OnTheMarket 2026: Free, Agent-Led, and What It Doesn't Check at the Address

What OnTheMarket is genuinely better at

OnTheMarket is free, it is the third of the UK's major portals, and it is not a weaker copy of the other two. Two of its features are the best implementations of their idea anywhere in UK property search.

• Travel Time Search. Almost every property search filters by distance, which is close to useless in a country where three miles can be eight minutes or forty. Filtering by actual journey time to a place you need to reach — a station, an office, a school — matches how people really choose where to live.
• The Keywords filter. The things that decide a purchase are frequently buried in listing prose rather than in structured fields: an annexe, a south-facing garden, off-street parking, a garage with power. Searching the text for them turns a shortlist of forty into a shortlist of six.

It also runs a free Rent checker, and a sold-prices tool it calls "the simple, free way to check sold property prices paid in the UK", drawn from "the Land Registry and the Registers of Scotland" — the same official registers everyone else uses.

The valuation: what it actually is

OnTheMarket offers an instant online valuation that promises an estimate of your home's value in under three minutes, free, and then puts you in touch with local OnTheMarket agents. To its credit, it labels the output honestly: the figure is "indicative based on the information you provide".

That sentence does a lot of work and is worth reading twice. The estimate is a function of the answers you type in, combined with area data. It is not an inspection, not a survey, and not an independent assessment of your particular house. It is also, transparently, the front door to an agent introduction — which is a perfectly reasonable business model for a free tool, and better disclosed here than in much of the category.

The practical guidance is simple: use it to get a rough bearing and to reach a local agent. Do not carry the number into a negotiation as though a third party produced it. HouseCheckup takes the opposite approach and publishes no automated estimate at all — we put HM Land Registry sold-price comparables in front of a person, which is slower, narrower and harder to over-read.

The gap: nothing about the ground the house sits on

Searching OnTheMarket's consumer surfaces on 28 July 2026, we found no address-level environmental or ground-risk layer. No flood indicator of the kind Zoopla introduced in January 2025. No coalfield or mining flag. No radon class. No ground-stability or subsidence rating.

That is not a criticism of the product's design. OnTheMarket is a search-and-agent business and it does that well. But it has a consequence for how you buy: if OnTheMarket is your primary portal, no environmental screening of the property happens at any point before your solicitor orders formal searches — which is after your offer has been accepted, after you have instructed a solicitor, and after you have started spending.

Which checks that leaves open, and what we run

Two of those rows go decisively to OnTheMarket, and one of them — listings — is the row that gets you to a property in the first place. The screens matter only once you have chosen one.

Why those four screens are the ones worth paying for

Flood, mining, radon and ground stability share a property that makes them worth checking early: each can affect what a house is worth, whether it is straightforward to insure, or whether a lender takes a different view — and none of them is visible at a viewing. You cannot see a shrink-swell clay soil from the pavement, or old workings under the garden, or a surface-water flow path on a dry day in July.

They are also the checks a solicitor's environmental search covers, several hundred pounds and several weeks later. Running them before you offer does not replace that search. It changes what you offer, or whether you offer, on evidence you would otherwise buy far too late.

One precision point, because it matters more than a sales line: we run each screen at the address and report what comes back. Some datasets do not return a reading for every property. Where that happens the report says so plainly, in words, rather than presenting silence as an all-clear. A stated blank is more useful to you than a confident invention.

Where we are narrower than OnTheMarket

• Coverage. OnTheMarket lists UK-wide. We cover England and Wales only.
• Price. It is free. We charge £9.99 or £24.99, once, with no subscription.
• Search. No listings, no Travel Time Search, no Keywords filter, no Rent checker. Those are genuinely good and we do not replicate them.
• Speed. OnTheMarket answers immediately. Our report is checked by a person and emailed within 24 hours, usually faster.
• Not a survey, not a formal search. Neither product replaces your surveyor or your solicitor.

The order that costs least

The third row exists to protect the fourth. Search fees, survey fees and solicitor time spent on a property that an address-level screen would have flagged in the first week are the most avoidable costs in the entire process, and they are incurred by buyers who did everything else right.

How the three portals compare on risk

For completeness, since buyers usually have all three tabs open: Zoopla leads on buyer-facing risk, showing crime, nearby planning counts and flooding from rivers and seas to signed-in users. Rightmove names sixteen risk fields in its Material Information block but, on the listing we examined, deferred every one of them to the legal pack — while separately selling flood and subsidence alerts to lenders and surveyors. OnTheMarket carries no address-level risk layer we could find. The common thread is that none of the three screens surface-water flood, coal mining, radon or ground stability at your address. See also Rightmove vs Zoopla and our wider comparison of UK property reports.

Key takeaways

• OnTheMarket is free and genuinely useful — Travel Time Search and the Keywords filter beat the equivalents on the bigger portals.
• Its valuation is honestly labelled as indicative, based on the information you provide, delivered in under three minutes and routed to local agents. Treat it as an agent introduction, not an independent valuation.
• Sold prices come from the Land Registry and the Registers of Scotland, free, with the registration lag every service inherits.
• No address-level environmental or ground-risk layer was observed — no flood, coalfield, radon or ground-stability indicator.
• HouseCheckup runs those four screens at the address, plus planning designations, EPC, crime, schools and comparables — 15+ checks, hand-checked and emailed within 24 hours, usually faster, one-off £9.99 or £24.99, England and Wales only.