Range from the cheapest Basement conversion £27150 (Building & Flat Roofing Contractors based in LL54) to the dearest Basement conversion £30120 (Balmoral joinery/construction based in LL60).
Comparing extension builders estimates for a Basement conversion 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 the cost to convert a basement in Porthmadog by posting a job with HaMuch and we will send it to extension builders 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 |
Business name | Basement conversion 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 |