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Rear Extension Approval Rates in Castle Point

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 1,084 real decisions tell us about rear extension outcomes in Castle Point.

1,084 real decisions·January 2020 to present·Updated June 2026
85.8%
Approval Rate
1,084
Decisions
930
Approved
154
Refused
85.8% approved. But 154 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 Castle Point: Tarpots approves 100.0% of rear extension applications while St Michael's sits at 83.3%. That 16.7% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Tarpots99
100.0%
2St. James'1111
100.0%
3Thundersley South55
100.0%
4Thundersley North1212
100.0%
5Canvey Island South77
100.0%
6Appleton98
88.9%
7St. Mary's98
88.9%
8St Michael's65
83.3%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Tarpots but just 83.3% in St Michael's.
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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 Castle Point.

TypeDecisionsRate
Conservatory233
91.8%
Front Extension174
88.5%
Side Extension583
87.3%
Garage / Parking507
86.4%
Rear Extension1,084
85.8%
Annex20
85.0%
Dormer404
84.4%
Outbuilding87
80.5%
Extension (General)104
79.8%
Hip-to-Gable Conversion118
79.7%
Loft Conversion259
79.5%
Wraparound Extension31
77.4%
New Build20
70.0%
Change of Use (Residential)54
57.4%
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What the data tells us

1
85.8% of rear extension applications in Castle Point get approved. That means 154 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 16.7% gap between Tarpots (100.0%) and St Michael's (83.3%) 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

154 rear extension applications in Castle Point 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 Castle Point planning data

Methodology: Based on 1,084 planning decisions classified as rear extensions in Castle Point, 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 Castle Point Council's public planning portal. Full methodology →
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