Butterfly Lane, Elstree BESS (99.9 MW)
Butterfly Lane, Elstree BESS is a 99.9 MW battery storage project in Hertsmere, England. Its status in the Renewable Energy Planning Database (July 2026 extract) is: refused; appeal lodged on 31 March 2026; the record was last updated on 8 June 2026.
99.9 MWbattery storage
appeal lodgedstatus in REPD
8 June 2026record last updated
Hertsmerecouncil area
Planning timeline
| Date | Stage |
|---|---|
| 18 July 2025 | Application submitted |
| 31 March 2026 | Appeal lodged |
Project details
- Technology
- battery storage (stand-alone storage)
- Capacity
- 99.9 MW
- Status (REPD)
- appeal lodged
- Record last updated
- 8 June 2026
- Operator or applicant
- Greenfield Energy Developments Limited
- Planning authority
- Hertsmere
- Planning application reference
- 25/1070/FUL
- Appeal reference
- 26/0016/APP
- Address (REPD)
- Opp Jnct With Butterfly Lane, E/O Watling Street, Radlett
- Council area (by location)
- Hertsmere
- Name in REPD
- Butterfly Lane, Elstree BESS - Battery Energy Storage System
- REPD reference
- 19441
Who decides
| Applications | Hertsmere | UK |
|---|---|---|
| Decided applications (solar, wind, battery) | 16 | 10,236 |
| Refused | 4 (25%) | 19% |
| Solar refused | 2 of 13 | 12% |
| Battery storage refused | 2 of 3 | 16% |
| Median time from submission to decision | 11.4 weeks | 17.0 weeks |
| Appeals lodged / allowed | 4 / 1 | — |
Other large projects within 10 km
| Project | Type | MW | Status | km |
|---|---|---|---|---|
| Elstree Substation, Hilfield Lane | battery storage | 400 | application withdrawn | 3.1 |
| Hilfield Solar arrays & Battery storage | solar farm | 49.9 | application withdrawn | 3.3 |
| Hilfield Lane, Aldenham | battery storage | 170 | approved, not built | 3.4 |
| Wrotham Park | solar farm | 30 | application submitted | 5.4 |
| Land At Swanland Road | solar farm | 5 | operational | 6.7 |
| Tollgate Farm, Welham Green Solar Farm | solar farm | 16 | application submitted | 7.5 |
| Beechtree Junction, Potters Crouch | solar farm | 49.9 | application submitted | 7.8 |
| Dellsome Power Hatfield Grid Station Energy storage facility | battery storage | 5 | approved, not built | 7.9 |
| Tollgate Farm Battery Storage | battery storage | 49.5 | under construction | 8.0 |
Status and dates as recorded in the Renewable Energy Planning Database (July 2026 extract); the database is compiled from public sources and can lag behind council decisions. Location: REPD grid reference (51.684, -0.3177).