Mezzanine finance for property development

Who can borrow and what lenders look for

Mezzanine lenders and equity providers underwrite the scheme and the developer harder than a senior lender, because they sit behind the senior debt and carry more risk. They want an experienced developer with a track record of delivering comparable schemes, a strong development margin with enough headroom to carry the higher cost of the junior layer and still leave a return, a viable scheme with planning consent and a credible build contract, and a clear exit, whether a refinance onto investment finance or a sale. They look closely at the combined leverage, because stretching toward 80 to 90 percent of cost leaves a thin equity cushion, so the scheme has to be robust to cost overruns and a slower lease-up. The disadvantages of mezzanine finance, as the British Business Bank sets out, are its higher cost than senior debt and the longer lead-in times to arrange it, and there is a real risk of default if the scheme underperforms, because the junior layer is repaid only after the senior debt. For a build-to-rent scheme, the income case underpins the margin: Knight Frank put prime regional multifamily net initial yields at around 4.50 percent in September 2025, and a keener yield lifts the gross development value and the margin the layer is repaid from. We test that the margin can carry the cost before we arrange the layer, because mezzanine that erodes the whole return is no help to anyone.

How much you can borrow

Mezzanine finance is sized to fill the gap between the senior debt and the developer's equity. On a build-to-rent scheme, senior development finance funds up to around 60 to 65 percent of cost, and rather than commit the remaining 35 to 40 percent as equity, the developer can use mezzanine and equity to stretch combined leverage toward 80 to 90 percent of cost, reducing the cash it puts in to perhaps 10 to 20 percent. The mezzanine amount is therefore the difference between the senior debt and the total leverage the scheme can support, constrained by the development margin and the senior lender's willingness to sit ahead of a junior layer. The achievable leverage depends on the strength of the scheme: a development with a healthy margin and a clear exit can carry more mezzanine than a marginal one, because the cushion below the junior layer is thicker. The gross development value drives the margin, and for a BTR scheme that value is set by the stabilised rent roll capitalised at an investment yield, which Knight Frank put at around 4.50 percent for Tier 1 regional cities in September 2025. We model the senior debt, the mezzanine, the equity and the combined leverage from the appraisal, so you can see exactly how much cash the structure frees up and what it costs against keeping the scheme more lightly geared.

Rates and costs

Mezzanine finance carries a higher coupon than senior debt, indicatively low-to-mid teens, because it sits behind the senior facility and carries more risk: if the scheme underperforms, the senior lender is repaid first and the mezzanine second, so the junior lender prices for that subordination. That makes mezzanine dearer than senior debt but cheaper than equity, which takes a share of the profit rather than a coupon, and the British Business Bank notes this is one of its advantages. Expect an arrangement fee on the mezzanine layer, legal and intercreditor costs to document the junior position behind the senior lender, and on equity or a joint venture a profit share rather than a fee and coupon. The cost only makes sense where the development margin can carry it: stretching leverage toward 80 to 90 percent of cost adds a layer of expensive money, so the scheme has to generate enough margin to pay the senior interest, the mezzanine coupon and still leave the developer a return. We disclose our broker fee in writing, model the blended cost of the senior and junior layers against the return the scheme produces, and never claim an exclusive tie to any lender, so the structure is only used where it genuinely helps.

Mezzanine debt, equity or more developer equity

Mezzanine finance is the right tool when a scheme needs more leverage than the senior facility provides and the developer would rather preserve its own equity than commit the full 35 to 40 percent of cost, provided the development margin can carry the higher coupon. It differs from equity or a joint venture, which take a share of the scheme's profit rather than charging a coupon, sharing both the risk and the reward and leaving the developer with less of the upside but no fixed interest cost to service. It differs again from simply committing more developer equity, which is the cheapest option of all but ties up capital that could fund another scheme. The choice turns on the margin and the developer's strategy: where the margin is strong and the developer wants to keep the upside and grow, mezzanine preserves equity at a known cost; where the developer wants to share the risk, equity or a JV fits; and where capital is plentiful and the margin thin, more developer equity is cheapest. We model all three against the scheme so the capital stack fits the deal and the developer's plans, not a single lender's product.