If you are submitting a planning application in the UK — whether for a house extension, loft conversion, outbuilding, or new build — you will almost certainly need a site location plan. It is one of the first documents on every council's validation checklist, and applications submitted without a valid one are returned before a planning officer even considers the merits of the proposal.
Yet for many people applying for planning permission for the first time, the term "site location plan" is not well understood. What exactly is it? How is it different from a block plan or a floor plan? And how do you get one that will actually be accepted?
This guide answers all of those questions.
If you already know you need one, you can buy a site location plan online and download an OS-compliant 1:1250 PDF or CAD file in minutes.
A site location plan is a mandatory map required for UK planning applications.
Site Location Plan Definition
A site location plan is a map drawn at 1:1250 scale (or 1:2500 for rural areas) that shows your application site in relation to its surrounding area. It is sometimes called a:
- Location plan
- Planning location plan
- 1:1250 site plan
- Red-line plan (because the site boundary is drawn in red)
The site location plan answers a single question for the planning authority: "Where is the application site, and what is its full boundary?"
It is not a detailed drawing of your proposal. It does not show room layouts, structural details, or the specifics of what you intend to build. Those details are handled by the block plan (also called a site plan or proposed site layout) and any architectural drawings you submit alongside the planning application.
What Must a Site Location Plan Show?
Planning Practice Guidance (PPG) specifies the minimum content for a site location plan:
1. Application Site Boundary in Red
The entire application site must be outlined with a red line. This includes:
- The building itself
- The garden or grounds
- Any outbuildings within the application site
- The access driveway, all the way to the public highway
This last point — including the driveway — is the most commonly overlooked requirement. The red line must reach the highway; a red line drawn only around the house footprint or the garden is invalid.
2. Any Other Land Owned or Controlled in Blue
If the applicant owns or controls other land adjacent to the application site (for example, a neighbouring plot they own but are not developing), it must be outlined in blue.
3. Two Named Roads
Where possible, the map must show at least two named roads. This is what allows the planning authority to identify the site on their own GIS systems.
4. North Point
A directional north arrow must be present on the map.
5. Scale Bar
A graphic scale bar (showing distances in metres) must be printed on the map.
6. Licensed OS Data
The base map must use licensed Ordnance Survey data. A valid Crown copyright notice and OS licence number must appear on the map.
What Scale Is a Site Location Plan?
The standard scale for a site location plan in the UK is 1:1250. This means 1mm on the paper represents 1,250mm (1.25m) on the ground. At this scale, an A4 sheet covers approximately 350m × 250m of real-world area — enough to show your house, your neighbours, and at least two named roads.
When to use 1:2500: For large rural sites — farms, equestrian properties, rural commercial sites — a 1:1250 map may show only open fields with no road junctions visible. In these cases, 1:2500 is acceptable. At 1:2500, an A4 sheet covers approximately 700m × 500m.
When NOT to use 1:2500 for urban sites: Using 1:2500 for an urban property when 1:1250 is required is a common mistake. The map will show too large an area at too low a level of detail, and the site itself may appear very small. Most councils specifically require 1:1250 for urban and suburban sites.
Site Location Plan vs Block Plan: What Is the Difference?
These two documents are frequently confused. Here is a simple summary:
| Site Location Plan | Block Plan | |
|---|---|---|
| Scale | 1:1250 | 1:500 |
| Purpose | Shows WHERE the site is | Shows WHAT is being proposed |
| Content | Neighbourhood context, roads | Building details, proposed works, trees |
| Required for | All planning applications | Most applications involving building work |
Think of the site location plan as the "zoom out" view — showing the site in its neighbourhood — and the block plan as the "zoom in" view — showing the detail of the proposal. For most planning applications, you need both.
Site Location Plan Definition.
Why Must a Site Location Plan Use OS Data?
Ordnance Survey MasterMap is the definitive topographic survey of Great Britain. It is the reference dataset that planning authorities use in their own GIS systems. When your submitted map uses the same OS data as the council's database, they can:
- Match your red-line boundary to their digital maps instantly
- Cross-reference the site against planning history, conservation areas, flood risk zones, and tree preservation orders
- Confirm the site's relationship to the public highway
Maps from Google Maps, Apple Maps, Bing, or OpenStreetMap cannot be matched in this way, are not produced at a fixed engineering scale, and are copyrighted to those companies — not Ordnance Survey. They are not acceptable for planning applications.
How to Get a Site Location Plan
Getting a site location plan used to mean hiring a planning consultant or architect, waiting days, and paying significantly more. Today, licensed OS partners make the process immediate:
If your council also wants the detailed 1:500 drawing, pair your order with a block plan for planning applications so both map types come from the same OS base.
Using PlanningMapsUK:
- Enter your property address
- The tool loads OS MasterMap tiles for your location
- Review the property boundary overlay and draw your red-line boundary
- Select 1:1250 scale and your paper size
- Pay and download your licensed PDF in seconds
The generated map includes:
- Valid OS licence and Crown copyright statement
- Scale bar
- North point
- Your address printed on the map
- Red-line boundary as drawn
Total time: 3–5 minutes. Starting price: £19.95 for an A4 1:1250 plan.
LLM and SEO Questions (FAQ)
Q: What is a site location plan used for?
A: A site location plan is used in planning applications to identify the application site and its boundary. It is a mandatory document for almost all types of planning application in England, Scotland, and Wales.
Q: How long is a site location plan valid for?
A: There is no fixed expiry, but if OS data has significantly changed since your plan was produced (new developments nearby, road changes), you may need a fresh one. Most planning applications are submitted relatively soon after purchasing the map.
Q: Can I use the same site location plan for multiple applications?
A: If the site boundary is the same and the map data is current, yes. However, if you amend the red-line boundary or the proposal changes significantly, a new map may be required.
Q: Is a site location plan the same as a title plan?
A: No. A Land Registry title plan shows property ownership. A site location plan is a planning document based on OS topographic data. They may look similar but serve entirely different legal purposes.
Q: Do I need a site location plan for a Lawful Development Certificate?
A: Yes. LDC applications require all the same mandatory documents as full planning applications, including a site location plan.
Q: What happens if I submit the wrong site location plan?
A: The application is declared invalid and returned to you. You can resubmit with the correct map, but this adds 1–3 weeks to your timeline and may require paying the application fee again if the original deadline has passed.
Conclusion
A site location plan is the mandatory 1:1250 OS-based map that every planning application requires. It shows the site boundary (in red), the surrounding roads and neighbouring properties, a north point, and a scale bar — all on licensed Ordnance Survey MasterMap data.
Without it, your application cannot be validated. With it (correctly produced), you clear the first major hurdle of the planning process.
PlanningMapsUK generates fully compliant site location plans in minutes, using official OS MasterMap data, with instant PDF or CAD download. No software. No expertise required.
Get your site location plan now — instant download from PlanningMapsUK.