Welcome to Steel Frame Buildings Ltd, your specialist for extensions in Kent – made from steel. Our extensions in Kent are manufactured with efficiency and delivered swiftly so we never delay your project. This means that you will be more than satisfied with the results of your extensions in Kent. Give us a call today for more information about our quality extensions in Kent.
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What are steel frame extensions?
Our extensions in Kent use steel as the main construction material. This means that our steel extensions in Kent offer several advantages over traditional construction methods. Our extensions in Kent are proven to be long-lasting and durable, even in the face of adverse weather conditions. Furthermore, our extensions in Kent are lightweight, yet robust, enabling fast installation that lasts.
What do our extensions in Kent include?
Whether you’re looking for extensions in Kent to add a living room, playroom or office, we have the answers. Our extensions in Kent are cheaper than traditional construction methods, yet never compromise on quality. We can take your project from quotation to completion with ease.
Our range of extensions in Kent 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.
If you’d like more information about what our extensions in Kent include, please don’t hesitate to get in touch with us today!

Our Range of Steel Frame Extensions in Kent
The Blackmore Extensions in Kent Range Styles
The Blackmore Extension in Kent (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 Kent (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 Kent (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 Kent (7x3m Frame)
- Walls & Roof Frame = £TBC
- 7x3m Ground-Screws Layout = £TBC
- 7x3m Floor Frame = £TBC
If you’re ready to begin your project with Steel Frame Buildings Ltd, please don’t hesitate to give us a call today for your quote for extensions in Kent.
Self-Build Tool for Extensions in Kent
Do you want to try a DIY project for your extensions in Kent? Well, 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 Kent
Fast & Efficient
Speed and efficiency are two of our priorities when it comes to our extensions in Kent. This means that we will keep your project on track with no delays.
Light Gauge Construction Steel
Our extensions in Kent are manufactured using high-quality light gauge steel. This means that your extensions in Kent are protected against corrosion, weather damage and more.
Accuracy to Within 0.5mm
We take pride in manufacturing extensions in Kent to within 0.5mm. This accuracy means that your extensions in Kent will be made to suit your exact specifications.
Sustainable Methods
When you choose us for extensions in Kent, you are choosing sustainable methods. Our extensions in Kent are made from 96% steel for an eco-friendly option.

Steel Frame Extensions in Kent – FAQs
Do steel frame extensions need planning permission?
Our extensions in Kent are available up to 30 sqm in line with permitted development. Our Kent 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 Kent cost?
The cost of steel frame extensions in Kent 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 Kent. 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 Kent?
Expertise
We have provided steel frame extensions in Kent to our customers and trades people since 2018.
Bespoke Services
Our steel frame extensions in Kent 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 Kent, please don’t hesitate to get in touch with Steel Frame Buildings Ltd today!