Sero and SNG (Sovereign Network Group) have announced the continuation of their long-term partnership to deliver independent Retrofit Co-ordination Services for SNG’s Wave 3 Warm Homes Social Housing Fund Project, which has secured £36.5m in funding to retrofit 4,500 homes — the second largest funding allocation for a single landlord under Wave 3.
The partnership reflects SNG’s commitment to delivering retrofit works to the highest standards while maintaining independent oversight, ensuring contractors aren’t “marking their own homework.” Building on their successful collaboration on Wave 2.1, where Sero supported both the bid submission and the delivery of 1,000 homes (£9.4m funding), this marks the second large-scale retrofit project between the two organisations.
The Warm Homes Wave 3 project will deliver a combination of ventilation and airtightness improvements, insulation measures (largely loft and cavity wall), and electrified heating via air source heat pumps. These interventions aim to lower residents’ bills and enhance comfort, health, and wellbeing, while delivering on SNG’s Homes and Place Standard and mapping a clear pathway to net zero. For some homes, SNG will be self-funding further improvements, such as the installation of rooftop PV panels and batteries to move as many homes as possible beyond EPC C.
“This partnership marks another exciting chapter in our ongoing collaboration with SNG,” said Andy Sutton, CIO and Co-Founder of Sero. “Independent, data-led retrofit co-ordination ensures projects deliver real-world results, helping thousands of residents live in warmer, more affordable homes while accelerating progress toward net zero.”
“We’re delighted to continue our partnership with Sero,” commented Jim Dyer, Director for the Built Environment for SNG. “Their expertise supports our commitment to quality and transparency, helping us deliver retrofit works that truly benefit our customers and communities, along with delivering to the strategic and holistic outcomes of our Homes and Place Standard and investment strategy as we map a pathway to Net Zero.”
SNG’s corporate plan for its 85,000-home portfolio commits to EPC C by 2035, EPC B+ by 2047, and Net Zero by 2050, supported by a £0.5bn, 10-year investment to retrofit 15,000 homes to EPC B+. Sero’s in-house software and expert team have played a key role in developing SNG’s Portfolio Net Zero Model, identifying bespoke, step-by-step pathways for every home – from fabric improvements to future technologies such as solar PV, battery storage, and deeper fabric upgrades.
Together, SNG and Sero continue to set the standard for independent, outcomes-driven retrofit delivery across the UK’s social housing sector.
