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Rear Extension Approval Rates in Exeter

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 1,062 real decisions tell us about rear extension outcomes in Exeter.

1,062 real decisions·January 2020 to present·Updated June 2026
91.5%
Approval Rate
1,062
Decisions
972
Approved
90
Refused
91.5% approved. But 90 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.

Ward gap in Exeter: Heavitree approves 100.0% of rear extension applications while Duryard And St James sits at 75.0%. That 25.0% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Heavitree66
100.0%
2Topsham108
80.0%
3Duryard And St James86
75.0%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Heavitree but just 75.0% in Duryard And St James.
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 Exeter.

TypeDecisionsRate
Conservatory176
92.6%
Rear Extension1,062
91.5%
Extension (General)488
91.2%
Outbuilding297
91.2%
Dormer425
89.4%
Wraparound Extension57
87.7%
Garage / Parking804
86.8%
Loft Conversion265
86.4%
Change of Use (Residential)364
86.0%
Hip-to-Gable Conversion71
85.9%
Front Extension59
84.7%
Side Extension419
83.3%
HMO236
83.1%
Basement79
81.0%
Flat Conversion45
75.6%
Annex54
74.1%
New Build67
71.6%
See how this applies to your postcode →

What the data tells us

1
91.5% of rear extension applications in Exeter get approved. That means 90 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 25.0% gap between Heavitree (100.0%) and Duryard And St James (75.0%) means your postcode is one of the strongest indicators of outcome.
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

90 rear extension applications in Exeter 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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More Exeter planning data

Nearby councils rear extension data

Methodology: Based on 1,062 planning decisions classified as rear extensions in Exeter, 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 Exeter Council's public planning portal. Full methodology →
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