Home Renovation Cost Calculator UK
Instantly estimate your home refurbishment budget. Enter your total floor area, average cost per m² and contingency to see your projected spend.
How This Works
This calculator multiplies your total floor area by your chosen cost per square metre, then adds contingency: Cost = area × rate × (1 + contingency / 100). You can overwrite the default 10% contingency to suit your project risk.
For step-by-step planning advice, see our How to Plan a Home Renovation guide.
Choosing Materials & Finishes
Higher-end finishes (hand-made tiles, hardwood flooring) raise your cost per m². Get supplier quotes for accurate figures. Read our Best Renovation Materials 2025.
Finding a Contractor
Always collect three written quotes and check credentials. Use our Local Contractor Directory for vetted professionals in your area.
Budgeting Tips
Reserve an extra 5–10% on top of your contingency for unexpected issues. See our Top Renovation Budgeting Tips.
Key Project Values
| Entity | Attribute | Value |
|---|---|---|
| Renovation | Floor area | m² |
| Renovation | Cost per m² | £ |
| Renovation | Contingency | % |
Frequently Asked Questions
How accurate is this renovation cost estimate?
Costs use UK averages. For precision, replace the default rate with supplier or contractor quotes.
Does this include labour and materials?
Yes—enter a combined rate per m². To separate them, adjust your figures accordingly.
What contingency percentage should I use?
Typically 10–15%. Use higher percentages for older properties or complex projects.
How do I measure my floor area?
Measure length × width of each room, then sum them. See our guide for tips on tricky layouts.
