The legal pack is the single most important document in a property auction sale. Reviewing it properly, ideally with a solicitor, is the difference between a profitable flip and a six figure mistake.
What is an auction legal pack?
A legal pack is the bundle of legal documents the seller provides before the auction, containing everything a buyer needs to assess the title, planning, and contractual conditions of a lot. It is the auction equivalent of the pre-contract enquiries pack in a standard conveyancing transaction. Unlike an estate agent sale, there is no post-offer investigation phase. You are expected to review the legal pack fully before bidding.
Auction legal packs are prepared by the seller’s solicitor. The auction house hosts them on its website, usually behind a registration wall. Most residential packs run to 40 to 80 pages. Commercial and mixed use lots can run to several hundred pages.
Legally, the legal pack forms part of the sale contract. If the pack contains a restriction, covenant, or unusual Special Condition, you are deemed to have accepted it on the fall of the hammer whether you read it or not.
What documents does a legal pack typically contain?
A standard residential legal pack includes core title and search documents plus any tenancy and planning paperwork relevant to the property. The table below lists the documents you should expect, along with what each one tells you.
| Document | What it contains | What to check |
|---|---|---|
| Title Register | Owner name, price history, covenants, charges, restrictions | Current owner matches seller, no undisclosed charges, no restrictions on use |
| Title Plan | Legal boundary outlined in red | Plan matches physical boundaries, no missing land or disputed areas |
| Special Conditions of Sale | Bespoke clauses overriding the standard auction contract | Buyer cost obligations, completion date variations, indemnity waivers |
| Local Authority Search | Planning history, building control, road adoptions | Outstanding enforcement notices, unadopted roads, planning refusals |
| Drainage and Water Search | Connection to mains, public sewers under the land | Private treatment plants, build-over agreements |
| Environmental Search | Contamination, flood, radon, landfill history | Flood Zone 2 or 3, former industrial use, high radon areas |
| Energy Performance Certificate (EPC) | Energy rating A to G | Rating of E or above for residential lettings post-2025 |
| Replies to Pre-Contract Enquiries | Seller’s answers on disputes, works, notices | ”Not known” answers on neighbour disputes or planning notices |
| Lease (if leasehold) | Term, ground rent, service charge structure | Remaining term, escalation clauses, forfeiture triggers |
| Tenancy Agreements | Current occupier terms | Assured, regulated, or AST status, rent arrears, section notices |
Not every pack contains every document. Some sellers omit environmental searches or rely on indemnity insurance. A missing document is itself a red flag worth investigating.
The Title Register and Title Plan (what to check)
The Title Register is the official HM Land Registry record of ownership. It shows the registered owner, the price paid on the last registered transfer, any mortgages or charges, and any restrictions or covenants that bind the land. The Title Plan shows the boundary in red outline.
You can verify what the seller provides by ordering the same documents directly from HM Land Registry at landregistry.data.gov.uk. A Title Register costs £3 and a Title Plan costs £3. If the seller’s pack contains an old copy, pull the current version yourself to check nothing has changed.
Check four things on the Title Register. First, the registered proprietor matches the seller. Probate sales require additional evidence such as grant of representation. Second, any charges (mortgages) will be discharged on completion. Third, no restrictions block the sale. Fourth, covenants in the charges register are compatible with your intended use of the property.
Special Conditions of Sale (the most important section)
Special Conditions of Sale are bespoke clauses that override or supplement the standard RICS Common Auction Conditions. They are the single most important part of the legal pack to read. Sellers use Special Conditions to shift costs, disclaim liability, and change the default completion timetable.
Common Special Conditions include: buyer to pay seller’s legal fees (typically £1,200 to £2,500 plus VAT), buyer to pay seller’s search fees, buyer to pay auction entry fee (often £1,500 to £3,000 plus VAT), completion in 14 days instead of 28, vacant possession not guaranteed, and the sale is subject to existing tenancies regardless of what viewings suggested.
Read every Special Condition line by line. Add up the buyer cost obligations and treat them as part of the purchase price when calculating your maximum bid. A lot listed at £120,000 with £4,000 of buyer costs effectively costs £124,000 before Stamp Duty.
Searches: Local Authority, Drainage, Environmental
Three searches appear in most residential legal packs. The Local Authority search (LLC1 and CON29) covers planning permissions, building regulations, enforcement notices, road adoption, and Section 106 obligations. Look for outstanding enforcement notices, unadopted access roads, and any pending planning applications on neighbouring land.
The drainage and water search confirms that the property connects to mains water and public sewers. If the search reveals a private septic tank or a shared access, you will need a maintenance agreement. Build-over agreements for extensions above public sewers are also flagged here.
The environmental search checks flood risk, contamination, radon, and landfill history. Pay particular attention to flood risk. Flood Zone 2 means a 1 in 1,000 annual risk. Flood Zone 3 means a 1 in 100 annual risk. Properties in Flood Zone 3 can be uninsurable or carry prohibitive premiums outside the Flood Re scheme.
Leasehold properties: What additional checks are needed
Leasehold lots require extra scrutiny. In addition to the standard documents, the pack should include the lease itself, the freeholder’s management information pack, recent service charge accounts, and any major works notices under Section 20 of the Landlord and Tenant Act 1985.
Check the remaining lease term first. Leases under 80 years trigger “marriage value” and become expensive to extend. Lenders are reluctant to mortgage leases with fewer than 70 years remaining. Check the ground rent structure. Leases with ground rent doubling every 10 or 25 years can be unmortgageable.
Review recent Section 20 notices. If the freeholder has served a notice for major works, the leaseholder (you, post completion) is liable for their share. Roof, window, and lift works on blocks of flats routinely run to £15,000 to £40,000 per leaseholder.
Red flags that should make you walk away
Some issues in a legal pack are fixable with price adjustment or indemnity insurance. Others should make you walk away entirely. Walk away red flags include: missing Title Register or incomplete chain of ownership, sale “subject to” an undefined tenancy, pending enforcement notices, Japanese knotweed disclosure, unregistered land, and short leases under 50 years.
Be cautious of cladding issues on flats. Post-Grenfell cladding remediation obligations can attach to leaseholders even where the Building Safety Act 2022 provides some protections. Legal packs should include EWS1 forms for buildings over 11 metres.
Missing documents are a red flag in themselves. A pack without a Local Authority search or without a Title Register is incomplete. Ask the auction house why and, if no satisfactory answer comes, assume the worst.
Should you have a solicitor review the legal pack?
Yes. A solicitor review of a residential legal pack typically costs £300 to £600 and takes two to three working days. That cost is negligible compared to the downside of missing a covenant, an undeclared tenancy, or an onerous Special Condition.
Use a conveyancing solicitor with specific auction experience. Standard residential conveyancers are not always familiar with auction timescales, addendums, and the interaction between the legal pack and the Common Auction Conditions. Many auction houses keep a panel of experienced firms.
Request the review in writing, addressed to you, summarising the key risks and any buyer cost obligations. Keep the report. If anything in the pack changes via addendum, send the addendum to your solicitor for a quick supplementary review before bidding.
Frequently Asked Questions
See the FAQs at the end of this guide for answers to the most common legal pack questions from UK auction buyers.
For a broader overview of UK property auctions, see UK Property Auctions: The Complete 2026 Guide. For a deep dive on finding hidden value at auction, see Property Auction Arbitrage.