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Rear Extension Approval Rates in Basildon

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 96 real decisions tell us about rear extension outcomes in Basildon.

96 real decisions·January 2020 to present·Updated March 2026
89.6%
Approval Rate
96
Decisions
86
Approved
10
Refused
89.6% approved. But 10 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
1Billericay East98
88.9%
2Burstead87
87.5%
3Castledon And Crouch76
85.7%
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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 Basildon.

TypeDecisionsRate
Side Extension57
91.2%
Loft Conversion21
90.5%
Rear Extension96
89.6%
Front Extension38
89.5%
Outbuilding26
88.5%
Dormer58
87.9%
Extension (General)36
86.1%
Change of Use (Residential)26
84.6%
Garage / Parking110
83.6%
New Build23
78.3%
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What the data tells us

1
89.6% of rear extension applications in Basildon get approved. That means 10 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

10 rear extension applications in Basildon 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.

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More Basildon planning data

Nearby councils rear extension data

Methodology: Based on 96 planning decisions classified as rear extensions in Basildon, 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 Basildon Council's public planning portal. Full methodology →
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