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Rear Extension Approval Rates in Chichester

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 694 real decisions tell us about rear extension outcomes in Chichester.

694 real decisions·January 2020 to September 2026·Updated September 2026
94.8%
Approval Rate
694
Decisions
658
Approved
36
Refused
94.8% approved. But 36 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 Chichester.

TypeDecisionsRate
Conservatory176
97.7%
Front Extension103
96.1%
Side Extension379
95.0%
Rear Extension694
94.8%
Wraparound Extension60
93.3%
Extension (General)315
91.1%
Outbuilding339
89.7%
Loft Conversion85
89.4%
Dormer272
89.0%
Garage / Parking770
88.6%
Annex93
80.6%
New Build177
77.4%
Change of Use (Residential)260
75.8%
See how this applies to your postcode →

What the data tells us

1
94.8% of rear extension applications in Chichester get approved. That means 36 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

36 rear extension applications in Chichester 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 3,840,000+ real decisions

More Chichester planning data

Methodology: Based on 694 planning decisions classified as rear extensions in Chichester, January 2020 to September 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 Chichester Council's public planning portal. Full methodology →
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