How to produce a valid site location plan

A site location plan is the drawing that tells the council exactly which piece of ground your application covers, and it is the single most common reason a householder application is returned as invalid. The national requirement is simple enough: every application must include a plan identifying the land to which it relates. What trips people up is the detail around it, because councils expect a recognised scale, a north point, identifiable features and a red line that matches the ownership certificates on the form.

Get it right once and you can reuse the same plan for building regulations, for a lawful development certificate and for any later application on the same site.

What the validation requirements actually ask for

Article 7 of the Town and Country Planning (Development Management Procedure) (England) Order 2015 requires a plan identifying the land. Councils translate that into a local validation list, and almost all of them ask for the same things.

A location plan at 1:1250 for most sites, or 1:2500 where the site is larger. It should show the site in its surroundings, including at least two named roads, so that an officer who has never been there can find it. A north point. A scale bar or a stated scale. The application site edged in red, and any other land in the applicant's control edged in blue.

Alongside it most councils want a block plan, sometimes called a site plan, at 1:100, 1:200 or 1:500, showing the proposal in relation to boundaries, trees and neighbouring buildings.

Scale, north point and identifiable features

Scale is not decoration. An officer measuring a distance off the drawing needs it to be true, and a plan printed to fit a page is no longer at the scale written on it. Print at the stated size, usually A4 or A3, and include a scale bar so that any reduction is still readable.

North should point up the page unless there is a good reason otherwise. Where the site is on a corner, name both roads. Where it is in a terrace, put the house number on the drawing rather than leaving the officer to count doors.

Rural sites are harder. A field with no address needs a landmark: a named lane, a watercourse, a junction. If a public footpath crosses or bounds the site, show it, because the highway authority will be consulted and its response is quicker when the route is already drawn. Our note on checking the definitive map explains where to find the line that counts.

Drawing the red line

The red line encloses all the land needed to carry out the development. Not the house. Not the garden. The land needed.

For a rear extension on a semi, that is usually the whole curtilage of the property, because materials will be stored and scaffolding erected within it. For a new dwelling on a plot, it includes the plot, the access from the public highway, and anything else physically required, such as a turning head or a visibility splay.

If the access runs over a strip you do not own, that strip still goes inside the red line, and you serve notice on its owner. Leaving it out to avoid the paperwork is the mistake that costs three weeks.

Where drainage has to cross third-party land to reach a sewer, the same logic applies, and the connection point is worth confirming before the line is drawn. Sewer records are straightforward to order, as our piece on pre-development enquiries sets out.

The blue line

The blue line marks other land that the applicant owns or controls near to or adjoining the site, but which is not part of the application. It matters more than people assume, because it tells the officer whether a refusal can simply be redrawn on the adjoining field next year.

On a householder application the blue line is usually absent, because the whole property is inside the red line. On a plot sale from a larger garden, the retained garden goes in blue. On a farm, the rest of the holding goes in blue.

Owning nothing else nearby means no blue line at all. That is a perfectly normal answer.

Red line errors that cause invalidation

1. The line follows the fence rather than the legal boundary, so part of the drive sits outside the site.
2. The access track is excluded, so the plan shows a house with no lawful way to reach it.
3. The red line covers a neighbour's garden because the base map is out of date after a boundary was moved.
4. Red and blue lines overlap, which is never correct. Land is either in the application or it is not.
5. The line is drawn on an aerial photograph with no scale, so nothing can be measured from it.
6. The red line on the location plan and the one on the block plan enclose different areas.

Any one of these will usually produce an invalidity letter rather than a refusal, which means the clock has not even started.

Licensing, and why a screenshot is not accepted

Large-scale mapping of the kind a 1:1250 plan needs is licensed data. A screen grab from a mapping website or a satellite view is neither licensed for this purpose nor accurate enough to scale from, and most councils reject it on sight.

The routes that work are buying a location plan from a licensed mapping supplier, using a plan prepared by an architect or surveyor who holds a licence, or, where an authority offers it, purchasing a plan through the council's own service. Some open mapping products are published under the Open Government Licence and can be used freely, but they are generally not detailed enough to serve as a 1:1250 location plan, so check before you rely on one.

Land Registry title plans are not a substitute either. They show the general extent of a registered title, not the application site, and they are not drawn to a planning scale.

Matching the plan to the ownership certificates

The red line and the certificate on the application form have to agree. Section 65 of the Town and Country Planning Act 1990 and the 2015 Order require an applicant to certify the ownership position and, where they are not the sole owner, to serve notice on everyone else with an interest.

Certificate A is for a sole owner of all the land in the red line. Certificate B is used where notice has been served on other owners, and an owner here includes a leaseholder with at least seven years unexpired. Certificates C and D cover cases where some or all owners cannot be traced after reasonable enquiry.

Signing the wrong certificate is an offence, and a permission granted on a false certificate is vulnerable. The practical discipline is to draw the red line first, list every title it touches, and then choose the certificate.

Checking before you submit

Lay the location plan, the block plan and the application form side by side. Confirm the red line encloses the same land on both drawings. Confirm the certificate matches the titles inside that line. Confirm the scale, the north point and the drawing number, because councils refer to drawings by number in conditions and an unnumbered plan cannot be conditioned.

Then check the constraints the line touches, because they decide which supporting documents the council will expect. A red line crossing a flood zone brings a flood risk assessment into play, and one inside a conservation area usually brings a heritage document with it.

Once the boundary is settled, enter the postcode on PlanScope to see which of the 66 reports a site of that type and location is likely to need.

This is general guidance, not legal advice. Check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.