From £25,432
WJ Builders is an established and experienced local extension builder in Gwynedd. Please contact us for a free, no obligation quote and competitive...
From £25,256
Building & Flat Roofing Contractors is a trusted extension builder serving customers in Gwynedd and the surrounding area. Contact us to today to ge...

A timber frame extension built in Gwynedd typically ranges from £25,256 (Building & Flat Roofing Contractors based in LL54) to £25,432 (WJ Builders based in LL53), but this will vary depending on the size of your extension, the design features you'd like and what your soil is like for the foundations.
Comparing extension builders estimates for building a timber frame extension gives you an idea of who will be better value, but the best way to compare costs is to get actual quotes.
Get rates and quotes to build a timber frame extension in Gwynedd by posting a job with HaMuch and we'll send it to extension builders in Gwynedd.
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Build A Timber Frame Extension near Conwy | £28 | £211 |
| Build A Timber Frame Extension near Conway | £28 | £211 |
| Build A Timber Frame Extension near Llandudno | £28 | £211 |
| Build A Timber Frame Extension near Colwyn Bay | £28 | £211 |
| Build A Timber Frame Extension near Rhyl | £28 | £209 |
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 - £16,844

Two storey extension - £87,016

Build a timber frame extension - £25,344

Build a swimming pool - £80,344

Single storey extension - £41,880

Side return extension - £34,120

Install an RSJ - £1,544

Outbuilding - £9,344

Build a Mansard loft conversion - £51,344

Loft conversion - £27,600

Build a kitchen extension - £41,344

Hip to gable loft conversion - £41,344

Granny annexe - £86,344

Garden office - £9,344

Convert a Garage - £15,344

Garage - £17,844

Build a flat roof extension - £21,344

Build a dormer loft conversion - £41,344

Concrete foundations - £5,594

Convert a bungalow loft - £28,344

Convert a basement - £30,120