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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 4,724 real decisions tell us about rear extension outcomes in Barking & Dagenham.

4,724 real decisions·January 2020 to present·Updated June 2026
75.5%
Approval Rate
4,724
Decisions
3,565
Approved
1,159
Refused
75.5% approved. But 1,159 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: Longbridge approves 100.0% of rear extension applications while Goresbrook 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
1Longbridge88
100.0%
2Chadwell Heath76
85.7%
3Becontree54
80.0%
4Parsloes53
60.0%
5Eastbury53
60.0%
6Whalebone52
40.0%
7Goresbrook62
33.3%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Longbridge but just 33.3% in Goresbrook.
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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
Rear Extension4,724
75.5%
Conservatory125
73.6%
Extension (General)228
69.7%
Outbuilding475
68.2%
Garage / Parking716
66.1%
Wraparound Extension245
60.0%
Dormer466
55.8%
Side Extension1,481
54.3%
Front Extension333
51.7%
Loft Conversion257
45.9%
New Build193
42.0%
Hip-to-Gable Conversion148
39.9%
Annex61
37.7%
Change of Use (Residential)422
37.4%
Flat Conversion76
34.2%
HMO136
5.9%
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What the data tells us

1
75.5% of rear extension applications in Barking & Dagenham get approved. That means 1,159 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 Longbridge (100.0%) and Goresbrook (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

1,159 rear extension applications in Barking & Dagenham 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 Barking & Dagenham planning data

Nearby councils rear extension data

Methodology: Based on 4,724 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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