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Andy Harris
Andy Harris Construction is an established and experienced local extension builder in Acton. Please contact us for a free, no obligation quote and ...
Vas Constructs
RUBBERCOVER™ EPDM Permaroof rubber cover and roof system. Lead flashing. NCTS. Timber Frame Buildings. Refurbish fit out, structural ...
Experienced extension builder ready to quote for your work. Khetani Builders (UK) Ltd is the best extension builder in Acton. No obligation free qu...
Patrick Kelly
Over 20 years experience
Client focussed and driven
Personal planning and completion of work
Warranty ...
Relax... you have found a reliable extension builder in Acton. M & A UK Ltd is a friendly and reliable company based in Acton who consider no job a...
AG-Renovation Ltd is a trusted extension builder serving customers in Acton and the surrounding area. Contact us to today to get a competitive quot...
Jonathan Rimmer
Experienced extension builder ready to quote for your work. Mr is the best extension builder in Acton. No obligation free quotes and many happy cus...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Newpark Construction are here to help customers who need an Extension Builder in Acton. We offer a competitive rate to complete all your extension ...
Acton London, W3
At Ferdas Design & Build Ltd we have been fitting bespoke bathrooms since 2013. We pride ourselves on being the go-to bathroom fitters for discerni...

Building a granny annexe ranges from £87,096 (Mr based in NW10) to £88,840 (1st & 2nd Fix Vasconstruct based in W12), 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 Acton by posting a job with HaMuch. We will send it to extension builders in Acton 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 - £18,076

Two storey extension - £88,864

Build a timber frame extension - £26,576

Build a swimming pool - £81,576

Single storey extension - £66,520

Side return extension - £47,980

Install an RSJ - £2,776

Outbuilding - £10,576

Build a Mansard loft conversion - £52,576

Loft conversion - £39,150

Build a kitchen extension - £42,576

Hip to gable loft conversion - £42,576

Granny annexe - £87,576

Garden office - £10,576

Convert a Garage - £16,576

Garage - £19,076

Build a flat roof extension - £22,576

Build a dormer loft conversion - £42,576

Concrete foundations - £6,826

Convert a bungalow loft - £29,576

Convert a basement - £43,980