In short: This is commentary based on what we see in our practice, not a market survey. From the cases our clients have brought us in H2 2026, the specialist lender panel for short-term let mortgages appears narrower than it was in H1, LTV ceilings appear to have tightened, and lenders are asking harder questions about planning status than they were a year ago. Operators approaching remortgage or acquisition should expect the planning question to be asked and should have a clean answer ready.
STL Solutions does not broker mortgages or arrange finance. What we do see, often, is operators whose finance application has stalled because the lender has asked a question about planning that the operator did not have a ready answer to. Those cases have become notably more common in the caseload we have handled through 2026.
What we are seeing in the market
Three patterns are worth naming — these are observations from our own practice rather than named-lender market intelligence:
1. Fewer active specialist products. Where several specialist STL lenders were quoting broadly in 2024, we now see a narrower panel doing so at scale in 2026. We are not naming specific lenders here; a broker will give you a current live-market picture. 2. Tighter LTVs on the products that remain. Higher LTVs (over 70%) are typically now reserved for properties with a strong evidenced trading history rather than being available across the board. Holiday-let lenders often stress on a seasonal average model (low/mid/high weekly rates × around 30 lettable weeks) rather than the standard buy-to-let 145% ICR at product rate plus 2%. 3. A rise in "planning status" questions at application. Lenders are increasingly asking directly whether the property holds planning permission or a Certificate of Lawfulness for short-term let use. Where the operator's answer is "no" or "not sure", the application is more likely to be declined, downgraded, or moved to a higher rate.
Why the planning question matters to lenders
A lender's exposure on a short-term let is largely a function of whether the income used to service the loan can continue. Where the local authority can, in principle, serve an Enforcement Notice that forces the property to be discontinued as a short-term let, the lender's income assumption is contingent. A Certificate of Lawfulness removes that contingency. A planning permission removes it. A licence, on its own, does not.
This is a relatively new area of focus for underwriters and is not consistently applied. But it is becoming more consistent, and operators seeking to remortgage or acquire additional properties in the second half of 2026 should expect the question to be asked.
What operators should do
1. Have a clear answer ready to the planning question. Whether the answer is "we hold a Certificate of Lawfulness", "the use pre-dates the current requirement" or "planning permission is on file", the answer should be evidenced and to hand. (There is currently no C5 use class in force in England, so "it's C5 and permitted" is not yet a live answer.) 2. Where the answer is "not sure", get it clarified before applying. An application that stalls on the planning question is worse than a slightly delayed application that begins with a clean answer. 3. On a portfolio remortgage, address the weakest planning position first. A single unit with a questionable planning position can drag the whole portfolio into difficulty. Get it into a defensible state before the underwriting starts. 4. On acquisition, treat the planning position as part of due diligence. Do not close on the assumption that "the current owner has been operating it fine". That is not the assessment the lender will apply, and it is not the assessment the enforcement team will apply either.
The overarching pattern is the same one we see in insurance, in tax, and in the planning system itself: the operators whose planning position is clean and evidenced have options. Those whose planning position is unresolved have fewer options, and, increasingly, worse terms on the options they do have.
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