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Rear Extension Approval Rates in Winchester

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 958 real decisions tell us about rear extension outcomes in Winchester.

958 real decisions·January 2020 to August 2026·Updated August 2026
97.4%
Approval Rate
958
Decisions
933
Approved
25
Refused
97.4% approved. But 25 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 Winchester.

TypeDecisionsRate
Conservatory250
98.0%
Rear Extension958
97.4%
Side Extension561
97.1%
Hip-to-Gable Conversion31
96.8%
Wraparound Extension88
96.6%
Front Extension145
96.6%
Dormer351
95.7%
Extension (General)491
95.3%
Loft Conversion239
95.0%
Garage / Parking1,076
94.6%
Basement44
93.2%
Outbuilding392
92.9%
Annex98
92.9%
Change of Use (Residential)261
88.1%
New Build168
82.1%
See how this applies to your postcode →

What the data tells us

1
97.4% of rear extension applications in Winchester get approved. That means 25 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

25 rear extension applications in Winchester 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 3,780,000+ real decisions

More Winchester planning data

Nearby councils rear extension data

Methodology: Based on 958 planning decisions classified as rear extensions in Winchester, January 2020 to August 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 Winchester Council's public planning portal. Full methodology →
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