Mechanical, Electrical & HVAC · Lighting & Energy
Service & Maintenance · Soft Strip Out
Most clients who come to us are managing too many moving parts. Multiple contractors, fragmented accountability, and no single team with a clear view of the full picture.
ASG was built to solve that. Every division sits in-house: Mechanical, Electrical & HVAC, Lighting & Energy, Service & Maintenance, and Soft Strip Out.
When something needs resolving, you are not chasing three contractors. You are calling us.
Our involvement does not stop at practical completion either. We support clients through the full lifecycle of their systems, from initial brief through installation, commissioning, and long-term planned maintenance.
2001
Eddie Maxwell founds All Seasons in Ilford, delivering air conditioning installations for residential and small commercial clients.
2005
All Seasons begins working in the education sector and moves to larger premises with warehouse facilities in Loughton.
2006
All Seasons begins working with Colin Owen’s installation teams, starting a partnership that would later shape the leadership of the business.
2012
After securing its first major M&E contracts, All Seasons moves beyond air conditioning to deliver full mechanical and electrical works.
2013
Steven Maxwell joins the business, learning delivery on site before moving into operational management.
2014
Service and maintenance, previously a small part of the business, becomes a dedicated division and sees rapid growth.
2017
Colin Owen joins as a partner, and he and Steven Maxwell are appointed directors. Group turnover passes £10 million, and the business invests in new offices in Loughton.
2021
Eddie Maxwell’s steps back from day-to-day operations, Colin and Steven take full leadership and rebrand the business as ASG: an engineering-led principal contractor delivering mechanical and electrical solutions directly to end-user clients.
2022
ASG Lighting Solutions is formed to deliver lighting design, LED retrofit and controls, specified on building performance.
2025
ASG completes more than 330 mechanical projects in the year and retains 98% of its clients.
2026 Onwards
Working to a 20% year-on-year growth plan, ASG aims to lead the industry in delivery for its clients, and to keep advancing its offer through new tools and strategies.
Our vision is to be the engineering partner that removes complexity from every project we take on. Seamless delivery, full compliance, and minimal disruption are not exceptional standards at ASG. They are the baseline.
Our mission is to be the partner clients can rely on at every stage, from first brief to long-term maintenance. Honest communication, practical solutions, consistent results. When you work with ASG, you are working with a team that takes ownership of the outcome.
Delivered across the UK. Managed from a single point of contact.
ASG has been delivering M&E projects since 2001. The majority of our work comes from clients who have worked with us before, or from referrals by those who have.
We hold preferred supplier status with some of the UK’s largest facilities management firms. We have delivered projects for Circle Health Group, British Airways, and Fidelity International. We do not win that work on price. We win it because our clients know what they are getting before the project starts.
If you are evaluating contractors, that is the most useful thing we can tell you. Ask us for references.








