A title plan is a small-scale official extract. It is very good at telling you which parcel is which. It is a poor instrument for arguing about a patio. This note is for England and Wales unless we say otherwise; Glasgow and the rest of Scotland sit with Registers of Scotland and need a different conversation.
General boundaries, said plainly
HM Land Registry is clear that most titles show a general boundary. The red line is not a millimetre-true fence. Zooming a PNG until the pixels look like a wall is not a survey. If you need occupation, commission a boundary survey or a title support drawing that starts from the ground.
Scale is the quiet villain. A line a millimetre wide on a 1:1250 plan is a wide band in a London side return. Anyone who tells you they “proved” a boundary from the title plan alone is selling certainty the paper does not contain.
What a measured overlay is for
We measure fences, walls and buildings, then show the registered geometry on the same sheet. Sometimes they agree. Sometimes a historic transfer left a strip that everyone has treated as a drive. The drawing should make that visible without theatrical arrows. Your conveyancer still lodges anything that needs lodging.
A topo can carry the overlay as a layer. A standalone legal sheet is better when the only audience is a solicitor. Do not issue a design file that quietly contains a legal opinion in layer 0.
Leases and first registrations
Lease plans and transfers of part have their own manners. They need a measured base and a demise that a registry officer can index. A floor in a Birmingham warehouse is a building job as much as a land job. Read the product page before you ask for “something that looks official”.
National mapping still sits underneath. Plans that ignore Ordnance Survey detail look “off” to people who read them for a living. That is not snobbery; it is how indexing works.
Official copies, not screenshots
If you are going to overlay title, use official copies with a date, not a screenshot from a portal you cannot name. The geometry still has scale limits. The date still matters if a transfer has happened since. We can obtain copies where you ask; many solicitors already hold them and should attach them to the brief.
Index maps tell you which titles sit nearby. They do not tell you where the fence is. A boundary survey still has to walk. If the site is a development assembly, overlay every title you think you are buying, not only the pretty one in the brochure.
When to stop zooming and start measuring
Stop zooming when the argument is about less than the width of the line. Start measuring when someone is about to build, sell, or write a letter. A support drawing is the product if a conveyancer needs a sheet. A topo with an overlay is the product if a designer needs to see the mismatch. They are not interchangeable names for the same PDF.
Scotland again: do not force this article onto a Glasgow close. Start at the Glasgow page and talk to a solicitor who works there.
A last pass before you hit send
Attach official copies, not screenshots. Say whether you need a support plan or a boundary narrative. Stop zooming when the argument is thinner than the line. Scotland is not a footnote — start in Glasgow if that is the land.
If you want the product rather than the essay, start at topographical surveys or the contact form. The phone and inbox on this site are temporary; the brief you type is the reliable object.