What is AddressBase versus UPRN ambiguity?
Royal Mail delivery points, Ordnance Survey address objects, and why multiple UPRNs can confuse property data joins in Great Britain.
Published: 18 Apr 2026 · Updated: 18 Apr 2026 · 9 min read
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Overview
UPRN should uniquely identify addressable locations; mergers and new builds sometimes show transitional duplication best fixed with authority datasets.
Practical checks
Confirm timings and responsibilities with your conveyancer rather than assuming social media summaries.
Records
When you are the Editor, add dated PDFs and cover notes so other Stakeholders see structured evidence.
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Start from the address on [Property Search](/search). When you own or manage the home, [claim your Property Passport](/claim/start) and upload Documents with clear dates and sources. Browse more explainers in the [Property Guides library](/guides). This article is general information, not legal, tax, mortgage, or survey advice.
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