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Mandala Building Services
Hertfordshire, WD6
Mandala Building Services is a family-owned design and build maintenance company, encompassing everything from residential refurbishment to large-s...
BBC
Relax... you have found a reliable extension builder in WD6. BBC is a friendly and reliable company based in WD6 who consider no job as too big or ...
London Roofing Building Ltd
Borehamwood, WD6
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Lukpol Building Services
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
V and T Homes Limited
Greater London, WD6
V and T Homes Limited is an established extension buildering business in WD6. We come highly recommended and provide competitive quotes for your wo...
From £53,080
LF Gjabri Contractions Ltd
Astrit Gjabri
Very good builder Brick work block work ground fencin drive ways patios extension New building no job to small
From £55,320
Monarchy Building Services Ltd
Hertfordshire, WD6
Our building services company Monarchy Building Services Ltd have seventeen years’ experience and have been helping customers in Borehamwood and ...
From £52,280
Ardent Home Improvements Ltd
Ardent Home Improvements Ltd is a trusted extension builder serving customers in WD6 and the surrounding area. Contact us to today to get a competi...
From £60,120
Harris Calnan Construction
Herefordshire, WD6
Harris Calnan Construction is an established and experienced local extension builder in WD6. Please contact us for a free, no obligation quote and ...
From £63,000
K&K Building Contractors Ltd
Trusted and professional extension builder in WD6. Experienced in all extension buildering work and keeping within budget and on quote. K&K Buildin...
Extension builder estimates (based on hourly rates) to build a single storey extension in WD6
"Single storey extension" - BOREHAMWOOD, job posted 07/05/25
- How much does a single storey extension cost?
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Estimates for common extension builder jobs in WD6;
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 - £17,622
Two storey extension - £88,184
Build a timber frame extension - £26,122
Build a swimming pool - £81,122
Single storey extension - £57,448
Side return extension - £42,877
Install an RSJ - £2,322
Outbuilding - £10,122
Build a Mansard loft conversion - £52,122
Loft conversion - £34,898
Build a kitchen extension - £42,122
Hip to gable loft conversion - £42,122
Granny annexe - £87,122
Garden office - £10,122
Convert a Garage - £16,122
Garage - £18,622
Build a flat roof extension - £22,122
Build a dormer loft conversion - £42,122
Concrete foundations - £6,372
Convert a bungalow loft - £29,122
Convert a basement - £38,877