Rent increases are capped (2% a year or CPI if lower, since 1 March 2026, replacing Rent Pressure Zones) and can generally only happen once every 12 months, following specific notice requirements. A rent increase that doesn’t comply can be disputed at the RTB.

61 Determination Orders published by the RTB to date have been tagged under this dispute type — figure sourced live from the RTB's own public register.

The cap and notice rules changed over time — the RTB’s adjudicators check the applicable rule for the date of the review, whether the national rent-control limit or an exemption applies, and whether the landlord gave the required written notice with the correct information.

If an increase is found invalid, the RTB can direct the rent back to the lawful amount and order repayment of any overpaid rent.

Got a rent increase that doesn’t look right? Generate a letter checking it against the rent-control rules.

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This page summarises RTB dispute rules and cites a live, aggregate count from the RTB's own public taxonomy of published Determination Orders. It does not reproduce any individual case, name, or determination — to review actual published RTB decisions, use the RTB's own case search. Not legal advice.

See also: Invalid Rent Increase — Full Guide · All RTB dispute types