Freehold boundaries available to order with OS MasterMap®

Download your freehold boundaries now


A dataset that represents the approximate shape and location of each registered title boundary for land and property in England and Wales. Available as an extra layer to OS MasterMap® in CAD format (DWG/DXF).

Coverage: England & Wales
Formats: CAD (DWG & DXF)
Options: Colour, black & white
Printable scales: 1:100 – 1:10,000
Stated accuracy: Urban +/- 1m, rural +/- 2.5m, moorland / mountain +/- 8m
Updates: Every 6 weeks
Delivery: Within seconds of ordering
Licence options: 12 months (other options available on request)
Projection: OSGB36 geodetic datum using Transverse Mercator projection
Grid: British National Grid

Can I preview the freehold boundaries before ordering?
All the extra layers including freehold boundaries are not available for preview. You can download samples that include freehold boundaries here.

How often are the freehold boundaries updated?
The freehold boundaries are updated every 6 weeks.

What are the numbers shown on the freehold boundaries layer?
The numbers shown are the Land Registry-INSPIRE ID, which corresponds to a registered title. To obtain the title registration and plan for each polygon you can use the Land Registry-INSPIRE ID and this search engine.

What formats do you offer freehold boundaries in?
Freehold boundaries are available as an additional layer to OS MasterMap® in CAD format only (DWG & DXF formats).

What software do I need to preview and edit my freehold boundaries layer?
You need CAD software such as AutoCAD to preview and edit your DWG and DXF files. If you do not have any CAD software available you can preview CAD files using this free viewer

What is Building Height attribute in OS MasterMap®?
OS MasterMap® is a digital mapping product created by Ordnance Survey, which is the national mapping agency for Great Britain. The Building Height attribute in OS MasterMap® provides information on the height of buildings in Great Britain.

What document shows property boundaries?
Title deeds are usually used to determine a property’s boundaries along with historical images and physical ground features when needed.

What is the 7 year boundary rule in the UK?
A lot of people believe that a 7-year boundary rule exists which states that if you own a piece of land for 7 years, you have the right to file for adverse possession over it. However, this is inaccurate because in order to adversely own land, you must demonstrate that you have maintained the land in question for a minimum of 10 - 12 years, depending on whether the land is registered. While adverse possession lawsuits do entail disagreements over a boundary, they are highly specialised problems.

OS MasterMap® with Freehold Boundaries DWG
OS MasterMap® with Freehold Boundaries DXF

Practical Tools to Enhance Your MasterMap®


Auto Outline

Outline a property’s boundary on MasterMap quickly and accurately.


Additional layers to add to your OS MasterMap including contours, freehold boundaries, building heights and aerial photography.


Automatically fit MasterMap to your desired paper size and scale.


The Rectangle tool selects the portion of MasterMap that you wish to purchase. You can also use the Polygon or Set Area tools for a different shape of mapping.

Save Area

You can save MasterMap search for a future purchase and easy access using the reference name of your choice.

Snap to Point

Snap to point helps to outline a piece of your property accurately on OS MasterMap.

MasterMap’s Different Uses

The Telecoms Surveyor

‘I use MapServe to download the Ordnance Survey Mastermap in CAD format based around the mast site. I also use the preview maps and aerial photography on the site to establish access points for on-site visits.’

The Architect

‘I was previously with Promap but I switched to MapServe which is simple, quick and clear compared to the rest of the providers.’ I mainly order OS MasterMap in DWG format.

The Town Planner

‘I use MapServe's mapping service to download the OS Mastermap in DWG format based around the mast site. I also use the preview maps and aerial photography on the site to establish access points for on-site visits.’

The Transport Planning Consultant

‘I mainly use Mastermap in coloured and black and white DWG formats. I need mapping that covers ± 300 m from the site that I then upload to AutoCAD in order to create the appropriate plans.’

The Arboricultural Consultant

‘I use my integrated tree software to plot the trees and its positions and then I create different layers using the Ordnance Survey MasterMap on AutoCAD to create the reports. The plans that I get from MapServe work in correspondence with the reports that I write to my clients.’

Supported Software

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