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Most Common Planning Applications in Southend-on-Sea

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Southend-on-Sea is 34.0% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

1,683 real decisions·14 project types·Updated August 2026
100.0%
Safest: Front Extension
66.0%
Lowest: Flat Conversion
34.0%
Spread
14
Types ranked

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All 14 project types ranked

#TypeDecisionsApprovedRefusedRate
1Front Extension34340
100.0%
2Conservatory41401
97.6%
3Outbuilding70664
94.3%
4Wraparound Extension37343
91.9%
5Garage / Parking27425123
91.6%
6Side Extension18917217
91.0%
7Dormer24021723
90.4%
8Rear Extension43339043
90.1%
9Loft Conversion1089711
89.8%
10Extension (General)28253
89.3%
11Hip-to-Gable Conversion83749
89.2%
12HMO70619
87.1%
13Change of Use (Residential)16011446
71.2%
14Flat Conversion1036835
66.0%
See how this applies to your postcode →

These are council averages. Your property is specific.

A front extension application has a 100.0% approval rate. Flat Conversion? Just 66.0%.
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What the data tells us

1
The range is massive: 66.0% to 100.0%. Choosing the right project type — or framing your application correctly — can dramatically affect outcomes.
2
Visibility drives scrutiny. Project types that change the external appearance — dormers, loft conversions, hip-to-gable — face more resistance than those that don't. The more visible your proposal, the more carefully it needs designing.
3
These are council-wide averages. Your ward, your street and your immediate neighbours all shift the odds. The comparable decisions near your property are the best indicator of outcome.

Before you spend £5,000+ on architects and drawings

183 planning applications in Southend-on-Sea 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 Southend-on-Sea planning data

Nearby councils project type rankings

Methodology: Classifies 1,683 decisions in Southend-on-Sea into residential project types using keyword matching against proposal descriptions (matching generate_site_data.py subtype rules). A single application may appear in multiple categories. Data from Southend-on-Sea Council's public planning portal, January 2020 to August 2026. Full methodology →
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