Range from the cheapest single storey extension £37,400 (Smudge Construction Ltd based in TR13) to the dearest single storey extension £47,000 (Peninsula Property Refurbishments based in TR15).
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 Penzance by posting a job with HaMuch and we will send it to extension builders in Penzance.

| Business name | Single storey extension cost |
|---|---|
| TGP Construction, Cornwall, TR18 | £40,920 |
| Searle Construction , Penzance, TR19 | £40,600 |
| Marks maintenance, Cornwall, TR14 | £43,640 |
| D.P.Hatley Building Services, Camborne, TR14 | £43,640 |
| Smudge Construction Ltd, Helston , TR13 | £37,400 |
| D & S Builders, Redruth, TR15 | £43,800 |
| Peninsula Property Refurbishments, REDRUTH, TR15 | £47,000 |
| Samuel Winn Design & Build, Cornwall, TR3 | £44,440 |
| KPK Builders Ltd, Lanner, TR16 | £42,680 |
| Jo Tracey Carpentry, Cornwall, TR3 | £44,760 |
| Jackson Developments, Cornwall, TR10 | £44,760 |
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Single Storey Extension near St Ives, Cornwall | £22 | £137 |
| Single Storey Extension near Camborne | £24 | £168 |
| Single Storey Extension near Falmouth | £27 | £183 |
| Single Storey Extension near Truro | £27 | £182 |
| Single Storey Extension near Newquay | £27 | £193 |