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A private rental sector at an inflection point

The UK's private rented sector is navigating one of the most consequential periods of regulatory and fiscal change in a generation. Within the space of 18 months, landlords have faced the abolition of the Furnished Holiday Let (FHL) tax regime, a 2-percentage-point increase in the stamp duty surcharge on buy-to-let purchases (bringing the total to 5%), the abolition of Section 21 no-fault evictions under the Renters' Rights Act, and the phasing-out of full mortgage interest relief under Section 24. In Northern Ireland, proposals for a mandatory landlord registration scheme add yet another layer of compliance to an already strained sector.

The cumulative effect is structural. Buy-to-let investment has fallen to a 17-year low, with landlords accounting for just 10% of property purchases across Great Britain in Q1 2025, according to Propertymark. Research by Pegasus Insight found that 40% of landlords plan to sell at least one property in the next 12 months, while only 7% plan to buy. The supply-demand equation, never comfortable, is being reset — and tenants are feeling it most acutely in their monthly bills.

The tax and regulatory squeeze: a perfect storm for smaller landlords

The FHL regime's abolition in April 2025 was a watershed moment. Previously, holiday let operators could claim full mortgage interest relief, capital allowances, and business asset disposal relief — advantages that made short-term letting substantially more profitable than long-term residential tenancies for many owners in tourist-heavy areas of Cornwall, the Lake District, the Scottish Highlands, and coastal Wales. From April 2025, those properties have been taxed identically to standard buy-to-let businesses, capping mortgage interest relief at the basic 20% rate.

The practical consequence is a two-way pull on supply. Some former FHL operators, stripped of their tax advantage, are electing to sell rather than pivot — removing stock from both the holiday and the long-term market. Others are converting properties into standard assured tenancies, injecting some supply into local long-term rental markets that had been starved of stock for years. In destinations such as St Ives, Keswick, and Tenby, estate agents have reported a notable uptick in previously short-let properties appearing on the long-term rental market, though the scale of conversion remains uneven.

The higher stamp duty surcharge compounds the exit dynamic at the acquisition end. The Office for Budget Responsibility forecast a 25% drop in second-home purchases in 2025, and analysis by Hamptons suggested landlord property sales could run at roughly double purchases — an estimated 156,000 sales against 84,000 purchases in a single year. With fewer new landlords entering to replace those departing, the net effect on supply is unambiguously negative.

Savills analyst Lucian Cook has noted that the burden falls disproportionately on smaller, individual investors. With 43% of landlords in England owning just a single property, this cohort lacks the corporate structures and economies of scale to absorb rising compliance costs — from EPC upgrade requirements that can run to five-figure sums, to expanding local authority licensing schemes.

Regional fault lines: where the rental squeeze bites hardest

The supply and price pressures are not uniform across the UK. REalyse data across active rental listings reveals a stark regional hierarchy in both asking rents and market velocity — and the fastest-moving markets are often those where regulatory pressure on landlords is already most intense.

Scotland stands out. REalyse data shows average days on market for rental flats in Scotland running at just 33 days, the fastest of any UK region — compared to a UK-wide average closer to 43 days. Average asking rents for Scottish flats sit around £1,130 per month, with the asking rent per square foot at approximately £22.46 per year. In a market where rent controls under the Cost of Living (Tenant Protection) Act 2022 have been a live policy issue, and where the Scottish Government's Housing (Scotland) Act introduced new tenancy protections, landlord supply has tightened significantly. The result is properties being absorbed almost immediately they reach the market.

ONS data for the 12 months to April 2026 shows average private rents in Scotland up 2% year-on-year to £1,019, but that relatively modest headline rate conceals a market where stock is acutely constrained. Analysis by Hamptons reported that Scotland recorded its first annual rent dip in over six years in mid-2025 — a counter-intuitive signal that reflects a combination of tenant affordability limits and some short-term demand cooling, rather than genuine supply recovery.

In England, the regional picture is equally nuanced. The North East recorded the highest annual rental inflation in England at 6.5% according to ONS, even though absolute rents remain the lowest of any English region. REalyse data shows average asking rents for North East terraced properties at approximately £819 per month — the lowest in our dataset — with flats averaging £888. The combination of low absolute rents and high growth rates points to a market where rising costs and landlord exits are compressing a thin stock base against resilient local demand.

At the opposite end of the spectrum, London's rental market is experiencing a relative cooling. REalyse data shows London flats asking an average of £2,565 per month — with a £/sqft annual figure of £46.01, the highest of any region and more than double the national average. Yet London saw the lowest annual rent inflation in England at just 2% (ONS), with inner boroughs recording year-on-year falls. The capital's high absolute rent base is colliding with affordability ceilings: Zoopla data has shown London renters spending over 40% of income on rent, leaving little headroom for further increases regardless of supply dynamics.

In the North West — home to Manchester, Liverpool, and a rapidly expanding build-to-rent pipeline — REalyse data shows rental flats averaging £1,023 per month with days on market of just 40 days, among the fastest in England. The region's relative affordability, strong employment base, and growing young professional population are sustaining demand even as some smaller landlords exit.

