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SH Enterprise
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
"Concrete foundation" - W1T, job posted 16/10/25
Torrington
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
Reid and Co Developments Ltd
Jay Reid
CK Constructions & Development Ltd
CK Constructions & Development Ltd is a trusted extension builder serving customers in New Oxford Street and the surrounding area. Contact us to to...
A to Z Builders Ltd
A to Z Builders Ltd are here to help customers who need an Extension Builder in New Oxford Street. We offer a competitive rate to complete all your...
JK Doors
JK Doors is a trusted extension builder serving customers in New Oxford Street and the surrounding area. Contact us to today to get a competitive q...
JM Building Services
JM Building Services is a trusted extension builder serving customers in New Oxford Street and the surrounding area. Contact us to today to get a c...
Buildwiser
Buildwiser is a trusted extension builder serving customers in New Oxford Street and the surrounding area. Contact us to today to get a competitive...
F & F Building Services
F & F Building Services is an established extension buildering business in New Oxford Street. We come highly recommended and provide competitive qu...
Q Lofts and Extensions
Anthony Sullivan
We build Lofts. We build Extensions. We undertake conversions. Our Terms and conditions apply as shown in our starter packs.
£42/hr
£269/day
plansing
Plansing Ltd
Experience the best architectural design services with PLANSING, where we flawlessly integrate innovative architectural designer products to bring ...
£41/hr
£255/day
TOP CONSTRUCTION
TOP CONSTRUCTION is an established extension buildering business in New Oxford Street. We come highly recommended and provide competitive quotes fo...
£26/hr
£26/day
London Design And Build
London Design And Build
Here at London Design and Build, our team of architects, interior designers, structural engineers and contractors, offer a bespoke, turn-key servic...
£48/hr
£303/day
Masters Construction UK
Joel Cayless white
20 years experience in high end carpentry, joinery and furniture making
£42/hr
£262/day
Gil Construction Ltd
We offer many services in both residential and commercial settings including:BathroomsBuilding & RenovationDecking & PavingDemolitionDoor Installat...
£42/hr
£260/day
Whitehorse Build London
Whitehorse Build London offers a full management service running each project from design through to completion, removing many of the hassle associ...
£41/hr
£258/day
My Lady Builder
My Lady Builder is founded by Marion Watts, award winning property developerwith over 17 years experience in the industry. She hosted the Kensingto...
£43/hr
£268/day
House Rendering Ltd
House Rendering Ltd is a trusted extension builder serving customers in New Oxford Street and the surrounding area. Contact us to today to get a co...
£45/hr
£280/day
HouseUP
Relax... you have found a reliable extension builder in New Oxford Street. HouseUP is a friendly and reliable company based in New Oxford Street wh...
£44/hr
£275/day
My Trusted Builder
Experienced extension builder ready to quote for your work. My Trusted Builder is the best extension builder in New Oxford Street. No obligation fr...
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Use these steps to find Extension Builders in New Oxford Street for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in New Oxford Street. 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 New Oxford Street 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 - £26,232

Garden office - £10,232

Granny annexe - £87,232

Build a flat roof extension - £22,232

Convert a Garage - £16,232

Hip to gable loft conversion - £42,232

Convert a bungalow loft - £29,232

Build a dormer loft conversion - £42,232

Build a swimming pool - £81,232

Build a Mansard loft conversion - £52,232

Concrete foundations - £6,482

Underpin a building - £17,732

Two storey extension - £88,348

Convert a basement - £40,110

Side return extension - £44,110

Loft conversion - £35,925

Garage - £18,732

Single storey extension - £59,640

Outbuilding - £10,232

Install an RSJ - £2,432

Build a kitchen extension - £42,232
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