Cotality has joined the Open Property Data Association (OPDA), the organisation says, bringing with it a database of over 150 million property records and a claim to support nearly all UK property valuation instructions. The company’s entry into the OPDA adds weight to a push for open, interoperable data standards across the home buying and selling process, though how much that standardisation changes day-to-day transactions for buyers and sellers remains to be demonstrated.
What Cotality joins Open Property Data Association with
The scale of what Cotality brings to the table is not modest, at least on paper. The company says it holds more than 25 years of historical transactional data, monitors around 30.9 million UK residential properties daily for events affecting value and risk, and draws on more than 100 sources of data. Its analytics, AI, and workflow tools are said to serve estate agents, lenders, surveyors, and conveyancers across the transaction chain.
Mark Blackwell, chief operating officer at Cotality, said the company’s integrated platforms, including its Lender Hub, are ‘already helping lenders and surveyors connect digitally, removing friction across the transaction chain.’ He described joining the association as ‘a natural stepping stone, sharing our experience to help shape the framework needed to make home buying and selling faster, more reliable, and transparent for everyone.’
Those are credible-sounding claims, and Cotality’s scale in the UK property data market is not in dispute. What the membership itself adds, beyond association with a body whose standards are still being built out, is a question the announcement does not fully answer.
The OPDA’s position and what it is building
The OPDA describes itself as the UK’s independent and not-for-profit industry body for companies working to transform the property industry through data collaboration. Since its launch, it has developed open property data standards and models designed to create trusted, reusable, and shareable property information, built, it says, collaboratively across the industry to reduce friction and improve transparency.
The association has also forged relationships across the wider smart data ecosystem. According to its own published materials, OPDA holds membership of the Smart Data Council and the Digital Property Market Steering Group, positioning it as a participant in policy-level conversations, not just a trade body producing standards documents. That context matters: property data reform in the UK is increasingly tied to government smart data initiatives, and an organisation with seats at those tables carries more influence over what any eventual framework looks like.
Maria Harris, chair of the OPDA, said the association was ‘delighted’ to welcome Cotality, describing the company as bringing ‘deep technical expertise and proven integration across lenders and valuation networks.’ She added that Cotality’s involvement would be ‘invaluable’ as the OPDA continues to build ‘open, trusted standards to create a faster, more connected home buying and selling process.’
The OPDA’s membership already includes major high street banks, building societies, conveyancers, estate agents, and technology providers. Cotality joins that expanding network.
What the membership does and does not establish
Joining an industry body is a statement of intent, not a product launch. Cotality’s announcement frames membership as consistent with its ‘strategic roadmap to deliver frictionless, interoperable data sharing,’ and as ‘an important stepping stone toward broader industry standardisation.’ That language is careful, and appropriately so: standards take time, adoption is uneven, and the gap between a well-connected membership network and measurable reductions in transaction delays is real.
What the announcement does establish is that Cotality’s existing infrastructure, its integrated lender hub, its valuation and surveying software, its monitoring of residential properties at scale, is now formally aligned with the OPDA’s standards-building effort. Whether the company’s involvement accelerates that effort, or simply adds a large incumbent’s imprimatur to work already underway, will show in the detail of what is built next.
The OPDA is an industry partner of Open Banking Expo UK & Europe 2026, taking place on 13-14 October at the Business Design Centre in London. Cotality‘s membership was announced ahead of that event.
