Steel frame extensions in the UK are projects that use steel as the main construction material. Our UK steel frame extensions boast several advantages over traditional construction methods. They are known for their strength, resilience to harsh weather conditions and durability. What’s more, our steel frame extensions UK are lightweight, yet robust, allowing for fast installation that lasts.
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What do UK steel frame extensions include?
Are you ready to expand your home with ease with our steel frame extensions UK? Our UK steel frame extensions offer a cheaper alternative for your extension, that doesn’t compromise quality. We take you from quotation to completion with ease so you can enjoy your new steel frame extension UK in no time.
Our range of steel frame extensions UK includes:
- Available as a ‘Frame Only’ or ‘Finished Building’.
- Opening size & type to suit your requirements.
- Soffit detail/overhang to suit your requirements.
- Available up to 30 sqm in line with permitted development.
- Available in larger sizes upon discussion.
- Delivery & frame installation available.
- Fully Bespoke including plans, dimensions and 3D visuals.
For more information about our steel frame extensions UK inclusions, please don’t hesitate to contact us today!


Our Range of Steel Frame Extensions UK
The Blackmore Extensions Range Styles
The Blackmore Extension (4x3m Frame)
- Walls & Roof Frame = £1,955 (+vat)
- 4x3m Ground-Screws Layout = £840 (+vat)
- 4x3m Floor Frame = £625 (+vat)
- 4x3m Insulated Floor Frame = £889 (+vat)
The Blackmore Extension (5x3m Frame)
- Walls & Roof Frame = £2,465 (+vat)
- 5x3m Ground-Screws Layout = £1,050 (+vat)
- 5x3m Floor Frame = £765 (+vat)
- 4x3m Insulated Floor Frame = £1,095 (+vat)
The Blackmore Extension (6x4m Frame)
- Walls & Roof Frame = £3,150 (+vat)
- 6x4m Ground-Screws Layout = £1,680 (+vat)
- 6x4m Floor Frame = £1,180 (+vat)
- 6x4m Insulated Floor Frame= £1,708 (+vat)
The Blackmore Extension (7x3m Frame)
- Walls & Roof Frame = £TBC
- 7x3m Ground-Screws Layout= £TBC
- 7x3m Floor Frame = £TBC
Ready to take your steel frame extensions UK to new heights? Don’t hesitate to give us a call today for your quote!
Self-Build Tool for UK Steel Frame Extensions
DIY Building with Light-Gauge Steel has never been easier with our step-by-step ‘self-build guide’. Whether you want to learn how to erect our frames, or how to apply cladding, fascias, and soffits, we’ve got you covered. Click here to Enter the Self-Build tool for steel frame extensions UK.
The Benefits of UK Steel Frame Extensions
Fast & Efficient
We prioritise speed and efficiency when it comes to our steel frame extensions UK. We minimise any on-site delays and keep your project on track.
Light Gauge Construction Steel
Our steel frame extensions UK are manufactured using high-quality light gauge steel. This boasts high corrosion resistance, is non-combustible and won’t warp or rot.
Accuracy to Within 0.5mm
Our steel frame extensions UK boast an accuracy of within 0.5mm. This means your steel frame extensions UK are constructed with complete attention to detail.
Sustainable Methods
Our steel frame extensions UK are made from 96% steel. This means that they reduce waste heavily and are a hugely sustainable construction method.

Steel Frame Extensions UK – FAQs
Do steel frame extensions need planning permission?
Our steel frame extensions UK are available up to 30 sqm in line with permitted development. Our steel frame extensions UK comply with UK building regulations and standards, to ensure they meet the necessary standards for stability and longevity.
How much do steel frame extensions UK cost?
The cost of steel frame extensions UK will vary depending on your specifications and requirements. Give us a call today to discuss your project and receive a tailored quote.
How quickly can I get a steel frame building?
We offer fast manufacture and swift delivery for our steel frame extensions UK. We minimise disruption and keep your project on track. Contact us for a more accurate timeline tailored to you.
Why choose us for your steel frame extensions UK?
Expertise
We have provided steel frame extensions UK to our customers and trades people since 2018.
Bespoke Services
Our steel frame extensions UK are bespoke to your needs. We include design, manufacture and more.
Cost Effective
We offer affordable prices backed by quality results for your complete satisfaction, every time.
Looking for steel frame extensions UK? If so, give Steel Frame Buildings Ltd a call for quality, affordable steel frame extensions UK!