Development Profit Calculator — City of London
Assess the profitability of your development project by modelling all costs and calculating key return metrics. Understand your profit on cost, profit on GDV, and overall ROI before committing to your City of London scheme.
Project Appraisal Inputs
Profitability Analysis
Total Development Costs
£917,500
Gross Profit
£282,500
Net Profit (after agent & legal fees)
£240,500
Return Metrics
Profit on Cost
26.21%
Meets lender criteria
Profit on GDV
20.04%
Target: 15-20%
ROI
26.21%
Return on investment
Full Cost Summary
Cost vs Profit Breakdown
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Profit Calculator FAQ
How to Calculate Development Profit for City of London Projects
Accurately calculating development profit is the cornerstone of any successful property development project. For developers operating in the City of London, where land values are among the highest in the UK and construction costs are typically elevated due to the unique challenges of building in a dense urban environment, getting your profit calculations right is essential for securing finance and making sound investment decisions.
The starting point for any development profit calculation is the Gross Development Value, or GDV. This represents the total value of the completed development, calculated either as the sum of individual unit sales values for residential schemes or the investment value for commercial properties. In the City of London, GDV figures can vary enormously depending on the specific location, specification, and target market. A residential scheme near Barbican may command very different per-square-foot values compared to a similar scheme near Bank or Monument.
From the GDV, you deduct all development costs to arrive at your profit figure. These costs include the land or property purchase price, stamp duty land tax, construction costs, professional fees, finance costs, contingency, and disposal costs such as estate agent and solicitor fees. Each of these cost elements needs careful estimation to ensure your profit projection is realistic. Our calculator above allows you to input each cost component and adjust the percentage-based items to see how they impact your overall returns.
Two key metrics that lenders and developers focus on are profit on cost and profit on GDV. Profit on cost is calculated by dividing the net profit by the total development costs, while profit on GDV divides the net profit by the gross development value. Most senior development finance lenders require a minimum profit on cost of 20%, which provides a sufficient buffer against cost overruns and market fluctuations. Profit on GDV of 15-20% is also typically expected for residential schemes in the City of London.
Use this calculator to run multiple scenarios for your City of London development project. Try adjusting the contingency percentage to see how unexpected costs would affect profitability, or model different agent fee structures to compare the impact of selling through different channels. Understanding these numbers inside out will strengthen your funding applications and help you negotiate better terms with lenders.