Land Registry Boundary Maps: How to Read a Title Plan

A Land Registry boundary map is usually the title plan for a registered property. It shows the general extent of the title in relation to Ordnance Survey mapping, commonly with red edging around the land.

What it usually does not show is the exact legal boundary on the ground.

That difference explains most title-plan confusion. A plan can be authoritative as part of the register while still being the wrong tool for deciding whether a fence should move by 20 centimetres. This guide explains how to read the red line, where T-marks fit, and what other evidence to use when the line matters.

A title plan identifies the registered extent in map context. The fence outside is a separate physical feature that needs its own evidence.

What is a Land Registry title plan?

Every registered title has a written register and, in ordinary cases, a title plan. The plan supports the property description by showing the land's general location and extent.

HM Land Registry's practice guide on title plans says the purpose of the title plan is to provide a graphic representation of the registered title. It may also identify land affected by register entries such as easements, covenants or areas removed from the title.

The main documents do different jobs:

Never read the title plan in isolation when the register points to another document.

What does the red line mean?

In most title plans, red edging shows the land included in the registered title. The plan may also use colouring, hatching, numbers or lettered points. Those additions often correspond to written entries in the register.

The red edging is a cartographic convention. It is not a painted stripe on the ground. Its apparent thickness on a PDF or screen has no fixed real-world width.

HM Land Registry normally draws the edging inside the line of the mapped physical boundary so that the underlying OS feature remains visible. That presentation choice must not be interpreted as evidence that the title stops a specific distance inside a wall or fence.

Where the feature is too small for normal edging, land may be tinted or shown in another way. Where a boundary is not defined by a feature on the base map, a pecked line may be used. Always match unusual markings to the register.

General boundaries: the rule behind the map

England and Wales operates a general-boundaries system for most registered land. The legal boundary is an invisible line dividing one person's land from another's. A physical boundary is the fence, wall, hedge, ditch or other feature visible on site.

The two may coincide, but they are not interchangeable.

HM Land Registry's current boundary practice guide says the exact legal line is rarely identified with precision in conveyances, transfers or on the ground. It also explains that Ordnance Survey mapping does not show legal boundaries.

Under the general-boundaries approach, the title plan identifies the boundary generally without determining whether the legal line runs along the centre, inner face, outer face or another part of a physical feature.

This is not a defect in your particular plan. It is how most registered boundaries are recorded.

Why you should not measure the red edging

Suppose an urban title plan is shown at 1:1250. At that scale, one millimetre on paper represents 1.25 metres on the ground. A line that appears less than a millimetre thick can therefore cover a meaningful ground distance before scanning, printing and screen scaling are even considered.

Title-plan scales are usually 1:1250 in urban areas and 1:2500 in rural areas, with smaller scales possible for large rural titles. The underlying OS mapping has its own representation and accuracy characteristics. Historic deeds may have been prepared at another scale or copied several times.

For those reasons, these methods are unsafe:

• Enlarging the plan to 400% and measuring pixels
• Taking the middle of the red line as the legal boundary
• Matching one red-line corner to a phone GPS coordinate
• Assuming the fence symbol's near or far face decides ownership
• Overlaying plans from different dates without checking scale and alignment

A precise digital measurement from an imprecise interpretation is still an imprecise answer.

Ordnance Survey features are not legal boundaries

Title plans use Ordnance Survey mapping as their topographic base. That gives recognisable context such as buildings, roads, walls, fences, hedges and paths.

OS maps record physical features according to mapping specifications. They do not determine land ownership. A mapped wall may follow a title boundary, cross it or sit wholly on one side. A hedge shown years ago may have widened. A new fence may not yet appear.

This is why “the red line follows the OS fence” is not the same as “the fence belongs to this title”. The first statement describes the plan's appearance. The second is a legal conclusion requiring more evidence.

If the practical question is fence responsibility, read our which fence is mine guide before relying on posts, rails or plan symbols.

What do other colours and markings mean?

There is no safe universal interpretation for every coloured area without the register. Common plan references may identify:

• Land included or excluded from the title
• A right of way or access route
• Land affected by a covenant
• Separate parcels
• Areas transferred out
• Easements or service routes
• Boundaries referred to in a deed

The register should explain the relevant reference or direct you to a filed document. A green tint on one title does not necessarily have the same meaning as green on an unrelated title.

When a coloured route appears to cross a neighbour's land, do not assume it transfers ownership. It may represent a right benefiting or burdening the title.

T-marks and missing T-marks

T-marks are frequently misunderstood because they look like a ready-made fence-ownership key.

A T-mark may show responsibility for maintaining a boundary feature where the associated deed or register expressly gives it that meaning. HM Land Registry may reproduce the mark, describe the affected boundary in the register, or file the deed plan containing it.

The written provision is essential. A mark copied onto a deed plan without any supporting text may have no special force or meaning in law.

