Three numbers landed this week that add up to one story: the private rented sector is shrinking just as demand for it picks up for autumn. Buy-to-let incorporations look set for their first annual fall since 2008, Zoopla is forecasting rents up by as much as 5 per cent by year-end as supply shrinks for the first time in three years, and rental tribunal cases have jumped 56 per cent in a single quarter. Landlords are pulling back, and it’s tenants in the cheapest homes who are paying for it first.
Buy-to-let incorporation, the landlord’s tax fix since 2017, is running out of road
Hamptons’ analysis of Companies House data, reported by Landlord Today today, shows landlords set up 41,483 buy-to-let companies in the first eight months of 2026 — 8 per cent fewer than the 44,802 formed over the same period in 2025. August alone saw a 22 per cent year-on-year drop, just 4,198 new companies against 5,363 a year earlier. If the trend holds for the rest of the year, 2026 will be the first calendar year since 2008 that new BTL company formations have fallen. That’s an odd result on its own, because the overall stock of operating BTL businesses is still growing — up to 469,165 by the end of August, from 443,272 at the end of 2025 — so landlords already inside a company structure aren’t leaving it. It’s the flow of new entrants that’s drying up.
Digging into the 2025 numbers, Hamptons found that only around 47 per cent of the roughly 81,800 properties that moved into limited company ownership that year were new purchases — the rest were existing landlords transferring properties they already owned into a company, chasing the tax treatment that’s applied to company-owned lets since individual landlords’ mortgage interest relief began being restricted from 2017. Hamptons puts it plainly: the changes “permanently altered how many landlords choose to structure new investments,” but “a significant share of the growth in BTL company numbers has not come from new investors, but from existing landlords transferring properties they already owned.” Hamptons now estimates just over half of 2026’s incorporations are genuine new purchases — meaning even the transfer wave, the backlog of existing landlords catching up on a decade-old tax change, is thinning out.
Read together, that’s a landlord base that has mostly finished restructuring and isn’t being replaced by fresh investment at the same rate. For a surveying practice that matters directly: purchase surveys and valuations for new BTL acquisitions are one of my more reliable sources of work, and if company formations really are falling for the first time in 17 years, the pipeline of new investor purchases is thinning with them.
Anyone still weighing whether to incorporate an existing portfolio should get the sums run properly now, with an accountant and against a current valuation, not a five-year-old spreadsheet, because the mortgage and stamp duty costs of transferring into a company haven’t stood still. And anyone buying a first BTL through a company while others are stepping back should treat the thinner competition as a reason to get a fuller survey, not a lighter one; fewer buyers chasing a property doesn’t mean fewer defects in it.
Rental supply just shrank for the first time in three years — and cheap homes are absorbing the hit
Zoopla’s latest Rental Market Report, covered by Landlord Today yesterday, shows UK rents up 2.6 per cent over the past year to an average of £1,340 a month, with Zoopla now forecasting growth of 4 to 5 per cent by the end of 2026. The driver is supply: the number of homes available to rent fell 6 per cent in August and is down 3 per cent year-on-year, the first sustained decline after three years in which rental supply had been steadily recovering. Enquiries per listing are up 6 per cent annually to 5.3, the highest in 22 months. Zoopla’s Richard Donnell put it simply: “The rental market is starting to tighten again after three years in which the supply of homes for rent has steadily improved and rental growth slowed easing the pressure on renters.”
The regional and price-band detail matters more than the headline. London rental growth jumped from 1.7 to 2.9 per cent as supply there fell 6 per cent, with inner London postcodes down 13 per cent. Yorkshire and Humberside saw supply drop 12 per cent. Wales is the outlier — supply up 7 per cent and growth slowing accordingly, which rather proves the point that supply, not some abstract demand surge, is doing the driving. And the squeeze isn’t landing evenly: homes renting for under £750 a month saw growth of 5.4 per cent, more than double the national rate.
Put this next to the buy-to-let incorporation numbers and the picture is consistent rather than coincidental: fewer new landlords buying, existing ones not expanding, and a rental stock that isn’t being replenished at the rate tenants need it. The properties absorbing the biggest rent rises are the cheapest ones, which tells you who’s actually short of options — it’s not the tenant who can stretch to a £2,000-a-month flat, it’s the one competing for a £700-a-month room or studio.
If you’re a landlord holding at the affordable end of the market, this is the year the numbers finally support spending on the property rather than just banking the rent — a tighter market gives you room to fund an EPC upgrade or a proper condition survey out of improved yield without pricing yourself out of demand. If you’re a tenant coming up to renewal on a lower-rent property, budget for an above-average increase and start looking earlier than you would have two years ago; the enquiries-per-listing figure alone tells you competition for anything decent and affordable has sharpened.
Property tribunal cases jumped 56 per cent in a quarter — and Housing Act disputes are riding along
Landlord Today reported on 11 September that the First-tier Tribunal (Property Chamber) heard 15,929 cases in the year to the end of June 2026, 24 per cent more than the year before. The growth accelerated sharply in the most recent quarter: April to June alone saw 4,613 cases, 56 per cent more than the same quarter a year earlier. The figures span rent cases, leasehold enfranchisement claims, leasehold disputes, Housing Act 2004 cases and park homes — in other words, most of the disputes a private landlord or leaseholder is likely to end up in front of a tribunal for.
Savills’ head of residential research, Lucian Cook, reading the same data, expects worse: “As the Renters Rights Act beds in, we’d expect to see the number of cases referred to Tribunal rise exponentially, particularly in respect of rent reviews.” That’s a fair reading — a lot of the Act’s new machinery, from open-ended tenancies to the restricted grounds for possession to the process for contesting a rent increase, routes disagreements that used to be resolved, or just absorbed, informally straight into a tribunal application instead.
The Housing Act 2004 cases are the ones that land on my desk indirectly. Those are typically category 1 and category 2 hazard disputes — damp, mould, disrepair, the exact territory a building survey or a condition report exists to document. As that caseload grows alongside the rent-review cases, the evidence landlords and tenants bring to a hearing is going to matter more, not less, and a same-day phone photo of a damp patch is a poor substitute for a dated, professional report.
If you can see a dispute coming — a rent review a tenant is likely to contest, or a hazard complaint you disagree is as serious as claimed — commission an independent condition report or survey before the tribunal date is set, not after. Evidence prepared under pressure a week before a hearing reads differently to a tribunal than evidence that was already on file when the disagreement started.
What I’d actually do
- Considering incorporating a buy-to-let portfolio? Get the transfer costs and a current valuation run properly by an accountant — don’t work from an old spreadsheet.
- Buying a first BTL through a company while others retreat? Get a fuller survey, not a lighter one — thin competition doesn’t mean fewer defects in the stock.
- Letting at the affordable end of the market? Use this year’s improved yield to fund an overdue EPC upgrade or condition survey rather than just banking the rent.
- See a rent-review or hazard dispute coming? Commission an independent condition report before the tribunal date is set, not after.
Today’s numbers point the same way: fewer landlords coming in, less stock for the ones already renting, and more of the disagreements that follow ending up in front of a tribunal. The practice carries out Building Surveys and Buy to Let Surveys across the South East for landlords who’d rather have the evidence before a dispute than during one. Get in touch.
Small print. General commentary, not advice for your specific circumstances — regulations, schemes and deadlines change, and your property is not the average property. Sources linked were accurate when read on 15 September 2026.