Data-backed planning intelligence · 2,500,000+ decisions analysed across England

Rear Extension Approval Rates in Cotswold

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 2,282 real decisions tell us about rear extension outcomes in Cotswold.

2,282 real decisions·January 2020 to present·Updated March 2026
95.6%
Approval Rate
2,282
Decisions
2,181
Approved
101
Refused
95.6% approved. But 101 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.

Check Planning Approval Patterns in Cotswold

See your ward's approval rate and nearby planning decisions — free and instant.

Check My Postcode

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.

Check My Postcode

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 Cotswold.

TypeDecisionsRate
Conservatory478
98.5%
Outbuilding1,896
97.0%
Basement105
96.2%
Side Extension1,238
95.8%
Rear Extension2,282
95.6%
Wraparound Extension218
95.4%
Front Extension276
95.3%
Annex376
94.7%
Loft Conversion226
94.7%
Garage / Parking3,246
94.6%
Extension (General)2,090
94.6%
Dormer687
93.3%
Change of Use (Residential)1,118
91.5%
New Build1,778
89.9%
Flat Conversion26
80.8%
See how this applies to your postcode →

What the data tells us

1
95.6% of rear extension applications in Cotswold get approved. That means 101 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

101 rear extension applications in Cotswold have been refused since 2020. Many of those homeowners had already paid for drawings and application fees. A £79 report shows you what gets approved — and what gets refused — near your property.

Check My Postcode First
Free instant check · Pro Report £79 · Based on 2,500,000+ real decisions

More Cotswold planning data

Nearby councils rear extension data

Methodology: Based on 2,282 planning decisions classified as rear extensions in Cotswold, 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 Cotswold Council's public planning portal. Full methodology →
Check planning approval patterns in Cotswold — Free