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Select your affordable NW3 extension builder
Samuele Paolini
Need an Extension Builder in NW3? Samuele Paolini has been helping local clients (5 mile radius) with their extension buildering jobs for many yea...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Patrick Gavin
Need an Extension Builder in NW3? NWL Renovations Ltd has been helping local clients (5 mile radius) with their extension buildering jobs for many...
SLS BUILDERS LIMITED is a trusted extension builder serving customers in NW3 and the surrounding area. Contact us to today to get a competitive quo...
Darren Bergin
Relax... you have found a reliable extension builder in NW3. First guard Roofing is a friendly and reliable company based in NW3 who consider no jo...
Hussein Eljhani
We are highly professional Builders Company, hones pricing and reliable, we leave all areas clean and tidy.
Plum & Bros Loft Ltd is an established extension buildering business in NW3. We come highly recommended and provide competitive quotes for your wor...
Need to find an Extension Builder near you for all your extension buildering work?
EUROBUILD PROPERTIES CO LTD provides a local, trusted ex...
From £36,675
Our building services company AA Plus Renovation Ltd has over 13 years of experience. Since then, we have been helping customers in London and the ...

Comparing extension builders estimates for Loft conversion 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 of a loft conversion in NW3 by posting your job to extension builders in NW3.
"Loft conversion 50 sq meater renovation of houe in nd out. Can call on 0203 336x xx" - NW2, job posted 02/05/24
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 - £17,912

Two storey extension - £88,618

Build a timber frame extension - £26,412

Build a swimming pool - £81,412

Single storey extension - £63,240

Side return extension - £46,135

Install an RSJ - £2,612

Outbuilding - £10,412

Build a Mansard loft conversion - £52,412

Loft conversion - £37,613

Build a kitchen extension - £42,412

Hip to gable loft conversion - £42,412

Granny annexe - £87,412

Garden office - £10,412

Convert a Garage - £16,412

Garage - £18,912

Build a flat roof extension - £22,412

Build a dormer loft conversion - £42,412

Concrete foundations - £6,662

Convert a bungalow loft - £29,412

Convert a basement - £42,135