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Rear Extension Approval Rates in Solihull

Rear extensions are the bread and butter of UK planning — and one of the most common reasons homeowners face a refusal. Here's what 1,725 real decisions tell us about rear extension outcomes in Solihull.

1,725 real decisions·January 2020 to August 2026·Updated August 2026
91.2%
Approval Rate
1,725
Decisions
1,574
Approved
151
Refused
91.2% approved. But 151 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 Solihull.

TypeDecisionsRate
Extension (General)560
95.4%
Front Extension399
94.7%
Side Extension965
94.4%
Conservatory207
93.2%
Garage / Parking1,008
92.6%
Outbuilding232
92.2%
Wraparound Extension175
92.0%
Dormer328
91.5%
Rear Extension1,725
91.2%
Loft Conversion251
90.0%
Hip-to-Gable Conversion43
86.0%
New Build163
85.9%
Annex43
81.4%
Change of Use (Residential)214
81.3%
See how this applies to your postcode →

What the data tells us

1
91.2% of rear extension applications in Solihull get approved. That means 151 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

151 rear extension applications in Solihull 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 3,780,000+ real decisions

More Solihull planning data

Nearby councils rear extension data

Methodology: Based on 1,725 planning decisions classified as rear extensions in Solihull, January 2020 to August 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 Solihull Council's public planning portal. Full methodology →
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