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Renovation cost with contingency calculator UK

Add contractor, material and professional quotes with a separate chosen contingency. Check the formula, worked example and limits before using your own figures.

Enter your figures

Your estimate

Project cash budget

£18,150.00
Quoted base costs£16,500.00
Contingency amount£1,650.00

Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. Uses your quotes, not regional building-cost benchmarks. The selected contingency is not a guarantee; VAT treatment and permission requirements must be checked separately.

How the renovation cost with contingency calculator uk works

Base = labour + materials + professional costs. Total = base × (1 + contingency).

Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.

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Worked example: renovation cost with contingency

This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.

Quoted labour including applicable VAT (£)
10,000
Quoted materials including VAT (£)
5,000
Professional and permission fees (£)
1,500
Contingency percentage (%)
10

Project cash budget: £18,150.00

Base = labour + materials + professional costs. Total = base × (1 + contingency).

Renovation cost with contingency: questions answered

What does the renovation cost with contingency calculation include?

Base = labour + materials + professional costs. Total = base × (1 + contingency). Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. Uses your quotes, not regional building-cost benchmarks. The selected contingency is not a guarantee; VAT treatment and permission requirements must be checked separately.

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Using your result

Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.

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