Basement planning approval rate in Hillingdon
86% of 432 decided basement applications in Hillingdon were approved.
Checked against 20.6 million UK planning applications on file across 420 planning authorities. Approval rates from 2,343,419 decisions we classified across 181 councils in England.
A similar project nearby can help you understand the council's decisions. Its outcome does not establish what will be acceptable at your address.
86%
Approval rate, all years, from 432 decided
432
decided basement applications in Hillingdon: 371 approved, 61 refused
86%
Recent rate, decided since 2022, from 183 decided
How to read these rates
These are historical outcomes for the applications in our archive, not the chance of approval for your property. Compare the same project type and read the decided count alongside each percentage.
About the planning data
Rate = approved divided by approved plus refused, using the decisions in our classified archive. Rates are withheld as unknown where fewer than 8 records of that project type were decided. Withdrawn applications are excluded.
Recent means records dated 2022 or later. Records without a year are excluded from the recent rate but remain in the all-years figure. Historical coverage varies by council, and duplicate application references may remain in the archive.
Approval rates from 2,343,419 decisions we classified across 181 councils in England. The wider 20.6 million application catalogue is accessible through PlanIT; it is not the dataset used to calculate these percentages.
Read the full methodology and coverage notes.
Project types and outcomes are classified from council records. Check the original application and decision notice before relying on an individual example. A page rebuild does not mean every council record has just been refreshed.
Example basement decisions in Hillingdon
These examples deliberately include approved and refused applications where available. They are not a representative sample or a list of the latest decisions. Look up each reference on the council's planning search to read the plans and decision notice.
| Reference | Year | Decision | Application |
|---|---|---|---|
| 1331/APP/2025/3109 | 2026 | Approved | Details pursuant to the partial discharge of Condition 51 (pedestrian/vehicular gates/barriers - Block C only) of planning permission ref. 1331/APP/2019/231... FORMER NESTLE FACTORY |
| 1331/APP/2026/21 | 2026 | Approved | Details pursuant to the partial discharge of Condition 23 (Overheating - Block C only) as attached to planning permission ref. 1331/APP/2019/2314 dated 28-06... FORMER NESTLE FACTORY |
| 1331/APP/2026/37 | 2026 | Approved | Details pursuant to the partial discharge of Condition 22 (Rail vibration and ground-borne noise - Block C only) of planning permission ref. 1331/APP/2019/23... FORMER NESTLE FACTORY |
| 35710/APP/2021/4474 | 2025 | Refused | Erection of outbuilding with basement in the rear garden. Outbuilding ancillary to the commercial premises. 214 WHITBY ROAD |
| 61523/APP/2024/2800 | 2025 | Refused | Erection of 1no. 1-bedroom detached dwelling with associated basement, bin and cycle store, parking and amenity space. LAND REAR OF 73 WILLOW TREE LANE AND ADJACENT TO 2 |
| 78323/APP/2025/1386 | 2025 | Refused | Non-material amendment to remove and replace Condition 8 (Habitat Management Plan) of planning permission ref. 78323/APP/2024/968, dated 11-11-2024 (Erection... 140 LINDEN AVENUE |
About the planning data
Checked against 20.6 million UK planning applications on file across 420 planning authorities. Approval rates from 2,343,419 decisions we classified across 181 councils in England.
Other project types in Hillingdon
- Single-storey rear extension 83%, 7,240 decided
- Two-storey rear extension 66%, 2,756 decided
- Wraparound extension 79%, 844 decided
- Side extension 71%, 1,686 decided
- Loft conversion and dormer 74%, 585 decided
- Rooflight 89%, 2,768 decided
- Outbuilding and garden room 81%, 1,230 decided
- Porch 75%, 374 decided
- Garage conversion 89%, 425 decided
- Window and door 86%, 496 decided