How to Challenge a Rent Increase in Wales

Rent, Deposits & Increases Wales published: June 29, 2025 Flag of Wales

If you're a renter in Wales and receive a notice that your rent will increase, it can feel overwhelming. Yet, you have clear legal rights and ways to dispute a rent amount if you feel it's unfair or unreasonable. This article guides you through the steps to challenge rent increases, the official forms you’ll need, and explains your key protections under Welsh law.

Understanding Rent Increases and Your Rights in Wales

Rent increases are governed by laws specific to Wales. Your landlord must follow proper legal procedures before increasing your rent, and you have the right to challenge a proposed increase if you think it’s excessive or unjustified.

What Notice Must My Landlord Give for a Rent Increase?

  • For occupation contracts starting after 1 December 2022 (including most new tenancies), your landlord must provide a written notice of rent increase, called a RHW12: Notice of Rent Variation form.
  • They must give you at least two months’ notice in writing before the new rent takes effect.
  • Rent can’t be increased more than once in any 12-month period.

These rules are set out under the Renting Homes (Wales) Act 2016[1].

How to Challenge a Rent Increase in Wales

If you believe your rent increase is unfair, you can formally dispute it. You must take action before the new rent is due to start.

  • Review your rent increase notice (form RHW12) for accuracy.
  • Respond within one month of receiving the notice if you wish to challenge it.
  • Apply to the Rent Assessment Committee (RAC) via Rent Assessment Panels for Wales.
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Submitting an Application to Rent Assessment Committee

The official tribunal handling rent disputes in Wales is the Residential Property Tribunal for Wales (specifically, its Rent Assessment Committee).

  • Form to use: Application to Rent Assessment Committee (no specific form number).
  • When to use: Use this form if you dispute the rent set out in the landlord’s RHW12 notice and want an independent decision on a fair rent.
    Example: If your landlord proposes a £75 per month rent increase you believe is higher than similar properties in your area, you can submit this application to have an independent panel review what is a reasonable market rent.
  • How to submit: Follow the instructions on the form and submit it to the Residential Property Tribunal for Wales by post or their online system.

What Happens Next?

Once you’ve made an application, the tribunal will consider the evidence from both sides. They may arrange a hearing and can decide whether:

  • To set the rent at the amount the landlord proposes
  • To set a different rent they consider fair for the property and area

You will pay the current rent until a decision is made, and the tribunal’s decision is legally binding.

If you're unsure about your rights, get impartial advice from organisations like Shelter Cymru or your local council’s housing department.

What to Include in Your Rent Dispute Application

To support your case, provide:

  • Recent tenancy agreements or previous rent notices
  • Examples of similar local rents (online listings or local agents)
  • Details of repairs needed, if the property’s condition is poor

A clear, well-documented application helps the tribunal understand your position and increases your chances of a fair outcome.

FAQ: Challenging Rent Increases in Wales

  1. Can my landlord increase my rent more than once a year?
    No, under the Renting Homes (Wales) Act 2016, rent can only be increased once every 12 months.
  2. What happens if I miss the one-month deadline to challenge a rent increase?
    If you do not apply to the Rent Assessment Committee within one month of receiving the rent increase notice, you may have to accept the new amount or wait 12 months for the next possible increase.
  3. Will challenging my rent affect my tenancy rights?
    No, you are legally protected against retaliation for challenging rent; your landlord cannot evict you for making a fair application to the tribunal.
  4. Can I get support to fill in the forms for a dispute?
    Yes, you can get help from housing advice services such as Shelter Cymru or your local council.
  5. What evidence helps my case before the tribunal?
    Bring recent local rent comparisons, property condition photographs, and any relevant correspondence between you and your landlord.

Key Takeaways

  • Landlords in Wales must give proper written notice and can’t increase rent more than once per year.
  • You have a right to challenge an increase by applying to the Rent Assessment Committee within one month of notice.
  • Always keep copies of all documents, notices, and evidence to strengthen your case.

Challenging a rent increase is your legal right. Acting quickly and seeking advice can make the process less stressful and more successful.

Need Help? Resources for Renters


  1. Renting Homes (Wales) Act 2016
Bob Jones
Bob Jones

Editor & Researcher, Tenant Rights UK

Bob writes and reviews tenant law content for various regions. They’re passionate about housing justice and simplifying legal protections for renters everywhere.