Same name, same team, now with the backing of an established UK engineering group.
In May 2026, Petrie Buchanan became part of the Wallace Whittle group. We continue to operate as Petrie Buchanan, with our directors and full team in place and John Petrie leading the business.
Since 2000, we have provided multi-utility infrastructure design and management to housebuilders and developers across the UK, from planning through to completion. That work carries on exactly as before. What has changed is the strength behind it.
Wallace Whittle is an independent building services engineering and sustainability consultancy with more than 200 people across nine UK offices. Our two teams have worked alongside each other for years, so joining the group formalises a relationship that was already working well for clients.
John Petrie, Director at Petrie Buchanan, said:
“After 25 years delivering expertise for our clients in the utilities sector, becoming part of the Wallace Whittle group is a significant milestone to support our growth and succession planning as well as theirs. I feel we’ve found the perfect culture fit for our team in joining forces with Wallace Whittle, and I’m looking forward to working with the management team, as I retain my role as company lead, to create a stronger and more comprehensive offering for the marketplace.
With demand high for our service offering, it’s a new and exciting challenge to maximise this with the backing of an established group.”
What this means for our clients
- The same people. Your contacts, our processes and the way we work with you are unchanged.
- Better coordination. With utilities and building services expertise in one group, energy and infrastructure constraints can be dealt with earlier, reducing delays later in a project.
- Support across the full project lifecycle. Clients can call on mechanical, electrical, public health and sustainability expertise through Wallace Whittle when a project needs it.
- Room to grow. Demand for utilities expertise is high, and group backing gives us the capacity to meet it.
Allan McGill, Managing Director at Wallace Whittle, said:
“Petrie Buchanan’s experience and relationships within the utilities sector will help our clients access expertise more quickly while improving cohesion across services.
Petrie Buchanan has a fantastic existing reputation and we’re eager to start working closely with the team. Energy is the thorn in everyone’s side currently and with each project needing to consider it we’re looking to join up to ease those pressures.”
If you’d like to talk about how we can support your next development, get in touch with the team.
