Basement planning approval rate in Hertsmere
84% of 136 decided basement applications in Hertsmere 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.
84%
Approval rate, all years, from 136 decided
136
decided basement applications in Hertsmere: 114 approved, 22 refused
89%
Recent rate, decided since 2022, from 45 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 Withdrawn applications are excluded.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 Hertsmere
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 |
|---|---|---|---|
| 24/0338/FUL | 2026 | Approved | Demolition of existing detached house and construction of apartment building with 6 flats and basement parking. External works to create gardens, terraces an... 20 Watford Road Radlett Hertfordshire WD7 8LE |
| 25/1179/FUL | 2026 | Approved | Demolition of existing dwelling to facilitate construction of two storey detached dwellling with basement level with associated hard and soft landscaping (ad... 8 Letchmore Road Radlett Hertfordshire WD7 8HT |
| 23/1569/FUL | 2025 | Approved | Demolition of existing dwelling and construction of 3 x detached two storey dwellings with accommodation at basement and loft level, attached garages, bin st... 4 The Avenue Radlett Hertfordshire WD7 7DJ |
| 25/1245/HSE | 2025 | Refused | Increase in floor space of existing basement and ground floor rear extension following demolition of existing conservatory with partial first floor rear dorm... 2 Highland Drive Bushey Hertfordshire WD23 4LH |
| 23/0878/HSE | 2023 | Refused | Two storey side and single storey rear and basement extensions with internal alterations. Rebuilding of side wall and restoration of existing outbuilding. (A... Wild Farm Harper Lane Radlett WD7 9HJ |
| 23/0929/FUL | 2023 | Refused | Demolition of existing house and construction of a detached 7 bedroom dwelling to include habitable accommodation in the roof space and at basement level. As... Lychgate The Warren Radlett Hertfordshire WD7 7DU |
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 Hertsmere
- Single-storey rear extension 81%, 1,787 decided
- Two-storey rear extension 85%, 972 decided
- Wraparound extension 92%, 436 decided
- Side extension 84%, 702 decided
- Loft conversion and dormer 79%, 281 decided
- Rooflight 90%, 918 decided
- Outbuilding and garden room 78%, 274 decided
- Porch 90%, 195 decided
- Garage conversion 96%, 294 decided
- Window and door 90%, 223 decided