What type of planning application is most likely to be approved in Kingston?

Basement at 82.0% based on 728 decisions.

What is hardest to get planning permission for in Kingston?

Flat Conversion at 62.8% based on 374 decisions.

How do approval rates vary by project type in Kingston?

From 82.0% (Basement) to 62.8% (Flat Conversion). What you build matters as much as where you build it.

Most Common Planning Applications in Kingston

Not all planning applications are created equal. The gap between the highest and lowest approval project type in Kingston is 19.2% — that's the difference between near-certainty and a coin flip. What you build matters as much as where you build it.

23,239 real decisions·17 project types·Updated March 2026

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All 17 project types ranked

#	Type	Decisions	Approved	Refused	Rate
1	Basement	728	597	131	82.0%
2	Extension (General)	806	653	153	81.0%
3	Wraparound Extension	747	601	146	80.5%
4	Conservatory	832	666	166	80.0%
5	Garage / Parking	4,552	3,584	968	78.7%
6	New Build	2,748	2,115	633	77.0%
7	Outbuilding	1,141	876	265	76.8%
8	Side Extension	3,340	2,554	786	76.5%
9	Annex	135	103	32	76.3%
10	Hip-to-Gable Conversion	1,720	1,311	409	76.2%
11	Change of Use (Residential)	1,375	1,045	330	76.0%
12	Dormer	3,695	2,793	902	75.6%
13	Rear Extension	7,226	5,419	1,807	75.0%
14	Loft Conversion	3,856	2,883	973	74.8%
15	Front Extension	703	521	182	74.1%
16	HMO	139	96	43	69.1%
17	Flat Conversion	374	235	139	62.8%

See how this applies to your postcode →

These are council averages. Your property is specific.

A basement application has a 82.0% approval rate. Flat Conversion? Just 62.8%.
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What the data tells us

The range is massive: 62.8% to 82.0%. Choosing the right project type — or framing your application correctly — can dramatically affect outcomes.

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.

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

4,640 planning applications in Kingston 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 Kingston planning data

Nearby councils project type rankings

Methodology: Classifies 23,239 decisions in Kingston 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 Kingston Council's public planning portal, January 2020 to present. Full methodology →