Data-backed planning intelligence · 3,290,000+ decisions analysed across England

Rear Extension Approval Rates in Bexley

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 8,118 real decisions tell us about rear extension outcomes in Bexley.

8,118 real decisions·January 2020 to present·Updated June 2026
82.8%
Approval Rate
8,118
Decisions
6,721
Approved
1,397
Refused
82.8% approved. But 1,397 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 Bexley: WHEATH approves 93.3% of rear extension applications while ESTWCK sits at 83.3%. That 10.0% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1WHEATH1514
93.3%
2BLACKF1413
92.9%
3CROOKL98
88.9%
4SIDCPN87
87.5%
5BEXHTH76
85.7%
6ESTWCK65
83.3%
See how this applies to your postcode →

These are council averages. Your property is specific.

A rear extension has a 93.3% approval rate in WHEATH but just 83.3% in ESTWCK.
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 Bexley.

TypeDecisionsRate
Conservatory533
90.6%
Basement151
87.4%
Front Extension1,122
86.6%
Garage / Parking5,016
86.2%
Side Extension3,812
86.0%
Outbuilding995
85.6%
Extension (General)1,731
85.4%
Wraparound Extension2,027
84.8%
Flat Conversion321
83.8%
Rear Extension8,118
82.8%
New Build1,507
82.7%
Annex140
81.4%
Hip-to-Gable Conversion1,121
80.3%
Dormer2,739
79.8%
Change of Use (Residential)1,298
79.5%
Loft Conversion350
77.7%
HMO287
64.5%
See how this applies to your postcode →

What the data tells us

1
82.8% of rear extension applications in Bexley get approved. That means 1,397 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 10.0% gap between WHEATH (93.3%) and ESTWCK (83.3%) 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

1,397 rear extension applications in Bexley 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 Bexley planning data

Nearby councils rear extension data

Methodology: Based on 8,118 planning decisions classified as rear extensions in Bexley, 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 Bexley Council's public planning portal. Full methodology →
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