Range from the cheapest single storey extension £36,600 (Building & Flat Roofing Contractors based in LL54) to the dearest single storey extension £41,720 (Hughes Construction based in LL57).
Comparing extension builders estimates for fitting a downstairs toilet gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to build a single storey extension in Penrhyndeudraeth by posting a job with HaMuch and we will send it to extension builders in Penrhyndeudraeth.

| Business name | Single storey extension cost |
|---|---|
| Building & Flat Roofing Contractors, Caernarfon, LL54 | £36,600 |
| WJ Builders, Pwllheli, LL53 | £37,400 |
| Hughes Construction, Bangor, LL57 | £41,720 |
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Single Storey Extension near Conwy | £26 | £206 |
| Single Storey Extension near Conway | £24 | £184 |
| Single Storey Extension near Llandudno | £24 | £184 |
| Single Storey Extension near Colwyn Bay | £26 | £206 |
| Single Storey Extension near Rhyl | £24 | £178 |
| Single Storey Extension near Prestatyn | £24 | £179 |