Independent UtilityInfrastructure Consultants
We help clients make better commercial decisions through trusted independent utility infrastructure advice.
Independent advice. Trusted expertise. Better outcomes.
About Us
Petrie Buchanan is the UK’s trusted independent, specialist utility infrastructure consultancy, helping developers, housebuilders and infrastructure partners make better commercial decisions from the earliest stages of a project.
We work for you – not the utility provider. That’s what gives you cost certainty, programme certainty, and procurement decisions that actually work in your favour.
We’ve been doing this since 2000. We were the first consultancy in the UK to procure an independent gas network, and we’ve since delivered more than 1,000 projects with a combined development value of over £10bn. That covers housing, schools, commercial schemes and community heating networks, as well as water, wastewater and telecoms.
Today we’re part of the Wallace Whittle Group, combining our specialist utility knowledge with the wider engineering and sustainability expertise of a UK-wide consultancy.


Our Expertise
From first site appraisal to final connection, we manage utility infrastructure end to end – protecting cost certainty, reducing risk, and securing the most economical route through design, diversions, masterplanning and procurement.
Our accredited designs meet WIRS, NERS and GIRS standards, and because we’re not tied to any connection provider, every recommendation is based on what’s right for your project.
Core service areas
- Utility Design & Connections
- Diversions & Constraints
- Utility Masterplanning
- Commercial Optimisation

