347 decisions · 45 wards · 31 conservation areas · 2023–2025
Stop guessing what Hillingdon approves
A refused scheme costs £20,000 to £35,000 in abortive fees. We have coded every small site decision in Hillingdon so you can see what actually gets through, before you spend a penny on the application.
Hillingdon at a glance
Applications decided
347
Refusal rate
49%
Top refusal reason
Design quality (70%)
Best site type
Extension (60%)
Median determination
10 weeks
Abortive cost exposure
£4,275k
171 refusals at ~£25k average
What the data shows
49%
Refusal rate
171 of 347 decided applications refused
Verified
60%
Extension approval
Highest approval rate by site type (EXT)
Verified
70%
Design quality
Most common refusal reason across extracted decisions
Verified
Two ways to use this
For a specific site
Site Assessment
Should I buy this site?
£1,000
You send us an address. We send back a verdict in 48 hours.
- Risk rating based on comparable approvals and refusals in Hillingdon
- Capacity model: how many units the data supports
- Viability table with build cost, GDV, finance, CIL, and land residual
- Refusal risk flags specific to your site type and area
- Comparable case studies with outcomes
Borough Report
What do I need to know about Hillingdon?
£1,500
The full picture, built from all 347 decisions. Delivered instantly.
- 8-part report covering every area, site type, and refusal pattern
- Density benchmarks with P20 to P75 ranges by type
- Area-by-area approval rates and determination times
- Viability model with unit-count cliff chart
- Refusal reason breakdown and condition checklist
- Excel workbook with the underlying data
- 12 months of quarterly updates included
Not ready to buy? Start with the free snapshot.
The Hillingdon Market Snapshot has five headline findings on one page. No cost, no commitment. See the quality of the data before you decide.