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Rear Extension Approval Rates in Broads Authority

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 84 real decisions tell us about rear extension outcomes in Broads Authority.

84 real decisions·January 2020 to present·Updated June 2026
96.4%
Approval Rate
84
Decisions
81
Approved
3
Refused
96.4% approved. But 3 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 Broads Authority.

TypeDecisionsRate
Side Extension34
100.0%
Outbuilding185
97.3%
Extension (General)174
97.1%
Rear Extension84
96.4%
Conservatory40
95.0%
Garage / Parking167
91.6%
Dormer25
88.0%
New Build33
87.9%
Change of Use (Residential)79
87.3%
Annex33
84.8%
See how this applies to your postcode →

What the data tells us

1
96.4% of rear extension applications in Broads Authority get approved. That means 3 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

3 rear extension applications in Broads Authority 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 Broads Authority planning data

Methodology: Based on 84 planning decisions classified as rear extensions in Broads Authority, 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 Broads Authority Council's public planning portal. Full methodology →
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