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Select your affordable Oxford Street extension builder
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Torrington Design
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
SLS BUILDERS LIMITED is a trusted extension builder serving customers in Oxford Street and the surrounding area. Contact us to today to get a compe...
Relax... you have found a reliable extension builder in Oxford Street. M & A UK Ltd is a friendly and reliable company based in Oxford Street who c...
Darren Bergin
Relax... you have found a reliable extension builder in Oxford Street. First guard Roofing is a friendly and reliable company based in Oxford Stree...
Experienced extension builder ready to quote for your work. D & G Building & Decorating is the best extension builder in Oxford Street. No obligati...
CK Constructions & Development Ltd is a trusted extension builder serving customers in Oxford Street and the surrounding area. Contact us to today ...
A to Z Builders Ltd are here to help customers who need an Extension Builder in Oxford Street. We offer a competitive rate to complete all your ext...
Experienced extension builder ready to quote for your work. Cornerstones Construction is the best extension builder in Oxford Street. No obligation...

Building a granny annexe ranges from £86,928 (BPS Building based in NW6) to £87,376 (CK Constructions & Development Ltd based in WC1N), but these are just estimates that can help give you an idea of who will be better value in your area.
The best thing to do is to get quotes to build a granny annexe in Oxford Street by posting a job with HaMuch. We will send it to extension builders in Oxford Street who will be happy to help you.
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 - £17,658

Two storey extension - £88,238

Build a timber frame extension - £26,158

Build a swimming pool - £81,158

Single storey extension - £58,168

Side return extension - £43,282

Install an RSJ - £2,358

Outbuilding - £10,158

Build a Mansard loft conversion - £52,158

Loft conversion - £35,235

Build a kitchen extension - £42,158

Hip to gable loft conversion - £42,158

Granny annexe - £87,158

Garden office - £10,158

Convert a Garage - £16,158

Garage - £18,658

Build a flat roof extension - £22,158

Build a dormer loft conversion - £42,158

Concrete foundations - £6,408

Convert a bungalow loft - £29,158

Convert a basement - £39,282