Parts A, B and C: the disclosure checklist in full

The Parts A/B/C structure has outlived the guidance that created it. Portals still validate against it, and it remains the clearest published account of what a buyer or tenant needs to know. Here is the whole thing, with the reason each item exists.

Part A — the commercial basics

Required on every listing. Portals block on these.

• Price or rent. Including the basis, if the sale is by auction or informal tender.
• Tenure. Freehold, leasehold, commonhold or share of freehold.
• Council tax band. Rateable value in Northern Ireland.

And where the tenure is leasehold or share of freehold:

• Lease length remaining. Below roughly 80 years, marriage value makes extension sharply more expensive, and many lenders decline.
• Service charge. The current annual figure and how it is reviewed.
• Ground rent. The figure and any escalation clause. Doubling clauses have made properties unsellable and drew direct CMA enforcement against developers.

A recurring failure here is substituting an adjective for a number. "Low service charge" is not a disclosure. If you know the figure, and it is disclosable, give it.

Part B — physical and service characteristics

Expected on every listing. Portals increasingly hard-gate these, and they are where most otherwise-competent listings fail.

• Property type. Detached, semi-detached, terraced, flat, maisonette, bungalow.
• Construction materials. Walls and roof. Non-standard construction restricts the lender pool, which is precisely why silence about it is read as concealment.
• Number and type of rooms. Bedrooms, bathrooms, receptions, and floor area with the measurement basis.
• Heating. System and fuel. Off-grid oil, LPG and electric storage carry very different running costs from mains gas.
• Electricity, water and drainage. Mains or private, stated separately. Septic tanks and treatment plants carry General Binding Rules duties that transfer to the buyer.
• Broadband. Connection type and highest predicted speed.
• Mobile signal. Indoor and outdoor coverage.
• Parking. Allocated, garage, driveway, on-street, or permit — with the cost if there is one.

Also required, though it sits outside the Parts structure on its own statutory footing:

• EPC rating. A valid certificate must exist before marketing begins and the rating must appear in the advertisement.

In our own sampling, construction, drainage detail, broadband and mobile coverage are the four fields missing from the overwhelming majority of live listings. They are also four of the easiest to fill in once.

Part C — only if the property is affected

These do not need a line on every listing. They need a line whenever the answer is yes — and they need checking either way, because "we did not know" is a weak position when the information was available.

• Flood risk and flooding history. The single most consequential undisclosed defect in residential conveyancing.
• Building safety. For flats: height, cladding, EWS1 status, remediation programme and any contribution liability.
• Restrictions. Listed status, conservation area, Article 4 directions, tree preservation orders, restrictive covenants.
• Rights and easements. Public rights of way, shared or unadopted access, private road maintenance, wayleaves.
• Planning and building regulations. Consents for past works, sign-off certificates, and known nearby development.
• Mining and ground stability. Coalfield, brine, subsidence, heave, underpinning.
• Accessibility. Step-free access, level thresholds, wet rooms, lifts.
• Japanese knotweed. On the property or within seven metres of it.

The part that is easy to miss

Parts A, B and C are about what is absent. The DMCC's misleading actions provision is about what is present — the chain-free claim, the catchment promise, the development potential, the floor area.

A listing can satisfy every field above and still be misleading, because it asserts something the file does not support. Both halves matter, and only one of them is something a portal upload gate can see.