RPZ rules for new tenancies vs sitting tenants can produce different results when a landlord sets or reviews rent in a Rent Pressure Zone. The relevant rules may depend on whether the tenancy is continuing, has ended and restarted, or falls within an exemption. This guide explains the main distinctions, how rent setting and rent reviews are approached, what records to request, and where to check the current position before acting.
Why new tenancies and sitting tenants differ
A sitting tenant is generally someone who remains in an existing tenancy while the landlord carries out a rent review. A new tenancy usually begins after a previous tenancy has ended, although the legal treatment can depend on how and why the earlier arrangement ended. Simply signing a new agreement or changing the named tenant does not automatically determine which rules apply.
The distinction matters because rent review rules are designed to regulate increases during an ongoing tenancy, while rent setting rules may apply when a property is being let to a new tenant. Even then, a landlord may need to show that the tenancy genuinely ended and that any different rent-setting treatment is permitted. The condition of the property, the reason for the new letting and the history of the previous tenancy can all be relevant.
Tenancy status and the reason it changed are therefore important starting points. A tenant should establish whether they are dealing with a continuing tenancy, a valid new tenancy after a genuine vacancy, a change of landlord, or a situation where the original tenant left because of an alleged breach or termination. These categories can have different consequences, so a conclusion should not be based only on the wording of the latest lease.
The Residential Tenancies Board provides current guidance on rent reviews, rent setting and Rent Pressure Zone requirements. Because legislation and transitional arrangements can change, readers should check the RTB guidance that applies on the relevant date and consider professional advice where the classification is disputed. A written request to the landlord asking how the rent was calculated can also help identify the issue early.
RPZ rent increase cap explained for sitting tenants
For a sitting tenant, the central question is usually whether the proposed rent review follows the rules applying to an ongoing tenancy. The landlord may need to use the prescribed method for calculating the permitted increase, comply with the required review timing, and serve a valid rent review notice. The notice may also need to include information that allows the tenant to understand the calculation and check whether the process has been followed.
A tenant should read the proposed notice carefully rather than treating the new amount as automatically payable. Check the date of the last valid rent review, the date on which the new rent is intended to begin, the calculation used and any supporting information supplied. Also check whether the property was in an RPZ on the relevant date, as zone status and legislative rules can change over time.
The review date, calculation method and required notice details are common decision points in an RPZ rent increase dispute. A landlord may have used an outdated formula, counted a non-compliant earlier increase, or selected the wrong starting rent. Conversely, a tenant may overlook a valid notice because the proposed increase appears unfamiliar, so the current RTB requirements should be checked rather than relying on assumptions.
Do not respond to a disputed increase by withholding rent or taking other unilateral action without advice. Keep paying the amount that is properly due while promptly asking the landlord for clarification and confirming the position with the RTB or a solicitor. If the parties cannot resolve the disagreement, the RTB dispute resolution process is the standard route for seeking a determination, subject to applicable application deadlines.
How rent setting may work for new tenancies
When a property is let to a new tenant, the landlord may be dealing with an initial rent-setting question rather than an ordinary rent review. In an RPZ, the applicable rules can restrict how the initial rent is set, but there may be statutory exceptions or special procedures. The landlord should be able to identify the basis for the proposed rent and should not assume that calling the arrangement a new tenancy removes all RPZ obligations.
A tenant comparing a proposed rent with the previous rent should request relevant information in writing. Useful documents may include the previous tenancy details, the date the property became vacant, the reason for the vacancy and the landlord's explanation of any exemption or permitted calculation. Tenants should also retain the advertisement, offer emails, lease, payment records and photographs, because these may help establish what was represented before the tenancy began.
A genuine new letting after a lawful vacancy may be treated differently from a continuing tenancy, but the facts matter. For example, a tenant who leaves voluntarily and is replaced by an unrelated tenant may raise different questions from a tenant who remains in occupation while a landlord issues a replacement agreement. A change in ownership, a family arrangement, or a termination connected with alleged non-compliance may also require careful examination.
