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Rear Extension Approval Rates in Thurrock

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 3,721 real decisions tell us about rear extension outcomes in Thurrock.

3,721 real decisions·January 2020 to September 2026·Updated September 2026
79.1%
Approval Rate
3,721
Decisions
2,943
Approved
778
Refused
79.1% approved. But 778 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.

These are council averages. Your property is specific.

Two houses on the same street can get different outcomes.
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 Thurrock.

TypeDecisionsRate
Conservatory318
86.2%
Extension (General)312
85.6%
Garage / Parking2,109
82.2%
Hip-to-Gable Conversion424
80.4%
Rear Extension3,721
79.1%
Outbuilding737
78.7%
Loft Conversion1,344
78.3%
Basement36
77.8%
Annex190
77.4%
Dormer1,431
77.3%
Front Extension412
77.2%
Side Extension1,562
77.0%
New Build424
75.2%
Change of Use (Residential)651
74.5%
Wraparound Extension315
74.3%
HMO76
72.4%
Flat Conversion73
67.1%
See how this applies to your postcode →

What the data tells us

1
79.1% of rear extension applications in Thurrock get approved. That means 778 homeowners since 2020 have been refused. Not terrible odds, but not a foregone conclusion.
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

778 rear extension applications in Thurrock 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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Free · Property report emailed in minutes · Based on 3,840,000+ real decisions

More Thurrock planning data

Nearby councils rear extension data

Methodology: Based on 3,721 planning decisions classified as rear extensions in Thurrock, January 2020 to September 2026. 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 Thurrock Council's public planning portal. Full methodology →
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