Is there a free map of property boundaries?
Yes, with a caveat that matters more than the map. HM Land Registry's search service on GOV.UK covers every registered title in England and Wales, on an Ordnance Survey base. Search an address or a postcode and the service will tell you whether the land is registered and give you the title number, at no charge (Search for land and property information, page updated 9 December 2024, checked 20 September 2026). A copy of the register or of the title plan is a paid download, and that download is not an official copy. For most people the free look-up is the property boundaries map they were looking for.
The caveat is the scale. The outlines are drawn on maps at 1:1250 in towns, 1:2500 in the country and 1:10000 on mountain and moorland. HM Land Registry puts the width of a drawn line at roughly 0.3 metres on the ground at 1:1250 and roughly 0.6 metres at 1:2500, in Practice Guide 40 supplement 1, checked 20 September 2026. The same guide says HM Land Registry cannot give scaled measurements from a title plan. The map cannot tell you which side of a fence post the line runs. It was never meant to.
The National Map on the OS website and various commercial apps show the same OS base without the title outlines. They are useful for finding a field or a track, and useless for a boundary.
What does the title plan actually show?
The title plan is the registered extent of one title, edged in red, on the same OS base as the map. It is bought as an official copy for the fee-order price, alone or with the register, and form OC1 is the application where you want a copy that a court will accept. The fee is set by Schedule 3 Part 2 of the Land Registration Fee Order 2024 at 7 pounds by electronic means and 11 pounds by other permitted means; an individual who is not a Land Registry account holder can only apply by post, so the 11 pound fee is the one that usually applies (Practice Guide 11, updated 11 November 2024, checked 20 September 2026). Some plans carry more than the red edge: coloured tints or hatching for land with rights over it or excluded from it, numbered points referring to entries in the register, and sometimes a T mark copied from the original conveyance to show who maintains a feature. The registry reproduces a T mark only where the deed itself refers to it in words, and says that T marks on a deed plan which the text does not mention have no special force or meaning in law and are normally ignored (Practice Guide 40 supplement 3, updated 1 June 2026, checked 20 September 2026). The mark takes its meaning from the wording of the deed, not from the plan, and the registry makes no finding about who has to repair anything.
What the plan does not carry is measurements. Where a figure appears it is copied from a deed and the register will say so. Scaling a distance off the plan with a ruler does not give you a reliable measurement, and HM Land Registry says so itself: supplement 1 to Practice Guide 40 ends its account of Ordnance Survey accuracy by saying the registry is unable to provide scaled measurements from title plans or from Ordnance Survey mapping. The accuracy it publishes is tiered rather than a single figure, better at the 1:1250 urban scale than at 1:2500. Supplement 3 adds that there is no standard tolerance, measurement or ratio between where the general boundary is mapped and where the legal boundary runs (supplements checked 20 September 2026). The plan is a picture of where the land roughly is, not a survey of where it exactly ends.
This is the general boundaries rule, in section 60 of the Land Registration Act 2002: unless a boundary has been determined, the plan shows only a general boundary and does not fix the exact line (section 60 of the Land Registration Act 2002). Reading a boundary off the plan without it leads to arguments the plan cannot settle.
| Source | Cost | What it shows | What it cannot show |
|---|---|---|---|
| HM Land Registry map search | Free | Outline of every registered title, with title numbers | The exact line; unregistered land |
| Official copy of the title plan | Fee order | The red-edged extent of one title, marks and tints | Measurements; which side of a fence the line runs |
| Filed pre-registration deed and plan | Fee order | The original conveyance plan, sometimes with dimensions | Anything the parties never drew |
| Physical features on the ground | Nothing | Fences, walls, hedges and where they have been for decades | Whether they are on the line |
| Measured survey by a boundary surveyor | Surveyor's fee | Where the deed plan falls on the ground today | Legal effect, without a determination or agreement |
| Determined boundary at HM Land Registry | Fee order plus surveyor | The exact line, fixed on the register | Only if the neighbour does not object |
How do I find the exact boundary line of my property?
Start with the deed that created the boundary, not the plan that copied it. When a plot was first sold off, the conveyance or transfer described the land, sometimes with measurements, and its plan was drawn at a larger scale than the OS base. HM Land Registry does not keep every deed the register refers to. Practice Guide 11 section 6.3.1 says so in terms: extracts are often set out in the register without the document itself being kept (updated 11 November 2024, checked 20 September 2026). Read the register you already have first, because it carries a note such as Copy filed against an entry where a copy is held, and that costs nothing. Where it is filed, an official copy is bought on form OC2 for 7 pounds by electronic means or 11 pounds by other permitted means, under Schedule 3 Part 2 to the Land Registration Fee Order 2024. Where the land was registered long ago and the deed was never filed, the paper deeds held by an owner or lender may still exist, and the unregistered land guide explains where old deeds go.
