Development Value Calculator
Estimate gross development value from completed units and average sale value.
Gross sales value before selling costs, development costs, finance and profit.
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Get the model · €79 incl. VATHow the Development Value calculation works
Gross development value = completed units × average sale value per unit.
Example calculation
80 completed units at an average €350k selling price produce €28.0m of GDV.
How professionals use the result
Use GDV as the top-line value in a sell-out appraisal, then deduct selling costs, development costs, finance and target profit.
Common mistakes
- Ignoring unit mix
- Using asking prices rather than net achieved prices
- Excluding sales costs
- Applying today’s price without timing assumptions
Development Value Calculator FAQs
What does the Development Value calculator measure?
Estimate gross development value from completed units and average sale value.
What formula does the Development Value calculator use?
Gross development value = completed units × average sale value per unit.
Is the result suitable for a final investment decision?
Use it as a transparent screening calculation. Validate deal-specific tax, timing, financing and legal assumptions in a complete underwriting model before making a decision.
Do I need an account?
No. The calculator is free and runs in your browser. FormulaPlanet does not store your projects, inputs or results.
Is any input sent publicly?
No calculation is public by default. A shareable link is only created when you explicitly choose to copy one; that link contains the assumptions shown in its URL.
Why might my spreadsheet give a different answer?
Differences usually come from timing, compounding, sign conventions, fees or a different definition of the numerator or denominator. Match every period and definition before comparing.
What should I review alongside this result?
Use GDV as the top-line value in a sell-out appraisal, then deduct selling costs, development costs, finance and target profit.
Which mistakes are most common?
Ignoring unit mix; Using asking prices rather than net achieved prices; Excluding sales costs; Applying today’s price without timing assumptions.