Commercial solar in Horsham

Solar in Horsham in figures

What the figures show

Capacity in Horsham has grown by 32% since the end of 2020, slower than the UK as a whole (69%). In 2025 alone it rose from 69.2 MW to 72.7 MW.

There are 79.7 installations for every 1,000 households, above the South East median of 74.2 and above the UK median of 67.0. That is 122nd of 361 council areas, and 23rd of 64 in South East.

The average installation is 14.6 kW, about twice a typical home system, so larger commercial, farm and ground-mounted systems make up a good share of the capacity.

What a business roof in Horsham could generate

Modelled with PVGIS for the centre of Horsham, a south-facing roof at 30 degrees produces about 1,056 kWh per kWp a year. That is 48th of 361 council areas; the UK median is 998 kWh.

Same sums as our commercial solar calculator: illustrative, not a quote. East- or west-facing roofs, shading and how much power you use in daylight all move these figures, and a company paying corporation tax can usually shorten the payback with capital allowances. See the cost guide for price ranges by system size.

Planning and grid connection

Horsham follows the national planning rules for England. Permitted development rights for non-domestic rooftop solar were widened in December 2023, including removal of the old 1 MW limit, but conditions still apply, especially for listed buildings and conservation areas. Ground-mounted arrays and carports usually need an application to the council, or to a national park authority inside a national park. Our planning permission guide sets out the conditions.

Most commercial systems need G99 approval from the local network operator before they are switched on. The operator follows the postcode rather than the council boundary: our South East page covers the operators in the region, and the Energy Networks Association postcode tool confirms yours. See G99 and DNO applications.

For funding, see grants and reliefs in England.

Nearby council areas

• Adur, about 11 miles away
• Crawley, about 12 miles away
• Worthing, about 12 miles away
• Mid Sussex, about 12 miles away
• Brighton and Hove, about 15 miles away
• Waverley, about 15 miles away

Or see every council area and the South East page.

Where these figures come from

Installations, capacity, generation and households: Department for Energy Security and Net Zero, Regional Renewable Statistics, renewable electricity by local authority 2014 to 2025 (workbook). They cover all solar PV, homes and businesses, including ground-mounted schemes. Yield: PVGIS 5.3 (European Commission Joint Research Centre), SARAH3 data and 14% system losses, for the council area's centre point (ONS boundaries, December 2024), modelled 4 November 2026. Distances are between centre points.