Are you seeking alternative house extensions in London? If so, then our steel frame house extensions in London could be the answer you’ve been looking for. We take pride in accurate manufacture, swift delivery and quality results for our house extensions in London. For house extensions in London that exceed your expectations, get in touch with us today.
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What are steel frame extensions?
Here at Steel Frame Buildings Ltd, we use steel as the main construction material for our house extensions in London. This means that our house extensions in London offer several benefits over traditional ‘bricks and mortar’ construction methods. When you choose our house extensions in London, you can enjoy durable, robust and long-lasting results. What’s more, our house extensions in London are lightweight which facilitates fast installation.
What do our extensions in London include?
Is your family outgrowing your home? Perhaps you need more space to entertain? Or maybe you want to establish an office to work from home? Whatever you need, our steel frame house extensions in London are the answer. We provide quality house extensions in London that are affordable and can take your project to completion with ease.
Our house 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 house extensions in London include, please don’t hesitate to get in touch with Steel Frame Buildings Ltd today!

Our Range of Steel Frame House Extensions in London
The Blackmore House Extensions in London Range Styles
The Blackmore House 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 House 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 House 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 House Extension in London (7x3m Frame)
- Walls & Roof Frame = £TBC
- 7x3m Ground-Screws Layout = £TBC
- 7x3m Floor Frame = £TBC
See how our steel frame house extensions in London can take your project to new heights and get in touch with Steel Frame Buildings Ltd today for more information.
Self-Build Tool for House Extensions in London
If you want to try your hand at a DIY house extension in London, our step-by-step ‘self-build guide’ makes the process simple. 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 House Extensions in London
Fast & Efficient
Does your project for your house extensions in London have time constraints? If so, then our house extensions in London boast speed and efficiency at every point.
Light Gauge Construction Steel
Our house 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 manufacture.
Accuracy to Within 0.5mm
Our house extensions in London are manufactured to within 0.5mm accuracy. This 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 house extensions in London are made from 96% steel for an eco-friendly option.

Steel Frame House Extension sin London – FAQs
Do steel frame extensions need planning permission?
Our house extensions in London are available up to 30 sqm in line with permitted development. Our London steel frame house extensions comply with building regulations and standards, to ensure they meet the necessary standards for stability and longevity.
How much do house extensions in London cost?
The cost of steel frame house 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 house 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 house extensions in London?
Expertise
We have provided house extensions in London to our customers and trades people since 2018.
Bespoke Services
Our house 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.
Get in touch with Steel Frame Buildings Ltd today for more information about our quality house extensions in London!