Statutory Diligence GuideUpdated October 2026

What Searches Are Carried Out When Buying a House in the UK?

Statutory Source: Law Society Conveyancing Handbook & SRA Standard Regulatory Guidance
Direct Statutory Answer (The Short Version)

Standard UK conveyancing searches comprise four mandatory core searches: (1) Local Authority Search (LLC1 and CON29), (2) Drainage and Water Search (CON29DW), (3) Environmental Search (flood, contaminated land, and ground subsidence), and (4) Mining Search (CON29M in coal extraction areas), alongside optional Land Charges and Chancel Repair searches.

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The Purpose of Conveyancing Searches in England & Wales

When purchasing property, HM Land Registry records prove who owns the legal title. However, Land Registry documents do NOT reveal local planning constraints, underground public sewers, unadopted access roads, historical industrial contamination, or nearby railway and bypass schemes.

To uncover these hidden liabilities, your conveyancing solicitor conducts statutory 'Searches' across public registers held by local councils, water statutory undertakers, the Coal Authority, and environmental agencies. If taking a mortgage, your lender makes these core searches legally mandatory.

Complete UK Conveyancing Searches Matrix: Core & Location-Specific
Search TypeStatutory Form / BodyTypical Cost RangeTurnaround TimeMortgage Requirement?
Local Authority SearchLLC1 (Land Charges) + CON29 (Enquiries)£100 to £2505 to 25 working daysMandatory for all mortgage lenders
Drainage & Water SearchCON29DW (Water Statutory Undertaker)£50 to £1002 to 5 working daysMandatory for all mortgage lenders
Environmental SearchCommercial environmental provider (EA data)£50 to £901 to 3 working daysMandatory for all mortgage lenders
Coal Mining SearchCON29M (The Coal Authority)£35 to £601 to 3 working daysMandatory in coal mining designated zones
Chancel Repair Liability SearchChancelCheck / National Archives£20 to £35 (or £15 indemnity)1 to 2 working daysRequired if property in parish with church chancel repair duty
Land Charges SearchForm K15 (Land Charges Registry)£2 to £5 per name1 working dayMandatory when buying unregistered property
Common Land & Village GreenCON29O (Optional Local Authority)£20 to £405 to 15 working daysRecommended for rural homes bordering open land

The 4 Mandatory Core Searches Explained in Detail

Every standard conveyancing search pack contains four cornerstone searches:

1. Local Authority Search (LLC1 & CON29): LLC1 reveals binding local land charges (Tree Preservation Orders, listed building status, conservation area restrictions). CON29 reveals planning history, building control completion notices, road adoption status, and proposed major transport schemes (HS2, tram lines, new bypasses) within 200m.

2. Drainage and Water Search (CON29DW): Conducted with the regional water board (e.g. Thames Water, Severn Trent). Confirms whether foul and surface water drain to public mains, water meter presence, and whether public sewers cross within property boundaries (which restricts building extensions).

3. Environmental Search: Evaluates historical industrial use over 150 years, checking for toxic chemical contamination, nearby landfill sites, radon gas emission zones, ground subsidence risk, and river/surface water flooding.

4. Mining Search (CON29M): Essential in areas with historic coal extraction. Checks for recorded underground mine shafts, past subsidence claims, and future open-cast mining proposals.

The Sewer Build-Over Trap

If a drainage search reveals a public sewer running beneath a rear garden extension without a formal 'Build-Over Agreement' signed with the water utility, the water authority possesses statutory rights to enter the land and dig up the extension to repair the pipe.

What Happens When a Search Returns an Adverse Result?

If a search returns an adverse result, conveyancers take immediate protective action:

• Raising Formal Enquiries: Requesting missing planning permissions, building regulation certificates, or FENSA window guarantees from the vendor.

• Legal Indemnity Insurance: For technical defects older than statutory enforcement limits, the vendor purchases a bespoke legal indemnity policy protecting the buyer and lender.

• Price Renegotiation or Withdrawal: If an uninsurable environmental hazard or severe unadopted road maintenance liability is revealed, the buyer renegotiates or walks away.

How to Pre-Screen Searches for Free Before Instructing Solicitors

Why wait 4 weeks and spend £400 on searches when open government data can answer fundamental questions today?

Our free Property Due Diligence Checker aggregates official Environment Agency flood maps, planning data, rights of way, crime statistics, and council tax records in seconds.

Cash Buyer Advice

While cash buyers are technically free to skip searches, doing so is highly inadvisable. Buying a home without searches leaves you vulnerable to unadopted road maintenance bills, contaminated land cleanup notices, and unpermitted building enforcement.

Step-by-Step Checklist for Managing Conveyancing Searches

Follow this checklist to ensure searches proceed efficiently:

Step-by-Step Procedure:
Run an instant preliminary screening on our Property Due Diligence Checker before making an offer.
Ask your conveyancer to order searches immediately upon instruction to minimize council backlog delays.
Confirm whether a Coal Mining search (CON29M) is required for the specific postcode.
Review the returned search reports carefully with your solicitor, paying special attention to unadopted roads and public sewers.
Ensure any missing building control completion certificates are covered by vendor-paid indemnity insurance prior to exchange.
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Official Statutory Notice & Guidance:

This guide is compiled for informational due diligence referencing official statutory records from Law Society Conveyancing Handbook & SRA Standard Regulatory Guidance under the Open Government Licence v3.0. Legal titles and physical structural condition should always be independently inspected by a qualified conveyancing solicitor and chartered RICS surveyor prior to legally binding property commitments.