Anonymising LLC1 and CON29 Local Authority Search Results – UK GDPR-compliant anonymisation per UK GDPR
A local authority search is a mandatory pre-contract step in virtually all residential conveyancing — around 1 million completions per year in England and Wales. It comprises the LLC1 (Local Land Charges Register search) and the CON29 enquiries, disclosing planning history, enforcement notices, and financial charges — many referencing named individuals. anonym.legal pseudonymises those identifiers while preserving the substantive search results and local authority responses.
When this applies
This task applies when LLC1 and CON29 search results are shared with a purchaser's advisers, a funder, or a third-party consultant who needs the planning and local-charge information but has no UK GDPR Art. 6 lawful basis to retain the identities of named individuals referenced in those results beyond what their role requires.
How anonym.legal handles it
- Upload the LLC1 and CON29 search results (typically received as a combined PDF from the local authority or a personal search company).
- The engine identifies named individuals in local land charges (e.g. financial charges naming individuals), planning enforcement notices, and listed-building or conservation-area notices.
- Each natural person is pseudonymised consistently; planning references, road adoption status, drainage agreements, and the substance of any enforcement notices remain in clear text.
- A mapping table is produced with UK/EU data residency.
- Release the pseudonymised search results for review; the originals should be retained and provided to the lender if required.
- Re-identify via the mapping key before any formal lender or regulatory submission.
What you provide
- LLC1 Local Land Charges search certificate
- CON29 enquiries of the local authority (standard and any optional questions)
- CON29O optional enquiries (if raised)
Limitations & cautions
- Local authority searches have a limited validity period — HM Land Registry Practice Guides recommend fresh searches if the original is more than six months old; ensure the search is current before relying on results for exchange.
- The tool pseudonymises personal identifiers in search results but does not advise on the planning or legal implications of any entries — obtain conveyancing advice.
- Personal search companies' results are not official local authority documents; the same pseudonymisation approach applies but confirm accuracy with the search provider.
FAQ
Are planning enforcement notices pseudonymised in the CON29 results?
Named individuals in enforcement notices (e.g. the notice addressee) are pseudonymised. The enforcement notice reference number, breach description, and compliance status are preserved. Enforcement notices appear in a significant proportion of the around 1 million property transactions per year in England and Wales (HMRC Property Transactions Statistics 2023-24), particularly in residential sales with prior development history.
Do local authority financial charges (e.g. council improvement grants) name individuals?
Some local land charges (such as improvement grants under housing legislation) may name the property owner or grant recipient. Those individuals are pseudonymised while the charge amount and purpose are preserved. Over 25 million titles on the HM Land Registry open register may carry LLC1 entries (Land Registration Act 2002), and many properties carry historic financial charges from the 1950s to 1980s that name individual recipients.
Can I process local authority searches for multiple properties in a portfolio transaction?
Yes. Upload all search results in a batch. The engine tracks individuals who may appear across multiple searches (e.g. a landlord owning several portfolio properties) and applies consistent pseudonyms. UK GDPR fines of up to £17.5 million or 4% of annual global turnover (DPA 2018 s.157) incentivise robust data minimisation across portfolio due diligence.
Are there standard CON29 search forms for all local authorities in England and Wales?
Yes. The CON29, CON29O (optional enquiries), and CON29R (residential) forms are prescribed by the Law Society and are used by all local authorities. Each search covers the specific registered title and surrounding land — with over 25 million titles on the HM Land Registry register, searches are requested on around 1 million properties per year (HMRC Property Transactions Statistics 2023-24). SDLT at 5 percent on £250,001 to £925,000 and 10 percent to £1.5 million (Finance Act 2003 Part 4) means high-value transactions particularly require comprehensive search due diligence.