WHIPP CONSTRUCTION LTD is an established extension buildering business in Harlesden. We come highly recommended and provide competitive quotes for ...
C & A Contractors is a trusted extension builder serving customers in Harlesden and the surrounding area. Contact us to today to get a competitive ...
Krystian Wojasiewicz
Krystian Wojasiewicz is a trusted extension builder serving customers in Harlesden and the surrounding area. Contact us to today to get a competiti...
Samuele Paolini
Need an Extension Builder in Harlesden? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for ma...
Patrick Kelly
Over 20 years experience
Client focussed and driven
Personal planning and completion of work
Warranty ...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Relax... you have found a reliable extension builder in Harlesden. M & A UK Ltd is a friendly and reliable company based in Harlesden who consider ...
Trusted and professional extension builder in Harlesden. Experienced in all extension buildering work and keeping within budget and on quote. WHITE...
Jonathan Rimmer
Experienced extension builder ready to quote for your work. Mr is the best extension builder in Harlesden. No obligation free quotes and many happy...
Harlesden London, NW10
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...

Outbuilding costs in Harlesden range from the cheapest of £9,928 (BPS Building based in NW6) to the dearest of £11,616 (GasHeat based in NW10), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in Harlesden by posting a job with HaMuch and we will send it to extension builders.
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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 - £17,862

Two storey extension - £88,542

Build a timber frame extension - £26,362

Build a swimming pool - £81,362

Single storey extension - £62,232

Side return extension - £45,568

Install an RSJ - £2,562

Outbuilding - £10,362

Build a Mansard loft conversion - £52,362

Loft conversion - £37,140

Build a kitchen extension - £42,362

Hip to gable loft conversion - £42,362

Granny annexe - £87,362

Garden office - £10,362

Convert a Garage - £16,362

Garage - £18,862

Build a flat roof extension - £22,362

Build a dormer loft conversion - £42,362

Concrete foundations - £6,612

Convert a bungalow loft - £29,362

Convert a basement - £41,568