Range from the cheapest single storey extension £42,200 (SEER CONSTRUCTION LTD based in LD3) to the dearest single storey extension £47,000 (K M Lewis T/A Summergill Developments based in LD8).
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 Builth Wells by posting a job with HaMuch and we will send it to extension builders in Builth Wells.

| Business name | Single storey extension cost |
|---|---|
| Cherry Build Limited, Llandrindod Wells, LD1 | £44,280 |
| ST Building, Presteigne , LD8 | £43,800 |
| K M Lewis T/A Summergill Developments, Presteigne, LD8 | £47,000 |
| DEREK REES BUILDING MAINTENANC, Brecon, LD3 | £43,800 |
| SEER CONSTRUCTION LTD, Brecon, LD3 | £42,200 |
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Single Storey Extension near Ebbw Vale | £24 | £195 |
| Single Storey Extension near Tredegar | £24 | £195 |
| Single Storey Extension near Merthyr Tydfil | £28 | £187 |
| Single Storey Extension near Aberdare | £28 | £186 |
| Single Storey Extension near Pontypool | £26 | £183 |