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NA Brickwork
Experienced extension builder ready to quote for your work. NA Brickwork is the best extension builder in DA5. No obligation free quotes and many h...
"Outbuilding" - SIDCUP, job posted 12/11/25
R Tredget & Son
R Tredget & Son are here to help customers who need an Extension Builder in DA5. We offer a competitive rate to complete all your extension builder...
"House clearing - same property you have serviced before" - DA5, job posted 11/10/25
GW Building Solutions
Gary Woolcombe
I am an experienced builder, I jave been in the building game since I left college after doing a 2 year bricklaying apprenticeship.
I ha...
"Granny annexe" - BEXLEYHEATH, job posted 07/10/25
PCO BUILDING SERVICES
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
"Single storey extension" - DA15, job posted 20/05/25
£41/hr
£257/day
Sunny Build Ltd
Sunny Build Ltd is an established and experienced local extension builder in DA5. Please contact us for a free, no obligation quote and competitive...
£41/hr
£254/day
T L CONSTRUCTION
Trusted and professional extension builder in DA5. Experienced in all extension buildering work and keeping within budget and on quote. T L CONSTRU...
£69/hr
£252/day
Roger Matharoo
Roger Matharoo
We are family run buisness with great pedigree of enginners.
We have over 40 years knowledge in construction building and are very compe...
£46/hr
£282/day
FireX Contracts Limited
FireX Contracts Limited is a trusted extension builder serving customers in DA5 and the surrounding area. Contact us to today to get a competitive ...
£37/hr
£233/day
AJP BUILDING SERVICES
Experienced extension builder ready to quote for your work. AJP BUILDING SERVICES is the best extension builder in DA5. No obligation free quotes a...
£35/hr
£267/day
Henderson - Ure Building & Construction
Neil Henderson
Building company specialising in mordenising, extending and re modelling your home.
With a 100% record for fulfilling jobs to the highes...
£39/hr
£242/day
J S Crudden Building & Construction
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£38/hr
£236/day
Montrose Builders Ltd
Need an Extension Builder in DA5? Montrose Builders Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for ma...
£38/hr
£238/day
Henty Construction
Henty Construction are here to help customers who need an Extension Builder in DA5. We offer a competitive rate to complete all your extension buil...
£43/hr
£265/day
Toro Renovations Ltd
Kent, DA5
Founded in Primrose Hill in 2016 by Michael Clarkson, Toro Renovations Ltd was made to provide our clients with exceptional standards in property r...
£43/hr
£268/day
TWF Building Works
Our building services company TWF Building Works have over 38 years? experience in the trade. We have been helping customers all over London and th...
£33/hr
£240/day
D D Loft Conversions
Danny Dalton
Bexley, DA5
D D Loft Conversions is a trusted extension builder serving customers in DA5 and the surrounding area. Contact us to today to get a competitive quo...
£48/hr
£294/day
C2 Building & Consultancy Limited
Experienced extension builder ready to quote for your work. C2 Building & Consultancy Limited is the best extension builder in DA5. No obligation f...
£23/hr
£192/day
Inner City Refurbs Ltd
Need an Extension Builder in DA5? Inner City Refurbs Ltd has been helping local clients (10 mile radius) with their extension buildering jobs for m...
£47/hr
£300/day
Leadway Developments & Construction Ltd
Leadway Developments & Construction Ltd specialise in Extensions and Conversions in and around Sidcup, Bexley and the surrounding...
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Use these steps to find Extension Builders in DA5 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in DA5. We’ll notify you via text or email when an Extension Builder is available to quote.
- Select your Extension Builder: Compare Extension Builders interested in working with you. You can use HaMuch to safely message local DA5 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 - £26,080

Garden office - £10,080

Granny annexe - £87,080

Build a flat roof extension - £22,080

Convert a Garage - £16,080

Hip to gable loft conversion - £42,080

Convert a bungalow loft - £29,080

Build a dormer loft conversion - £42,080

Build a swimming pool - £81,080

Build a Mansard loft conversion - £52,080

Concrete foundations - £6,330

Underpin a building - £17,580

Two storey extension - £88,120

Convert a basement - £38,400

Side return extension - £42,400

Loft conversion - £34,500

Garage - £18,580

Single storey extension - £56,600

Outbuilding - £10,080

Install an RSJ - £2,280

Build a kitchen extension - £42,080
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