Springfield Steel Buildings Logo

Building Extension



Steel Building Extension for sale supplied by Springfield Steel Buildings.

Introducing our Steel Building Extension — the perfect solution for all your industrial and commercial needs. Engineered by a team of qualified structural engineers and compliant with BS5950 Part 5, our extensions are designed to deliver exceptional performance and value for over 20 years. Made from galvanized, cold rolled steel, our extensions designs offer superior strength, durability, and reliability. They are perfect for a wide range of applications.

What is a Building Extension?

A building extension is an additional structure that expands the existing space of a building. It can be added to homes, industrial facilities, or commercial properties to create extra rooms, storage areas, offices, or production spaces. Building extensions are typically constructed from durable materials like steel to ensure longevity and reliability. They offer a cost-effective solution for increasing the usable area without the need for a new building.

What can I use a Building Extensions for?

  • Home Extensions: Add extra rooms, a garage, or a workshop to your home with a robust and stylish steel extension.
  • House Extensions: Expand your living space with additional bedrooms, living areas, or a conservatory.
  • Industrial Extensions: Increase your operational capacity with additional warehouse space, production areas, or storage facilities.
  • Business Expansion: Grow your business with added office space, retail areas, or storage rooms.
  • Agricultural Extensions: Extend barns, create additional livestock shelters, implement storage areas, or expand machinery storage.
  • Educational Institutions: Add classroom extensions, laboratories, administrative offices, or recreational facilities.

Our steel framed extensions meet the highest industry standards, ensuring they are suitable for various uses in your business operations. Additionally, we offer fully customisable options, including specific dimensions and roller door access, to perfectly fit your needs. Get a bespoke expansion solution at no extra cost by filling out our quote form.

Contact us today to get your custom steel extension build designed and installed!


What do I get with my Building Extension?

The Industrial Extension Structure

  • Cold Rolled Steel Structure, L:15M x W:12M x H:4M with a roof pitch of 10 degrees.
  • 1 x Roller Door Opening at 3.5mx3.5m and 1 x Personnel Door Opening providing optimal space for vehicle and pedestrian access.
  • Single Skin 0.5mm Wall Cladding in an array of colour options.
  • Single Skin 0.7mm Roof Cladding with Anti-Condensation Barrier in an array of colour options.
  • 1 x open bay on the Rear Gable.
  • Rooflights spaced at 1 per bay, providing natural lighting to reduce potential electrical running costs.
  • Plastisol Coated Galvanised Steel Flashings in an array of colour options.
  • Plastisol Coated Galvanised Steel Guttering System designed to collect water and keep your building leak free.
  • All fasteners and fixings for Frame, Cladding and Doors included.

The Extras

  • Technical 2D CAD Drawings and Installation video included.
  • A 4k high resolution 3D visualisation useful for planning application or development advertising.
  • Structural Frame Calculations included.
  • Free Delivery is UK wide, Based in England, Scotland and Wales.


  • Our Steel Extensions are designed for non coastal locations at altitudes up to 100.
  • We can order and supply your building extension ASAP with a delivery time of 6-8 weeks. If customisations are needed we can provide a quote same-day.
  • All Steel Frame Extensions are designed to Industrial Standards BS5950 part 5.
  • All prices Exclusive of VAT and for supply only.

Additional information


Anthracite, Merlin Grey, Other Options Available


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Related Products

Springfield Steel Buildings Logo

Get your free quote!

Fill out the form below, and we will be in touch shortly.

Contact Information
Building Information
Where did you hear about us?

Not What You're Looking For?

We do bespoke buildings too! built to your site, your needs and to your budget, no hassle quoted today.