Four sample folios.
Read every one in full.

A Buyer Folio is a commissioned research report on one specific English property, written for the buyer. It runs to ten sections and establishes what directly comparable properties have actually sold for, how much negotiating leverage the listing carries, what liabilities sit on the address in the public record, and a tactical offer bracket — open, aim and walk-away. It costs £349 including VAT on requests made by 15 October (£480 after that), and arrives within two working days of payment.

Portal estimates are automated valuation models. They return a single figure without naming the transactions behind it, without stating the matching rules applied, and without indicating how much evidence sat underneath — you cannot audit one, and you cannot take one into a negotiation. A Buyer Folio names every comparable transaction it used, states the matching rules it applied, and discloses where its evidence was thin. It also refuses to say what a property is worth — it reports only what directly comparable properties have achieved, which is a claim that can be defended in front of an estate agent.

Yes. A Buyer Folio reports what the registered evidence shows, in either direction. If the asking price sits inside the range that directly comparable sales support, the folio says so; if it sits below what directly comparable homes have achieved, it says that too, as the SE23 folio above does. You still receive the full offer bracket — where to open, what to aim for and when to walk away — but the finding may be that the price is fair rather than inflated.

A single self-contained document you can read on a phone, print, or forward to a solicitor or mortgage broker. It includes the Glass Box Anchor, the full named comparables ledger, the Leverage Matrix score, the risk register, the cost-of-ownership picture, the tactical offer bracket, and the email scripts for putting each offer to the selling agent.

The Identity Lock is the rule that decides which sales are allowed to inform your number. Sales are matched on property type, tenure and new-build status, then on three further structural dimensions covering construction era, size and — for houses — the land itself. A two-bed leasehold flat is compared only to sales that match it on every dimension; the lock is what stops a three-bed freehold terrace on the same street from contaminating the evidence. The exact banding rules are stated in full inside every folio.