Nairobi's Digital Records Are Drowning in Duplicate Images — And Other Cities Show the Way Out

Nairobi City County's digital land registry, launched with considerable fanfare in 2022, is now estimated to contain hundreds of thousands of duplicate property photographs — scanned documents uploaded twice, three times, sometimes more — clogging servers, inflating storage costs, and slowing the title deed processing that thousands of residents depend on each year. Staff at the county's Ardhi House offices on Ngong Road confirmed the problem exists but declined to give precise figures on the backlog's scale.

The issue matters now for a specific reason. The county government, operating under pressure from Kenya's IMF-linked austerity framework, is midway through a push to digitise all land and property records by June 2027. Duplicate imagery isn't a minor nuisance in that context — it directly affects the integrity of records that banks use for mortgage lending, that courts cite in title disputes, and that the national government relies on for tax mapping. The Kenya Revenue Authority has been expanding its use of geo-tagged property data to assess rates, meaning bad records feed bad valuations.

Two Nairobi institutions are working on the problem from different angles. The Kenya ICT Authority, headquartered on Upper Hill's Trilogy Hotel complex, is piloting an automated de-duplication tool across five county systems, with Nairobi among the first cohort. Separately, iHub — the Ngong Road tech hub that has been a fixture of the Silicon Savannah ecosystem since 2010 — is supporting a cohort of civic-tech startups under its GovTech accelerator strand, several of whom are building image-fingerprinting tools aimed explicitly at public-sector databases. One such startup, working with ward-level data from Mathare and Mukuru, is testing a hash-matching approach that flags likely duplicates for human review rather than deleting them outright, a safeguard considered essential given past data-loss controversies in county digitisation projects.

What Other Cities Have Managed

The comparison with Bogotá is instructive. Colombia's capital completed a systematic de-duplication sweep of its Catastro Distrital — the city's land registry — between 2019 and 2022, reducing its property image database by roughly 34 percent and cutting annual cloud storage costs in the process, according to reporting by the Inter-American Development Bank's urban data programme. The key difference was institutional: Bogotá assigned a dedicated data stewardship team with a defined legal mandate to alter records, rather than leaving the task to general IT staff juggling multiple priorities.

Accra and Lagos, the two West African capitals most often bracketed with Nairobi in digital-governance conversations, are dealing with the same problem in different ways. Accra's Lands Commission has acknowledged a duplicate-records challenge in its e-justice system but has not, as of mid-2026, released a remediation timeline. Lagos, operating through its Land Bureau, began a vendor-led clean-up in early 2025 funded partly through a World Bank urban development credit line — a route Nairobi's current budget constraints make difficult to replicate quickly. Nairobi County's 2025/26 budget allocated Sh2.1 billion to its broader ICT transformation programme, though it is not publicly broken down to show what portion covers data quality work specifically.

What Comes Next for Residents

For ordinary Nairobians — particularly those in Eastlands neighbourhoods like Umoja and Embakasi, where informal property ownership is being formalised under the Affordable Housing Programme — the practical stakes are real. A duplicate land record can trigger a manual review that adds weeks to a title processing queue already running at three to four months in some cases. The county's own service charter targets a 21-day turnaround for standard title transfers, a benchmark that internal assessments have reportedly struggled to meet.

The ICT Authority's de-duplication pilot is due to report preliminary findings in October 2026. If the Nairobi phase shows measurable reductions in storage overhead and processing errors, the authority has indicated it may expand the tool across all 47 counties ahead of the 2027 national digitisation deadline. That would represent a meaningful step — but it requires the county to first make its underlying data accessible to the audit, something that has moved slower than originally planned. Getting the data clean enough to be audited is, for now, the harder problem.