Part of: UK Council Tax 2026 — Complete Guide → Council Tax Appeal 2026 — Challenge Your Band, Bill, or Charge
TL;DR: Comparable evidence is the foundation of a Council Tax band challenge. Strong comparables are properties similar to yours in type, size, and location that are in a lower band. Use the Valuation Office's public band list (gov.uk/council-tax-bands) to find them. Aim for three to five strong comparables, all with documented similarity to your property. Properties in different localities, of different types, or significantly different in size are weak comparables.
Last reviewed: 27 April 2026
What "Comparable Evidence" Means
The Council Tax banding system in England assigns bands based on each property's hypothetical open market capital value at 1 April 1991. When challenging a band, the key question is: what would this property have been worth in April 1991, and is that value correctly reflected by the assigned band?
Comparable evidence addresses this by identifying other properties that were valued in 1991 and were assigned to a specific band - properties whose assessed 1991 value anchors the local "tone of the list" (the pattern of band assignments in the area). If similar properties nearby are consistently in a lower band, this suggests your property's 1991 value may have been over-estimated.
The Council Tax (Situation and Valuation of Dwellings) Regulations 1992 and the Council Tax (Alteration of Lists and Appeals) (England) Regulations 2009 together establish the framework within which comparable evidence is assessed.
How to Find Comparable Properties
Step 1 - Use the Valuation Office public band list:
Go to gov.uk/council-tax-bands and enter your postcode. The tool shows every residential property in the area and its current Council Tax band. This is free, publicly accessible, and continuously updated.
Start with your own street. Look at properties of similar type and approximate size. Note which bands they are in. If several similar properties are in a lower band than yours, these are potential comparables.
Step 2 - Expand the search to nearby streets:
Council Tax bands are locally calibrated. Properties in the same postcode area and local neighbourhood typically show the most directly relevant comparison. Properties 2 miles away in a different sub-market may have been assessed differently.
Look at streets that are genuinely similar in character to yours - similar housing stock age, similar general amenity, similar distance from local facilities.
Step 3 - Check Land Registry sale prices:
At gov.uk/search-house-prices, you can see actual sale prices for properties. Historical sales from the early 1990s (if available) provide direct evidence of relative 1991 values. More recent sales can support the argument that the relative value differential has persisted.
Step 4 - Note any differences and explain them:
For each comparable property, document why it is similar to yours: same property type, approximate floor area, number of bedrooms, general condition, and similar location. Acknowledge any differences (if one comparable is slightly smaller, note this and explain why it is still relevant).
The Physical Comparables Test
The Valuation Office assesses comparables against specific physical characteristics. The strongest comparables share:
Same property type: Terraced, semi-detached, detached, end-terrace, flat, maisonette. Mixing types is a weakness - a terraced house is not directly comparable to a semi-detached on the same street because they would typically have had different 1991 values.
Similar floor area: Within approximately 10 to 15% of your property's gross internal area. Significant size differences undermine comparability even if the properties look similar from outside.
Similar number of bedrooms: As a proxy for size and layout, bedroom count matters. A 4-bedroom comparable versus your 3-bedroom property requires explanation.
Same general locality: Ideally the same street. The same postcode or an immediately adjacent street is a reasonable outer limit. Different neighbourhoods, even nearby ones, may have had genuinely different 1991 values.
Similar condition at 1991: A property that was significantly renovated between 1991 and now may have had a different 1991 value from its current appearance suggests. Properties in similar original condition are stronger comparables.
How Many Comparables Do You Need?
Well-researched proposals typically cite three to five strong comparables. The Valuation Office needs enough comparables to identify a pattern, but they look for quality over quantity.
A proposal with three excellent comparables (same street, same type, same approximate size, all in a lower band) is stronger than a proposal with ten weak or borderline comparables.
How to Present Comparables in Your Proposal
For each comparable property, include in your proposal:
- Full address
- Current Council Tax band
- Property type
- Approximate size or number of bedrooms (where known)
- Your assessment of why it is comparable to your property
- The specific similarity that makes it relevant
The Valuation Office can verify the bands from its own records and check the comparable properties' recorded characteristics. Your role is to identify the comparables and make the case for their relevance.
Organising Your Comparables for Submission
When you submit your proposal to the Valuation Office, present your comparables clearly and systematically. A well-organised comparable section helps the reviewing officer assess your case efficiently.
Recommended format for each comparable:
1. Full address of comparable property
2. Current Council Tax band (from gov.uk/council-tax-bands)
3. Property type (terraced/semi/detached/flat)
4. Approximate size or number of bedrooms (from EPC or estate agent records)
5. Why it is comparable to your property (same type, similar size, same street or immediate area)
6. Any differences and why they do not undermine the comparison
Summary statement: After listing comparables, include a one-paragraph summary explaining what the combined evidence shows - that the prevailing band assignment for properties similar to yours in the area is [lower band], and that your property's assignment to [higher band] is inconsistent with this local pattern.
What Not to Use as Comparables
Properties in different localities: Nearby but genuinely different sub-markets (for example, a riverside area versus an inland area in the same postcode) may have had different 1991 values.
Properties of different types: Comparing your terraced house to a flat or detached house requires substantial justification.
Properties substantially modified since 1991: A property that has had a large extension since 1991 would have had a different (lower) 1991 value. It is not directly comparable to your property in its current form.
Commercial properties: Business premises are not Council Tax properties and cannot be used as comparables.
Properties in Wales or Scotland: Different valuation dates and band structures make cross-border comparisons invalid for English appeals.
