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Evidence / Trade-offs / Member debate

Make the case.
Face the trade-offs.

Rent controls can protect covered renters. They can also affect supply, maintenance and access for people looking for a home. A credible campaign must count both.

England · Checked 4 November 2026 · Sources for this page

What kind of control?

  • In-tenancy stabilisation: limits increases while someone remains in the home.
  • Between-tenancy control: limits what happens when tenants change.
  • Reference rents: set limits using benchmarks for an area and property type.
  • Freeze: stops increases for a period. Its effects and legal design differ from indexed limits.

Consumer Price Index, or CPI, measures inflation in a basket of consumer prices. An inflation-linked cap is one design choice; it does not guarantee that landlord costs or household wages move at the same rate.

What the evidence says

Attributed research finding

Paris: limits linked to local reference rents

Apur reports: the Paris scheme moderated rents by about 5% relative to the estimated counterfactual over six years; no lasting deterioration in rental offer was attributed to the scheme. A counterfactual is an estimate of what would have happened without the policy. Reference rents are benchmarks for comparable homes; this is not simply an inflation cap. Compliance and the study’s advertising-data scope matter.

Attributed research finding

San Francisco: stability and supply

Diamond, McQuade and Qian reports: covered renters were nearly 20% more likely to remain at their address. Diamond, McQuade and Qian reports: landlords affected by the San Francisco expansion reduced rental supply by 15%. The expansion studied is a particular historical scheme. Benefits to covered renters and fewer homes available to other renters must both count in the evaluation.

Attributed research finding

Berlin: a freeze and legal uncertainty

Hahn and colleagues reports: the Berlin freeze lowered advertised rents but significantly reduced available rental properties, with spillovers and legal uncertainty. This is evidence about a strict, short-lived policy—not a direct estimate of any English proposal. Legal authority and new entrants’ ability to find a home matter.

Attributed research finding

Ireland: follow the same properties

ESRI reports: property-level evidence found rent pressure zones limited rental inflation, while the commentary discusses risks to supply, construction, maintenance and mobility. The historical rent pressure zone rules studied covered increases within and between tenancies. The original pack’s description as purely in-tenancy control was misleading. Market indices affected by turnover are not the same as following rents at the same properties. This is not guidance on current Irish law.

Official framework, not an outcome study

Scotland: watch implementation

The Scottish Government reports: designated rent control areas will limit applicable increases during and between tenancies to CPI plus one percentage point, up to 6%, subject to exemptions. The first council reports are due 31 May 2027. A framework for designated areas is not evidence of nationwide effects. Scotland’s earlier emergency measures covered existing tenants; movements in new-let rents alone cannot establish what caused them.

Design lessons, not guarantees

  • Check access as well as rent. Track homes offered for rent, new entrants, displacement and discrimination.
  • Fund enforcement. A right that is difficult to exercise may help confident tenants most.
  • Protect quality. Inspect hazards and evaluate maintenance; do not assume a standards condition enforces itself.
  • Look for avoidance. Conversion, extra charges and exemptions can change who is protected.
  • Build and acquire social homes. Public investment needs money and delivery capacity; a landlord’s sale does not automatically preserve a rental home.

Draft for member debate

Decisions members need to make

  • Is the aim slower increases, lower existing rents, stronger security, or all three?
  • Which inflation and earnings series and reference periods should apply, and what happens when the data is revised?
  • Should changing tenants ever permit an increase within a year? Can unused allowances accumulate?
  • How should initial rents, subdivisions, major conversions and missing rent histories be handled?
  • Which new homes, if any, should be exempt, and for how long?
  • How should maintenance, grants and capital improvements be distinguished, and double recovery prevented?
  • Who verifies histories, resolves disputes and enforces decisions—and with what budget?
  • How should impacts on low-income households, new renters, disabled renters and larger households be evaluated?

How to test the proposal

Publish the intended beneficiaries, implementation budget and measurable goals before a policy starts. Review rent burdens, displacement, supply, maintenance and access over time, using an appropriate comparison rather than a simple before-and-after chart.

Invite objections and publish responses. Member experience belongs alongside evidence; neither should be used to conceal costs borne by other renters.

Turn the argument into specific demands →

Sources for this page