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Rear Extension Approval Rates in Bath & NE Somerset

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 5,021 real decisions tell us about rear extension outcomes in Bath & NE Somerset.

5,021 real decisions·January 2020 to present·Updated May 2026
95.1%
Approval Rate
5,021
Decisions
4,777
Approved
244
Refused
95.1% approved. But 244 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.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Combe Down55
100.0%
2Bathwick55
100.0%
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These are council averages. Your property is specific.

Two houses on the same street can get different outcomes.
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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 Bath & NE Somerset.

TypeDecisionsRate
Wraparound Extension371
96.0%
Conservatory1,211
95.8%
Rear Extension5,021
95.1%
Side Extension2,772
94.7%
Front Extension379
94.5%
Basement943
92.8%
Dormer1,881
92.1%
Extension (General)2,537
91.8%
HMO642
91.7%
Loft Conversion1,100
91.5%
Outbuilding1,793
91.2%
Garage / Parking4,823
89.4%
Change of Use (Residential)2,207
87.9%
Annex367
87.5%
Hip-to-Gable Conversion54
87.0%
Flat Conversion129
86.8%
New Build3,033
83.1%
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What the data tells us

1
95.1% of rear extension applications in Bath & NE Somerset get approved. That means 244 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

244 rear extension applications in Bath & NE Somerset 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 Bath & NE Somerset planning data

Methodology: Based on 5,021 planning decisions classified as rear extensions in Bath & NE Somerset, 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 Bath & NE Somerset Council's public planning portal. Full methodology →
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