Using Land Registry Data as Supporting Evidence
Land Registry sold price data provides "fact of sale" evidence - actual transaction prices for specific properties at specific dates. This data is publicly available at gov.uk/search-house-prices and can support a comparable evidence case in several ways:
Historical 1991-era sales: Properties sold close to April 1991 provide the most direct evidence of relative value at the banding date. If a comparable property sold for significantly less than yours in 1991, this supports an argument that their relative band position should differ.
Post-1991 relative value trends: Even more recent sale prices provide context for relative value patterns. If similar properties on your street consistently sell for less than yours (suggesting a lower relative value), this supports the comparable argument.
How to use Land Registry data in your proposal: Reference specific sales with addresses and prices. Explain how the relative price evidence supports the contention that your 1991 hypothetical value would have been lower than the current band implies.
Limitations: Land Registry data goes back to 1995 in most cases - not to 1991 itself. Properties sold in 1995-1997 provide a reasonable proxy for relative values in April 1991, as the market in that period had not diverged dramatically from 1991 conditions.
The Role of EPC Data in Comparable Evidence
An Energy Performance Certificate (EPC) provides verified data on a property's floor area, construction type, and energy features. EPCs are publicly searchable at the government's EPC register (epcregister.com or find-energy-certificate.service.gov.uk).
For comparable evidence purposes:
Floor area verification: The EPC's floor area measurement (gross internal area) provides a consistent basis for comparing property sizes. This helps establish that a comparable is genuinely similar in size to your property.
Construction type: EPCs record whether the property is brick, stone, cavity wall, solid wall, and similar features - all relevant to 1991 hypothetical value.
Using EPC data: When citing a comparable, include its EPC-verified floor area alongside its Council Tax band. This demonstrates that the comparable is genuinely similar in size.
Limitation: EPCs were only introduced from 2008. Properties that have never been marketed since 2008 may not have an EPC. For pre-2008 comparables, rely on estate agent descriptions and Land Registry records.
Aerial Photography and Historical Maps
Google Maps and aerial views help verify that a comparable property is genuinely similar in footprint to yours. An aerial view shows the building's outline and relative size, which complements the comparable selection.
Historical Ordnance Survey maps (available through the National Library of Scotland's map portal and other sources) can show properties in their 1991-era configuration - useful for checking whether a comparable had been extended since banding or whether your property was smaller in 1991 than now.
The Post-Merger Comparable Evidence Standard
The Valuation Office (formerly VOA, now part of HMRC since 1 April 2026) applies the same comparable evidence standard as before the merger. HMRC has confirmed that the Council Tax (Alteration of Lists and Appeals) (England) Regulations 2009 and the comparable methodology continue unchanged.
The evidence you prepare for a proposal in 2026 is assessed on the same criteria as pre-merger proposals.
Frequently Asked Questions
I found 10 properties on my street in a lower band than mine - is this enough?
Ten properties in a lower band is strong contextual evidence of a local pattern. However, the Valuation Office will want to see whether those properties are genuinely comparable (same type, similar size). Select the three to five most directly similar and present those as your primary comparables, noting the wider pattern as supporting context.
The Valuation Office says my comparable is not valid because of its layout differences - what can I do?
Ask the Valuation Office to explain specifically what layout differences they believe affect comparability. If the differences are minor (for example, slightly different room arrangements in otherwise similar sized properties), you can make the argument that these would not have materially affected 1991 values.
Can I use Rightmove or Zoopla listings as comparable evidence?
Current Rightmove and Zoopla listings are most relevant for verifying current property characteristics (to check that the comparable is genuinely similar in size and type). They are less direct as evidence of 1991 values. Land Registry historical sales data is more relevant as value evidence.
How does the Valuation Office's own "tone of the list" affect my comparables?
The "tone of the list" refers to the prevailing pattern of band assignments in an area, reflecting how the original 1991 valuations were applied. Strong comparables that are directly on your street and reflect the local tone are the most persuasive because they show your property was assessed differently from its immediate neighbours despite being similar.
What if all properties on my street are in the same band as mine - does that mean my band is correct?
Not necessarily. If the entire street is in the same band, comparable evidence from the immediate street alone cannot support a reduction. You would need to look at neighbouring streets with similar properties in lower bands, or identify factual or historical errors in the Valuation Office's assessment.
How we verified this
The comparable evidence framework is from the Council Tax (Situation and Valuation of Dwellings) Regulations 1992 and the Council Tax (Alteration of Lists and Appeals) (England) Regulations 2009. The Valuation Office's comparable assessment approach is from published Valuation Office guidance. Land Registry data is from HM Land Registry. The "tone of the list" methodology is from established Valuation Tribunal England jurisprudence. MHCLG guidance covers comparable selection for band proposals.
Sources & Verification
- Council Tax (Alteration of Lists and Appeals) (England) Regulations 2009: https://www.legislation.gov.uk/uksi/2009/2270/contents
- Council Tax (Situation and Valuation of Dwellings) Regulations 1992: https://www.legislation.gov.uk/uksi/1992/550/contents
- Local Government Finance Act 1992: https://www.legislation.gov.uk/ukpga/1992/14/contents
- gov.uk Council Tax band lookup: https://www.gov.uk/council-tax-bands
- HM Land Registry sold prices: https://www.gov.uk/search-house-prices
- Valuation Office (formerly VOA): https://www.gov.uk/government/organisations/valuation-office-agency
- IRRV (Institute of Revenues, Rating and Valuation): https://www.irrv.net/
This article is for informational purposes only and does not constitute legal, financial, or tax advice. Council Tax rules vary by local authority and change annually. Always verify current rates and rules with your local council and gov.uk before making any decision.
