Reliable and experienced extension builders with competitive rates and good at keeping within budget. Happy to provide examples of extension builde...
Robert Wilson
Wood floor services is a trusted extension builder serving customers in LL18 and the surrounding area. Contact us to today to get a competitive qu...
From £21,416
John Foster
Octagon Construction Ltd is a trusted extension builder serving customers in LL18 and the surrounding area. Contact us to today to get a competitiv...
From £21,456
S ROBERTS ROOFING are here to help customers who need an Extension Builder in LL18. We offer a competitive rate to complete all your extension buil...

A flat roof extension ranges from the cheapest of £21,416 (Octagon Construction Ltd based in LL18) to the dearest of £21,872 (Brothers Construction based in LL18), 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 LL18 by posting a job with HaMuch. We'll send it to extension builders in LL18.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Flat Roof Extension near Rhyl | £28 | £209 |
| Build A Flat Roof Extension near Prestatyn | £29 | £213 |
| Build A Flat Roof Extension near Colwyn Bay | £28 | £211 |
| Build A Flat Roof Extension near Llandudno | £28 | £211 |
| Build A Flat Roof Extension near Conway | £28 | £211 |
| Build A Flat Roof Extension near Conwy | £28 | £211 |
| Build A Flat Roof Extension near Heswall | £30 | £213 |
| Build A Flat Roof Extension near Flintshire | £33 | £224 |
| Build A Flat Roof Extension near Wirral | £31 | £219 |
| Build A Flat Roof Extension near Connah's Quay | £33 | £229 |
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 - £17,144

Two storey extension - £87,466

Build a timber frame extension - £25,644

Build a swimming pool - £80,644

Single storey extension - £47,880

Side return extension - £37,495

Install an RSJ - £1,844

Outbuilding - £9,644

Build a Mansard loft conversion - £51,644

Loft conversion - £30,413

Build a kitchen extension - £41,644

Hip to gable loft conversion - £41,644

Granny annexe - £86,644

Garden office - £9,644

Convert a Garage - £15,644

Garage - £18,144

Build a flat roof extension - £21,644

Build a dormer loft conversion - £41,644

Concrete foundations - £5,894

Convert a bungalow loft - £28,644

Convert a basement - £33,495