Torrington Design
NIECEIC / NAAPIT GASSAFE WATER REGULATIONS We offer services towards completion of high end construction projects to dis...
"Did callout made safe my elctrical work thanks" - reviewed 16/05/23, REECYRUSSO
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
CK Constructions & Development Ltd is a trusted extension builder serving customers in WC2B and the surrounding area. Contact us to today to get a ...
A to Z Builders Ltd are here to help customers who need an Extension Builder in WC2B. We offer a competitive rate to complete all your extension bu...
JK Doors is a trusted extension builder serving customers in WC2B and the surrounding area. Contact us to today to get a competitive quote for exte...
JM Building Services is a trusted extension builder serving customers in WC2B and the surrounding area. Contact us to today to get a competitive qu...
Buildwiser is a trusted extension builder serving customers in WC2B and the surrounding area. Contact us to today to get a competitive quote for ex...
F & F Building Services is an established extension buildering business in WC2B. We come highly recommended and provide competitive quotes for your...
Anthony Sullivan
We build Lofts. We build Extensions. We undertake conversions. Our Terms and conditions apply as shown in our starter packs.
From £42,152
Plansing Ltd
Experience the best architectural design services with PLANSING, where we flawlessly integrate innovative architectural designer products to bring ...

In WC2B, prices for dormer loft conversions range from £41,976 (A to Z Builders Ltd based in SW1P) to £44,064 (Q Lofts and Extensions based in EC1R), but how much your conversion costs will vary depending on the size of your property, how easy access to your roof is and what you want to use the space for.
The best way to get an accurate price is to compare quotes from extension builders in WC2B. Post your job on HaMuch now and we'll put you in touch with available extension builders.
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 - £17,828

Two storey extension - £88,492

Build a timber frame extension - £26,328

Build a swimming pool - £81,328

Single storey extension - £61,560

Side return extension - £45,190

Install an RSJ - £2,528

Outbuilding - £10,328

Build a Mansard loft conversion - £52,328

Loft conversion - £36,825

Build a kitchen extension - £42,328

Hip to gable loft conversion - £42,328

Granny annexe - £87,328

Garden office - £10,328

Convert a Garage - £16,328

Garage - £18,828

Build a flat roof extension - £22,328

Build a dormer loft conversion - £42,328

Concrete foundations - £6,578

Convert a bungalow loft - £29,328

Convert a basement - £41,190