IES Utilities Group Ltd

Heat Networks

We deliver investable, future-ready low-carbon energy systems that serve people, businesses, and communities. With international expertise and innovation at our core, we create heating and cooling solutions that are technically robust, commercially viable, and environmentally sustainable.

Guided by RIBA conventions, our services span every project milestone, offering the flexibility to meet your specific needs, procurement protocols, and delivery expectations.

Design & Build Services Across the UK & Ireland

We offer a full suite of services;

Engineering Design & Professional Services

• 70 engineers and architects with interdisciplinary skills.
• Clear, evidence-based deliverables including feasibility studies, engineering design and stakeholder engagement.
• Over 25 years of district energy engineering expertise, including low-temperature thermal grids, pharma energy systems, and datacentre waste heat recovery. 

Investment-Grade Business Cases

• Techno-economic modelling with IRR, NPV, cashflow, and sensitivity analysis for resilient investment decisions.
• Alignment with HM Treasury Green Book standards for robust, fundable cases.
• Delivery of investable projects for local authorities, airports, industrial clusters, and housing associations.
• Expertise in socio-economic and consumer economics modelling, including non-profit district heating economies.

Infrastructure Services

• Supply & installation of infrastructure pipework (all mechanical, welding, and jointing)
• Repair & Maintenance, network extensions & densification, asset replacement, emergency cover
• Testing & commissioning, leak detection, system performance & monitoring
• Geotechnical investigations & surveying (including GPR)

Civil Engineering Services

• Street works: excavation & reinstatement inc deep excavations & temporary works
• Trenchless solutions inc horizontal directional drilling (HDD)
• Traffic management, road cleaning, permits & license co-ordination
• Valve chambers, substructures & support structures

Flexible Engagement

We’re always open to tailoring our offerings to match your goals.