...
From £33,150
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Comparing extension builders estimates for Loft conversion gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for the cost of a loft conversion in DA8 by posting your job to extension builders in DA8.
"Loft conversion" - ERITH, job posted 08/09/25
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 - £17,559

Two storey extension - £88,089

Build a timber frame extension - £26,059

Build a swimming pool - £81,059

Single storey extension - £56,184

Side return extension - £42,166

Install an RSJ - £2,259

Outbuilding - £10,059

Build a Mansard loft conversion - £52,059

Loft conversion - £34,305

Build a kitchen extension - £42,059

Hip to gable loft conversion - £42,059

Granny annexe - £87,059

Garden office - £10,059

Convert a Garage - £16,059

Garage - £18,559

Build a flat roof extension - £22,059

Build a dormer loft conversion - £42,059

Concrete foundations - £6,309

Convert a bungalow loft - £29,059

Convert a basement - £38,166