Data-backed planning intelligence · 2,500,000+ decisions analysed across England

Most Common Planning Applications in Swansea

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Swansea is 41.2% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

2,873 real decisions·10 project types·Updated March 2026
91.2%
Safest: Extension (General)
50.0%
Lowest: Loft Conversion
41.2%
Spread
10
Types ranked

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All 10 project types ranked

#TypeDecisionsApprovedRefusedRate
1Extension (General)68626
91.2%
2Conservatory13711720
85.4%
3Outbuilding53458
84.9%
4Rear Extension604500104
82.8%
5Garage / Parking34428262
82.0%
6Side Extension37930772
81.0%
7Change of Use (Residential)816516
80.2%
8Front Extension745717
77.0%
9Dormer1207644
63.3%
10Loft Conversion542727
50.0%
See how this applies to your postcode →

These are council averages. Your property is specific.

A extension (general) application has a 91.2% approval rate. Loft Conversion? Just 50.0%.
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What the data tells us

1
The range is massive: 50.0% to 91.2%. 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

399 planning applications in Swansea 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 Swansea planning data

Nearby councils project type rankings

Methodology: Classifies 2,873 decisions in Swansea 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 Swansea Council's public planning portal, January 2020 to present. Full methodology →
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