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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
SH Enterprise
Need the extension buildering job done quickly without breaking the bank? SH Enterprise offer fast, reliable, and affordable extension buildering s...
"Underpin a building" - N7, job posted 23/08/26
CK Constructions & Development Ltd
CK Constructions & Development Ltd is a trusted extension builder serving customers in Finsbury and the surrounding area. Contact us to today to ge...
"Concrete foundation" - W1T, job posted 16/10/25
JK Doors
JK Doors is a trusted extension builder serving customers in Finsbury and the surrounding area. Contact us to today to get a competitive quote for ...
GS Fabric Ltd
GS Fabric Ltd is an established and experienced local extension builder in Finsbury. Please contact us for a free, no obligation quote and competit...
JM Building Services
JM Building Services is a trusted extension builder serving customers in Finsbury and the surrounding area. Contact us to today to get a competitiv...
Buildwiser
Buildwiser is a trusted extension builder serving customers in Finsbury and the surrounding area. Contact us to today to get a competitive quote fo...
Brooks Builders & Decorators
Brooks Builders & Decorators is an established extension buildering business in Finsbury. We come highly recommended and provide competitive quotes...
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 Finsbury. We come highly recommended and provide competitive quotes for your wo...
£40/hr
£250/day
Bok Services Ltd
Need an Extension Builder in Finsbury? Bok Services Ltd has been helping local clients (5 mile radius) with their extension buildering jobs for man...
£40/hr
£252/day
CAPITAL CONSTRUCTION LIMITED
Trusted and professional extension builder in Finsbury. Experienced in all extension buildering work and keeping within budget and on quote. CAPITA...
£48/hr
£303/day
Masters Construction UK
Joel Cayless white
20 years experience in high end carpentry, joinery and furniture making
£44/hr
£275/day
Andrew Penny Construction
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
£46/hr
£284/day
Kovacs Construction Ltd
At Kovacs Construction, you can rely on our talented builders and engineers to deliver unrivalled building services solutions. Let us show you our ...
£38/hr
£240/day
Kovacs Construction Ltd
Experienced extension builder ready to quote for your work. Kovacs Construction Ltd is the best extension builder in Finsbury. No obligation free q...
£46/hr
£284/day
Oxford West
Experienced extension builder ready to quote for your work. Oxford West is the best extension builder in Finsbury. No obligation free quotes and ma...
£48/hr
£299/day
Londoner Building Ltd.
We have the experience and knowledge to carry out any project, big or small. Our team of experts thoroughly plan the budget and manage your projec...
Quickly find an Extension Builder in Finsbury
Use these steps to find Extension Builders in Finsbury for FREE!
- Post your job: Click "Get quotes" and briefly describe your job.
- Enter your details: We’ll match you with Extension Builders in Finsbury. 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 Finsbury 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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