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Frame Brickwork
Relax... you have found a reliable extension builder in WD17. Frame Brickwork is a friendly and reliable company based in WD17 who consider no job ...
"Loft conversion" - WD19, job posted 07/05/26
1st Choice Builders UK
Experienced extension builder ready to quote for your work. 1st Choice Builders UK is the best extension builder in WD17. No obligation free quotes...
"Looking for a loft conversion with a flat shed dormer (1 bed and bathroom) i have plans which have been submitted so looking for quotes" - WD24, job posted 26/12/25
T N Roofing
T N Roofing is an established extension buildering business in WD17. We come highly recommended and provide competitive quotes for your work.
"Loft conversion" - WD24, job posted 07/12/25
A&T Building
Andy
A&T Building is an established extension buildering business in WD17. We come highly recommended and provide competitive quotes for your work.
..."Side return extension" - WD18, job posted 09/10/25
Conversion Property and Electrical Services
Our building services company Conversion Property and Electrical Services has 17 years of experience in the industry. We have been helping customer...
"I am looking for quotes for a small rear extension on a terraced property in WD18, Watford. The extension will be built directly behind the existing kitchen and will house a toilet, stand-up shower, and a small hand basin. Existing Details: Existing Kitchen Width (internal): 2.01 metres ..." - WD18, job posted 07/08/25
Design & Build Builders Ltd
Trusted and professional extension builder in WD17. Experienced in all extension buildering work and keeping within budget and on quote. Design & B...
"I am looking for quotes for a small rear extension on a terraced property in WD18, Watford. The extension will be built directly behind the existing kitchen and will house a toilet, stand-up shower, and a small hand basin. Existing Details: Property Type: Mid-terrace house Location: WD18,..." - WATFORD, job posted 07/08/25
Tonybuild
Watford, WD17
Relax... you have found a reliable extension builder in WD17. Tonybuild is a friendly and reliable company based in WD17 who consider no job as too...
"Single storey extension" - WATFORD, job posted 26/05/25
Eeoc
Emilian Czeiszperger
Hello I am Emilian , the proud owner of Eeoc Ltd, A little about me With many happy and returning customers over the last 14 years, y...
"Hip to gable loft conversion" - WD24, job posted 28/01/25
£43/hr
£268/day
Primrose Projects
Hertfordshire, WD17
Primrose Projects is an established and experienced local extension builder in WD17. Please contact us for a free, no obligation quote and competit...
"Loft conversion" - WD17, job posted 27/12/24
£52/hr
£306/day
DSB Premier Construction Limited
Homeowners look no further if you want a qualified extension builder to work in your home. DSB Premier Construction Limited are tidy and neat, prov...
"Two storey extension" - WATFORD, job posted 16/12/24
£38/hr
£239/day
Progressive Design London
Experienced extension builder ready to quote for your work. Progressive Design London is the best extension builder in WD17. No obligation free quo...
"Side return extension" - WD17, job posted 05/03/24
£45/hr
£285/day
Architectural Brickwork Services
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...
£37/hr
£235/day
Crown Building
Relax... you have found a reliable extension builder in WD17. Crown Building is a friendly and reliable company based in WD17 who consider no job a...
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- Post your job: Click "Get quotes" and briefly describe your job.
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- Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local WD17 Extension Builders or phone them directly - you’re in control!
Local Extension Builders in London Boroughs
Job estimates from extension builders near 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.
Build a timber frame extension - £26,440
Garden office - £10,440
Granny annexe - £87,440
Build a flat roof extension - £22,440
Convert a Garage - £16,440
Hip to gable loft conversion - £42,440
Convert a bungalow loft - £29,440
Build a dormer loft conversion - £42,440
Build a swimming pool - £81,440
Build a Mansard loft conversion - £52,440
Concrete foundations - £6,690
Underpin a building - £17,940
Two storey extension - £88,660
Convert a basement - £42,450
Side return extension - £46,450
Loft conversion - £37,875
Garage - £18,940
Single storey extension - £63,800
Outbuilding - £10,440
Install an RSJ - £2,640
Build a kitchen extension - £42,440
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