We build mechanical systems.
Design and build mechanical contractor. GB4 Mechanical Ltd is a trusted provider of innovative HVAC solutions, dedicated to creating comfortable, healthy, and energy-efficient indoor environments.
We do our own calculations. We do our own CAD.
No subcontracting the thinking.
How we deliver
Design
Heat gains, load calculations, and full CAD detailing. Every system is sized and drawn in-house before a single valve is ordered.
Delivery
Plant procurement, contractor coordination, and build-quality oversight. We manage the install from design to practical completion.
Validation
Testing, witnessing, and performance verification. We make sure the system performs as designed before it goes live.
Handover
O&M manuals, training, and clear documentation. Your facilities team will know the system as well as we do.
What we do
Office Fit-Out
Design and management of HVAC, electrical coordination, and plumbing integration for commercial fit-outs. From shell to signed-off.
Healthcare & Care Homes
HVAC design and system oversight for comfort, safety, and compliance. Energy-efficient upgrades tailored to care environments.
Retail
Design and management of climate and ventilation systems for retail environments. Consistent temperatures for goods and people.
BMS & Controls
Building Management System design, specification, and integration oversight. Controls logic that matches design intent.
Built on engineering, not outsourcing.
GB4 Mechanical Ltd was founded on a simple principle: do the thinking in-house. From heat gain calculations to CAD detailing, design development, and build oversight, we keep the technical accountability under our own roof.
That means no information lost between designer and installer, full accountability from first sketch to final sign-off, and faster problem-solving when it matters on site.
Why that matters
- We do our own calculations
- We do our own CAD
- No subcontracting the thinking
- Single point of technical accountability
Design
In-house calculations & CAD
Build
Managed delivery & oversight
Validate
Testing & performance proving
Handover
O&M, training & documentation
Let's talk about your project
Phone
Address
The Winding House
Cannock Chase Enterprise Centre
Hednesford, Staffordshire
WS12 0QU