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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 42.6% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

587 real decisions·10 project types·Updated March 2026
90.0%
Safest: Outbuilding
47.4%
Lowest: Flat Conversion
42.6%
Spread
10
Types ranked

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All 10 project types ranked

#TypeDecisionsApprovedRefusedRate
1Outbuilding30273
90.0%
2Side Extension826913
84.1%
3Rear Extension15112625
83.4%
4Garage / Parking947816
83.0%
5Dormer745618
75.7%
6Loft Conversion31238
74.2%
7Hip-to-Gable Conversion27207
74.1%
8HMO21138
61.9%
9Change of Use (Residential)583127
53.4%
10Flat Conversion381820
47.4%
See how this applies to your postcode →

These are council averages. Your property is specific.

A outbuilding application has a 90.0% approval rate. Flat Conversion? Just 47.4%.
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What the data tells us

1
The range is massive: 47.4% to 90.0%. 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

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

Nearby councils project type rankings

Methodology: Classifies 587 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 present. Full methodology →
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