Stretched senior debt: the two-lender stack collapsed into one facility

What a stretch senior facility is, and what it replaces

Conventional senior development finance stops at 60 to 65 percent of project cost. A developer who wants higher leverage has historically added a second loan on top: mezzanine finance on a second charge, taking the combined stack to around 90 percent loan to cost (LTC, debt measured against total project cost). Stretch senior collapses that pairing into one facility. A single lender advances up to 85 or 90 percent of cost as of June 2026, holds a single first charge over the site, and prices the whole loan at one blended rate. There is no second lender, so there is no second credit process, no second set of legals, and no intercreditor deed governing who gets repaid first, because there is only one creditor.

The leverage is capped twice: against cost, at 85 to 90 percent, and against gross development value (GDV, the end sales value), typically at 70 to 75 percent loan to GDV. Whichever cap bites first sets the facility. The double cap is why stretch lending self-selects for profitable schemes: on a thin margin the LTGDV cap cuts in long before 90 percent of cost, and the stretch quietly becomes an ordinary senior loan with a higher rate. Where the facility sits relative to every other layer is mapped on our capital stack page.

What stretch does not do is reach 100 percent. The final 10 to 15 percent of cost still comes from the developer or an equity partner, which is why stretch facilities are the debt backbone of most 100% development finance structures: the bigger the first facility, the smaller the slice that has to share profit.

Pricing the single facility: 9.5 to 13 percent per annum in June 2026

Stretch senior prices at 9.5 to 13 percent per annum as of June 2026, with arrangement and exit fees of 1 to 2 percent each, against 7 to 11 percent for conventional senior debt. The premium has a clean mechanical explanation: a stretch lender is really running two risk positions inside one loan. The slice up to 65 percent of cost carries senior risk and would price at senior rates on its own; the slice from 65 to 90 percent carries mezzanine risk, the part that burns first if values fall, and would price at 14 to 20 percent on its own. The single rate is the weighted average of the two, which is why a stretch quote of around 10.5 percent on a 90 percent LTC facility is neither cheap senior nor expensive senior: it is senior and mezzanine blended and relabelled.

That framing gives you the correct comparison test. Never compare a stretch rate to a senior rate; compare it to the blended cost of the two-lender stack it replaces, weighted by the size of each slice, plus the duplicated fees and time the second lender adds. We run exactly that calculation in the worked example below, and our capital stack calculator runs it on your own numbers.

One lender, one valuation, one monitoring surveyor: what simplicity is worth in pounds

The one-lender structure saves money in places developers rarely cost out. One valuation instead of two: mezzanine funds frequently instruct their own, at £3,000 to £6,000 on a scheme this size. One set of facility legals instead of two, saving £10,000 to £15,000 in lender-side costs the borrower pays. No intercreditor deed, which on a two-lender deal adds £8,000 to £15,000 of legal fees and, more expensively, three to six weeks of negotiation while the land contract runs. One monitoring surveyor (the lender's surveyor who certifies each stage of the build before drawdown) instead of two sets of monitoring arrangements, saving £1,500 to £2,500 per drawdown cycle. Across an 18-month scheme the cash saving is commonly £25,000 to £40,000 before counting time.

The operational saving is harder to price and larger. Every variation during a build, a cost overrun, a programme slip, a change to the sales strategy, needs lender consent. With one lender that is one conversation; with two it is two credit processes and an intercreditor question about whether the senior cap allows it. When a scheme hits genuine trouble, a single lender can restructure in days; two lenders negotiate with each other before either negotiates with you. Developers who have been through a workout on a layered stack tend to become stretch borrowers permanently.

Worked comparison: senior stretch loan versus senior plus mezzanine on a £2.4m GDV scheme

The house example we use across this site: GDV £2,400,000, land £600,000, build £1,000,000, 10 percent contingency, hard costs £1,700,000. Route one, the two-lender stack: senior development finance of £1,105,000 at 65 percent LTC and 8.5 percent per annum, plus a mezzanine facility of £425,000 at 16 percent taking the stack to 90 percent. Total debt £1,530,000 at a blended rate of 10.6 percent. Add the second lender's costs: a 2 percent mezzanine arrangement fee of £8,500, roughly £12,000 of extra legals and valuation, and £8,000 to £15,000 of intercreditor work, call it £30,000 of duplication. Route two, a stretch facility of £1,530,000 at 10.5 percent: near-identical interest, one fee set, no duplication.

