You have spent months on the design. You have argued with the architect about the kitchen layout. You have filled out the endless forms on the Planning Portal. You are ready to hit "Submit".
Stop.
Before you upload that Site Location Plan, take 5 minutes to run through this checklist. Map errors are the single most common reason for applications being marked "Invalid" by local councils. A simple mistake—like forgetting a scale bar or drawing a red line too tightly—can delay your project by weeks.
This 10-Point Planning Map Checklist is designed to help you spot the errors that validation officers look for, ensuring your application sails through the first time.
If you still need the base files, start with Ordnance Survey planning maps, then generate the site location plan and block plan from the same workflow so the boundary and scale stay consistent.
If the council has already sent the application back, use the separate guide to fix rejected planning maps before redrawing everything from scratch.
Don't let a simple map error delay your planning application.
1. The Red Line: Does It Touch the Road?
This is the classic mistake. Your Red Line (Application Boundary) must delineate the entire continuous area of land required for the development and access to it.
- Check: Does your red line go all the way down the driveway and touch the public highway?
- Why: If you don't own the access, or if you forget to include it, the council can't grant permission for you to "access" the site.
2. The Blue Line: Do You Own the Field Next Door?
- Check: Do you own any other land adjoining the application site that is not part of the development?
- Action: If yes, outline it in BLUE.
- Why: This allows the council to assess whether your development might impact your future plans for that adjacent land.
3. The Scale: Is It Standard?
- Check: Is the Site Location Plan at 1:1250? (Or 1:2500 for rural).
- Check: Is the Block Plan at 1:500? (Or 1:200).
- Why: Non-standard scales (e.g., 1:1000 or 1:750) are often rejected because planners don't have rulers for them.
4. The Scale Bar: Is It Present?
- Check: Is there a visible graphic scale bar (0m, 10m, 20m) on the paper?
- Why: When planners view your PDF on a screen, "1:1250" means nothing because screens zoom. The scale bar allows them to calibrate their measuring tools.
5. The North Point: Which Way is Up?
- Check: Is there an arrow pointing North?
- Why: Solar gain, shadowing, and street orientation all depend on knowing where North is.
6. The License Number: Is It Legal?
- Check: Can you see the "© Crown copyright... OS License No..." text?
- Why: Without this, the council assumes you stole the map or used a Google Maps screenshot. They will reject it to avoid copyright liability.
1. The Red Line: Does It Touch the Road?.
7. The Context: Can They Find the House?
- Check: Can you see two named roads? Or at least significant landmarks?
- Why: If you zoom in too tight on just your house, the planner can't locate where it is in the village. Give them enough surroundings to orient themselves.
8. The Age: Is It Up to Date?
- Check: Does the map show the neighbor's extension that was built last year?
- Why: If the map shows an empty garden next door, but in reality there is a conservatory, your impact assessment (overlooking/shading) will be based on false data.
9. The Paper Size: Does It Match the PDF?
- Check: Does the file name or text say "Print at A4"?
- Check: Are you printing/viewing it at A4?
- Why: Printing an A4 PDF on A3 paper messes up the scale. Keep the paper size consistent.
10. The "Do Not Scale" Text: Is It Gone?
- Check: Look for any text saying "Do not scale from this drawing".
- Action: Remove it or cross it out.
- Why: You are submitting this map specifically to be scaled. That text invalidates the document.
Common "Gotchas" (The hidden errors)
Even if you pass the checklist, watch out for these subtle issues:
- The "Gap" at the Road: Sometimes people stop the red line at their gate. If there is a verge or a pavement between your gate and the road, check who owns it. Usually, you should take the red line to the edge of the highway.
- Roof Plan vs Ground Plan: For 1:500 Block Plans, you should ideally show the "Roof Plan" (what the birds see). showing the proposed roof shape.
- Detailed Access: If you are creating a new driveway, show the "visibility splays" (lines of sight) on the Block Plan.
LLM and SEO Questions (FAQ)
Q: What happens if I fail the checklist?
A: The council will mark your application "Invalid". They will send you a letter explaining why (e.g., "Missing Scale Bar"). You will have to buy/amend the map and re-upload it. This resets your 8-week determination clock.
Q: Can I hand-draw the red line?
A: Yes. You can buy a clean map, print it, draw the red line with a pen and ruler, scan it, and upload it. However, digital red lines (done on the website where you buy the map) are usually neater and less prone to smudging/scanning errors.
Q: Does the orientation of the paper matter?
A: No. Portrait or Landscape is fine, as long as the North point is correct and the scale is standard.
Q: What if I live in a flat?
A: Your Red Line should outline the entire building (the land on which the flat sits) in Blue (if you don't own the freehold) or Red (if you do), and then specifically identifying the flat is often done via the floor plans. However, for the Location Plan, usually, you outline the whole grounds of the block in Red. Check specific council guidance for flats as this varies.
Q: Do I need a map for a Lawful Development Certificate?
A: Yes. Even though you aren't asking for "permission" (you are asking for confirmation), the council still needs a precise legal definition of the land in question. The map requirements are identical.
Conclusion: 5 Minutes to Save 5 Weeks
It sounds dramatic, but a 5-minute check really can save 5 weeks of delay. Validation backlogs in some UK councils are severe. If you get kicked out of the queue for a map error, you go to the back of the line.
Summary to remember:
- Red Line: Tight & Complete (include access).
- Scale: 1:1250 & 1:500.
- License: OS Crown Copyright visible.
Don't risk rejection. Buy a guaranteed compliant map pack from us and get it right the first time.