Rent controls would likely shrink the number of homes available to let and could push more landlords to sell, according to fresh analysis from the Institute for Fiscal Studies.
The think tank said international evidence points in the same direction: while rent caps can protect some existing tenants in the short term, they also tend to reduce supply, weaken mobility and leave new renters facing a tighter market. The warning lands as pressure builds on ministers to revisit the policy after Labour MPs renewed calls for controls this week.
Landlords now face a clearer political risk than they did a month ago. Even without a live policy change, the IFS intervention matters because it gives investors fresh evidence on where tighter rent regulation could hit returns, property standards and future exit decisions.
IFS says shortages can worsen under rent caps
The debate over rent controls has already moved back into the mainstream, but the IFS paper gives landlords a sharper warning than most political exchanges. Its review said every study in a major 2024 evidence survey found rent controls reduced the supply of rental homes, with some also finding weaker housebuilding.
Researchers Matthew Oulton and Tom Wernham said controls may reduce costs for some sitting tenants, but that benefit often comes with trade-offs elsewhere in the market. They pointed to evidence that landlords become more likely to sell to owner-occupiers or switch homes into other uses when rent growth is restricted.
The report also said rental quality can slip if owners respond by cutting back on maintenance or improvement spending. Evidence from New York, cited by the IFS, found a rise in serious building code violations after controls were introduced.
Why the warning matters now for landlords
That timing matters because the argument is no longer theoretical. A group of MPs has pressed Angela Rayner to change course on rent controls, even after the government said last month it had no plans to introduce them. The IFS is effectively telling ministers that the policy could help one group of tenants while making access harder for the next one.
This follows Landlord Knowledge’s July report on Angela Rayner ruling out rent controls for England landlords, which highlighted the government’s earlier resistance to intervention in rent setting. The latest IFS analysis adds a more detailed economic case for why ministers may keep resisting despite growing political pressure.
There is also a practical warning here for landlords weighing refurbishments, acquisitions or disposals. If rent-setting rules become more restrictive, the value of flexibility rises. Landlords in areas with thin margins, higher repair exposure or bigger borrowing costs would be most exposed if rent growth were capped while compliance costs kept rising.
The IFS said broader housing supply measures and targeted tax-and-benefit support would do more to tackle affordability than rent controls alone. That sits alongside separate pressure for rent-cap powers in Wales, leaving landlords with a familiar message: policy aimed at tenant costs can still end up being shaped by supply-side economics.
More detail is set out in the IFS analysis on whether rent controls work, which draws on evidence from Germany, Ireland, Oslo and parts of the United States.
What this means for landlords
- If you are reviewing your portfolio: factor political risk into any hold-or-sell decision, especially in lower-yield locations.
- If you are pricing improvements: be cautious about assuming future rent growth will always absorb upgrade costs.
- Watch for: any shift in government language when Parliament returns from recess next week.
- Bottom line: the latest evidence strengthens the case that rent controls would squeeze supply before they solve affordability.
Editor’s view
Rent controls remain politically tempting because the short-term promise is easy to sell. The harder part is what happens after landlords stop improving homes, stop buying, or stop letting at all.
Author: Editorial Team – UK landlord & buy-to-let news, policy, and finance
Published: 27 August 2026
Sources: Institute for Fiscal Studies
Related reading: Welsh Government confirms rental bill on rent caps and evictions