On these numbers the stretch wins by roughly £30,000 and four weeks. Now move one input: suppose a bank senior facility is available at 7.5 percent rather than 8.5. The blended two-lender rate falls to about 9.9 percent against the stretch at 10.5, worth around £14,000 over 18 months on £1,530,000, and the structures finish within £15,000 of each other. That is the honest shape of the comparison: stretch wins when senior pricing is unremarkable, when speed matters, or when the mezzanine slice is small enough that duplicated costs swamp the rate saving; the two-lender stack wins when genuinely cheap bank senior anchors the bottom 65 percent and the scheme is large enough to amortise the second lender's costs.

Both routes leave the developer funding about £170,000 of hard costs plus working capital, against roughly £595,000 with plain senior alone. What each leverage level demands in cash, and every route to reducing it, is covered in our guide to how much deposit development finance requires.

From the lender side: how a stretch lender underwrites the top slice

Having sat on the lending side at Bank of Scotland and Lloyds Banking Group, our founder's observation is that the question inside a stretch lender's credit committee is not "is this a good scheme?" but "are we being paid for the slice that behaves like mezzanine?". A committee approving 90 percent of cost knows that the last 25 points of the loan have first-loss exposure: a 12 percent fall in GDV on the worked example consumes the developer's profit and starts eroding the loan. So the underwriting concentrates where that slice is defended: the evidence behind the GDV, comparable by comparable; the fixed build price and the contingency behind it; and the developer's behaviour on previous schemes when something went wrong, which references and monitoring histories reveal more reliably than CVs.

The same logic explains why banks rarely write stretch. Under PRA (Prudential Regulation Authority) capital rules, development lending at high leverage attracts capital charges that make a 10.5 percent coupon uneconomic for a bank balance sheet, which is why the stretch market is dominated by specialist lenders and private credit funds running investor capital outside bank rules. It is also why a stretch lender's monitoring is tighter than a bank's: monthly surveyor visits, drawdown against certified cost, and cost-to-complete tests at every stage. The facility is more flexible than a two-lender stack, but it is not lazier.

When stretch wins, and when the two-lender stack still beats it

Stretch senior is the right structure in four situations. Speed: one credit process and no intercreditor negotiation routinely saves four to six weeks, decisive on a tight land contract. Smaller schemes: below roughly £3m of costs, the second lender's fixed costs are too large a share of a small mezzanine slice to justify, and dedicated mezzanine appetite under £500,000 is thin anyway. Simplicity through the build: developers who expect variations, phased sales or a possible refinance want one consent, not two. And first relationships with a leverage step: a developer moving from 65 to 90 percent of cost for the first time is better doing it inside one lender's monitoring than between two.

The two-lender stack keeps its place in three situations. Cheap senior anchors: where a bank relationship prices the bottom 65 percent at 7 to 8 percent, the blended cost can undercut any stretch quote, and the saving scales with scheme size. Existing senior terms: a developer with a senior facility already credit-approved adds mezzanine on top faster than re-papering the whole debt with a new stretch lender. And leverage beyond 90 percent: stretch stops at 90 percent of cost, so a structure aiming at zero cash still needs an equity layer, at which point the comparison becomes stretch-plus-equity against senior-plus-mezzanine-plus-equity and the arithmetic should be run, not assumed.

What stretch senior development finance lenders look for, and who lends it

The qualifying tests mirror the leverage. Profit on cost of 20 percent or better, because the LTGDV cap makes thin schemes unfundable at stretch leverage regardless of appetite. Planning permission granted: stretch lenders do not carry planning risk at 90 percent of cost. A completed-scheme track record, or an experienced main contractor on a fixed-price contract where the sponsor's own record is short. A credible exit, evidenced by comparable sales or a refinance route. And the standard security package: first charge, debenture, share charge, a personal guarantee typically capped at 20 to 25 percent of the facility, and a cost overrun guarantee.

Three lender groups quote stretched senior in June 2026. Specialist development lenders: BLG Development Finance publishes stretch senior terms to 90 percent of cost on facilities up to £15m over terms to 24 months, and Clearwell Capital runs a published senior stretch criteria set aimed at SME residential schemes, with over £400m lent across its history. Challenger banks, including OakNorth and Shawbrook, stretch to 80 to 85 percent LTC on larger tickets with tighter covenants and stronger sponsor requirements. And private credit funds, including ASK Partners and Maslow Capital, go to 90 percent of cost where profit on cost clears 20 percent and the sponsor has completed schemes. Matching the scheme to the group that actually has appetite at its size and leverage point is the placement job; sending a £1.5m facility to a fund with a £5m minimum wastes weeks.

Senior, stretch and senior-plus-mezzanine compared, June 2026

Indicative comparison across the UK market as of June 2026, using the £2.4m GDV house example with £1.7m of hard costs. Figures are the realistic band, not a quote.

Ranges are indicative, as of June 2026, and depend on profit on cost, track record, scheme size, build contract and location at the time of introduction.

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