Range from the cheapest single storey extension £36,920 (Mount Oriel Conversions & Extensions based in BT8) to the dearest single storey extension £40,600 (Ballygrange Contracts based in BT34).
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 Newcastle by posting a job with HaMuch and we will send it to extension builders in Newcastle.

| Business name | Single storey extension cost |
|---|---|
| Ballygrange Contracts, Down, BT34 | £40,600 |
| N W Doyle & Son, Ballynahinch, BT24 | £39,000 |
| JDL Contracts, Newry, BT34 | £39,000 |
| apex pharaoh ltd, Down, bt30 | £37,720 |
| Mount Oriel Conversions & Extensions, Belfast, BT8 | £36,920 |
| Colin Gilmore Building Contractor, Newtownards, BT22 | £39,000 |
| Location in UK | Hourly Rate | Daily Rate |
|---|---|---|
| Single Storey Extension near Kilkeel | £24 | £155 |
| Single Storey Extension near Ballynahinch | £15 | £150 |
| Single Storey Extension near Saintfield | £20 | £141 |
| Single Storey Extension near Portaferry | £20 | £150 |
| Single Storey Extension near Hillsborough and Culcavy | £21 | £141 |
| Single Storey Extension near Lisburn | £20 | £139 |
| Single Storey Extension near Carryduff | £19 | £130 |
| Single Storey Extension near Waringstown | £21 | £146 |
| Single Storey Extension near Maghaberry | £27 | £175 |
| Single Storey Extension near Comber | £20 | £142 |