Wales presents its own inflection point. ONS data shows Welsh rents rising 4.9% year-on-year to an average of £834 per month — the fastest growth rate of any UK nation. This is partly a base effect (lower starting point), but it also reflects meaningful supply withdrawal in coastal and rural areas where FHL properties dominated and are now exiting or pivoting.

Northern Ireland: registration, compliance, and a landlord sector in transition

Northern Ireland's private rented sector is smaller than its GB counterparts but facing its own distinct regulatory moment. Proposals for a mandatory landlord registration scheme — modelled in part on Scotland's existing landlord register — would require all private landlords to register with a central authority, demonstrate fit-and-proper status, and meet minimum property standards.

Industry bodies, including the National Residential Landlords Association (NRLA), have broadly supported the principle of professionalising the sector, while cautioning that implementation costs and compliance requirements must not tip the balance for smaller landlords already operating on thin margins. ONS data shows Northern Ireland average rents at £877 per month for the 12 months to February 2026, up 4% year-on-year — a meaningful increase in a region where household incomes remain below the UK average and affordability is already stretched.

REalyse data shows Northern Irish rental listings spread thinly by UK standards, reflecting the smaller overall size of the private rented sector relative to owner-occupation. Any registration scheme that prompts even a modest proportion of smaller landlords to exit — consistent with patterns seen after Scotland introduced its register — could have an outsized effect on local supply in towns like Londonderry, Ballymena, and Newry where the rental market is particularly thin.

The experience in Scotland offers a cautionary precedent. The Scottish landlord register, introduced in 2006, did not by itself trigger a landlord exodus, but it operated in a very different environment to today's — before the layering of rent controls, additional dwelling supplement, and the current Renters' Rights Act equivalent. Landlords in Northern Ireland and their advisers would be wise to stress-test portfolio viability against the full stack of anticipated regulatory changes, not just the registration scheme in isolation. REalyse's valuation and yield tools can provide that kind of granular, property-level analysis.

Professional landlords and build-to-rent step into the void

The landlord exodus is real — but it is primarily an amateur phenomenon. Research from Kensington Mortgages found that 84% of professional landlords expect rental yields to increase over the near term, and buy-to-let lending to limited company vehicles has held firm even as individual investor activity has slumped. The divergence is stark: the smaller, mortgage-dependent, single-property landlord faces existential pressure; the professionally structured portfolio operator sees opportunity in the same supply constraints.

Build-to-rent (BTR) is the clearest expression of this institutional confidence. With planning pipeline data tracked by REalyse showing continued BTR scheme activity in regional city cores — particularly Manchester, Leeds, Birmingham, and Bristol — institutional investors are actively expanding into markets vacated by private landlords. These are purpose-designed, professionally managed rental assets that bear little resemblance to the converted Victorian terrace; they offer amenities, flexible leasing, and professional maintenance at a premium price point that mainstream BTR tenants may or may not be able to afford.

The critical question is whether BTR can fill the gap left by departing private landlords at the price points where demand is greatest. TwentyCi analysis from early 2026 suggests the peak of the landlord sell-off may have passed — the proportion of new sales listings that were previously rented fell from a peak of 17.4% in January 2025 to approximately 10.4% by mid-2026, closer to long-term averages. If confirmed, this stabilisation would be broadly positive. But it does not restore the stock lost during the sell-off cycle, and BTR — concentrated in city centres at mid-to-upper price points — is not an obvious substitute for the dispersed, affordable private rented homes that families, sharers, and lower-income renters depend on.

HMO data underlines the urgency. Research by COHO found a 15.2% national fall in available house shares between June and September 2025, with Bradford down 59%, Leeds down 55%, and Manchester down 33% — driven in part by HMO landlords exiting ahead of further regulatory tightening. These are not premium assets; they are the bottom rung of the rental ladder, and their removal from the market has the most acute consequences for the most vulnerable renters.

Outlook: a recalibrating market, not a recovering one

Hamptons has forecast rent growth of 3.5% in 2026 and 3% in 2027 — above both expected wage growth and inflation, and pointing to a structural undersupply that no near-term policy or market shift appears likely to resolve. The rental stock nationally is estimated to be around 34% below 2019 levels according to Hamptons, a hole that BTR and new supply cannot fill quickly enough to offset ongoing landlord attrition.

For property investors and landlords still active in the market, REalyse data provides the granular intelligence needed to navigate this landscape with precision — from identifying which districts and property types offer the strongest remaining yield, to modelling the impact of regulatory costs on portfolio performance, to tracking planning pipeline data that signals where new rental supply (and competition) may emerge. In a market where the margin for error has narrowed significantly, data-led decision-making is no longer optional.

For tenants, the honest outlook is less comfortable. Supply constraints, rising compliance costs, and a reduced pool of rental homes are likely to keep upward pressure on rents in most regions through 2026 and beyond — even as affordability ceilings moderate headline growth in London and other high-cost markets. The regulatory reforms are well-intentioned, but the unintended consequence — a private rental sector with fewer homes, operated by fewer and more professional landlords, at higher rents — is becoming increasingly difficult to ignore.