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BASPI explained

BASPI is the Buyer's and Seller's Property Information form, developed by the Home Buying and Selling Group (HBSG) — a cross-industry group of conveyancers, estate agents, lenders, surveyors and proptech firms working with government to make home moving faster and less prone to collapse. Its ambition: capture all the information about a property once, at the start of marketing, in a single dataset every party can rely on.

What the form covers

Part 1: what the seller knows

  • Ownership and tenure: freehold, leasehold, shared ownership.
  • Disputes, complaints and notices affecting the property.
  • Alterations and building work, and whether consents and certificates exist.
  • Specialist issues: flooding, Japanese knotweed, asbestos, drainage, rights of way.
  • Leasehold detail: ground rent, service charges, the managing agent.
  • Utilities, services, parking and council tax band.

Part 2: the legal pack

  • Title information and supporting documents.
  • Energy Performance Certificate and other required certificates.
  • Guarantees, warranties and planning documentation.

Part 1 is the seller's own disclosure; Part 2 is the supporting evidence a conveyancer assembles. Together they amount to a property pack: everything a buyer's side needs, gathered before an offer rather than after it.

How BASPI relates to the TA6

The TA6 is the Law Society's property information form, traditionally completed after a sale is agreed. The two overlap heavily by design: BASPI was built as the umbrella dataset for the whole industry, and recent editions of the TA6 have aligned with the material information a listing is expected to disclose. A seller who has completed a BASPI-shaped dataset has already answered substantially what the TA6 asks — the difference is when. Every week of difference is conveyancing time saved or lost (see how long conveyancing takes).

Material information: Parts A, B and C

Guidance published by National Trading Standards (through its Estate and Letting Agency Team, NTSELAT) set out what estate agents should disclose in listings, in three parts:

  • Part A: material to every property: price, tenure, council tax band, and for leaseholds the ground rent and service charges.
  • Part B: applies to most properties: utilities, heating, broadband, parking, building safety.
  • Part C: applies where relevant: flood risk, restrictive covenants, rights of way, accessibility, coastal erosion.

The legal footing for disclosure has since moved to the Digital Markets, Competition and Consumers Act 2024, which replaced the older consumer protection regulations. The direction of travel has not changed: omitting information a buyer needs is a consumer-protection issue, and the A/B/C framing remains the clearest map of what buyers should expect to see upfront.

Where this is all heading

The HBSG also backs the Property Data Trust Framework, a data standard that lets verified property information move digitally between platforms, agents, conveyancers and lenders instead of being retyped at every step. The destination: information collected once, verified at source, trusted by everyone downstream.

That is the model PropXchain is built on. Guided forms capture your property information once, your HM Land Registry title is pulled automatically, and everything lives in one shared view with an on-chain audit trail. Starter is free with no platform fee; the optional £75 AI co-pilot reads your title and searches in plain English and tailors your conveyancer quote request. See pricing or selling your house online.

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