Duplicate Images Online Are Costing Londoners Money and Erasing Local History — Here's Why It Matters

Thousands of London properties are listed online with duplicate or mismatched photographs — the same stock image of a kitchen splashed across dozens of separate addresses, or a photograph of a Peckham terraced house attached to a listing in Walthamstow. It sounds trivial. It is not. Housing solicitors and local historians say the problem is distorting valuations, complicating planning applications, and in some cases delaying sales by weeks while buyers and councils try to establish what a building actually looks like.

The issue matters now because London is in the middle of the largest planning reform push in a generation. The Labour government's Planning and Infrastructure Bill, introduced earlier this year, is designed to fast-track development and cut red tape across England. But faster decisions made on the basis of inaccurate visual records create their own category of risk. An inaccurate photograph filed with a planning application is not a minor administrative glitch — it can render an approval legally vulnerable to challenge.

The Local Records Problem

Two institutions at the centre of this are the Southwark Local Studies Library and Archive on Borough High Street, and the Greater London Authority's London Datastore. The Southwark archive holds hundreds of thousands of images documenting streets, buildings and communities from the Victorian era onward. Staff there have for several years flagged concerns about digitised versions of those images being scraped, re-uploaded without metadata, and circulated across property portals and social media platforms stripped of location information. Once an image loses its metadata — the embedded data identifying when and where it was taken — it becomes almost impossible to trace back to its origin.

The London Datastore, which publishes open geographic and planning data on behalf of the GLA, maintains image datasets tied to planning records across all 32 boroughs and the City. When duplicate images enter those systems — often through automated bulk uploads by estate agents or developers — the knock-on effect can ripple through multiple borough databases simultaneously.

Hackney is a pointed example. The borough processed roughly 4,200 planning applications in 2024-25, according to figures published by the council. With that volume of paperwork moving through the system, manual image verification is not realistic. Officers rely on automated checks, and those checks are only as good as the image-matching tools behind them.

What Residents Can Do — And What Councils Should

For ordinary Londoners the most immediate exposure is in the property market. A buyer in Lewisham or Islington who relies on portal photographs without requesting a fresh independent survey is taking a risk that has always existed but is now amplified by the scale of image duplication online. Rightmove and Zoopla both maintain terms prohibiting the misuse of listing photographs, but enforcement is complaint-driven rather than systematic.

Local heritage groups are pushing back. The Spitalfields Trust, which has campaigned for decades to protect the architectural character of the East End, has in recent months been working to ensure that building surveys it commissions are lodged with Tower Hamlets council in formats that preserve full image metadata. The aim is to create a verified visual record that cannot be easily duplicated and stripped of context.

Community land trusts — there are now more than a dozen active in London, including the Brixton Green project in Lambeth — are increasingly building image verification requirements into their development agreements. Photographs submitted at planning stage must match photographs taken at completion, with discrepancies flagged to the relevant borough planning department.

For residents worried about their own properties, the practical steps are straightforward. Check any online listing against Land Registry title records, request that solicitors confirm photographs match the property address on file, and report obvious mismatches to the relevant portal using their complaints mechanism. The process is not quick, but it creates a paper trail that matters if a sale or planning dispute ever goes to appeal.

The broader fix requires boroughs to mandate metadata-intact image submission as a standard condition of planning applications — something the Planning and Infrastructure Bill has the scope to enforce but does not currently specify. That gap is worth watching as the bill moves through Parliament later this year.