Structural Calculations for Domestic Extensions

Extending your home is a popular way of gaining extra living space, be it a bigger kitchen area or additional bedrooms for a growing family. Building an extension to your existing home brings a whole new life to the building. It also means, in many cases, you won’t have to move house and can stay where you are in comfort.

The initial planning stage of any building work is vital. To enable the project to be completed to the highest standard, with the best outcomes possible, it’s important to get your plans absolutely accurate. This includes many considerations necessary to comply with building regulations and also the steel beam calculations for extensions.

In most instances, structural supports are required to support load-bearing walls and floors above when alterations are taking place on the ground floor. This is to ensure the safety of your new living space and is also a requirement to meet current building regulations.

Steel Beam Calculations for Extensions

If large panels of masonry are being removed, in certain cases, extra steel support is required for the lateral stability of the building. Additionally, steel supports may be required to support new floor joists or roof structures. Building Control often require checks on new or existing masonry walls, piers and foundations which are supporting new steel beams and thus carrying an additional load than they had previously. It’s vital to have the correct beam calculations for extensions when planning and building.

We have vast experience in designing steel beam calculations for extensions of all sizes. Simply email us a PFD copy of your architectural plans, or measured survey sketches in a recognised scale. We can also work from AutoCAD drawings. Using this information we can provide you with a competitive fee quote for your unique scheme. Every project is very different. That’s why our experts work on each project to provide unique beam calculations for extensions and the vital considerations for your new space.

In the example below, we were engaged to calculate steel supports for the rear of the building. This was to enable our client to achieve an open plan layout, maximizing the internal space.


How do I pay?

You can pay for your bespoke quote using secure online payment (we accept all major credit and debit cards). Alternatively you can pay via BACS bank transfer, or via PayPal.

Can I see a sample document before purchasing?

Your bespoke structural calculations can be provided in PDF and Autodesk formats, according to your requirements.

For an example of our PDF calculations, click here.

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Everything you need for Building Control Approval

Calculations provided in an industry-recognised format. Perfect for your builder to understand

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Our 5 easy step process

1 Step 1 Send us your project requirements

Simply upload your architectural plans or measured survey sketches to our team of qualified professionals via our easy to use form.

2 Step 2 Bespoke Quotation

Our trained professionals will carefully review your project requirements and provide you with a bespoke, insurance backed quotation.

3 Step 3 Review quote, appoint uk

Once you're happy with your quotation, confirm our appointment, upon commencement of your scheme you will receive an invoice. Pay using one of our quick and secure options including BeamCalc's secure online payment system, BACS or PayPal.

4 Step 4 Bespoke Structural Calculations

Our experienced building engineers will tailor your structural calculations to your project requirements, to meet local authority building control approval.

5 Step 5 Receive your Bespoke Structural Calculations

Within the agreed timescale we provide you with insurance backed, tailored structural calculations in a PDF format.

Get Your Calcs

Please ensure you provide us with both existing and proposed plan and elevation drawings (sections if available) to a recognised scale or fully dimensioned measured survey sketches in either PDF or CAD format.

It is important that you provide us with detailed plans, measured survey sketches and supplementary supporting information. This enables us to assess your project holistically and give you a fee proposal which is accurate to your requirements. 

Please do not send us screen grabs or photographs as we will simply not work from this information. We will not accept links to assess plans as we take our own security and the security of our clients seriously.

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Structural Calculations for Bi-Folding Doors A group of builders working on an extension A house extension

We can provide you with the required steel beam calculations and pad stone calculations for your project for Building Regulation approval.


Contact us today for your realistic fee proposal.

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