'My History Is Just Gone': SF Residents Speak Out as City's Digital Archive Purges Duplicate Images

Hundreds of San Francisco residents and small business owners discovered this spring that photographs, building permits and community records they had uploaded to city-managed digital portals were deleted — flagged by an automated deduplication system as redundant copies and removed without individual notification. The San Francisco Department of Technology confirmed the cleanup, which ran between February and May 2026, affected files across multiple city-facing platforms including the SF311 service request system and the Planning Department's online permit portal.

The deletions hit hardest in neighborhoods with active historic preservation cases and small businesses navigating the city's notoriously backlogged permitting system. For some residents, the records were the only digital copies they had.

Chinatown and the Mission Took the Hardest Hits

On Waverly Place in Chinatown, the Chinese Historical Society of America learned in April that several dozen photographs submitted to support a 2024 landmark designation application had been removed. The images documented the interior of a family association building on Sacramento Street dating to the 1890s. Staff at the organization said they were not warned before the files disappeared from the Planning Department portal. The society has since begun reconstructing the record from physical prints.

In the Mission District, small business owners who submitted façade photographs as part of the Legacy Business Registry application process — a program administered by the city's Office of Economic and Workforce Development — reported that images they uploaded in late 2025 were gone by March. The Legacy Business Registry, established in 2015, has listed more than 350 businesses across the city and requires photographic documentation as part of each application. Losing those images can stall or complicate renewals.

One ceramics studio owner on 24th Street said she had no backup of the interior photographs she submitted because she assumed the city's system was the safe copy. She described spending three weekends reshoot and resubmit documentation. Her story was echoed by others at a community meeting held in May at the Bernal Heights Neighborhood Center on Ellsworth Street, where roughly 60 residents gathered to compare experiences and push for answers.

How the Deduplication System Worked — and Where It Failed

The Department of Technology said the automated system used a hash-matching algorithm to identify files with identical or near-identical digital fingerprints. When two files matched above a set similarity threshold, the system retained one and deleted the other. The problem, according to city technology staff, was that the algorithm did not distinguish between files uploaded by different users for different purposes. A photograph of a storefront submitted by a property owner for a building permit could be flagged as a duplicate of a similar image submitted months earlier by a neighborhood association for a planning study — and one would be deleted.

The city has not released a full accounting of how many files were affected, but a March 2026 internal memo obtained through a Sunshine Ordinance request — San Francisco's public records law — referenced more than 14,000 files removed across seven platforms between February 3 and May 12. The Department of Technology said it is working to restore files from backup servers, but warned that backups for some platforms only go back 90 days.

Advocates at the Tenderloin Housing Clinic on Turk Street, which helps low-income residents navigate city systems, said several clients had lost images tied to habitability complaint cases filed through SF311. Losing that photographic evidence can weaken a tenant's position when a case proceeds to the Department of Building Inspection.

The Department of Technology said it has paused the deduplication program and is auditing the algorithm's parameters. Residents who believe their files were wrongly deleted can file a records restoration request through the SF311 portal or in person at City Hall, Room 405. The department said it aims to process restoration requests within 30 business days. Community organizations with active Planning Department or OEWD cases are advised to contact those departments directly and request a case hold while their documentation is reconstructed. Backups should be kept off city servers regardless of any future system assurances.