Tenants challenging proposed rent increases at a first-tier tribunal have seen success in the majority of cases since the Renters' Rights Act came into effect on May 1, 2026. Data from property advisory firm PRSim, tracking 971 decisions, shows that 70% resulted in the rent being set lower than the landlord's proposal.
In 47 cases, representing 5% of decisions, rents were reduced below what the tenant was already paying. One example involved a London flat where the rent was cut from £1,300 to £1,050 per month, despite the landlord proposing an increase to £1,400. Deductions were made for water damage, dated fittings, and worn floors.
Another case in Maidstone, Kent, saw a proposed increase from £1,440 to £1,540 reduced to £1,250 by the tribunal, with further deductions for poor thermal efficiency and noise. Only 22% of cases resulted in the landlord's proposed increase being granted in full, while 10% saw the rent remain at its existing level.
Experts warn landlords that poor property condition is often a factor in tribunals trimming proposed increases. Ashley Osborne, a chartered surveyor and founder of PRSim, noted that tribunals often deduct for issues like damp, mould, and dated amenities. He also advised landlords to ensure their rent increase notices are valid and supported by evidence of achieved rents on similar local properties.