Property Development Calculator
Use Numan's development calculator to get a quick estimate of project costs and potential value for residential development or refurbishment schemes.
Whether you are a seasoned developer or planning your first project, this tool provides an indicative appraisal based on your inputs and current market assumptions.
Enter the postcode, purchase price, existing and proposed square footage, project type and finish quality to see a high-level cost and value breakdown.
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Results
Fill the form so you can see your results
This calculation is only a guide. We can't give financial advice, so always check with an adviser.
Development Calculator for 2026
How the Calculation Works?
The calculator estimates:
Total project costs (including acquisition and development inputs)
Projected value once works are complete
An indication of overall feasibility
Estimates are based on local market value per square foot and the information you enter. This provides an early-stage assessment to support initial decision-making.
Who This Calculator Is Suitable For?
Property investors assessing potential deals
Developers reviewing small projects
Homeowners planning extensions or renovations
It helps evaluate potential value before committing to detailed design or funding.
Important Information
This calculator provides an illustrative estimate only.
Results are based solely on the information entered and general market assumptions.
The figures generated do not constitute a formal valuation, financial appraisal, or investment advice.
Estimated costs, finance assumptions, and resale values may vary significantly depending on build specifications, planning outcomes, market conditions, funding terms, and timing of sale.
Actual development costs may exceed initial projections.
Property development involves financial risk. Independent professional advice should be obtained before entering into any binding agreements or commencing works.
Frequently Asked Questions
Find answers to common questions about development calculator.
