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Rear Extension Approval Rates in Tonbridge & Malling

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 1,502 real decisions tell us about rear extension outcomes in Tonbridge & Malling.

1,502 real decisions·January 2020 to present·Updated May 2026
92.9%
Approval Rate
1,502
Decisions
1,395
Approved
107
Refused
92.9% approved. But 107 refused since 2020. Each refusal cost the homeowner time and money on drawings and application fees. Understanding your local data before you apply is the difference between confidence and a costly gamble.

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Why rear extension approval rates matter

Rear extensions sit in the middle of the pack nationally. They're common enough that councils have clear precedent — but that cuts both ways. If your neighbours have been refused, that precedent works against you too.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Vauxhall66
100.0%
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These are council averages. Your property is specific.

Two houses on the same street can get different outcomes.
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How rear extensions compare to other project types

Not all applications are treated equally. Here's how rear extensions stack up against other common projects in Tonbridge & Malling.

TypeDecisionsRate
Conservatory306
95.4%
Rear Extension1,502
92.9%
Flat Conversion21
90.5%
Wraparound Extension182
90.1%
Side Extension870
89.9%
Extension (General)525
88.8%
Front Extension220
88.2%
Change of Use (Residential)334
88.0%
Loft Conversion295
87.5%
Basement64
85.9%
Garage / Parking1,868
85.5%
Outbuilding505
85.1%
Hip-to-Gable Conversion53
84.9%
New Build391
84.4%
Dormer448
83.7%
Annex137
80.3%
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What the data tells us

1
92.9% of rear extension applications in Tonbridge & Malling get approved. That means 107 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
3
Council averages are starting points, not guarantees. The decisions that matter most are the comparable ones near your specific property — because planning officers look at precedent, character and the immediate context of your street.

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

107 rear extension applications in Tonbridge & Malling 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 Tonbridge & Malling planning data

Nearby councils rear extension data

Methodology: Based on 1,502 planning decisions classified as rear extensions in Tonbridge & Malling, January 2020 to present. Classification uses keyword matching against proposal descriptions (matching generate_site_data.py rules). A single application may appear in multiple categories. Approval rate = approved / (approved + refused). Pending, withdrawn and invalid applications excluded. Data from Tonbridge & Malling Council's public planning portal. Full methodology →
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