TL;DR
An estate-agent listing is an advertisement written by someone the seller is paying. It is legally constrained — under the Consumer Protection from Unfair Trading Regulations, agents can't actively lie about material facts — but the incentive is to present the home at its best, and a great deal that matters is simply left out. Omission is not the agent's failure; it's the format.
The good news is that almost everything the listing skips is recorded in an official, public dataset you can check yourself, mostly for free. Here are the 12 most consequential gaps and where to fill them.
You can pull most of these for one address in our £14.95 one-off property report (a single payment, no subscription) at /pricing, or browse the free area view for any postcode. But every source below is named so you can verify it yourself.
1. The property is in a flood zone
Listings almost never mention flood risk, and there's no requirement to. Yet flooding affects insurability, mortgageability, and resale — and climate change is widening the at-risk areas.
Where to check: the Environment Agency publishes the official flood maps for England (rivers, sea and surface water), with separate equivalents from Natural Resources Wales, SEPA in Scotland and DfI Rivers in Northern Ireland. Look for both flood zone (the planning designation) and surface-water (pluvial) risk, which catches a lot of properties that aren't near a river.
2. What's been approved — or refused — next door
The listing shows you the view today. It won't show you the approved three-storey extension on the neighbouring plot, the change-of-use application turning the corner pub into flats, or the refused (and likely-to-return) development at the end of the road.
Where to check: planning.data.gov.uk aggregates planning data nationally, and every local planning authority runs a public planning portal you can search by address or map. Read the refusals, because a refused application often comes back in amended form. Conservation-area and Article 4 designations also show up here.
3. The local crime pattern
No listing has ever described the antisocial-behaviour hotspot two streets over. Crime is intensely local and the headline "it's a nice area" tells you nothing useful.
Where to check: Police.uk publishes street-level crime and antisocial-behaviour data for England, Wales and Northern Ireland, updated monthly. Read the trend, not a single month, and remember that high reported crime can partly reflect high reporting, and that locations are snapped to anonymised points. Our area reports chart this over time.
4. A genuinely poor EPC rating
The listing must legally include the EPC rating, but a "C" in a small box doesn't convey what a draughty, expensive-to-heat home actually costs to run — and an "E", "F" or "G" can carry real financial and regulatory consequences.
Where to check: the EPC Register, run by MHCLG, holds the full certificate, including the recommended improvements and the indicative running costs. Coverage note: the EPC Register is England and Wales; Scotland has its own register.
5. A short or problem lease
"Leasehold" in a listing can hide a lot. A lease with fewer than ~80 years left is expensive to extend, can be hard to mortgage, and is a serious negotiating point. Ground rent escalation clauses and onerous service charges are rarely spelled out either.
Where to check: the HM Land Registry title register (the leasehold title) shows the lease term and start date. For ground rent and service-charge specifics you'll need the lease itself via your conveyancer, but the title is the fast first check.
6. Japanese knotweed risk
No seller volunteers "there's knotweed". They're required to answer honestly on the TA6 property information form during conveyancing — but that's after you've already invested in the purchase. Knotweed can affect mortgageability and costs thousands to treat.
Where to check: there's no single national knotweed register, so this is a desk-and-eyes job. The Environment Agency treats knotweed as controlled waste and provides guidance; some regional and citizen-science maps record sightings. Combine a careful look at the garden in summer with the TA6 form, and treat a "don't know" answer as a flag.
7. A council tax band that's about to jump
The listing might state the current council tax band. What it won't tell you is that an extension can trigger a revaluation when the property next sells, or that the current band looks anomalously low compared with near-identical neighbours.
Where to check: the Valuation Office Agency (VOA) publishes the council tax band for every property in England and Wales, searchable by address. Bands are still based on 1991 values in England and 2003 in Wales.
8. A road-safety blackspot outside
A pleasant photo of the front elevation won't show you that the junction at the end of the road has a cluster of recorded collisions, or that the "quiet residential street" is a rat-run.
Where to check: the Department for Transport's STATS19 dataset records every personal-injury road collision reported to police in Great Britain, with location, severity and conditions.
9. Conservation-area and listed-building restrictions
A period-feature listing rarely mentions that you'll need consent to replace the windows, that permitted-development rights have been stripped by an Article 4 direction, or that the building is listed.
Where to check: Historic England maintains the National Heritage List for England; Cadw (Wales), Historic Environment Scotland and the relevant NI body cover the other nations. Conservation-area boundaries and Article 4 directions sit with the local planning authority and on planning.data.gov.uk.
10. Radon exposure
Radon — a naturally occurring radioactive gas — is invisible, odourless, and never mentioned in a listing. In certain geologies it accumulates in homes at levels worth mitigating.
Where to check: UKHSA and the British Geological Survey publish the indicative radon-affected-areas map at ukradon.org. The map tells you the probability that a property is above the action level; an actual measurement requires a cheap home test kit. Our area reports flag radon risk from this dataset.
11. A broadband notspot
The listing might say "superfast broadband available" — or say nothing, which can be worse. For anyone working from home, the difference between a fibre street and a copper notspot is material.
Where to check: Ofcom's Connected Nations report aggregates real coverage data from ISPs at the postcode level. Don't take the agent's word; check the address against Ofcom's data. Our area view includes the Ofcom broadband picture for a postcode.
12. The real recent sale-price history
The asking price is an aspiration. What the listing won't put in the description is that the seller bought it eighteen months ago for considerably less, or that the street's last three sales all went for under what's being asked now.
Where to check: HM Land Registry Price Paid is the complete public record of residential sales in England and Wales, going back to 1995. Our property reports pull this automatically, and the area view shows comparable sales around a postcode. Coverage note: Price Paid is England and Wales; Scotland's equivalent is Registers of Scotland.
The pattern: the listing is marketing, the data is the truth
Every gap above is filled by an official public dataset: HM Land Registry, the Environment Agency, Police.uk, the EPC Register, the VOA, DfT STATS19, Historic England, Ofcom, UKHSA, planning.data.gov.uk. The information asymmetry between buyer and seller is real, but it's closeable, and most of it is free. The ONS Census 2021 and the English Indices of Multiple Deprivation (IMD 2025) add the socioeconomic backdrop a listing will never mention.
Honest caveats
Bottom line: the listing is the seller's story. The twelve datasets above are the public record. Before you offer, spend the time (or the £14.95) to read both.