Rent-Tribunal Evidence: How to Assemble Comparables That Hold Up

Why Comparables Matter More Than Anything Else

A rent-tribunal application is a valuation exercise, not a legal argument. The tribunal's job under Section 14 of the Housing Act 1988 is to decide what the property would let for on the open market under an assured tenancy with the same rent periods and, apart from the rent, the same terms as the existing one (s.14(1)). There is no fairness test, no consideration of the tenant's ability to pay, no rent-control formula. The question is: what is the market rent?

The tribunal answers that question largely by comparison: what other tenants are agreeing to pay for properties similar enough to be meaningful.

For both sides of a Form 4A dispute, the practical answer is the same: the more closely your comparables match the subject property, the more weight they will carry.

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What Counts as a Comparable

A useful comparable shares the following with the subject property:

• Type — flat, terraced house, semi-detached, purpose-built, conversion
• Number of bedrooms — and ideally number of reception rooms and bathrooms
• Location — same postcode if possible, certainly the same neighbourhood, close to similar transport links, schools and amenities
• Condition — broadly equivalent state of repair and decoration
• Furnishings — furnished, part-furnished, or unfurnished (these are not interchangeable for rent purposes)
• Specification — kitchen and bathroom standard, white goods, central heating, double glazing, EPC rating
• External features — garden, parking, balcony, communal facilities

A two-bedroom Victorian conversion flat in zone 3 with a small garden and on-street parking is not comparable to a two-bedroom new-build flat in zone 2 with a roof terrace and a residents' gym. Both might be valid evidence, but the tribunal will discount for the differences.

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Asking Rents vs Agreed Rents

The single most important quality distinction in comparable evidence is between asking rents (what landlords are advertising for) and agreed rents (what tenancies have actually concluded at).

Asking rents are easy to find. Rightmove, Zoopla and OpenRent list thousands of available properties at any time. But asking rents are also aspirational — landlords advertise at a figure they hope to achieve, and the achieved figure is often lower.

Agreed rents are harder to find but carry more weight — GOV.UK says evidence from actual agreed lettings is stronger. A property listed at £2,000 per month and let at £1,850 is better evidence of the market at £1,850 than the £2,000 asking figure.

Sources for agreed rents include:

• Letting agents. Some will provide written evidence of recent agreed lettings, especially if instructed by one of the parties.
• Local landlords' associations, some of which may keep market data.
• Published Property Chamber decisions on GOV.UK ('Residential property tribunal decisions'), which include market-rent cases.
• The Office for National Statistics' Price Index of Private Rents — a useful contextual figure, but not specific to a property.

For a Form 4A challenge, a well-chosen schedule of closely comparable lettings, including agreed rents where you can get them, is more persuasive than a long list of loosely similar listings.

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What Each Side Should Do

The Landlord

If you are serving Form 4A:

• Pick the rent figure against comparable evidence before serving. A landlord who lets an agent pick a number, signs the form, and then has to defend the figure at tribunal is starting from the back foot.
• Keep the comparable evidence with your copy of the form. If the tenant applies to the tribunal, you will need it by the date set in the tribunal's directions.
• Get a letting agent's letter. Many agents will write a short letter setting out the achievable rent for the property with reasons; it can be put forward as evidence.
• Acknowledge the property's weaknesses. A tribunal that thinks you are presenting an overly favourable picture will discount your evidence. Be honest about condition issues, dated specification, or external factors (noisy main road, unloved building exterior).

The Tenant

If you are challenging a Form 4A:

• Search Rightmove, Zoopla and OpenRent. Set the parameters to match your property — same number of bedrooms, same broad area, same furnishing status. Print or screenshot the closest matches. Note the asking rents and the dates.
• Look for agreed lettings. 'Let agreed' listings appear from time to time, and some agents publish recent agreed figures on their websites.
• Photograph your property's weaknesses. Disrepair, dated kitchens, mould, poor heating — anything that argues for a lower-than-headline rent.
• Photograph the comparables' strengths. If the comparables in your evidence pack have newer kitchens, better gardens, or more parking, the tribunal can see why their rents might be higher than yours.
• Build a one-page schedule. Address, type, bedrooms, condition, asking rent, source, date. The tribunal does not want to leaf through 30 raw printouts; they want a structured schedule with the documents attached.

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Who Decides

Property Chamber panels usually have two or three members, who may include a surveyor as well as a legally qualified member (GOV.UK tribunal guidance T541). The tribunal decides the rent on the evidence both sides send, and it may also look at the property online or inspect it (GOV.UK, 'Apply for an open market rent determination'; rule 21, SI 2013/1169).

