For more than 25 years, NG Bailey has led the evolution of offsite manufacturing (OSM) from our dedicated Bradford facility, earning a reputation for delivering high‑quality prefabricated MEP solutions.
Today, OSM unites five services under one roof, creating a delivery model built on pace, quality and predictability. Our growing catalogue of standardised products ensures repeatable, reliable outcomes, while our MEP and OSM consultants tailor every solution to the project’s specific technical requirements.
This combination of standardisation and engineering expertise gives our clients the best of both worlds, solutions that are efficient, predictable and precisely designed where it matters most.
Our vision is to transform how buildings and infrastructure are delivered across the UK by providing high‑quality offsite manufacturing solutions that clients can rely on.
This hybrid model blends the efficiency of modern manufacturing with engineered flexibility, ensuring faster programmes, consistent quality and solutions tailored precisely to each project’s needs.
Our OSM consultants provide expert guidance across all stages of a project. From MMC strategy and feasibility studies to BIM modelling and engineering technical management, OSM Consult helps clients unlock the full potential of their project with a focus on offsite manufacturing. We embed offsite thinking early, reducing risk, improving coordination and creating a clear route to efficient, buildable solutions.
Our OSM Assemble service brings complex MEP systems into a controlled factory environment where quality, safety and productivity can be optimised. By assembling and testing modules before they reach site, we reduce interfaces, remove programme risk and accelerate installation. Working closely with design teams, every solution is engineered for seamless integration, helping clients achieve faster delivery and the full benefits of offsite manufacturing.
With over two decades of modular MEP design, construction and coordination experience, OSM Ventilation strengthens our ability to deliver fully integrated offsite systems. We manufacture DW 144, fire-rated and stainless-steel ductwork to exacting standards, designed for seamless coordination with our assemblies. Bringing ventilation in-house reduces interfaces, risk and installation time, giving clients greater quality assurance, programme certainty and a single, accountable delivery partner.
OSM Fabricate provides high-integrity welded solutions with the consistency of industrialised manufacture. Certified teams use advanced processes and rigorous inspection to deliver fully traceable quality. Moving critical welding offsite improves safety, reduces on-site congestion and protects programme certainty. Each component is precisely engineered and tested, ensuring efficient integration into modular MEP systems and wider project delivery.
OSM Hire supplies the equipment and infrastructure needed to keep factory output and site activity aligned. Flexible, programme-led hire removes bottlenecks and maintains momentum from manufacture to installation. From lifting and handling to bespoke temporary works, every solution is coordinated to support safe, efficient delivery on site. Our MEP and OSM consultants, help clients realise the speed, certainty and productivity of offsite construction.
Every project tells a story of collaboration, technical excellence and delivery at scale. Discover how we help our clients overcome complex challenges, improve performance and create long-term value through our projects.
Discover more
Delivering large-scale engineering facilities through a coordinated, offsite-led approach in a constrained city centre environment
Pioneering platform-based design and offsite manufacturing to deliver the UK’s first net zero carbon commercial office building
Accelerating the delivery of a nationally significant battery innovation facility through offsite-led M&E solutions
Applying industrialised offsite manufacturing to deliver high-volume services infrastructure within a fast-paced manufacturing environment
Using standardisation and offsite manufacturing to transform the delivery of critical water infrastructure at scale
Delivering large-scale MEP infrastructure to support the transformation of a major international airport
Delivering critical electrical infrastructure and safety systems for a major new Thames crossing
Our Safer, Better, Faster, Greener approach is at the core of our MEP engineering and OSM solutions, raising industry standards and transforming the way projects are designed, manufactured and delivered. By shifting activity into safer, controlled factory environments, we remove key on‑site risks and create the conditions for precision engineering and early collaboration, ensuring consistently better quality.
Our industrialised processes accelerate delivery by reducing interfaces and programme uncertainty. Our facilities, meanwhile spanning four key UK locations and powered by sustainable energy, minimise waste, cut carbon and reduce vehicle movements to support a greener, more responsible way to build.
Have a question or want to discuss an offsite manufacturing project? Complete our contact form and a member of our team will get back to you as soon as possible.
We design, power, manufacture, operate and maintain buildings, infrastructure and services.
Explore the sectors we serve including commercial, retail, energy, transport and critical infrastructure.
Explore opportunities to grow your career, develop your skills and make a real impact.
See how we deliver ambitious projects that shape the built environment and support communities.