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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 35.0% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

1,637 real decisions·14 project types·Updated August 2026
100.0%
Safest: Front Extension
65.0%
Lowest: Flat Conversion
35.0%
Spread
14
Types ranked

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All 14 project types ranked

#TypeDecisionsApprovedRefusedRate
1Front Extension32320
100.0%
2Conservatory39381
97.4%
3Wraparound Extension35332
94.3%
4Outbuilding65614
93.8%
5Garage / Parking26624422
91.7%
6Side Extension18116615
91.7%
7Dormer23521322
90.6%
8Rear Extension42238141
90.3%
9Loft Conversion1059411
89.5%
10Hip-to-Gable Conversion82739
89.0%
11Extension (General)27243
88.9%
12HMO70619
87.1%
13Change of Use (Residential)15510946
70.3%
14Flat Conversion1006535
65.0%
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 65.0%.
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What the data tells us

1
The range is massive: 65.0% 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

180 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 1,637 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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