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RCB Group Design & Build
Vasi J
No Call out charges!
All Jobs Fully Insured and Guaranteed !!!
All aspects of Plumbing, Heating and Drains....
..."I am very pleased with the work carried out. All very clear and transparent." - ROMFORD,reviewed 10/01/18, KELLY
Glenn Miller Builders Limited
Glenn Miller
Relax... you have found a reliable extension builder in SE26. Glenn Miller Builders Limited is a friendly and reliable company based in SE26 who co...
"Build a dormer loft conversion" - BR3, job posted 19/09/26
Skim King
Experienced extension builder ready to quote for your work. Skim King is the best extension builder in SE26. No obligation free quotes and many hap...
"Kitchen extension" - BECKENHAM, job posted 25/08/25
£44/hr
£281/day
Baseline Build and Renovate Ltd
Baseline Build and Renovate Ltd is an established extension buildering business in SE26. We come highly recommended and provide competitive quotes ...
"Loft conversion" - BR3, job posted 19/11/24
£41/hr
£253/day
GreenGauge Heating Limited
Jeremy Weston, trading as GreenGauge has over 10 years experience working as a Heating Engineer. Fully Insured and Gas Safe Registered.Base...
"Side return extension" - SE26, job posted 04/08/24
£49/hr
£304/day
Universal Plastering Ltd
We are a family run local business that was founded in 2007. Universal Plastering Ltd provides a wide variety of building and plastering services i...
"Reconstructed full House" - DULWICH, job posted 16/05/24
£37/hr
£235/day
FRIERN BUILDING LTD
FRIERN BUILDING LTD is an established extension buildering business in SE26. We come highly recommended and provide competitive quotes for your wor...
"Basement conversion" - BECKENHAM, job posted 19/02/24
£45/hr
£284/day
BERNARD CONSTRUCTION LTD
BERNARD CONSTRUCTION LTD are here to help customers who need an Extension Builder in SE26. We offer a competitive rate to complete all your extensi...
£47/hr
£298/day
RM Building (London) Ltd
Trusted and professional extension builder in SE26. Experienced in all extension buildering work and keeping within budget and on quote. RM Buildin...
£23/hr
£228/day
Livo builders
Niku Vocaj
Livo builders is a trusted extension builder serving customers in SE26 and the surrounding area. Contact us to today to get a competitive quote fo...
£41/hr
£260/day
CHRIS BALL & SON ROOFING LTD
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£40/hr
£248/day
By design - interior styling and remodelling
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£41/hr
£259/day
NKD Contractors
Trusted and professional extension builder in SE26. Experienced in all extension buildering work and keeping within budget and on quote. NKD Contra...
£46/hr
£289/day
Pure Building & Maintenance Services Limited
Pure Building & Maintenance is a family run business with over 35 years' experience. Comprising a team of dedicated professionals who all have the...
£38/hr
£238/day
STOYANOV CONSTRUCTION LTD
Need to find an Extension Builder near you for all your extension buildering work?
STOYANOV CONSTRUCTION LTD provides a local, trusted exte...
£39/hr
£244/day
Ruspi Ltd
Our building services company Ruspi Ltd has many years of experience.We have been helping customers in London and the surrounding area by p...
£40/hr
£255/day
Smartroofingbuildingcontractorsltd
Need to find an Extension Builder near you for all your extension buildering work?
Smartroofingbuildingcontractorsltd provides a local, tru...
£48/hr
£302/day
CROMARTY CONSTRUCTION
CROMARTY CONSTRUCTION is a trusted extension builder serving customers in SE26 and the surrounding area. Contact us to today to get a competitive q...
£51/hr
£284/day
Cromarty Construction Limited
If you are looking for a SE26 extension builder and you need something replaced, fitted, or fixed, contact Cromarty Construction Limited today. We ...
£42/hr
£261/day
Mesoni Ltd
Mesoni Ltd is a trusted extension builder serving customers in SE26 and the surrounding area. Contact us to today to get a competitive quote for ex...
Quickly find an Extension Builder in SE26
Use these steps to find Extension Builders in SE26 for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in SE26. 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 SE26 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 - £26,152

Garden office - £10,152

Granny annexe - £87,152

Build a flat roof extension - £22,152

Convert a Garage - £16,152

Hip to gable loft conversion - £42,152

Convert a bungalow loft - £29,152

Build a dormer loft conversion - £42,152

Build a swimming pool - £81,152

Build a Mansard loft conversion - £52,152

Concrete foundations - £6,402

Underpin a building - £17,652

Two storey extension - £88,228

Convert a basement - £39,210

Side return extension - £43,210

Loft conversion - £35,175

Garage - £18,652

Single storey extension - £58,040

Outbuilding - £10,152

Install an RSJ - £2,352

Build a kitchen extension - £42,152
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