From £38,580
Greater London, SE6
Whether you are looking to build, extend or upgrade we will help. From building to decorating. Our professional team have the skills and experie...
From £37,770
Jeremy Weston, trading as GreenGauge has over 10 years experience working as a Heating Engineer. Fully Insured and Gas Safe Registered.Base...
From £39,210
Catford, SE6
Relax... you have found a reliable extension builder in SE6. S G Painting Contractor Ltd is a friendly and reliable company based in SE6 who consid...
From £39,210
We provide our clients with excellent service and quality. Whether you are looking to extend or upgrade, our professional team has the skills and e...
From £40,290
London, SE6
Baseline Build and Renovate Ltd is an established extension buildering business in SE6. We come highly recommended and provide competitive quotes f...
From £41,010
Construction Surety is an established extension buildering business in SE6. We come highly recommended and provide competitive quotes for your work...
From £42,630
MPN Engineering LTD are here to help customers who need an Extension Builder in SE6. We offer a competitive rate to complete all your extension bui...
From £38,310
Trusted and professional extension builder in SE6. Experienced in all extension buildering work and keeping within budget and on quote. Carai Ltd h...
From £41,010
Pure Building & Maintenance is a family run business with over 35 years' experience. Comprising a team of dedicated professionals who all have the...
From £39,750
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 a Convert a basement 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 to convert a basement in SE6 by posting a job with HaMuch and we will send it to extension builders in SE6.
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 - £17,702

Two storey extension - £88,304

Build a timber frame extension - £26,202

Build a swimming pool - £81,202

Single storey extension - £59,048

Side return extension - £43,777

Install an RSJ - £2,402

Outbuilding - £10,202

Build a Mansard loft conversion - £52,202

Loft conversion - £35,648

Build a kitchen extension - £42,202

Hip to gable loft conversion - £42,202

Granny annexe - £87,202

Garden office - £10,202

Convert a Garage - £16,202

Garage - £18,702

Build a flat roof extension - £22,202

Build a dormer loft conversion - £42,202

Concrete foundations - £6,452

Convert a bungalow loft - £29,202

Convert a basement - £39,777