What this result means
The calculator adds your known budget items and applies a contingency reserve for uncertainty and unexpected work.
How the renovation budget calculator works
Actual costs vary by location and project scope. Get contractor quotations before committing funds.
The calculator does not fetch live prices or rates. That is intentional: you provide the tariff, price, rate or cost that actually applies to your situation, which makes the assumptions visible and avoids presenting stale market data as current.
How to get a more useful estimate
- Base materials and labor on written quotations when possible.
- Keep contingency separate so you can see what is committed versus reserved.
- Use a higher contingency for older buildings, demolition-heavy work, or poorly defined scopes.
Scenario check
Contingency is meant for uncertainty, not for known work that was left out of the estimate. Start with the best available materials, labor and permit figures, then apply a contingency that reflects how well the scope is defined. If major items are still unknown, estimate them explicitly before using contingency so the buffer is not hiding an incomplete budget.
Important limitations
- Financing cost and temporary accommodation are excluded unless you add them to other costs.
- The contingency percentage is not a guarantee that overruns will stay within that amount.
- Price changes and scope changes can make initial estimates obsolete.
Frequently asked questions
What contingency should I use?
There is no universal percentage. Simpler, well-defined projects may need less, while uncertain or older-property work may need more.
Should furniture be included?
Include it if it is part of the project budget you are planning, usually in materials or other costs.
Why separate permits and other costs?
It helps prevent fees, approvals, delivery, design, or disposal charges from disappearing inside a materials estimate.