How could premium-quality, steel-constructed extensions in London elevate your project? Why not choose Steel Frame Buildings Ltd and find out today? Our extensions in London boast efficiency, durability and affordability. We’re confident that you will be more than satisfied with the results of your extensions in London. Contact us for more information about our quality extensions in London.
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What are steel frame extensions?
Our extensions in London are innovative as they use steel as the main construction material. Due to this, our extensions in London provide several benefits over more traditional construction methods. Our extensions in London are durable, robust and long-lasting, even when facing adverse weather conditions. Additionally, our extensions in London are lightweight and robust, facilitating fast installation that lasts.
What do our extensions in London include?
Whether you need extensions in London to extend your kitchen, or lounge or to add a playroom, we have the solutions. Our extensions in London never compromise on quality, despite being cheaper than other construction methods. This means we can take your extensions in London from inception to completion with seamless ease.
Our extensions in London boast many inclusions:
- 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 what our extensions in London include, please don’t hesitate to get in touch with Steel Frame Buildings Ltd today!

Our Range of Steel Frame Extensions in London
The Blackmore Extensions in London Range Styles
The Blackmore Extension in London (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 in London (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 in London (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 in London (7x3m Frame)
- Walls & Roof Frame = £TBC
- 7x3m Ground-Screws Layout = £TBC
- 7x3m Floor Frame = £TBC
Are you ready to start your project with Steel Frame Buildings Ltd? If so, please don’t hesitate to get in touch with us today for your quote for extensions in London.
Self-Build Tool for Extensions in London
Why not try a DIY project for your extensions in London? If this appeals, it’s 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.
The Benefits of Steel Frame Extensions in London
Fast & Efficient
If your project for extensions in London has time constraints, don’t worry. Our extensions in London boast speed and efficiency when it comes to manufacture and delivery.
Light Gauge Construction Steel
Our extensions in London are highly resistant to corrosion, weather damage, rot and more. This is due to the high-quality light gauge steel we use for construction.
Accuracy to Within 0.5mm
We manufacture extensions in London to within 0.5mm accuracy. This attention to detail means that your extensions in London will be manufactured to your exact specifications.
Sustainable Methods
When you choose us for extensions in London, you are choosing sustainable methods. Our extensions in London are made from 96% steel for an eco-friendly option.

Steel Frame Extensions in London – FAQs
Do steel frame extensions need planning permission?
Our extensions in London are available up to 30 sqm in line with permitted development. Our London steel frame extensions comply with building regulations and standards, to ensure they meet the necessary standards for stability and longevity.
How much do extensions in London cost?
The cost of steel frame extensions in London 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 extension?
We offer fast manufacture and swift delivery for our steel frame extensions in London. We minimise disruption and keep your project on track. Contact us for a more accurate timeline tailored to you.
Why choose us for your extensions in London?
Expertise
We have provided steel frame extensions in London to our customers and trades people since 2018.
Bespoke Services
Our steel frame extensions in London 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.
For more information about our extensions in London, please don’t hesitate to get in touch with Steel Frame Buildings Ltd today!