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In an unstable market house extensions are often the most viable option, helping you to get the most out of the space you have without the addition...
Sharp Building Ltd is an established and experienced local extension builder in Northwood. Please contact us for a free, no obligation quote and co...
Relax... you have found a reliable extension builder in Northwood. Building Service and Support Ltd is a friendly and reliable company based in Nor...
Relax... you have found a reliable extension builder in Northwood. C S C BUILDINGS LTD is a friendly and reliable company based in Northwood who co...
Relax... you have found a reliable extension builder in Northwood. Frame Brickwork is a friendly and reliable company based in Northwood who consid...
Personable and individual interior design service designed around what you love.
We specialise in constructing and the refurbishment of homes for discerning clients looking for quality, excellence and design in London and the Ho...
DeHavilland Design and Build have more than 12 years of experience working on major refurbishments, extensions and renovations in Central & West Lo...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Northwood Greater London, HA6
Need to find an Extension Builder near you for all your extension buildering work?
Adams Build and Design LTD. provides a local, trusted ex...

Comparing extension builders estimates for Side return extension 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 a side return extention by posting your job to extension builders in Northwood.
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 - £17,774

Two storey extension - £88,412

Build a timber frame extension - £26,274

Build a swimming pool - £81,274

Single storey extension - £60,488

Side return extension - £44,587

Install an RSJ - £2,474

Outbuilding - £10,274

Build a Mansard loft conversion - £52,274

Loft conversion - £36,323

Build a kitchen extension - £42,274

Hip to gable loft conversion - £42,274

Granny annexe - £87,274

Garden office - £10,274

Convert a Garage - £16,274

Garage - £18,774

Build a flat roof extension - £22,274

Build a dormer loft conversion - £42,274

Concrete foundations - £6,524

Convert a bungalow loft - £29,274

Convert a basement - £40,587