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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...
Russell Square, WC1N
CK Constructions & Development Ltd is a trusted extension builder serving customers in WC1N 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 WC1N. We offer a competitive rate to complete all your extension bu...
JK Doors is a trusted extension builder serving customers in WC1N 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 WC1N and the surrounding area. Contact us to today to get a competitive qu...
Buildwiser is a trusted extension builder serving customers in WC1N and the surrounding area. Contact us to today to get a competitive quote for ex...
Anthony Sullivan
We build Lofts. We build Extensions. We undertake conversions. Our Terms and conditions apply as shown in our starter packs.
From £16,152
Plansing Ltd
Experience the best architectural design services with PLANSING, where we flawlessly integrate innovative architectural designer products to bring ...
From £16,040
TOP CONSTRUCTION is an established extension buildering business in WC1N. We come highly recommended and provide competitive quotes for your work.<...

Garage conversions in WC1N typically range from £15,976 (A to Z Builders Ltd based in SW1P) to £18,064 (Q Lofts and Extensions based in EC1R), but the only way to get an accurate cost for your specific project is to get quotes.
Post a job with HaMuch and we'll send it to extension builders in WC1N who will be happy to help.
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 - £17,806

Two storey extension - £88,460

Build a timber frame extension - £26,306

Build a swimming pool - £81,306

Single storey extension - £61,128

Side return extension - £44,947

Install an RSJ - £2,506

Outbuilding - £10,306

Build a Mansard loft conversion - £52,306

Loft conversion - £36,623

Build a kitchen extension - £42,306

Hip to gable loft conversion - £42,306

Granny annexe - £87,306

Garden office - £10,306

Convert a Garage - £16,306

Garage - £18,806

Build a flat roof extension - £22,306

Build a dormer loft conversion - £42,306

Concrete foundations - £6,556

Convert a bungalow loft - £29,306

Convert a basement - £40,947