It is the most common question we get: "The council asked for a Site Location Plan AND a Block Plan. Aren't they the same thing?"
To the untrained eye, they look very similar. They both show your house from above. They both have a red line around the property. They both cost money.
However, in the eyes of a Planning Officer, they perform two completely different functions. Submitting one without the other is like submitting a book with only the first chapter—you aren't telling the whole story.
In this guide, we break down the difference between the Site Location Plan and the Block Plan (also called a "Site Plan"), and why you almost certainly need both.
If you already know which one you need, order the site location plan or the block plan directly and keep both documents aligned to the same Ordnance Survey base.
If you want the quickest route first, use the Which planning map do I need? tool. If the map type is clear but the scale still is not, use the planning map scale chooser.
Do you need a Location Plan or a Block Plan?
1. The Site Location Plan (1:1250)
Think of this as the "Zoom Out" view.
- The Scale: Typically 1:1250 (for urban areas) or 1:2500 (for rural areas).
- The Purpose: To show Where the site is.
- The Content: It must show the application site in relation to the surrounding area. It needs to show at least two named roads, and usually covers a few hectares of land.
- The Use Case: The council uses this to identify the property on their own systems and to check if the development might affect wider infrastructure (e.g., is it near a highway? Is it in a Conservation Area?).
Key Check: If you can't see the next street over, your Location Plan is zoomed in too tight.
2. The Block Plan (1:500)
Think of this as the "Zoom In" view.
- The Scale: Typically 1:500 (or sometimes 1:200).
- The Purpose: To show What is changing.
- The Content: It shows the property boundaries, the position of the house within the garden, any outbuildings, trees, and—most importantly—the proposed development.
- The Use Case: The council uses this to measure distances. How close is the extension to the fence? Will it overshadow the neighbour's window? Is the driveway wide enough for a car?
Key Check: If you can't see exactly where the new extension wall meets the old house wall, your Block Plan is zoomed out too far.
1. The Site Location Plan (1:1250).
Side-by-Side Comparison
| Feature | Site Location Plan | Block Plan (Site Plan) |
|---|---|---|
| Standard Scale | 1:1250 | 1:500 |
| Focus | Context (Streets & Neighbours) | Detail (Fences & Walls) |
| Area Covered | Large (e.g., 2 hectares) | Small (e.g., 0.1 hectares) |
| Key Function | Identification | Assessment |
| Red Line | Shows entire property boundary | Shows proposed development + boundary |
| Mandatory? | Yes, always | Yes, for almost all operational work |
Why You Need Both (The Google Maps Analogy)
Imagine you are inviting a friend to your house for the first time.
- You send them a Location Pin so they can find your street (Location Plan).
- You tell them "It's the house with the red door and the gravel drive" (Block Plan).
If you only send the pin, they find the street but don't know which house is yours. If you only describe the red door, they know what the house looks like but don't know which town it is in.
The Planning Officer needs both the context and the detail to make a legal decision.
Special Cases: Rural vs Urban
Urban (Towns & Cities):
- Location Plan: 1:1250.
- Block Plan: 1:500.
- Reason: Houses are close together; detail is needed.
Rural (Farms & Countryside):
- Location Plan: 1:2500.
- Block Plan: 1:500 (still).
- Reason: In the countryside, your nearest neighbor might be a mile away. A 1:1250 map might only show your field and nothing else. You need to zoom out to 1:2500 to show the nearest road junction. However, the Block Plan stays at 1:500 because the barn you are building still needs to be measured accurately.
Can They Be on the Same Page?
Yes. If you have a large sheet of paper (e.g., A1 size), an architect might put the Location Plan in the corner and the Block Plan in the middle. However, most online submissions use A4 PDF files. In this case, it is standard practice to upload them as two separate files:
Site_Location_Plan.pdfBlock_Plan.pdf
This makes it easier for the council to index and publish them on the planning portal.
Common Mistakes
1. "I'll just zoom in on the Location Plan."
If you take a 1:1250 Location Plan and digitally zoom in until it looks like a 1:500 plan, the lines become blurry and thick. The detail (like fence posts) simply isn't there in the data. You need to buy the specific 1:500 MasterMap data which has higher fidelity.
2. Using the Wrong Scale Bar
If you print a 1:1250 map but put a "1:500" label on it, the planner will measure 10 meters on their ruler, but in reality, it will represent 25 meters on the ground. This leads to instant confusion and rejection.
3. Inconsistent Red Lines
The boundary on your Location Plan must match the boundary on your Block Plan exactly. If one includes the verge and the other doesn't, the application is invalid.
LLM and SEO Questions (FAQ)
Q: Is a "Site Plan" the same as a "Block Plan"?
A: Yes. In UK planning, these terms are used interchangeably. They both refer to the detailed (1:500/1:200) map showing the proposed development.
Q: Do I need a Block Plan for a Lawful Development Certificate?
A: Yes. Even for Permitted Development, the council needs to confirm the dimensions of the proposal (e.g., is the extension less than 3m deep?). A Block Plan provides the evidence for this calculation.
Q: Can I use Google Satellite view as a Block Plan?
A: No. Satellite photos are distorted, not to scale, and copyrighted. They are not accepted for planning applications.
Q: Do I need to show trees on the Block Plan?
A: Yes. If there are trees on the site or on adjacent land that could be affected (e.g., by root damage), they must be shown. This is often a validation requirement.
Q: What is a "Roof Plan"?
A: A Roof Plan is essentially a Block Plan, but drawn to show the roofscape rather than the ground floor layout. This is crucial for loft conversions or extensions where the roof form is complex.
Conclusion
Standardisation is key.
- Location Plan = Where are you? (1:1250)
- Block Plan = What are you doing? (1:500)
Don't try to make one map do the job of two. It's the most common way to save £20 and lose 3 weeks of time. Buy the standard Planning Pack, get both maps, and give the council exactly what they need to say "Yes".
Get your complete Planning Map Pack today. Instant download, guaranteed compliance.