Renewable energy projects in Hertsmere
20 solar, wind or battery projects of 150 kW or more are located in Hertsmere (REPD, July 2026 extract): 2 pending, 10 approved but not running, 3 operational and 1 refused. The council refused 4 of 16 decided applications (25%; UK 19%), with a median 11 weeks from submission to decision.
20projects in the council area
2awaiting a decision
10approved, not running
25%of decisions refused
How Hertsmere 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 | — |
Projects in Hertsmere
Projects of 1 MW and more (9)
| Project | Type | MW | Status (REPD) | Submitted | Decision | Record updated |
|---|---|---|---|---|---|---|
| Elstree Substation, Hilfield Lanebattery storage | battery storage | 400 | application withdrawnupdated Nov 2024 | Nov 2023 | — | Nov 2024 |
| Hilfield Lane, Aldenhambattery storage | battery storage | 170 | approved, not builtupdated Feb 2026 | Feb 2025 | granted Jan 2026 | Feb 2026 |
| Butterfly Lane, Elstree BESSbattery storage | battery storage | 99.9 | appeal lodgedupdated Jun 2026 | Jul 2025 | — | Jun 2026 |
| Hilfield Solar arrays & Battery storagesolar farm | solar farm | 49.9 | application withdrawnupdated Jul 2024 | May 2022 | — | Jul 2024 |
| Wrotham Parksolar farm | solar farm | 30 | application submittedupdated Aug 2025 | Jul 2025 | — | Aug 2025 |
| Land At Swanland Roadsolar farm | solar farm | 5 | operationalupdated Jul 2017 | May 2015 | granted Jan 2016 | Jul 2017 |
| Potters Bar Solar Farmsolar farm | solar farm | 5 | operationalupdated May 2017 | Sep 2015 | granted Dec 2015 | May 2017 |
| Elstree Film And TV Studios, Shenley Roadrooftop solar | rooftop solar | 3 | operationalupdated Sep 2023 | Feb 2023 | — | Sep 2023 |
| Bell Lane Solar Farmsolar farm | solar farm | 1 | refusedupdated Dec 2015 | Aug 2015 | refused Nov 2015 | Dec 2015 |
Smaller schemes under 1 MW, mostly rooftop solar (11)
| Project | Type | MW | Status (REPD) | Submitted | Decision | Record updated |
|---|---|---|---|---|---|---|
| Blanche Lane, South Mimmsrooftop solar | rooftop solar | 0.6 | under constructionupdated Jun 2022 | Jun 2022 | granted Aug 2023 | Jun 2022 |
| C P House, Otterspool Wayrooftop solar | rooftop solar | 0.3 | approved, not builtupdated Dec 2022 | Oct 2022 | granted Dec 2022 | Dec 2022 |
| David Lloyd Leisure Club, Hartspring Lanerooftop solar | rooftop solar | 0.3 | approved, not builtupdated Sep 2025 | Jul 2025 | granted Sep 2025 | Sep 2025 |
| Unit 2, York Crescentrooftop solar | rooftop solar | 0.2 | approved, not built may be out of dateupdated Dec 2022 | Oct 2022 | granted Nov 2022 | Dec 2022 |
| NIBSC, Blanche Lanerooftop solar | rooftop solar | 0.2 | approved, not builtupdated Dec 2023 | Oct 2023 | granted Dec 2023 | Dec 2023 |
| Willows Activity Farm, Colney Heathrooftop solar | rooftop solar | 0.2 | approved, not builtupdated Apr 2022 | Mar 2022 | granted May 2022 | Apr 2022 |
| North London Ad Plant, Coursers Roadrooftop solar | rooftop solar | 0.2 | approved, not builtupdated Sep 2024 | Jul 2024 | granted Aug 2024 | Sep 2024 |
| Centennial Park, Centennial Avenuerooftop solar | rooftop solar | 0.2 | approved, not builtupdated Mar 2025 | Dec 2024 | granted Feb 2025 | Mar 2025 |
| Multi Storage, Cranborne Industrial Estaterooftop solar | rooftop solar | 0.2 | approved, not builtupdated May 2023 | Mar 2023 | granted Apr 2023 | May 2023 |
| Hilfield Solar arrays & Battery storagebattery storage | battery storage | — | application withdrawnupdated Jul 2024 | May 2022 | — | Jul 2024 |
| Elstree Film And TV Studios, Shenley Road Solar Panels And ASHPsrooftop solar | rooftop solar | — | application withdrawnupdated May 2023 | Feb 2022 | — | May 2023 |
Postcode districts in Hertsmere
32% of applications still shown as pending in REPD were submitted more than two years ago, and only 37% of pending records were updated in the last 12 months, so some of them may already have been decided. Projects belong to Hertsmere by location (nearest postcode to the REPD grid reference); decisions are counted by the planning authority named in REPD.