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Nathan Thomas
Nathan Thomas Plumbing is an established extension buildering business in Knowsley. We come highly recommended and provide competitive quotes for y...
Peter Gallagher
Experienced extension builder ready to quote for your work. P & P Building Services is the best extension builder in Knowsley. No obligation free q...
J.M.C Building Services is a trusted extension builder serving customers in Knowsley and the surrounding area. Contact us to today to get a competi...
Relax... you have found a reliable extension builder in Knowsley. KM Building Services is a friendly and reliable company based in Knowsley who con...
G. Finnigan Builders is an established extension buildering business in Knowsley. We come highly recommended and provide competitive quotes for you...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need an Extension Builder in Knowsley? Bob the Builder has been helping local clients (20 mile radius) with their extension buildering jobs for man...
Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Need an Extension Builder in Knowsley? KMC Brickwork has been helping local clients (20 mile radius) with their extension buildering jobs for many ...
Mark Robinson
Trusted and professional extension builder in Knowsley. Experienced in all extension buildering work and keeping within budget and on quote. M L R ...

A flat roof extension ranges from the cheapest of £21,608 (M L R Building Services based in WA11) to the dearest of £21,976 (Nathan Thomas Plumbing based in L19), 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 Knowsley by posting a job with HaMuch. We'll send it to extension builders in Knowsley.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Knowsley | £31 | £222 |
| Build A Flat Roof Extension near Prescot | £31 | £223 |
| Build A Flat Roof Extension near Huyton with Roby | £31 | £225 |
| Build A Flat Roof Extension near Kirkby | £31 | £224 |
| Build A Flat Roof Extension near St Helens | £31 | £224 |
| Build A Flat Roof Extension near Widnes | £31 | £220 |
| Build A Flat Roof Extension near Halton | £31 | £220 |
| Build A Flat Roof Extension near Bootle | £33 | £228 |
| Build A Flat Roof Extension near Liverpool | £31 | £222 |
| Build A Flat Roof Extension near Maghull | £34 | £231 |
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 - £17,293

Two storey extension - £87,689

Build a timber frame extension - £25,793

Build a swimming pool - £80,793

Single storey extension - £50,856

Side return extension - £39,169

Install an RSJ - £1,993

Outbuilding - £9,793

Build a Mansard loft conversion - £51,793

Loft conversion - £31,808

Build a kitchen extension - £41,793

Hip to gable loft conversion - £41,793

Granny annexe - £86,793

Garden office - £9,793

Convert a Garage - £15,793

Garage - £18,293

Build a flat roof extension - £21,793

Build a dormer loft conversion - £41,793

Concrete foundations - £6,043

Convert a bungalow loft - £28,793

Convert a basement - £35,169