Data-backed planning intelligence · 3,770,000+ decisions analysed across England

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 1,711 real decisions tell us about rear extension outcomes in Solihull.

1,711 real decisions·January 2020 to August 2026·Updated August 2026
91.4%
Approval Rate
1,711
Decisions
1,563
Approved
148
Refused
91.4% approved. But 148 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)554
95.8%
Front Extension393
95.2%
Side Extension961
94.6%
Conservatory204
93.6%
Garage / Parking1,000
92.8%
Wraparound Extension174
92.5%
Dormer323
92.3%
Outbuilding232
92.2%
Rear Extension1,711
91.4%
Loft Conversion248
90.3%
New Build162
85.8%
Hip-to-Gable Conversion42
85.7%
Change of Use (Residential)210
82.4%
Annex43
81.4%
See how this applies to your postcode →

What the data tells us

1
91.4% of rear extension applications in Solihull get approved. That means 148 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

148 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 3,770,000+ real decisions

More Solihull planning data

Nearby councils rear extension data

Methodology: Based on 1,711 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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