Side Extension approval rate in Northumberland

Name: Side Extension planning approval rate in Northumberland
Creator: PlanningLens
Published: 2026-09-30T18:28:47+00:00
License: https://creativecommons.org/licenses/by/4.0/

Northumberland approved 87.1% of side extension applications, based on 31 decisions analysed.

Last updated: September 2026

87.1%

side extension approval rate

Side Extension decisions

Approved

Refused

90.6%

Northumberland overall

Side Extension applications are refused more often than the Northumberland average (90.6%), suggesting the council scrutinises these projects more closely.

How side extension compares in Northumberland

Side Extension (31 decided)

87.1%

Northumberland all applications (498 decided)

90.6%

Planning a side extension in Northumberland?

87.1% get approved, but the odds vary by street. Your Full Planning Analysis shows exactly what gets approved and refused near your property.

✓ Your ward's side extension approval rate
✓ Nearest comparable side extension decisions
✓ Refusal triggers specific to your area
✓ PDF report for your architect

Free planning check for Northumberland →

Planning professional? PlanningLens runs refusal alerts and evidence packs for Northumberland and any other published UK council — see the data services →