Steps
- Enter the areasFill in “Ground floor area”, “Upper floors (excluding ground)”, and the areas of the rooftop stair room, open roof terrace and front/back yard.
- Enter unit pricesFill in “Structure unit price” and “Finishing or turnkey unit price” from your quotes. If the second price already includes the structure, tick the matching box.
- Adjust factors if neededOpen “Adjust factors to match the contractor's quote” to change how areas are counted. By default: foundation 50%, each floor 100%, roof terrace and roof 50%.
- Read the resultThe “Rough estimate” box updates as you type: converted area, cost of each item and the total.
Tips
- Ask two or three contractors for realistic unit prices.
- If there's a pile cost, enter it in “Pile cost” to see the full total.
- The tool doesn't save your figures: take a screenshot if you want to keep them.
Good to know
- The factors are reference conventions, not government norms.
- Excludes design, permits, loose furniture and ground-condition extras.
- The tool has no built-in prices; every number is entered by you.