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Rear extension approval rates in West Northamptonshire

Rear extensions are among the most common householder applications. This page covers 97 rear extension decisions in West Northamptonshire.

97 real decisions·June 2026 to October 2026·Updated October 2026
95.9%
Approval Rate
97
Decisions
93
Approved
4
Refused
95.9% approved; 4 refused, June 2026 to October 2026. The ward figures below show where in West Northamptonshire the refusals fall.

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Why rear extension approval rates matter

Councils decide rear extensions often, so local precedent is well established. Refusals nearby form part of that precedent.

These are council averages. Your property is specific.

Two houses on the same street can get different outcomes.
Check your postcode to see what actually happens near your address.

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How rear extensions compare to other project types

Not all applications are treated equally. Here's how rear extensions stack up against other common projects in West Northamptonshire.

TypeDecisionsRate
New build20
100.0%
Outbuilding47
97.9%
Garage and parking154
96.1%
Rear extension97
95.9%
Side extension45
95.6%
Change of use (residential)42
92.9%
Other extension47
89.4%
Dormer25
80.0%
See how this applies to your postcode →

What the data tells us

1
95.9% of rear extension applications in West Northamptonshire get approved. 4 were refused, June 2026 to October 2026.
3
A council average is a starting point. Officers weigh precedent, character and the context of the street, so decisions near your property are the closer guide.

Before you spend £5,000+ on architects and drawings

PlanningLens records 4 refused rear extension applications in West Northamptonshire. The free property report shows what has been approved and refused near your address.

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More West Northamptonshire planning data

Nearby councils rear extension data

Methodology: Based on 97 planning decisions classified as rear extensions in West Northamptonshire, June 2026 to October 2026. Classification uses keyword matching against proposal descriptions (matching generate_site_data.py rules). A single application may appear in multiple categories. Approval rate = approved / (approved + refused). Pending, withdrawn and invalid applications excluded. Data from West Northamptonshire Council's public planning portal. Full methodology →
Check planning approval patterns in West Northamptonshire