Cheapest builders to build a side return extension in Porthmadog
Range from the cheapest Side return extension £27150 (Building & Flat Roofing Contractors based in LL54) to the dearest Side return extension £30120 (Balmoral joinery/construction based in LL60).
Comparing extension builders estimates for Side return extension 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 for a side return extention by posting your job to extension builders in Porthmadog.
Estimates for common extension builder jobs in Porthmadog;
| Job | Estimate |
| Underpinning a house | £16686 |
| Build a two storey extension | £86779 |
| Build a timber frame extension | £25186 |
| Install a swimming pool | £80186 |
| Cost to build a single storey extension | £33720 |
| Cost to build a side return extension | £28343 |
| Install an RSJ | £1386 |
| Build an outbuilding | £9186 |
| Build a mansard loft conversion | £51186 |
| Cost of a loft conversion | £26119 |
| Build a kitchen extension | £41186 |
| Build a hip to gable loft conversion | £41186 |
| Build a granny annexe | £86186 |
| Build a garden office | £9186 |
| Convert a garage | £15186 |
| Build a new garage | £17686 |
| Build a flat roof extension | £21186 |
| Build a dormer loft conversion | £41186 |
| Lay a concrete foundation | £5436 |
| Convert a bungalow loft | £28186 |
| Basement conversion cost | £28343 |
Rates for other Porthmadog trades
Side return extension cost in Porthmadog
| Business name | Side return extension cost |
|---|---|
| WJ Builders, Pwllheli, LL53 | £27600 |
| W A Mitchell, Caernarfon, LL54 | £28500 |
| Building & Flat Roofing Contractors, Caernarfon, LL54 | £27150 |
| Balmoral joinery/construction , Gaerwen gwynedd , LL60 | £30120 |