
Heritage expertise and technical precision
Alden’s special projects service is designed to meet the unique challenges of non-routine works in existing and often historically significant buildings. From prestigious Oxford colleges to country estates, churches and listed properties, we provide tailored MEP solutions that balance modern building requirements with the constraints of legacy infrastructure. Whether working alongside a principal contractor or taking on the role of main contractor ourselves, we deliver a complete mechanical and electrical service with a specialist touch.
Our team is highly experienced in the complexities of working in live environments and within conservation guidelines. We regularly collaborate with architects, consultants and heritage bodies, ensuring that all work respects the fabric of the building while delivering long-term reliability and efficiency. With continuity from tender through to completion, our in-house team manages each project with care and attention to detail, ensuring that every installation maintains the unique character of the space.
Specialist boiler plant replacement and plant room modernisation
Our engineers have extensive experience in replacing outdated gas and oil boiler plant systems and associated building services with renewable energy solutions, including biomass boilers and ground- and air-source heat pumps. We also specialise in upgrading controls and reconfiguring plant rooms to meet modern energy performance standards, even in the most logistically challenging settings.
We’ve successfully delivered complex heating upgrades in live residential environments, including Oxford colleges, with minimal disruption to occupants. Our team also carries out full re-servicing and re-piping of buildings, applying our technical knowledge and experience to design solutions that work within the physical constraints of the space.


Delivered in-house by highly experienced engineers
Every special project is managed and delivered by Alden’s in-house team, many of whom have been with us since their apprenticeship. This depth of experience gives us the ability to foresee and solve site-specific issues before they impact the project or cost. From the earliest stages, we look for potential risks and engineer solutions that provide the best long-term outcomes for the client.
Our engineers are not only technically skilled, but also understand the importance of working discreetly and respectfully in sensitive, live or public environments. We combine Gas Safe certification with ongoing training from boiler and plant manufacturers to stay at the forefront of technology and regulations. With a reputation for delivering carefully managed, high-quality projects, we’re proud to be a trusted partner to many of our clients year after year.
Featured projects
Take a look at some of Alden’s most recent projects.
Our approach to renewable energy
Our design department is dedicated to carrying out all aspects of building services to incorporate renewable and energy efficient technologies wherever possible. We aim to provide environmental and financial benefits to our clients while also meeting the requirements of Building Regulations Part L.
Other services we provide
Alden delivers bespoke turnkey solutions for mechanical, electrical and plumbing projects of all types and sizes. Our in-house team offers a wide variety of services, allowing us to seamlessly manage and deliver every stage of the project.
FG Alden’s major projects contracting department accommodates the larger and more complex mechanical, electrical and plumbing projects.
FG Alden’s in-house design team delivers high-quality, technically advanced MEP design services tailored to the unique needs of each project.
FG Alden’s team has the in-depth knowledge to design and install low-carbon solutions that deliver environmental, financial and sustainability benefits across every project.
Why choose Alden?
- Over 100 years of experience
- Fully insured and BS EN ISO 9001 accredited
- Awarded the Royal Warrant of Appointment to the King
- In-house team of highly qualified experts
- Established relationships with vetted and approved contractors















