Where mezzanine sits - the development funding stack UK
The development funding stack UK schemes assemble has three layers, each with its own risk, security, and price:
- Senior debt (60-65% of costs) - first charge, first repaid, cheapest: standard development finance at roughly 0.85-1.1% per month
- Mezzanine (the next 20-25%) - second charge, repaid after the senior, priced for its position: typically 12-20% annually
- Developer equity (the final 10-15%) - first money in, last money out, unpriced but the scarcest resource on every scheme
Mezz exists because the middle layer is too risky for senior pricing and too fundable to demand equity returns. It converts what would be £350,000 of your cash on a typical scheme into £120,000 - and that difference is the entire strategic point.
The equity multiplier - the maths that justifies the rate
Take a £2.4m GDV scheme with £1.8m total costs and £480,000 projected profit:
- Without mezz: senior at 62% of costs = £1.116m; your equity = £684,000; profit £480,000 = 70% return on equity
- With mezz: senior £1.116m + mezzanine loan property development UK layer of £450,000; your equity = £234,000
- Mezz cost over 18 months: roughly £110,000 - profit falls to £370,000
- But return on equity: £370,000 on £234,000 = 158% - and £450,000 of your cash is free to run the next scheme simultaneously
- Two schemes on the same equity at 158% beats one scheme at 70% - that arithmetic is the entire mezz market
Stretch senior debt UK - the one-lender alternative
Stretch senior debt UK lenders offer bundles senior and mezz economics into a single facility - one lender, one charge, one relationship, priced between the layers.
Stretch senior versus senior-plus-mezz:
- Stretch senior advances 75-85% of costs in one facility at a blended rate - simpler, faster, one set of legals
- Separate mezz stretches further - to 90% of costs - and lets each layer be competed independently
- Stretch avoids intercreditor negotiation entirely; separate stacks need the two lenders’ deed agreed
- Pricing crossover: at moderate leverage stretch often wins; at maximum leverage the separate stack usually prices better
- Speed: stretch completes like one loan; adding mezz to a senior adds 2-4 weeks of structuring
Stretch senior debt UK - one lender to 75-85% of costs, or a layered stack to 90%: leverage need and speed decide between them.
What mezz lenders assess - and the intercreditor deed
- The margin - mezz wants 20%+ profit on GDV surviving after its own cost: the layer lives inside the profit, so the profit must be real
- Sponsor track record - mezz is a bet on delivery; completed comparable schemes matter more here than anywhere in the stack
- The senior’s terms - mezz underwrites the whole stack, including the facility ranking ahead of it
- Exit realism - sales evidence or refinance capacity covering both layers with headroom
- The intercreditor deed - the senior-mezz agreement governing standstill periods, cure rights, and enforcement order: commercial terms worth negotiating, not boilerplate to sign
The discipline - when mezz is wrong
Mezz amplifies outcomes in both directions. It is wrong for thin-margin schemes (under ~18% on GDV there is nothing for the layer to live in), wrong as a rescue for cost overruns (pricing distress at 20% compounds distress), and wrong for first schemes - beginners covered in our property development finance for beginners UK guide should build track record before leverage. The professional rule: mezz funds the next scheme’s opportunity, never the current scheme’s problem. Structured that way - honest margin, proven delivery, negotiated intercreditor - mezzanine finance is how development businesses compound instead of queueing.
Process and timeline - adding mezz without losing weeks
Mezz structuring runs 2-4 weeks alongside the senior: terms in days once the appraisal and track record land, then valuation reliance letters, the second charge, and the intercreditor deed in parallel with the senior’s legals. The sequencing rule that protects the timeline: agree the senior’s identity first, because mezz lenders price and paper against a known senior - and some pairs of lenders simply work together faster, having agreed intercreditor templates on previous deals. A broker who knows the working pairs saves the fortnight that ad-hoc pairings spend negotiating standstill clauses from scratch. Start the mezz conversation the day senior terms arrive, not the day they complete.
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