1. Divide the scope
Separate by zone
Kitchen, bathroom, painting and systems may have different owners and schedules. Zones show where spending is concentrated.
Construction
Renovation budget calculator
Organize line items, reserve money for unexpected costs and check whether your budget is enough.
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How to prepare a useful budget
The total matters, but so do the assumptions behind it.
2. Avoid double-counting
Clarify taxes
Check whether each quote is a final price or before taxes before choosing the overall treatment.
3. Reserve a contingency
Protect the budget
Contingency is not money already spent: it is a reserve for changes, hidden repairs or differences in scope.
Often-forgotten expenses
Before finalizing the figure, check whether you included surface preparation, demolition, debris removal, freight, permits, final cleaning and supervision. Not all apply to every project, but omitting a relevant item can quickly consume the contingency.
Cost per square metre helps compare versions of the same scope. It should not be used alone to compare projects with different quality or systems or different site conditions.
Frequently asked questions
What should a renovation budget include?
Include materials, labor, permits, demolition, debris removal, freight, cleaning and a contingency reserve. The templates are editable starting points.
How much contingency should you add?
It depends on scope and uncertainty. This tool starts at 15%, but you can edit it. Hidden conditions or unclear scope may require more.
Should prices include taxes?
Enter final costs that include taxes or add a percentage to the subtotal. Choose one method to avoid double-counting.
Does the calculator use current prices?
No. You provide all amounts because prices vary by location, supplier, quality, availability and site conditions.
How is cost per square meter calculated?
The estimated total, including contingency and configured taxes, is divided by the entered area. It is useful for comparing scenarios, not as a universal renovation price.
Can materials, labor and permits be separated?
Yes. Each line item has an independent cost type and zone. Results show subtotals by type and zone.
Where is the budget saved?
It is saved automatically in this browser's local storage and is not sent to a server. Clearing browser data may delete it.