Structural calculations for extensions
Unlock your home’s potential with precise structural calculations for extensions from Calcs-Online. Whether you’re planning a single-storey or multi-storey extension, our expert team ensures your project is safe, compliant, and built to last.
- Worked remotely by structural engineers
- 100% approval, or your fee refunded
- 9,000+ projects since 2012
Used by architects, builders and homeowners
Extend your space, enhance your lifestyle
Why choose Calcs-Online for structural calculations for extensions?
1. Worked from your drawings
Every extension project is unique, and our calculations reflect that. We adapt our services to meet your specific needs, ensuring structural stability and compliance at every stage.
2. Comprehensive engineering expertise
From load-bearing wall adjustments to foundation design, our structural engineers deliver calculations that meet the highest standards for safety and reliability.
3. Approved, or your fee back
With a 100% approval rate on 9,000+ projects since 2012, we simplify the building regulations process. If building control does not approve your calculations, we refund the fee.
4. Delivered on the day you pick
Pick the delivery day from the calendar that comes with your price; each day shows its own price.
What do structural calculations for extensions include?
- Load-Bearing Wall Analysis: Ensures structural integrity when walls are removed or modified.
- Foundation Calculations: Verifies that your foundations can support the additional load of the extension.
- Material Specifications: Provides recommendations for steel, timber, and concrete to balance cost, strength, and efficiency.
- Compliance Documentation: Calculations written to UK building regulations, ready to submit to building control.
Simplifying your home extension journey
Extending your home should be exciting, not overwhelming. With Calcs-Online you see your price before you pay, you pick the day the calculations arrive, and if building control does not approve them, we refund the fee.
We eliminate the guesswork
- Your extension, worked out: calculations for the extension you are building, from your drawings.
Start your extension project today
Whether you’re expanding your kitchen, adding a new living space, or creating a multi-storey addition, Calcs-Online provides accurate structural calculations for extensions to ensure your project is a success.
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Get in touch before you buy.
Worked from your drawings
Calcs-Online works remotely: send the plans and photos, and the calculations come back ready for building control.
Approved, or refunded
Our structural calculations have a 100% approval rate across 9,000+ projects since 2012. If yours are not approved, we refund the fee.
Frequently asked questions
What do structural calculations for an extension include?
Our calculations cover load-bearing walls, foundation strength, and material specifications to ensure your extension is safe and compliant.
Can I use existing foundations for my extension?
This depends on the condition and strength of your current foundations. Our engineers will assess whether they are suitable or if new foundations are needed.
How do structural calculations affect the design of my extension?
Structural calculations provide the necessary framework to ensure your extension design is both functional and safe.
When will I get my structural calculations?
On a day you pick yourself. Your price comes with a calendar, and each date on it shows what it costs, so you choose the day that fits the work.
Do you need to visit my home for structural calculations?
No. Calcs-Online works remotely, from your drawings and photographs, and does not visit site. Building control has approved every set of calculations Calcs-Online has issued; if yours were refused, we would refund the fee.
What do I need to do to get structural calculations
To ensure precise structural calculations, we ideally need detailed architectural drawings. However, for simpler projects, basic sketches and photos may suffice. Calcs-Online works remotely and does not visit site, so the drawings and photos you send are what we work from.