

Welcome to Capital Steel Buildings
Capital Steel Buildings, the UK`s leading designer and supplier of cold formed steel buildings, supplied, delivered and erected nationwide. CSB design buildings exactly to your specification, fully compliant with British Standards. We have experienced distributors throughout the UK who will organize the design, supply and erection of your bespoke steel building, taking the project from start to finish.
As the first UK cold formed steel building supplier to be accredited the now UKCA mark, we pride ourselves on the fact all of our steel structures are appropriately engineered to the site location and wind zone producing the strongest, most robust and durable structure optimized for that location.
Our steel buildings are not supplied from stock but each is designed bespoke to the customer’s requirements. So whatever the customer needs, CSB will have a solution, whether it be a small domestic steel garage or a large industrial steel unit. Kits are delivered within 4 weeks of order placement to any location within mainland UK.
An assembly guide is provided with each kit and so it feasible for a competent customer to self-erect. Alternatively, our distributor will provide a turn-key project assisting with planning, building control, groundworks and erection.
Call us today on 0141 404 9360 to discuss your steel building requirements, to get a quote or to discuss becoming a distributor.







CAPITAL STEEL BUILDINGS – the best of the best
In July 2014 Capital Steel Group was awarded its CE accreditation for design protocol, the first company in the cold formed kit building market to do so. This was the culmination of years of investment and effort to gain market acceptance of our innovative approach to portal frame design and made us leaders in our field
Why are CSL the Market Leaders in our field?
What distinguishes CSL from all our opposition is the research, testing and development that have been conducted on our frames to give confidence to ourselves and a skeptical industry that correctly designed, cold formed steel structural frames are as competitive and fit for purpose as hot rolled.
We are at a turning point in this industry and the award of the CE Mark in 2014 and UKCA Mark in 2021 was the next stage in the process.
However, I feel you need to understand a little more the background that has led us to this point and sets us apart from our competitors It is our investment in research and testing

Research on moment resisting joints
2007 – EPSRC CASE Award for PhD project ‘Stressed skin effects on cold-formed steel portal with semi-ridged joint’ by Mr Andrzej Wrzesien, currently R&D Manager at CSL
Our Research and Development Manager, Andrzej Wrzesien joined our engineering team full time at the start of 2014 after completing his PhD and a two-year Knowledge Transfer Partnership (KTP) between ourselves and Queens University, Belfast. A KTP is a three-way project between an academic, a business and a recently qualified person (known as the Associate).
The KTP works with over 140 universities, further education (FE) colleges, and research and technology organizations (RTO) across the UK, which translates into over 450 university departments. That includes all Research Excellence Framework (REF) rated departments, covering a wide range of academic disciplines – including engineering, computer sciences, physics and mathematics, management, social sciences and the arts.
Andrzej and CSL were awarded a Certificate of Excellence for an Outstanding project which less than 5% of KTPs achieve. We are also contenders for a National prize in 2015. CSL sponsored Andy through his Phd and over the past 7 years he has tested all the key components that make up our frames culminating in a full scale test to failure of an assembly in the lab at Strathclyde University
Our structural checking engineer is Dr Asraf Uzzaman. Ash was sponsored through his PhD by CSL and in association with Strathclyde University, Glasgow and he too gained an Outstanding award. He is a specialist in Finite Element Analysis – computer modelling to the layman.
Projex
Our buildings are designed using our own cutting edge, in-house structural and detailing software. Our kit components have been tested and validated by our Engineers and research partners. These include: Strathclyde University, Queen’s University and Trinity College. We take pride from our awards for Engineering Excellence in our Knowledge Transfer Partnerships (KTPs) with these institutions.
Our distributors use our state-of-the-art software to
quickly produce quotations, drawings, and engineering
information. CSB’s software allows an easy to use
development and buying structure for both our
distributers and their consumers. They are also able to
provide structural calculation packs for each bespoke
design. You are assured of a fast, efficient and
personal service.
Free Quotations
Our UK-wide distributers can provide FREE quotations on any of our CSB designed buildings. We
have a wide range of building types, styles, insulation and door options to choose from, not only can
our distributers design buildings fit for your need, the process is quick,
easy and free to engineer. Our CSB engineers have done all the hard
work for you, and are there to assist our team members through any
design queries. All quotations provided using our software are fully
engineered and CE compliant structures, bespoke, fit for purpose and
affordable solutions on cold formed steel buildings.
Get in touch to get a free quote on your design, and we will put you in
touch with one of our trusted, experienced and reliable distributers, in
your area.
Manufactured and Distributed UK wide
We operate through our nationwide network of authorised distributors, with
32 companies currently in the UK supplying CSB buildings. All of our
distributors offer a personal service ranging from supply only to a turnkey
project. We have a 3-4 week turn around for manufacture and delivery, and
our suppliers deliver UK wide.
All of our steel buildings are manufactured here in the UK by A. Steadman &
Son (Part of the SIG Group) who are UKCA, CE and ISO accredited, ensuring
you receive the highest quality of materials and service.
Designed to Last
Capital Steel have been supplying buildings in the UK for over 15 years. We were proudly the first
supplier in the UK to be awarded a UKCA mark for our design protocol and nominated for Innovate
UKs Best of the Best Awards 2015.
Our Distributers, manufacturers, erection teams and our engineers have a wealth of experience and
expertise to assist at all stages of your build project. Our steel buildings are designed for a 50-year
design life complete with the relevant warranties you would expect. CBS buildings are here to stay.