How HaMuch saves you money
Post your job for free
We send your job to ALL IG1 extension builders
Compare quotes
Available extension builders in IG1 reply
Save Money
Select your affordable IG1 extension builder
Post your job
From £21,880
Can design and Construction
Erald Kanani
Member since August 2025
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Render
Experienced extension builder ready to quote for your work. Render is the best extension builder in IG1. No obligation free quotes and many happy c...
Decorating Building Service
Decorating Building Service are here to help customers who need an Extension Builder in IG1. We offer a competitive rate to complete all your exten...
From £22,176
Fedora and sons Ltd
MIHAI Martolea
Member since September 2026
Fedora and sons Ltd is a trusted extension builder serving customers in IG1 and the surrounding area. Contact us to today to get a competitive quot...
M & S Builders
Ilford, IG1
M & S Builders is a trusted extension builder serving customers in IG1 and the surrounding area. Contact us to today to get a competitive quote for...
B J CULLEN BUILDERS
B J CULLEN BUILDERS are here to help customers who need an Extension Builder in IG1. We offer a competitive rate to complete all your extension bui...
Major Building Contractors Ltd
Relax... you have found a reliable extension builder in IG1. Major Building Contractors Ltd is a friendly and reliable company based in IG1 who con...
Sz Builders
Need to find an Extension Builder near you for all your extension buildering work?
Sz Builders provides a local, trusted extension builderi...
Jhon
Ilford, IG1
Experienced extension builder ready to quote for your work. Jhon is the best extension builder in IG1. No obligation free quotes and many happy cus...
CREATIVE BUILDING SOLUTIONS
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Flat roof extension cost in IG1
A flat roof extension ranges from the cheapest of £21,880 (Can design and Construction based in Ig11) to the dearest of £22,712 (Render based in IG1), but these are just estimates. While they give you an idea of who will be better value, the best way to compare costs is to get real quotes.
Find out how much your flat roof extension will cost in IG1 by posting a job with HaMuch. We'll send it to extension builders in IG1.
- How much does a flat roof extension cost?
- Flat roof extension cost per m2
- Factors affecting the cost of flat roof extensions
- Advantages and disadvantages of flat roofs
- Which is cheaper: a flat roof or pitched roof?
- How long does a flat roof extension take?
- Do you need planning permission for a flat roof extension?
- How long does a flat roof last?
- Can you walk on a flat roof extension?
- What insulation do I need for a flat roof extension?
Get extension builder rates instantly
Estimates for common extension builder jobs in IG1;
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 - £17,626
Two storey extension - £88,190
Build a timber frame extension - £26,126
Build a swimming pool - £81,126
Single storey extension - £57,528
Side return extension - £42,922
Install an RSJ - £2,326
Outbuilding - £10,126
Build a Mansard loft conversion - £52,126
Loft conversion - £34,935
Build a kitchen extension - £42,126
Hip to gable loft conversion - £42,126
Granny annexe - £87,126
Garden office - £10,126
Convert a Garage - £16,126
Garage - £18,626
Build a flat roof extension - £22,126
Build a dormer loft conversion - £42,126
Concrete foundations - £6,376
Convert a bungalow loft - £29,126
Convert a basement - £38,922