Range from the cheapest £18 per hour and £120 per day (Penarth Loft Conversions Ltd based in CF64) to the dearest £45 per hour and £200 per day (Hormuz Ltd based in CF10).
Comparing hourly and daily rates of Extension Builder's 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 - Click 'Get quotes' and describe your job and we will send it to your local extension builders for FREE.
yesterday
Hello, I want to get a single storey extension built at the rear of my property. Planning permission has been granted and I have technical drawings ready. Can you arrange a call out to price up the job? Isa Murrell isamurrell@yahoo.co.uk 195 Corporation Road, Cardiff, CF11 7AS
17/09/2024
Refurb existing slate roof including 1x valley, increase insulation and ventilation, repaint soffits and fascia’s, check pointing of remaining chimney, remove other rear, chimney, convert loft area of Victorian end of terrace to additional 2x bedroom and bathroom, add stairs for access, add approx 5-6 roof lights.
17/09/2024
Remove current conservatory and build a small extension 4x4m
We need Extension Builders like you to help local homeowners with their jobs.
See table for all Extension Builder rates in Grangetown
| Job details | Estimate |
| Underpinning a house | £1345 |
| Build a two storey extension | £4483 |
| Build a timber frame extension | £4483 |
| Install a swimming pool | £2690 |
| Cost to build a single storey extension | £35866 |
| Cost to build a side return extension | £41246 |
| Install an RSJ | £785 |
| Build an outbuilding | £1793 |
| Build a mansard loft conversion | £8967 |
| Cost of a loft conversion | £25106 |
| Build a kitchen extension | £8967 |
| Build a hip to gable loft conversion | £6725 |
| Build a granny annexe | £4483 |
| Build a garden office | £1793 |
| Convert a garage | £897 |
| Build a new garage | £1793 |
| Build a flat roof extension | £1524 |
| Build a dormer loft conversion | £1793 |
| Lay a concrete foundation | £1793 |
| Convert a bungalow loft | £2690 |
| Basement conversion cost | £25106 |