Understanding the Capital Stack
Learn how senior debt, mezzanine finance, and equity combine to fund a development project. Understanding the capital stack is essential for maximising returns.
What Is the Capital Stack?
The capital stack is the complete structure of capital used to fund a property development. It represents all sources of funding arranged by their priority in the event of a default — those with the highest priority get repaid first.
Understanding the capital stack is essential for property developers because it determines your cost of capital, the amount of equity you need to contribute, and your potential return on investment. By structuring the capital stack effectively, you can maximise leverage while managing risk.
A typical capital stack for a development project consists of three main layers: senior debt (development finance), mezzanine debt, and equity. Each layer carries different risk characteristics, costs, and terms.
Senior Debt — Development Finance
Senior debt sits at the bottom of the capital stack and has the highest priority for repayment. This is your primary development finance facility, secured by a first legal charge over the property.
Key characteristics:
• First charge security — highest priority in repayment
• Typically 55-70% of total costs (Loan-to-Cost)
• Usually capped at 60-65% of GDV (Loan-to-Gross Development Value)
• Interest rates from 0.65% per month
• Lowest cost of capital in the stack
• Staged drawdowns against QS certification
Because senior debt has first priority on the security, it carries the lowest risk for the lender and therefore commands the lowest interest rate. However, it will only fund a portion of total costs, leaving a gap that must be filled by the developer's equity or additional layers of finance.
Mezzanine Finance — Filling the Gap
Mezzanine finance sits between senior debt and equity in the capital stack. It is secured by a second legal charge, ranking behind the senior lender but ahead of equity.
Key characteristics:
• Second charge security — repaid after senior debt
• Typically brings combined LTC up to 80-90%
• Interest rates from 1.0-1.8% per month (higher than senior debt)
• Usually provided by specialist mezzanine lenders
• Requires intercreditor agreement with senior lender
• May include profit share or equity participation
Mezzanine finance allows developers to reduce their equity contribution significantly. For example, if senior debt covers 65% of costs and mezzanine covers a further 20%, the developer only needs to contribute 15% equity rather than 35%.
The trade-off is cost — mezzanine finance is more expensive than senior debt because the lender takes on more risk. However, the blended cost of senior plus mezzanine may still deliver attractive returns if the project has strong margins.
Developer Equity
Equity sits at the top of the capital stack and represents the developer's own capital contribution. It has the lowest priority for repayment but captures the residual profit from the development.
Key characteristics:
• Last to be repaid — bears the highest risk
• No fixed cost (return depends on project performance)
• Typically 10-35% of total costs
• Can come from cash, existing property, or equity partners
• Developer retains control over the project
The amount of equity required depends on the debt structure. With senior debt only, you may need 30-35% equity. With senior plus mezzanine, this can be reduced to 10-15%. With development equity partners, it is possible to develop with minimal personal equity contribution.
Equity Sources:
• Personal savings and cash reserves
• Equity release from existing properties
• Family or private investors
• Development equity firms (institutional equity)
• Joint venture partnerships
For Ealing developers, the strong market fundamentals — Elizabeth Line connectivity, regeneration activity, and sustained demand — make equity investment attractive because the risk of capital loss is mitigated by robust market conditions.
Structuring the Optimal Capital Stack
The ideal capital stack balances three competing objectives: minimising the cost of capital, maximising leverage, and maintaining acceptable risk.
Example Capital Stack for an Ealing Development:
Consider a development with total costs of £2 million and a GDV of £3.2 million:
• Senior Debt (65% LTC): £1,300,000 at 0.75% pm
• Mezzanine (20% LTC): £400,000 at 1.25% pm
• Developer Equity (15%): £300,000
Total finance cost: approximately £135,000 (on an 18-month project) Projected profit: approximately £1,065,000 Return on equity: 355%
Compare this with a senior-only structure:
• Senior Debt (65% LTC): £1,300,000 at 0.75% pm
• Developer Equity (35%): £700,000
Total finance cost: approximately £87,750 Projected profit: approximately £1,112,250 Return on equity: 159%
While the senior-only structure generates slightly higher absolute profit (due to lower finance costs), the leveraged structure delivers a dramatically higher return on the developer's equity — 355% vs 159%. This is the power of effective capital stack structuring.
Contact us on 020 3870 1270 to discuss how we can structure the optimal capital stack for your Ealing development project.
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