UPRN for Local Authorities: What You Need to Know
UPRNs are the foundation of address data infrastructure in UK local government. This guide covers everything council officers and data teams need to know about using UPRNs effectively across your services.
Why UPRNs Matter in Local Government
Local authorities are required to use UPRNs as the standard property identifier in data submissions to central government and when sharing data across council services. The rationale is straightforward: without a shared reference number, different departments and systems cannot reliably identify whether they are referring to the same property.
Consider a council's housing department, revenues team, and social care service. Each may hold a record for the same property — but formatted differently, abbreviated differently, or entered at different times with varying levels of accuracy. Without UPRN alignment, these records cannot be automatically linked. With UPRN matching, every department is working from the same authoritative property reference.
Data Sharing
UPRNs enable reliable automated data sharing between council systems — and between councils and central government.
Deduplication
A shared UPRN across systems makes it straightforward to identify and merge duplicate property records.
LLPG Compliance
Council address data should align with the Local Land and Property Gazetteer. UPRN matching ensures operational data stays consistent with the authoritative standard.
Common UPRN Matching Challenges for Councils
Legacy Data
Many councils hold decades of address data entered before consistent UPRN standards were in place. This data needs retrospective UPRN assignment before it can be used reliably in modern systems.
System Migrations
When moving to new housing, revenues, or case management platforms, historical address data often arrives in non-standard formats that require cleansing and UPRN matching before import.
New Developments
New-build properties are sometimes occupied before their UPRN is formally registered in the LLPG, creating a window where addresses exist in operational systems but cannot yet be matched.
Cross-Service Inconsistency
The same property may be recorded differently across housing, planning, and environmental systems — requiring a UPRN matching exercise to align records before automated linking can work.
How Semilariti Supports Council UPRN Programmes
Semilariti is used by local authorities to match address datasets from any council system to their authoritative UPRNs — quickly, accurately, and without the cost of traditional address data providers.
Upload your address CSV, and receive back a UPRN-matched, standardised dataset in 5 to 30 minutes. Every matched record includes a confidence score, so your team can immediately identify which records are ready to use and which warrant a manual review.
What councils use Semilariti for:
→ Housing register cleansing and UPRN assignment
→ Council tax database standardisation
→ Planning application address validation
→ Social care system migrations
→ Environmental services route planning data
→ Cross-system address reconciliation projects