What landlords must prove to increase rent above the cap depends on the property, the tenancy, the applicable Rent Pressure Zone rules and the reason relied on for the increase. A landlord may need to establish that an exemption applies and keep records supporting the calculation, rather than simply stating that market rents have risen. This guide explains the evidence that may matter, how special situations such as properties not let in two years are treated, and what tenants can do if they are unsure about a proposed increase. Rules can change, so both parties should check the current RTB guidance for the relevant date and circumstances.
What landlords must prove to increase rent above the cap
In a Rent Pressure Zone, the starting point is generally that a rent review must comply with the rent-increase rules applying at the time. A landlord who seeks to charge more than the permitted limit may need to show that the tenancy or property falls within a recognised exception, or that a different statutory rule applies. The precise test can depend on when the tenancy began, whether the property is in an RPZ, whether the accommodation was substantially changed, and whether earlier rent reviews were carried out correctly.
The key question is not simply whether the landlord believes the current rent is below the local market level. A landlord may need to identify the legal basis for the proposed increase, explain how the amount was calculated, and provide the information required in the rent review notice. Relevant records can include the previous rent, dates of earlier reviews, the tenancy agreement, evidence of works, records showing when the property was last let, and any documents connected with a claimed exemption.
A tenant should therefore ask for the reason and supporting details in writing, while continuing to treat any formal notice or deadline seriously. The tenant should not assume that an increase is invalid merely because it is higher than expected, and should not ignore the notice while investigating it. If the explanation is incomplete or disputed, the RTB dispute resolution process is the standard route for having the issue considered, and a solicitor may be appropriate where the sums or legal issues are significant.
Evidence needed for an above cap rent increase
A landlord relying on an exemption usually needs evidence that addresses every part of the relevant test. For example, where the reason concerns substantial renovation or a material change to the property, photographs, invoices, planning or building documents, contractor records and a clear description of the work may be important. Cosmetic decoration or ordinary maintenance may not have the same significance as works that materially alter the accommodation, so the nature, extent and timing of the work matter.
Where the proposed rent is based on a permitted market review rather than a special exemption, the landlord may need to show how the rent compares with similar properties. That can involve appropriate comparable properties, details of their location, size, condition, facilities and letting date. Comparable rental evidence should be relevant and reasonably close in time; a list of unrelated advertisements or unusually expensive properties may not explain the calculation adequately.
A tenant checking the notice should compare the proposed figure with the previous rent and examine whether the notice states the required information. It can be useful to create a short chronology showing the tenancy start date, every rent review, dates of any works and the date the notice was received. If the landlord has relied on advertisements, the tenant can record when those properties were advertised and whether they were genuinely comparable, without assuming that a disagreement about market value by itself decides the legal issue.
Properties not let in two years and other exemptions
One frequently discussed issue is the RPZ exemption for properties not let in 2 years. The description is shorthand for a rule that may apply where a property has not been let for the relevant period, but the exact legal conditions and evidence requirements must be checked against current legislation and RTB guidance. The fact that a property was empty is not necessarily enough on its own; the landlord may need reliable records showing when the previous tenancy ended and when the new letting occurred.
Useful records may include the previous tenancy agreement, rent receipts, termination correspondence, utility information, management records and the new tenancy documents. A property that was occupied by the owner, used for another lawful purpose or subject to a different arrangement may raise different questions from a property that was genuinely vacant. The date on which the relevant period is measured, and whether the property falls within the statutory definition, can be decisive.
Other possible exemptions may relate to a new tenancy, substantial change to the dwelling or a type of accommodation covered by separate rules. Exemptions are fact-sensitive and may have notice, documentation or timing requirements, so a landlord should not rely on a label such as newly renovated or previously vacant without checking the underlying rule. A tenant who doubts the claimed exemption should request the basis and supporting information promptly, keep copies of all correspondence and consider RTB dispute resolution within any applicable time limit.
RPZ rules for approved housing bodies and local comparisons
Approved housing bodies can be subject to specific arrangements, but their status does not mean that every rent increase is automatically outside RPZ controls. The RPZ rules for approved housing bodies may interact with the type of tenancy, the funding or designation of the accommodation and any legislation applying to that housing. Both landlord and tenant should identify the exact organisation and tenancy type rather than assuming that rules for private landlords answer the question.
The local market can provide context, but it does not by itself prove that an above-cap increase is allowed. Someone searching for the Average rent increase in Wexford, for example, may find figures that describe general trends or advertised rents, while the legal calculation for one tenancy may depend on its own review history and statutory category. Average figures can be useful background information but should not replace the required notice, records or comparable-property evidence.
For an approved housing body tenancy, a tenant should ask which statutory or contractual provision is being used, how the proposed amount was calculated and whether the organisation has supplied the information required by its rent policy or the relevant legislation. The landlord or housing body should retain a clear audit trail showing the old rent, the new rent, the effective date and the reason for the change. Where the parties cannot resolve a disagreement, they should verify whether the RTB has jurisdiction and use the appropriate dispute route rather than withholding rent or attempting self-help.
How tenants can check and challenge the increase
Start by preserving the complete notice, envelope or email metadata, tenancy agreement, rent book or payment records and any earlier notices. Check the property address, the effective date, the stated reason, the amount of the increase and whether the notice includes the information required under the current rules. Compare the proposed increase with the last valid rent review, because an error in the review date or starting rent can affect the calculation even where the landlord has a genuine reason for seeking more rent.
Next, ask focused written questions rather than making a broad accusation. Ask whether the landlord relies on an exemption, what dates support it, what work was carried out if renovation is claimed, and which comparable properties were used if a market comparison is relevant. Keep a written evidence trail by saving messages, noting conversations and requesting documents in a calm, specific way; this can help the RTB or an adviser understand the sequence of events.
Do not ignore a notice because it appears defective, and do not assume that stopping rent payments will protect your position. Rent arrears or a breach of tenancy obligations can create separate problems, even where the increase is being challenged. If the parties cannot agree, check the current RTB deadlines and application requirements promptly, and obtain independent legal advice where there is an eviction risk, a large disputed amount, a complex exemption or a question about the RTB's jurisdiction.
Key Takeaways
The central issue is the legal basis for the proposed increase and the evidence supporting it. A landlord may need to prove the relevant dates, the previous rent, the calculation, the property's status and any claimed exemption, rather than relying only on general statements about inflation or local demand. The applicable rules can change, so current RTB guidance should be checked for the date of the notice and the type of tenancy.
Tenants should review the notice carefully, request the supporting explanation, preserve documents and act within any applicable deadline. Issues involving substantial works, a property not let for the relevant period, an approved housing body or comparable rents can require different evidence. The phrase RPZ exemption for properties not let in 2 years should not be treated as a complete answer without checking the statutory conditions and records for the particular property.
An above-cap increase is not decided by this publication, and neither a landlord's assertion nor a tenant's objection automatically determines the outcome. The RTB dispute resolution process is the usual formal route for a landlord-tenant disagreement within its remit, while a solicitor can advise on complicated or urgent cases. Both sides should avoid self-eviction, withholding rent or ignoring notices, and should confirm the current requirements before taking action.