Data-backed planning intelligence · 3,420,000+ decisions analysed across England

Rear Extension Approval Rates in Westmorland and Furness

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 3,048 real decisions tell us about rear extension outcomes in Westmorland and Furness.

3,048 real decisions·January 2020 to present·Updated July 2026
95.5%
Approval Rate
3,048
Decisions
2,911
Approved
137
Refused
95.5% approved. But 137 refused since 2020. Each refusal cost the homeowner time and money on drawings and application fees. Understanding your local data before you apply is the difference between confidence and a costly gamble.

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Why rear extension approval rates matter

Rear extensions sit in the middle of the pack nationally. They're common enough that councils have clear precedent — but that cuts both ways. If your neighbours have been refused, that precedent works against you too.

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 Westmorland and Furness.

TypeDecisionsRate
Side Extension1,955
96.9%
Wraparound Extension181
96.7%
Conservatory2,026
96.5%
Extension (General)8,899
95.5%
Rear Extension3,048
95.5%
Front Extension428
94.2%
Outbuilding2,068
93.8%
Dormer974
93.6%
Basement139
93.5%
Garage / Parking6,200
92.9%
Flat Conversion268
91.4%
Loft Conversion168
90.5%
Change of Use (Residential)3,689
90.2%
Annex474
89.7%
New Build2,049
84.9%
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What the data tells us

1
95.5% of rear extension applications in Westmorland and Furness get approved. That means 137 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
3
Council averages are starting points, not guarantees. The decisions that matter most are the comparable ones near your specific property — because planning officers look at precedent, character and the immediate context of your street.

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

137 rear extension applications in Westmorland and Furness have been refused since 2020. Many of those homeowners had already paid for drawings and application fees. A free, property-specific report shows you what gets approved — and what gets refused — near your property.

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Free · Property report emailed in minutes · Based on 3,420,000+ real decisions

More Westmorland and Furness planning data

Methodology: Based on 3,048 planning decisions classified as rear extensions in Westmorland and Furness, January 2020 to present. 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 Westmorland and Furness Council's public planning portal. Full methodology →
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