| extension cost calculator | 1.79 | 0.4 | 8240 | 25 | 12 |
| extension cost calculator uk | 0.17 | 0.5 | 1086 | 28 | 39 |
| extension cost calculator 2023 | 0.48 | 0.8 | 1401 | 30 | 66 |
| extension cost calculator australia | 2 | 0.7 | 4317 | 35 | 40 |
| extension cost calculator uk 2023 | 1.26 | 0.3 | 1064 | 33 | 3 |
| extension cost calculator uk 2022 | 1.21 | 0.9 | 4715 | 33 | 87 |
| house extension cost calculator | 1.32 | 0.4 | 5702 | 31 | 18 |
| lease extension cost calculator | 0.31 | 1 | 2685 | 31 | 45 |
| second storey extension cost calculator | 0.44 | 0.7 | 4121 | 39 | 16 |
| home extension cost calculator | 1.46 | 0.4 | 1205 | 30 | 13 |
| house extension cost calculator australia | 1.38 | 0.7 | 4694 | 41 | 39 |
| two storey extension cost calculator | 0.97 | 1 | 6269 | 36 | 75 |
| building extension cost calculator | 1.53 | 0.2 | 5992 | 34 | 66 |
| single storey extension cost calculator | 1.25 | 0.4 | 6295 | 39 | 73 |
