From £86,884
Caernarfon, LL54
Building & Flat Roofing Contractors is a trusted extension builder serving customers in Caernarfon and the surrounding area. Contact us to today to...
From £87,616
Fiting of door internal/external All joinery work from new joists to fitting off skirting boards Kitchen fitting Staircase or replac...
From £87,580
Need an Extension Builder in Caernarfon? Hughes Construction has been helping local clients (20 mile radius) with their extension buildering jobs f...
From £87,148
WJ Builders is an established and experienced local extension builder in Caernarfon. Please contact us for a free, no obligation quote and competit...
From £87,592
Need to find an Extension Builder near you for all your extension buildering work?
W F CLAYTON & CO LTD provides a local, trusted extension...
From £87,292
Glyndwr Roofing & Building Services are here to help customers who need an Extension Builder in Caernarfon. We offer a competitive rate to complete...
From £87,280
Relax... you have found a reliable extension builder in Caernarfon. Property Maintenance Solutions is a friendly and reliable company based in Caer...

Costs range from £86,884 (Building & Flat Roofing Contractors based in LL54) to £87,616 (Balmoral joinery/construction based in LL60), but these are just estimates. The best way to compare costs is to get real quotes from real builders.
Post your job on HaMuch and we'll send it to extension builders to Caernarfon.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Two Storey Extension near Conwy | £28 | £211 |
| Two Storey Extension near Conway | £28 | £211 |
| Two Storey Extension near Llandudno | £28 | £211 |
| Two Storey Extension near Colwyn Bay | £28 | £211 |
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 - £17,061

Two storey extension - £87,342

Build a timber frame extension - £25,561

Build a swimming pool - £80,561

Single storey extension - £46,223

Side return extension - £36,563

Install an RSJ - £1,761

Outbuilding - £9,561

Build a Mansard loft conversion - £51,561

Loft conversion - £29,636

Build a kitchen extension - £41,561

Hip to gable loft conversion - £41,561

Granny annexe - £86,561

Garden office - £9,561

Convert a Garage - £15,561

Garage - £18,061

Build a flat roof extension - £21,561

Build a dormer loft conversion - £41,561

Concrete foundations - £5,811

Convert a bungalow loft - £28,561

Convert a basement - £32,563