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Rear Extension Approval Rates in Barking & Dagenham

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 2,715 real decisions tell us about rear extension outcomes in Barking & Dagenham.

2,715 real decisions·January 2020 to present·Updated March 2026
72.6%
Approval Rate
2,715
Decisions
1,970
Approved
745
Refused
72.6% approved. But 745 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 Barking & Dagenham: Chadwell Heath approves 100.0% of rear extension applications while Village sits at 33.3%. That 66.7% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Chadwell Heath1111
100.0%
2Valence76
85.7%
3Longbridge108
80.0%
4Alibon74
57.1%
5Whalebone52
40.0%
6Village62
33.3%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Chadwell Heath but just 33.3% in Village.
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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 Barking & Dagenham.

TypeDecisionsRate
Extension (General)639
90.9%
New Build910
87.8%
Garage / Parking1,336
83.3%
Conservatory162
82.7%
Basement38
76.3%
Rear Extension2,715
72.6%
Flat Conversion155
71.0%
Outbuilding429
69.7%
Change of Use (Residential)466
64.8%
Side Extension1,680
64.0%
Wraparound Extension265
62.3%
Dormer491
60.5%
Front Extension310
60.0%
Annex73
53.4%
Loft Conversion256
50.4%
Hip-to-Gable Conversion137
36.5%
HMO97
11.3%
See how this applies to your postcode →

What the data tells us

1
72.6% of rear extension applications in Barking & Dagenham get approved. That means 745 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 66.7% gap between Chadwell Heath (100.0%) and Village (33.3%) 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

745 rear extension applications in Barking & Dagenham 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 Barking & Dagenham planning data

Nearby councils rear extension data

Methodology: Based on 2,715 planning decisions classified as rear extensions in Barking & Dagenham, 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 Barking & Dagenham Council's public planning portal. Full methodology →
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