New tenancy does not automatically mean unrestricted rent setting. The relevant test may involve the date of the letting, the property's RPZ status, the previous rent, the reason for the previous tenancy ending and whether a statutory exemption was properly available. Before accepting a claimed exemption, a tenant can ask the landlord to explain it and should verify the current RTB guidance for the particular circumstances.
Checking Dublin and other RPZ rules
The phrase Dublin rent pressure zone rules and cap is often used as though Dublin has a separate rent system from every other RPZ. In practice, the answer depends on the legislation applying to the property, the date of the proposed increase or letting, and any national changes that affect all or some zones. Dublin properties may be subject to the same broad statutory framework as other designated zones, but local designation history and specific facts can still matter.
Use the RTB's current RPZ information to check whether the address was covered on the relevant date. Do not rely only on an old map, a letting advertisement or a previous tenancy agreement, because the legal position may have changed since those documents were prepared. It is also important to distinguish the date a property entered or left a zone from the date the landlord served a notice or the new rent was due to start.
The Government review of rent pressure zone policy may lead to changes in how rent regulation operates, including changes to the treatment of new lettings or continuing tenancies. A policy announcement, consultation or review is not necessarily the same as a rule already in force. Tenants and landlords should identify the commencement date of any enacted change and follow the RTB's updated guidance rather than applying a proposal retrospectively.
Check the address, the relevant date and the law then in force before making a decision. Save a copy of the RTB page or official guidance used, together with the rent notice and correspondence, so there is a clear record of the information relied on. If the dates do not line up or the landlord and tenant have different versions of events, early advice is safer than assuming one interpretation is correct.
What to do when the rent looks wrong
Start by creating a simple chronology. Record when the tenancy began, any earlier tenancy or rent review, when the landlord gave notice, when the new rent is meant to apply, and when payments were made. Gather the lease, rent receipts or bank statements, notices, emails, text messages and any documents explaining why the tenancy started or ended.
Next, ask focused questions in writing. A tenant can request the calculation used, the date of the last review, the reason the landlord considers the arrangement a new tenancy, and the legal basis for any claimed exemption. A landlord should avoid presenting a bare figure without the information needed to understand it, while a tenant should allow a reasonable opportunity for the issue to be clarified rather than escalating immediately on incomplete facts.
If the disagreement continues, the RTB dispute resolution service is the usual formal path for a landlord and tenant dispute. The process may involve mediation or adjudication, depending on the application and the parties' choices, and the parties should follow the RTB's current procedures and time limits. A solicitor or qualified housing adviser may be especially useful where a notice of termination, possession issue, substantial arrears or a complicated tenancy history is involved.
Do not ignore a notice or miss a deadline because you believe an RPZ calculation is defective. A potentially invalid rent notice or termination notice should be checked promptly, and any available dispute or response deadline should be confirmed with the RTB or a solicitor. Withholding rent, changing locks, refusing access or attempting self-help enforcement can create separate risks and should not replace the recognised dispute process.
Key Takeaways
The main difference between new tenancies and sitting tenants is whether the issue is initial rent setting or a review within an ongoing tenancy. That distinction cannot always be decided from the latest lease alone. The history of the occupation, the reason for any change, the property address and the dates involved may all affect the applicable rules.
For a sitting tenant, check the review timing, calculation and notice requirements. For a new tenancy, ask why the landlord treats it as new, whether an exemption is being claimed and how the proposed rent was determined. In both situations, keep complete records and verify the current position through the RTB, particularly where the Government review of rent pressure zone policy or later legislation may affect the rules.
In summary, confirm the facts before challenging or accepting the rent. The RTB can provide current information and is the standard route for resolving a landlord tenant dispute, while a solicitor can advise on complex or urgent cases. This guide is general information from an independent publication, not a legal determination or a guarantee of the outcome of any particular dispute.