J.Johnstone Engineering Ltd - Structural Steelwork
Structural Steelwork for Homes & Renovations in Cumbria
At J Johnstone Engineering, we provide precision-made structural steelwork for residential projects across Cumbria. Our work ranges from supplying a single RSJ steel beam for a knock-through to delivering full A-frame structures for luxury homes and barn conversions.
Based in Silloth, we have been supporting homeowners, builders, and architects throughout the region for more than 45 years. We are known for trusted, high-quality fabrication and fast turnaround times.
Structural Steel Fabrication Across Cumbria
We fabricate and supply structural steel for projects of all sizes. Our services cover RSJ beams for walls, extensions, lofts, and open-plan conversions. We design and supply A-frame roof structures that are ideal for vaulted ceilings and timber-frame homes. We also produce goalpost frames that are used to support large bi-fold doors and glazed rear extensions.
Our team manufactures custom connections and plates to your engineer’s specifications and offers on-site measuring and advice to ensure every beam and frame fits perfectly.
Whether you are building a new countryside home in Penrith, renovating a townhouse in Carlisle, or simply need a single beam for a wall removal in Wigton, we can provide the right steelwork solution.
Who We Work With
We work with builders and contractors on high-end homes and conversions. We collaborate with architects who need accurate, clean steelwork for bespoke designs. We also support self-builders looking for reliable, local fabrication services, as well as homeowners who need one or two beams delivered quickly and affordably.
No project is too big or too small. We offer competitive pricing for projects of every size and provide a local, approachable service that allows you to speak directly to our experienced team.
Fast Turnaround and Local Delivery
We understand the importance of meeting construction schedules, so we focus on efficiency to keep your project on track. We provide quick and straightforward quotations and offer fabrication times of between two to five working days, depending on the complexity of the work.
We deliver across Cumbria, including Carlisle, Workington, Wigton, Cockermouth, Penrith, Whitehaven, and surrounding areas. We also offer optional site visits and on-site measuring to ensure a perfect fit for your project.
Our Work
Over the years, we have supplied structural steelwork for a wide range of residential projects. These include kitchen extensions in Carlisle, bi-fold door support frames in Workington, barn conversions in Penrith, single-beam knock-throughs in Cockermouth, and modern A-frame roof structures in the Lake District.
See below a gallery of some of our work.
Why Choose J Johnstone Engineering
We bring over 45 years of experience in structural steel fabrication. Based in Silloth, we serve clients across Cumbria and the North West with high-precision fabrication, from drawing to delivery.
As a local, family-run business, we pride ourselves on personal service and direct communication with our customers. We are trusted by builders, engineers, and private clients alike for our reliability, quality, and attention to detail.
Fully EN1090 Certified
J Johnstone Engineering is fully UKCA marked to EN 1090 Execution Class 2, delivering certified structural steelwork across Cumbria. Based locally, we provide high-quality steel fabrication and installation for commercial, industrial, and residential projects throughout the region — all carried out to the highest UK standards for safety and compliance.
Areas We Serve
We regularly deliver and provide services in Carlisle, Wigton, Workington, Penrith, Whitehaven, Cockermouth, Aspatria, Keswick, Maryport, and all surrounding areas throughout Cumbria.
Get a Quote Today
Whether you need a single beam for a renovation or a complete steel frame for a new build, we are ready to help. No job is too small, and no location in Cumbria is too far for our dedicated team.