How to Find Your UPRN Number
Every property in Great Britain has a Unique Property Reference Number. Here is exactly how to find it — whether you need one address or thousands.
What is a UPRN and Why Do You Need One?
A UPRN (Unique Property Reference Number) is a unique numerical identifier assigned to every addressable property and land parcel in Great Britain. There are over 40 million UPRNs, covering everything from houses and flats to commercial buildings, schools, and individual units within larger developments.
UPRNs matter because they eliminate the ambiguity of address matching. "12 High Street" and "12 High St" and "12 High Street, London" all refer to the same property — but a computer cannot reliably know that without a shared reference number. UPRNs solve this problem permanently.
They are increasingly required in local government data submissions, financial services compliance workflows, and property industry applications — making the ability to find and match UPRNs an essential data capability.
Way to Find a UPRN
A UPRN (Unique Property Reference Number) is a unique numerical identifier assigned to every addressable property and land parcel in Great Britain. There are over 40 million UPRNs, covering everything from houses and flats to commercial buildings, schools, and individual units within larger developments.
When you need to find UPRNs for hundreds or thousands of addresses — particularly if those addresses are messy, incomplete, or inconsistently formatted — bulk UPRN matching is the only practical approach.
Semilariti processes your entire address list in a single upload, matching each record to its UPRN using ML algorithms that handle typos, abbreviations, and non-standard formatting automatically. Results are returned in 5 to 30 minutes with confidence scores on every match.
How Bulk UPRN Matching Works with Semilariti
Finding UPRNs for large address datasets is a three-step process:
Upload Your CSV
Prepare your address list as a CSV file — any format, any level of cleanliness. Semilariti handles non-standard formatting, missing fields, and typos.
ML Matching
Our algorithms parse, standardise, and match each address against authoritative databases. Typos are corrected, abbreviations are expanded, and each address is resolved to its UPRN.
Download Results
Receive a clean output CSV with the matched UPRN, standardised address, and confidence score alongside each original record.
Your Input
hose 7 freen line london e2 8aa
23 elmgrove london sr15 5oo
flat 4, grn st manchstr m1 2ab
Semilariti Output
House 7 Green Lane, London E2 8AA
UPRN: 5487621 · 98%
23 Elm Grove, London SE15 5PU
UPRN: 199356 · 91%
Flat 4, Green Street, Manchester M1 2AB
UPRN: 7723410 · 87%
Who Needs to Find UPRNs?
Local Authorities
Councils need UPRNs to align data across housing, revenues, planning, and social care systems. UPRN matching ensures all departments are working from the same property reference.
Banks & Mortgage Lenders
Lenders use UPRNs to identify properties unambiguously in mortgage applications, valuations, and portfolio management — reducing errors and speeding up processing.
Insurance Providers
Insurers match policy addresses to UPRNs to ensure accurate property location data feeds into underwriting models and risk assessments.
Mortgage Brokers
Brokers use bulk UPRN matching to clean and standardise client address data before submission — reducing rejections caused by address mismatches.