Lines on a Plan, Lines on the Ground: Assembling Boundary Evidence Before Exchange

A garden boundary can look entirely settled from the lawn. The hedge has been there for decades; the fence posts are straight; the wall matches the one next door. None of that, on its own, fixes the legal boundary. Registered title plans ordinarily show general boundaries rather than precise measured lines, and a discrepancy between what a buyer sees and what the deeds describe frequently emerges only after completion, when a neighbour produces an old conveyance or a plan from a previous sale.

The prudent approach in 2026 is to treat garden features as evidence to be tested, not as the boundary itself. That means assembling a file in three parts: the registered title plan, the conveyance and transfer deeds behind it, and a dated record of what is physically on the ground. The purpose is not to commission a forensic survey of every suburban garden, but to identify at an early stage whether the line is clear, arguable or genuinely uncertain.

The title plan is an index, not an answer

HM Land Registry title plans are drawn to Ordnance Survey mapping and are described as showing general boundaries. The red line indicates the extent of the registered title in broad terms; it is not a declaration that the legal boundary follows the centre of a hedge or the face of a wall. On plans at 1:1250 in built-up areas, and 1:2500 in many rural locations, the thickness of the printed line can itself represent a meaningful distance on the ground.

Buyers should obtain an official copy of the register and title plan for the property, and it is often worth obtaining the same for immediate neighbours. The register may reveal a notice, a boundary agreement or a determined boundary entry that the marketing particulars overlooked. It may also show that a strip of land is registered under a separate title, or that the property benefits from a right over adjoining land. These are not matters to leave to a glancing comparison between the estate agent’s plan and the garden fence.

A practical caution: do not scale measurements from a title plan. The plan is an identification tool. Where a transfer deed contains a clause stating that the plan is for identification only, that wording is intended to prevent the plan from being treated as a definitive measurement of the boundary.

Deeds carry the detail the plan omits

The conveyancing chain often contains more useful boundary information than the current title plan. Older conveyances and transfers may include a detailed plan, measured dimensions, references to boundary features, or covenants requiring one party to maintain a fence or hedge. Estate plans from the original sale of a larger parcel can show how a plot was intended to be divided, even where later registered plans have generalised the line.

Ask the seller’s solicitor for the complete chain of deeds and any attached plans. Where the property was formerly part of a farm, estate or larger development, the first conveyance of the plot is particularly relevant. Look for phrases such as “more or less”, “or thereabouts” and “retained land”; these signal that the original parties accepted a degree of imprecision. Also check for rights of way, drainage easements and obligations to repair shared boundaries, because a boundary that is physically clear may still carry liabilities that affect its use.

Physical clues have weight, but not authority

The third part of the file is the site inspection. Record the position and condition of fences, hedges, walls, ditches, gates, paths, drains and meter boxes. Note which side of a fence the posts and rails face, though the common assumption that a homeowner owns the “good side” is a convention rather than a rule of law. Check whether a hedge sits wholly within one garden or straddles the line suggested by the title plan. Look for older features—stone plinths, established roots, original gate piers—that may predate the current owners.

Historic Ordnance Survey maps and aerial imagery can show how a boundary has moved over time. A local record office or online map archive may hold tithe maps or estate plans. Photograph the features with a date reference and, where possible, a scale. Keep the images with the file rather than on a phone that will be replaced within two years.

Occupation of land over many years can, in limited circumstances, support a claim to ownership, but adverse possession of registered land is a technical and uncertain area. A buyer should not assume that long use by a previous owner resolves an unclear boundary. It may instead be the source of a future dispute.

When the evidence conflicts

If the title plan, the deeds and the ground disagree, the first step is a targeted enquiry of the seller. The property information form should disclose disputes and complaints, but buyers and their solicitors should ask directly whether any boundary feature has been moved, replaced or informally agreed with a neighbour. Ask for copies of any correspondence, even if it is old.

Where an informal arrangement exists, a written boundary agreement between the neighbouring owners can regularise the position. For registered land, an application for a determined boundary can fix the line on the register, but it requires evidence, neighbour notification and cost. An indemnity policy may be available, but cover is usually limited: insurers will not indemnify a buyer who already knows of a dispute, and a policy does not physically move a fence or resolve an ongoing argument. It is a financial backstop, not a substitute for evidence.

A file to keep before exchange

By the point of exchange, a buyer should hold the official register and title plan, the relevant deeds and transfer plans, any boundary agreement or statutory declaration, dated photographs of the physical features, the seller’s answers to boundary enquiries, and a short note recording where the documents agree and where they do not. For higher-value or rural property, a boundary survey by a qualified surveyor may be proportionate.

The working rule is simple: the hedge is not the deed, and the title plan is not a measured drawing. Both are evidence. Read together, and tested against the ground, they allow a buyer to decide whether the boundary is clear enough to accept, whether protection is needed before exchange, or whether the risk is better avoided.