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Brendan Healy
All building work , all hoyse maintenance. House extension and refurbishment works.
Christian Builders Margate Ltd is a multi-service company founded by Nick Christian. We operate with a highly skilled team of designers, tradesmen,...
GDB CONSTRUCTION is a trusted extension builder serving customers in Sandwich and the surrounding area. Contact us to today to get a competitive qu...
Festim Kastrati
We been for almost 15 years in the building trade,
we are easy going and willing to work with our client and to archive the best r...
Need to find an Extension Builder near you for all your extension buildering work?
Bespoke building projects provides a local, trusted exte...
From £22,032
Jordan Pink
Monarch Builders South East Ltd is an established and experienced local extension builder in Sandwich. Please contact us for a free, no obligation ...
From £21,536
4D BUILDERS LTD are here to help customers who need an Extension Builder in Sandwich. We offer a competitive rate to complete all yo...
From £21,504
Christian Builders Margate Ltd is an established and experienced local extension builder in Sandwich. Please contact us for a free, no obligation q...
From £21,600
Relax... you have found a reliable extension builder in Sandwich. Paragon Stone Design is a friendly and reliable company based in Sandwich who con...
From £21,632
Design – our highly experienced design team can help you visualise your dream outcomes, working sympathetically with your space to find the perfe...

A flat roof extension ranges from the cheapest of £21,312 (B H G M Ltd based in CT7) to the dearest of £22,032 (Monarch Builders South East Ltd based in CT9), 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 Sandwich by posting a job with HaMuch. We'll send it to extension builders in Sandwich.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Deal | £26 | £199 |
| Build A Flat Roof Extension near Margate | £27 | £208 |
| Build A Flat Roof Extension near Ramsgate | £27 | £208 |
| Build A Flat Roof Extension near Thanet | £27 | £207 |
| Build A Flat Roof Extension near Broadstairs | £27 | £208 |
| Build A Flat Roof Extension near Dover | £29 | £226 |
| Build A Flat Roof Extension near Canterbury | £31 | £232 |
| Build A Flat Roof Extension near Herne Bay | £28 | £213 |
| Build A Flat Roof Extension near Whitstable | £28 | £214 |
| Build A Flat Roof Extension near Folkestone | £31 | £233 |
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 - £17,126

Two storey extension - £87,438

Build a timber frame extension - £25,626

Build a swimming pool - £80,626

Single storey extension - £47,512

Side return extension - £37,288

Install an RSJ - £1,826

Outbuilding - £9,626

Build a Mansard loft conversion - £51,626

Loft conversion - £30,240

Build a kitchen extension - £41,626

Hip to gable loft conversion - £41,626

Granny annexe - £86,626

Garden office - £9,626

Convert a Garage - £15,626

Garage - £18,126

Build a flat roof extension - £21,626

Build a dormer loft conversion - £41,626

Concrete foundations - £5,876

Convert a bungalow loft - £28,626

Convert a basement - £33,288