| extension costs calculator | 1.13 | 0.5 | 8094 | 26 | 32 |
| extension cost calculator uk | 0.29 | 0.4 | 4523 | 28 | 66 |
| extension cost calculator 2023 | 0.94 | 0.1 | 6527 | 30 | 65 |
| extension cost calculator australia | 1.95 | 0.6 | 9023 | 35 | 93 |
| extension cost calculator uk 2023 | 0.7 | 0.4 | 6759 | 33 | 37 |
| extension cost calculator uk 2022 | 1.68 | 0.2 | 3450 | 33 | 41 |
| house extension cost calculator | 0.49 | 0.4 | 4999 | 31 | 28 |
| lease extension cost calculator | 1.08 | 0.4 | 3862 | 31 | 3 |
| second storey extension cost calculator | 1.14 | 0.1 | 4973 | 39 | 27 |
| extension cost calculator | 0.6 | 0.6 | 1689 | 25 | 28 |
| home extension cost calculator | 1.02 | 0.4 | 1008 | 30 | 74 |
| house extension cost calculator australia | 1.68 | 0.6 | 3604 | 41 | 49 |
| two storey extension cost calculator | 1.33 | 0.8 | 1332 | 36 | 80 |
| building extension cost calculator | 0.7 | 0.2 | 8388 | 34 | 77 |
