What is the planning approval rate in Northumberland?

91.1% of householder planning applications were approved in Northumberland over 2025 Q2 to 2026 Q1, from 846 decisions. 75 were refused. These are the council's own statutory returns, not an estimate. Most people guess far lower, which is why plenty of good projects never get submitted at all.

Do I need planning permission for an extension in Northumberland?

Often not. Many single storey rear extensions fall under permitted development, a national grant of permission you do not apply for. Article 4 directions in parts of Northumberland remove that, though. The Project Calculator will tell you which side of the line your project sits on in about a minute.

How long does planning permission take in Northumberland?

95.4% of householder decisions here were made within the eight week target, comfortably ahead of the national picture. Add three to six weeks before that for survey, design and validation. Realistically, expect twelve to eighteen weeks from first call to a decision you can build from.

Is there an Article 4 direction in Northumberland?

Yes. 6 directions are published for Northumberland on the government Planning Data platform. Check whether your address falls inside one before you spend anything on design.

How many applications get refused in Northumberland?

8.9%, or 75 in the year. Refusals almost always come down to depth, bulk, overlooking, or a design that reads as bolted on rather than part of the house. Nearly all of them can be built in some form after a redesign.

Northumberland Planning Permission: 91.1% Approval Rate (2026)

What the numbers actually say

Householder planning in Northumberland is far more predictable than most people assume. Over 2025 Q2 to 2026 Q1 the council decided 846 householder applications and approved 91.1%. 75 were refused. That puts it 11 of 12 in North East on approval rate.

Speed is the other half of the story. 95.4% of those decisions landed inside the eight week statutory target, comfortably ahead of the national picture.

Permitted development here

Northumberland has 6 Article 4 directions published on the government Planning Data platform. Inside those boundaries permitted development is withdrawn, so work that would be automatic elsewhere needs a full application.

70 conservation areas are mapped in Northumberland. Inside one you lose roof extensions under Class B entirely, and you lose the larger rear extension route.

The route most people miss

16 larger householder extension applications were made here in the year. That is the prior approval route which lets a terraced or semi detached house go beyond three metres without a full application, and 93.8% of them got through. It is a genuinely usable route and most homeowners have never heard of it.

Project Calculator

What can you build in Northumberland?

The rules above are the council's. The Project Calculator applies them to your house: pick the type, drag the extension, and get a verdict and a cost for your postcode.

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