From £10,208
Need to find an Extension Builder near you for all your extension buildering work?
Albion Roofing Solutions provides a local, trusted exten...
From £9,984
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
From £10,072
Trusted and professional extension builder in SE26. Experienced in all extension buildering work and keeping within budget and on quote. NKD Contra...
From £10,312
Pure Building & Maintenance is a family run business with over 35 years' experience. Comprising a team of dedicated professionals who all have the...
From £9,904
Need to find an Extension Builder near you for all your extension buildering work?
STOYANOV CONSTRUCTION LTD provides a local, trusted exte...
From £10,248
Baseline Build and Renovate Ltd is an established extension buildering business in SE26. We come highly recommended and provide competitive quotes ...
From £9,952
Our building services company Ruspi Ltd has many years of experience.We have been helping customers in London and the surrounding area by p...
From £10,040
Need to find an Extension Builder near you for all your extension buildering work?
Smartroofingbuildingcontractorsltd provides a local, tru...
From £10,424
Experienced extension builder ready to quote for your work. Claudiu Mihaila is the best extension builder in SE26. No obligation free quotes and ma...
From £10,432
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...

Outbuilding costs in SE26 range from the cheapest of £9,904 (STOYANOV CONSTRUCTION LTD based in SE23) to the dearest of £10,432 (Universal Plastering Ltd based in SE19), but these are just estimates.
Comparing extension builders estimates for building an outbuilding gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build an outbuilding in SE26 by posting a job with HaMuch and we will send it to extension builders.
| Borough in London |
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| Outbuilding in Sydenham |
| Outbuilding in Forest Hill |
| Outbuilding in Penge |
| Outbuilding in Crystal Palace |
| Outbuilding in Dulwich |
| Outbuilding in Catford |
| Outbuilding in Beckenham |
| Outbuilding in East Dulwich |
| Outbuilding in Tulse Hill |
| Outbuilding in South Norwood |
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 - £17,658

Two storey extension - £88,236

Build a timber frame extension - £26,158

Build a swimming pool - £81,158

Single storey extension - £58,152

Side return extension - £43,273

Install an RSJ - £2,358

Outbuilding - £10,158

Build a Mansard loft conversion - £52,158

Loft conversion - £35,228

Build a kitchen extension - £42,158

Hip to gable loft conversion - £42,158

Granny annexe - £87,158

Garden office - £10,158

Convert a Garage - £16,158

Garage - £18,658

Build a flat roof extension - £22,158

Build a dormer loft conversion - £42,158

Concrete foundations - £6,408

Convert a bungalow loft - £29,158

Convert a basement - £39,273