If there are no T-marks on the title plan, that is normal. It does not create a default left-or-right fence rule. Check:

1. The title register
2. Any transfer or conveyance mentioned in it
3. The neighbouring title
4. Later boundary agreements
5. Historic evidence about the feature

Responsibility to maintain a fence and ownership of the fence or land can also be different issues.

Title plan, title register and filed deeds: a reading sequence

Use this order when a plan raises a question:

1. Confirm the title number and tenure

Make sure the plan belongs to the correct freehold or leasehold title. A flat, garage or parking space may have a separate title and plan.

2. Read the property description

Check whether the register describes more than one parcel and whether the address has changed.

3. Note every plan reference

List colours, numbers, letters, pecked lines and T-marks. Do not interpret them yet.

4. Match each reference to the register

Find the entry that explains the marking. Note any date and document name.

5. Obtain the filed document

If the register refers to a transfer, conveyance or deed as filed, request it where the detail affects your decision.

6. Compare both titles and the site

Review the adjoining documents and physical features. One side's documents rarely tell the complete historical story.

This sequence is slower than drawing a conclusion from the red line, but much faster than correcting a fence installed in the wrong place.

Is a Land Registry map search the same as a title plan?

No. Several services and datasets are described informally as “Land Registry maps”.

• Search for land and property information helps the public find registered titles and buy the official register and plan.
• Search of the index map is a formal search used to establish whether land is registered and identify affected title numbers.
• MapSearch is a Business e-services tool for eligible customers.
• INSPIRE Index Polygons are spatial data showing the indicative locations of registered freehold titles.
• The title plan is the plan forming part of the individual registered title.

They are connected, but one output should not be passed off as another.

HM Land Registry's guidance on information it holds explains that a free property summary can be viewed online, while the title register and title plan can be purchased. If ordinary searches do not identify the land, an index map search may be appropriate.

How Boundary Finder uses general-boundary data

PlanningMapsUK Boundary Finder uses HM Land Registry INSPIRE Index Polygon data to help locate and visualise a registered general-boundary polygon. You search the address, select the matching property and preview the boundary before checkout.

The £24.99 report adds practical context:

• Ordnance Survey and satellite map views
• Numbered polygon points
• Coordinates, edge distances and bearings
• Map links and elevation information
• Terrain and geology context
• A 15-page guide to UK fences and boundaries

This makes the general polygon easier to inspect on site and discuss with a neighbour or professional. It does not make the INSPIRE polygon the official title plan, and it does not convert the general boundary into an exact line.

The most defensible workflow is to use Boundary Finder for orientation and practical context, then obtain the official register, plan and relevant deeds when the matter concerns ownership or legal rights.

When is a boundary exact?

Most title plans remain general. An exact line can be recorded through the determined-boundary procedure where the evidence supports it.

HM Land Registry's determined-boundary guidance explains that the application requires supporting evidence, the prescribed form and a plan prepared to the necessary standard. The neighbour has an opportunity to object, and unresolved objections may be referred to a tribunal.

The detailed practice guide for boundary agreements and determined boundaries sets strict plan requirements. A determined-boundary plan normally identifies the start, end and turning points, includes adequate surrounding detail and uses precise measurements or National Grid coordinates.

That is a different exercise from enlarging a standard title plan.

Common title-plan mistakes

“The red line is inside the fence, so the fence is not mine”

Normal red edging is often drawn inside the mapped feature so the feature remains visible. The graphic offset is not proof of a strip of unowned or neighbouring land.

“The plan says 1:1250, so I can scale it accurately”

The stated scale helps interpret the plan, but the general-boundaries rule still applies. Scale alone does not create exact legal precision.

“Satellite imagery proves the fence is off the boundary”

Aerial imagery can be offset and taken from an angle. The fence may have changed, and the boundary overlay may be general. Use imagery as supporting context.

“My title has no T-marks, so the left fence is mine”

There is no such fallback rule. Missing T-marks simply mean that the plan does not allocate responsibility that way.

“The plan and garden do not match, so Land Registry made a mistake”

Possibly, but other explanations include later fence movement, a separate title, rights over adjoining land, inaccurate occupation or an incorrectly selected property. Gather the register and deeds before seeking a correction.

“A coordinate table lets me mark the legal corners”

Coordinates derived from a general polygon describe that dataset. They are useful for finding and discussing points, not for setting out an exact legal boundary.

Which map do you actually need?

A title plan is not a planning location plan. The planning red line identifies the application site and may include access or only part of a registered title. If your end goal is planning permission, use a suitable site location plan after resolving what land the application must cover.

Read the plan for what it is

A Land Registry title plan is valuable because it identifies the registered title's general extent and connects the map to the written register. It becomes misleading only when someone asks it to provide centimetre-level certainty or fence ownership that it does not contain.

Read the register and plan together. Follow references into filed deeds. Compare the documents with both the physical site and the neighbouring title. Use Boundary Finder when you want a clearer general-boundary preview and practical report, but bring in a surveyor and solicitor when the exact legal line has to be established.