For both sides, the practical lesson is: do not overstate your case. Present an honest case backed by good evidence.

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The Condition Factor

Condition is one of the biggest single drivers of rent value, and it is often the area where tenant evidence is strongest.

A property with serious disrepair has a lower market rent than one in good condition. A property with mould, faulty heating, leaking pipes, or unsafe wiring has a lower market rent still.

For the tenant in a Form 4A challenge, this means condition photographs are powerful evidence. Dated photographs (with the date visible in the image), videos walking through the property, and any independent reports (Environmental Health, surveyor, a council environmental health (HHSRS) inspection) all count.

The Decent Homes Standard does not yet apply to private rented homes: the Government's policy statement of 28 January 2026 says the new standard will apply from 2035. Condition still matters now, because the tribunal can take the property's actual condition into account (Form 4A (05.26), section 5.2). See our separate piece on disrepair as a rent-tribunal factor.

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Specification and Extras

Subtler than condition, but still influential, is specification. Two flats can both be "in good condition" but command quite different rents based on:

• Kitchen — a modern, fitted, well-equipped kitchen adds rent value; a 1990s laminate kitchen with a freestanding cooker does not
• Bathroom — same logic; a power shower over a separate bath is a feature, a single shower-bath over a discoloured bath is not
• Heating — full gas central heating is standard; electric storage heaters or no heating at all is a material discount
• Insulation and EPC — a better energy rating can support a higher rent than the same property with a poor rating
• White goods — dishwasher, washing machine, dryer, fridge-freezer all included is a feature; bring-your-own is not
• Furniture — furnished, part-furnished, or unfurnished are three different price points

For tenants, the trick is to compare like-for-like. A furnished comparable cannot fairly set the rent for an unfurnished subject property. For landlords, similarly, do not put forward unfurnished comparables for a furnished property without adjustment.

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A Working Comparable Schedule

The format that works best at tribunal is a simple one-page table with documents attached. Something like:

Attach the original listings, the agent letter, and a one-page note explaining how each comparable maps to the subject property. That is the evidence pack the tribunal will read first.

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Common Mistakes to Avoid

• Cherry-picking. Both sides do this. The tribunal may notice. If your evidence pack has six comparables all clustering tightly around the figure that suits you, the tribunal may suspect you have screened out the inconvenient ones.
• Using bedrooms-plus-postcode as your only filter. A three-bed flat over a takeaway with a single bathroom is not comparable to a three-bed flat in a quiet residential cul-de-sac with two bathrooms, even if both are SW15.
• Mixing furnishing status. Furnished and unfurnished are different markets. Mixing them muddles the evidence.
• Stale evidence. Older lettings carry less weight as the market moves. Use the most recent evidence you can find.
• Ignoring condition. A pristine new-build is not a fair comparable for a tired Victorian conversion. The tribunal expects you to account for the difference.
• No supporting note. Raw printouts without a schedule and explanation leave the panel to do the work. They will, but they will not necessarily reach the conclusion you want.

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What the Tribunal Will Do With the Evidence

The panel will read both sides' submissions, look at the photographs and the comparable schedules, and (sometimes) inspect the subject property. They will then deliberate.

The tribunal's decision will usually explain the evidence it relied on and how it reached its figure. A party who disagrees can appeal to the Upper Tribunal (Lands Chamber) only on a point of law and only with permission (Tribunals, Courts and Enforcement Act 2007 s.11). The application for permission goes first to the First-tier Tribunal and must be received within 28 days after it sends its written reasons (rule 52, SI 2013/1169).

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The Bundle for Tribunal

The tribunal application bundle should contain:

• The Form 4A as served
• The tenancy agreement
• A schedule of comparables with the original listings attached
• Photographs of the subject property (dated)
• A photograph schedule keyed to property features
• Any condition or specification reports
• The tenant's brief witness statement (or the landlord's, depending on side)
• Any letting-agent letters supporting the figure

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BundleCreator's tenancy-variation area at /tenancy-variation helps you organise the Form 4A as served, your comparable schedule, photographs and witness statements into an indexed bundle for the First-tier Tribunal (Property Chamber). The notice and the application must be on the official forms from GOV.UK.

Nothing in this article is legal advice or a substitute for it. The information here describes the law as it stands at the date shown; the law and procedure may change. For independent advice at no cost, contact Citizens Advice, Shelter England, your local Law Centre, or the Housing Loss Prevention Advice Service (which is available without charge to any tenant served a Section 8 notice). The Tribunal Procedure (First-tier Tribunal) (Property Chamber) Rules 2013 (as amended) apply to rent-determination applications.