Then look at the ground. What matters is not how old a feature is but whether it was there when the plots were divided. A conveyance is read against the physical facts on the ground at its date, and a wall or hedge that was there then is evidence of where the parties meant the line to run, following Pennock v Hodgson and Alan Wibberley Building Ltd v Insley. A feature put up later evidences only what people since have believed, and what a later owner believed is not admissible to read the deed. In practice a wall that has stood a long time is often good evidence, not because age counts for itself, but because the longer it has stood the more likely it is to date from the division. To use the test you need the date of the conveyance that first split the two plots, which is why the deed comes first. Where the deed plan and the features disagree, the courts apply a set of presumptions: the hedge and ditch rule, the presumption that a road boundary runs to the middle of the road, and the presumption that a non-tidal river boundary runs to the middle of the stream. Tidal water and the foreshore run on a different presumption, in favour of the Crown. A road being maintained at public expense does not displace the road presumption, because section 263 of the Highways Act 1980 vests the surface and a working depth below it in the highway authority and leaves the subsoil with the adjoining owner. None is a rule of law. Each gives way to a clear deed.
Only then, if the answer still matters and the deeds are silent, does a surveyor come in. A boundary surveyor plots the deed plan onto a measured survey of the site today and produces a plan to a scale HM Land Registry will accept. That plan is what supports a determined boundary application on form DB, which is the boundary determination service. It fixes the exact line on both registers, provided the neighbour does not object, and it is the only way to have an exact line recorded on the register as determined under section 60. Rule 118 of the Land Registration Rules 2003 asks for the form, a plan, or a plan and a written description, identifying the exact line and showing enough surrounding physical features to place it on the Ordnance Survey map, together with evidence of that line (checked 20 September 2026). The rule does not name a chartered surveyor, but the standard the registry applies means one is needed in practice. A boundary agreement with the neighbour is the other way of settling where the line runs, and it is quicker and cheaper, but it binds the two of you rather than converting the general boundary into a determined one.
What are the common mistakes when reading a boundaries map?
The first is treating the red line as a survey. A person measures the width of their plot on the plan, scales it up, finds it a foot short on the ground and concludes the neighbour has taken a foot. The plan was never accurate to a foot. The second is reading the position of the fence as the position of the line. Fences are put up where it is convenient, inside the boundary so the builder does not trespass, or along a hedge that is itself a foot wide. A fence is evidence of where people thought the line was; it is not the line.
The third is assuming the boundary map shows everything. Unregistered land has no outline on it, so a gap between two titles on the map does not mean a gap on the ground. It means nobody has registered that strip. Our who owns this land page is where that question goes: it explains the free search that comes first and what we do when the register runs out.
The fourth is thinking that T marks decide the line. Where the deed refers to it, a T mark goes to who owns or maintains the feature; where the deed does not mention it, it has no special force in law. Either way it says nothing about where the fence should be, and a neighbour with a T mark on their side can still have built the fence a foot into your garden. The which fence is mine page deals with ownership of the feature; this guide is about where it stands.
What should I do if my neighbour disagrees about the boundary?
Talk first, with the documents. Many boundary arguments dissolve when both owners look at the filed conveyance together and see what it says. Where the deeds are ambiguous and the two of you can agree where the line is, a boundary agreement records it in a short written agreement signed by both of you, usually with a plan. An agreement that settles an unclear line binds the next owners of its own force, whether or not it ever reaches the register: the Court of Appeal held in White v Alder [2025] EWCA Civ 392 that it binds a successor even where they knew nothing about it. What recording it does is make it findable, so the next buyer's conveyancer sees it and the argument never restarts. HM Land Registry records it by altering the register to bring it up to date, entering it in the property register of each title with a copy filed (Practice Guide 40 supplement 4, updated 1 June 2026, and Schedule 4 paragraph 5 to the Land Registration Act 2002, checked 20 September 2026). Be clear which kind of agreement you are making: one that settles where an uncertain line already runs moves no land, but one that shifts the line or hands over a strip is a transfer of land, and that needs a contract, a deed, a transfer of part and a tax answer, however small the strip.
Where you cannot agree, the routes are a determined boundary application, which the neighbour can object to, or a claim in the county court. On an objection the registrar first decides whether it is groundless; if it is not, and it cannot be disposed of by agreement, section 73(7) of the Land Registration Act 2002 requires him to refer it to the Land Registration division of the Property Chamber, First-tier Tribunal (checked 20 September 2026). Both are slow and both often cost more than the strip is worth. Before either, RICS runs a Boundary Disputes Mediation Service with the Property Litigation Association. There is no pre-action protocol written for boundary disputes, but the Practice Direction on Pre-Action Conduct expects parties to have considered settling without a claim, and since Churchill v Merthyr Tydfil County Borough Council [2023] EWCA Civ 1416 a court may order them to try (checked 20 September 2026). We prepare the determination and the agreement; litigation, if it comes to that, needs a litigator, and we say so at the start. The boundaries hub sets out each route and where the line between them falls, and neighbour moved the boundary is the page for the case where the fence has already moved.