IN Brief:
- Scottish Hydro Electric Transmission is seeking contractors for a £7.4bn grid construction framework.
- Lots cover civils, buildings, overhead lines, and underground cable works.
- The framework will support Scotland’s expanding transmission network and renewables connection pipeline.
Scottish Hydro Electric Transmission has launched procurement for a £7.4bn contractor framework to support high-voltage network investment across Scotland.
The business is seeking long-term strategic delivery partners across six workstreams covering civils, buildings, overhead lines, and underground cable construction. Framework agreements could run for up to eight years, giving successful contractors a long pipeline of regulated energy infrastructure work.
The procurement will support transmission network upgrades, customer connections, asset renewal, and net zero investment projects as SSE expands spending on critical electricity infrastructure. Prequalification submissions are due by 16 July 2026.
The largest opportunities sit in civil engineering. One lot covers projects worth up to £10m, including substation site clearance, earthworks, foundations, access tracks, roads, and drainage. A second civils lot covers schemes above £10m, including major substation platforms, reinforced foundations, access roads, bridges, retaining walls, culverts, and flood defences.
Further lots cover buildings and infrastructure, overhead line pole construction, overhead line tower construction, and underground cable works at 132kV and above. The buildings workstream includes storage buildings, offices, welfare buildings, fit-out works, M&E, and RAAC roof replacement.
The framework follows a run of major transmission projects moving through the Scottish construction market. BAM’s first ASTI substation contract for SSEN Transmission in Aberdeenshire has already shown how grid delivery now combines major civils, building works, local supply-chain commitments, and specialist electrical systems.
Scotland’s electricity network is being reshaped by renewable generation, subsea interconnectors, and rising demand from electrification. That shift is pulling contractors into a market that requires civil engineering depth as well as experience in complex utilities, rural access, environmental controls, temporary works, and commissioning support.
Substations, overhead lines, and cable routes place heavy demands on construction logistics. Remote sites often require new access tracks, bridges, drainage, compounds, security, welfare facilities, and environmental mitigation before core electrical infrastructure can be installed. The building elements may appear secondary to the power systems, but they are critical to programme certainty and safe operation.
Framework procurement can help clients and contractors manage that complexity. A long-term agreement gives contractors better visibility over future workload, while clients can build repeatable delivery models and develop relationships with suppliers that understand network standards, outage constraints, safety procedures, and environmental expectations.
The scale of the framework also creates capacity questions for the wider market. Grid work is increasing at the same time as water, highways, rail, housing, and industrial projects are competing for plant, civils teams, designers, project managers, and specialist subcontractors. Contractors will need to balance growth opportunities against the risk of stretching resources across too many regulated infrastructure programmes.
For Scotland’s construction sector, the framework could become one of the main routes into grid upgrade work over the next decade. The strongest bids are likely to combine civil engineering capability with safety performance, programme discipline, local supply-chain access, and the ability to work in demanding rural and environmentally sensitive locations.
