Novus starts £7.5m retrofit of 460 GreenSquareAccord homes in North Wiltshire

Novus Property Solutions has started a £7.5m programme to improve the energy efficiency of 460 GreenSquareAccord homes across North Wiltshire, under a contract that began in August 2026 and runs until 2029.

The contractor said the work was awarded through Fusion21's Decarbonisation Framework and covers properties in towns and villages including Calne, Corsham, Royal Wootton Bassett, Box, Cherhill, Dauntsey, Hilmarton, Lacock, Lyneham and Rudloe.

According to Novus, the programme is being delivered to PAS 2035 and takes a fabric-first, whole-house approach, considering how the different elements of each building work together rather than treating each upgrade on its own.

The homes and the measures

The properties are traditional-build houses and bungalows of one to three bedrooms, Novus said, with the work tailored to the characteristics of each home.

Planned measures are loft insulation, solar photovoltaic (PV) panels, air source heat pumps, high heat retention storage heaters, ventilation improvements and replacement windows and external doors. The mix of measures will vary according to the needs of each property, the company said.

Novus did not state how the North Wiltshire programme is funded.

The framework

Fusion21's current Decarbonisation Framework is worth up to £1.5bn over four years and runs from 28 April 2025 to 27 April 2029, according to the procurement body's framework page.

Fusion21 announced the appointed suppliers on 7 May 2025, naming 40 firms, 42% of them SMEs. Novus Property Solutions Limited is listed under Lot 1, Whole House Decarbonisation; Lot 2 covers the decarbonisation of public and educational buildings.

Peter Francis, Group Executive Director (Operations) at Fusion21, said when the suppliers were announced: "Decarbonisation and achieving the Government's ambitious net zero target by 2050 is no easy task".

Fusion21 says suppliers appointed to the framework are PAS 2035:2023 compliant and TrustMark accredited. Novus's own decarbonisation arm, Novus Sustain, says it is PAS 2030 accredited and delivers PAS 2035 and PAS 2038 compliant schemes.

Novus Sustain says its work includes social housing retrofits funded through the Warmer Homes Fund and public sector projects supported by Salix funding. The wider company says it has operated for more than 125 years, tracing its origins to the Seddon brothers.

Wider funding context

Separately, the Department for Energy Security and Net Zero lists GreenSquareAccord as a consortium member of the West of England Combined Authority's award under Warm Homes: Social Housing Fund Wave 3, for which grant funding of £66,721,595 was offered and accepted. The department updated its list of Wave 3 recipients on 7 November 2025, after all grant funding agreements had been countersigned.

Novus's announcement does not link the Wiltshire contract to that award, and the funding source for the £7.5m programme has not been stated.

The North Wiltshire contract is due to run until 2029.