First-tier Tribunal Rent Challenge Guide 2026 — When Tenants Challenge Section 13 Rent Increases

Section 13 rent increases and the First-tier Tribunal — the legal framework

Under the Renters' Rights Act 2025, all private residential tenancies in England are Periodic Assured Tenancies. The only lawful method of raising the rent on a PAT is by service of a formal Section 13 notice on Form 4A (the Renters' Rights Act version of the old Form 4 notice). The notice must give at least 2 months' advance notice and the increase can take effect no more than once per 12-month period.

When a landlord serves a valid Form 4A notice, the tenant has the right to refer the proposed increase to the First-tier Tribunal (Property Chamber) for a determination. The tenant must make the application before the effective date of the proposed increase. If a valid application is made, the proposed increase is suspended until the tribunal issues its determination.

The tenant's right to apply — key rules

• Deadline: The tenant must apply to the tribunal before the effective date stated in the Form 4A notice. There is no statutory extension of time — a late application will be refused
• One challenge per Section 13 notice: Each Form 4A notice can be challenged once. A new Section 13 notice issued in a subsequent 12-month period can be challenged afresh
• Suspension of the increase: Once a valid application is received by the tribunal, the proposed new rent is suspended. The old (pre-notice) rent continues to be the rent until the tribunal's determination is issued
• No requirement for grounds: The tenant does not need to provide reasons for the challenge — the right to refer is unconditional

What the tribunal determines — market rent assessment

The tribunal must determine the 'market rent' — the rent at which the tenancy of the dwelling, or a similar dwelling at the same location, might reasonably be expected to be let in the open market by a willing landlord, disregarding any effect attributable to the existence of the tenancy and any improvements made by the tenant.

In practice, the tribunal will consider:

• Comparable lettings: Evidence of actual let prices for similar properties in the same postcode or immediate area. This is the primary evidence relied upon by the tribunal
• Property condition: The tribunal can adjust the comparables to reflect the condition, size, and features of the specific property
• Improvements by the tenant: Any improvements made by the tenant at their own expense are disregarded — the tribunal assesses the property as if the tenant's improvements had not been made
• Date of determination: Market rent is assessed as at the date the tribunal makes its determination, not the date the Form 4A notice was served — if there has been market movement between the two dates, this will be reflected

How landlords should prepare for a tribunal hearing

Preparation is the key to a successful tribunal. Landlords who present well-evidenced cases are far more likely to see the proposed rent confirmed or a higher figure set.

1. Gather comparable let evidence: Use Rightmove, Zoopla, OnTheMarket, or a local letting agent to identify 3–5 comparable properties let in the previous 3 months within 0.5 miles of your property. Record the address, size, condition, features, and achieved rent for each comparable
2. Prepare a property description: Document the property's size (total floor area in m², individual room measurements), condition (recently refurbished vs standard), features (garden, parking, modern kitchen/bathroom, white goods), and location advantages (proximity to transport, schools)
3. Commission a market rent assessment if in doubt: A RICS-qualified surveyor or a reputable local letting agent can provide a written market rent assessment. The fee (typically £100–£300) may be recoverable as a business expense and provides independent corroboration
4. Respond to the tribunal application promptly: The tribunal will send the landlord a notice of hearing and may ask for written submissions. Respond by the deadline provided. Late submissions risk being excluded
5. Attend the hearing or send a representative: The tribunal is informal and designed to be accessible. You can attend in person, send an agent, or submit a written case if the hearing is conducted on the papers. Personal attendance is strongly recommended where the case is contested

Evidence that weakens the landlord's case

• Serving a Form 4A with a proposed rent significantly above current comparable market rents without supporting evidence
• A property in poor repair or condition relative to comparables used in evidence
• Comparable evidence that is more than 6 months old, from a materially different location, or of clearly different quality
• Failure to respond to the tribunal's directions or to attend the hearing
• A poorly presented or inconsistent case — clarity and preparation are the landlord's most important tools

Outcomes — what the tribunal can decide

After the tribunal — effect of the determination

The tribunal's determination is binding on both landlord and tenant. The new rent takes effect from a date specified by the tribunal — typically the effective date in the original Form 4A notice, or a later date if the tribunal sets one. Once the determination is made, the landlord cannot serve another Section 13 notice increasing the rent for at least 52 weeks from the determination date.

Sources

• Housing Act 1988 s.13 — Increases of rent under assured periodic tenancies (legislation.gov.uk)
• Renters' Rights Act 2025 (legislation.gov.uk)
• gov.uk: Assured tenancy forms from 1 May 2026 — Form 4A download

This guide is accurate as at 31 May 2026. It is provided for information purposes only and does not constitute legal advice.