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Rear Extension Approval Rates in Gravesham

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 345 real decisions tell us about rear extension outcomes in Gravesham.

345 real decisions·January 2020 to present·Updated June 2026
75.1%
Approval Rate
345
Decisions
259
Approved
86
Refused
75.1% approved. But 86 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.

Ward gap in Gravesham: Coldharbour And Perry Street approves 100.0% of rear extension applications while Woodlands sits at 40.0%. That 60.0% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Coldharbour And Perry Street55
100.0%
2Istead Rise, Cobham And Luddesdown55
100.0%
3Meopham North54
80.0%
4Northfleet And Springhead54
80.0%
5Higham And Shorne97
77.8%
6Whitehill And Windmill Hill75
71.4%
7Woodlands104
40.0%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Coldharbour And Perry Street but just 40.0% in Woodlands.
Check your postcode to see what actually happens near your address.

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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 Gravesham.

TypeDecisionsRate
Conservatory48
85.4%
Outbuilding83
78.3%
Hip-to-Gable Conversion23
78.3%
Extension (General)71
77.5%
Loft Conversion41
75.6%
Rear Extension345
75.1%
Change of Use (Residential)72
75.0%
Garage / Parking279
74.9%
Dormer119
74.8%
Front Extension46
71.7%
Side Extension153
70.6%
New Build59
69.5%
Annex24
62.5%
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What the data tells us

1
75.1% of rear extension applications in Gravesham get approved. That means 86 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 60.0% gap between Coldharbour And Perry Street (100.0%) and Woodlands (40.0%) means your postcode is one of the strongest indicators of outcome.
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

86 rear extension applications in Gravesham 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 Gravesham planning data

Methodology: Based on 345 planning decisions classified as rear extensions in Gravesham, 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 Gravesham Council's public planning portal. Full methodology →
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