Case study — National and Local Government
National Highways Depots
Principal contractor for energy efficiency works across 25 depots nationwide — extended to a further 10 sites on the strength of delivery.
- National Highways
- National and Local Government
- Nationwide
- 25 depots
Background
Synergize were appointed as principal contractor to complete energy efficiency works at 25 National Highways depots across the UK, working closely with National Highways to find energy efficiency improvements whilst maintaining best value for money.
This project comprised a full turnkey solution, from desktop surveys, full site inspections, design proposals and regulatory advice, through to delivery of installation and handover. Due to our success, National Highways extended our contract to include 10 additional sites.
- Solar
- ASHPs
- LED Lighting
- Assessment
- Design
Delivery approach
Synergize collaborated with our experienced delivery partners, Platinum Renewables, to deliver this project across all sites. Similar to Synergize, Platinum Renewables are TrustMark accredited, MCS-certified installers with experience delivering successful national retrofit and energy efficiency works to commercial and residential properties.
This partnership allowed us to design bespoke, tailored solutions for each National Highways site, ensuring maximum cost savings and efficiency in the long term.
Challenges & solutions
01 Complex stakeholders
This project involved a wide range of stakeholders, including National Highways, their FM providers working as principal contractors on their own projects, and our own supply chain. To ensure efficient collaboration, we implemented a structured stakeholder engagement process and worked closely with the client’s project team.
02 National sites
Sites are spread across England, from the North West, Yorkshire and Midlands to the South West and South East. To ensure smooth project management and efficient coordination, Synergize leveraged our specialist project experience, dedicated decarbonisation experts and innovative digital tools to deliver smooth installation of solar PV and ASHPs.
03 Security on selected sites
As standard, we used drone surveys to assess rooftops for solar PV installation. Where this was not possible due to security on some sites, we used alternative survey techniques and liaised with other contractors on site to ensure a full understanding of building condition.
Project success
The systems installed through this project will significantly reduce National Highways energy bills.
- At Coleshill Depot, solar PV will save an estimated £23,464 in annual electricity costs
- At Kneeton Corner Depot, solar PV will save an estimated £9,568 in annual electricity costs
- 11 of the 25 original sites completed by February 2026