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Rear Extension Approval Rates in Tower Hamlets

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 1,868 real decisions tell us about rear extension outcomes in Tower Hamlets.

1,868 real decisions·January 2020 to present·Updated June 2026
80.6%
Approval Rate
1,868
Decisions
1,505
Approved
363
Refused
80.6% approved. But 363 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 Tower Hamlets: Bow West approves 100.0% of rear extension applications while St Dunstans sits at 85.7%. That 14.3% gap means your postcode is one of the strongest indicators of outcome.

Rear Extension approval rate by ward

#WardDecisionsApprovedRate
1Bow West66
100.0%
2St Dunstans76
85.7%
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These are council averages. Your property is specific.

A rear extension has a 100.0% approval rate in Bow West but just 85.7% in St Dunstans.
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 Tower Hamlets.

TypeDecisionsRate
Garage / Parking1,543
92.2%
New Build805
91.8%
Conservatory124
88.7%
Basement1,692
88.2%
Extension (General)1,148
84.4%
Flat Conversion392
83.7%
Side Extension413
83.3%
Outbuilding379
82.8%
Wraparound Extension68
80.9%
Rear Extension1,868
80.6%
Change of Use (Residential)2,160
80.3%
Dormer514
78.2%
Front Extension74
75.7%
Loft Conversion1,272
75.0%
Annex24
75.0%
HMO238
50.4%
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What the data tells us

1
80.6% of rear extension applications in Tower Hamlets get approved. That means 363 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
2
Your ward matters more than you think. The 14.3% gap between Bow West (100.0%) and St Dunstans (85.7%) 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

363 rear extension applications in Tower Hamlets 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 Tower Hamlets planning data

Nearby councils rear extension data

Methodology: Based on 1,868 planning decisions classified as rear extensions in Tower Hamlets, 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 Tower Hamlets Council's public planning portal. Full methodology →
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