Company
Sutton Decentralised Energy Network Ltd, Companies House number 10022446, registered office Civic Centre, Sutton SM1 1EA. Sole shareholder: London Borough of Sutton.
Key facts and figures
Figures are SDEN's or the Council's own unless stated. Check the linked source before you rely on any figure.
Directors
Five directors listed at Companies House in October 2026, of whom three are Council officers. Names are on the public register.
Customers
About 805 homes and a few businesses at New Mill Quarter, Hackbridge. Developer customer: Barratt (25-year supply contracts).
Heat source today
Landfill-gas engines at Beddington with on-site gas boilers as back-up.
ERF heat
Heat Purchase Agreement with Viridor for up to 15 MW. Forecast start 1 April 2027.
Reported losses
£76,753 (2023/24) and £100,568 (2024/25). Owed to the Council: £2,457,645 (draft accounts).
Forecast losses
£10k (2026/27), £20k (2027/28), £10k (2028/29); loans repaid by 2050/51 (SDEN forecast).
Availability
SDEN reports 99.99% availability in 2025 and one outage on 14 Nov 2025. Brochure said ‘100% availability’.
Outages (press)
The Sutton Guardian (Dec 2023) reported an outage on 6 Dec 2023, affecting about 700 homes, as the 30th on the network since 2021.
2026/27 tariff
Average 2-bed £750.02 v £770.81 domestic-gas comparator (about 2.7% lower), SDEN's own method.
Tariff error
An error left an Apr–Dec 2025 tariff increase unapplied (average undercharge £25–£35); reported to Ofgem.
Grant
£877,000 Green Heat Network Fund grant (March 2025); a £498,614 top-up was applied for on 23 Jan 2026 (outcome not seen).
Loan
£1.015m loan (Council) for the Lavenders scheme approved Nov 2024; secured 15 Dec 2025.
Carbon
SDEN projects 988 tCO2 a year saved from July 2023 at New Mill Quarter. No independent calculation seen.
Unverified Sources: S3
Regulation
Ofgem regulation live from 27 Jan 2026.
Large connections
Council forecasts construction costs ‘in excess of £50M’ for several large connections (London Cancer Hub, Croydon University Hospital and others).