Structural Calculations for Domestic Projects
Planning a home extension? Removing a load-bearing wall? Converting your loft or reconfiguring rooms? Whatever your project, Loft Designs provides the structural calculations you need to ensure your renovation is safe, compliant, and approved by Building Control.
Our team works with homeowners across the UK to deliver accurate, fast, and fully certified calculations that take the stress out of structural design.
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Get the Right Support for Your Home Project
You don’t need to be an expert — that’s our job. We’ll guide you through the structural requirements of your project and provide:
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Steel beam calculations (for extensions, knock-throughs, RSJs)
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Timber and flitch beam designs (for lofts, roofs, or floors)
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Concrete beam and foundation support (for new builds or retaining walls)
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Structural support for removing walls or chimney breasts
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Calculations for open-plan layouts, bi-fold openings, and more
Simple Online Submission
Getting your structural calculations is easy. Just email your architectural plans and supporting details using our online submission form, and our team will create a bespoke structural plan tailored to your home conversion.
Fast Responses & Quick Turnarounds
We reply to all enquiries quickly—no frustrating delays. Once you approve your quote, we book your project and start working on your beam calculations for extensions and loft conversions, full structural plans, and any other requirements.
Structural Calculations for Loft Conversions, Extensions & New Builds
Loft Conversion Structural Calculations
Our loft conversion structural calculation packages include everything needed for Building Control approval, material ordering, and builder reference. Simply provide architectural plans or a measured survey, and we’ll handle the rest.
Our calculation pack includes:
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Steel beam calculations for loft extensions and roof support, including padstone/bearing plates, splice calculations, and fabrication details
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Floor joist calculations, including trimming joists
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Rafter and roof modification calculations
Structural Calculations for Home Extensions
A home extension is a great way to add space—whether it’s a larger kitchen, additional bedrooms, or an open-plan living area. Our team provides precise structural calculations for extensions, ensuring compliance with Building Control regulations.
We offer:
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Steel beam calculations for single and double-storey extensions
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Load-bearing wall assessments and modifications
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Foundation and floor structure calculations
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New Build Structural Calculation Packages
For new build dwellings, we offer comprehensive structural calculation packs to support your Building Control approval. All we need is your architectural plans and Phase 2 site investigation report.
Our full new build calculation packages include:
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Foundation calculations
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Masonry or timber-framed wall calculations
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Floor calculations
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Roof calculations
We deliver reliable solutions for residential loft conversions, attic conversions, home extensions, and internal alterations
Structural Calculations Suitable for Part A Building Regulation Submissions
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40+
Backed by over 40 years of structural engineering experience
50+
Team members enabling engineering across the UK
1000+
Residential, commercial & industrial projects nationwide
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quick and easy online structural calculations service
What Our Clients Say
A Fair Price
Always helpful, punctual delivery of designs & at a fair price. A pleasure to be associated with Loft Designs.
Brooks Building Plans
Helpful and Efficient
Loft Designs have been working on my projects for over 8 years, they are extremely helpful and efficient in finding cost effective structural solutions to my architectural projects.
Tony Angeletta Architect
Cannot Fault their Service
I have worked with Loft Designs for a couple of years now and cannot fault their service. They are always happy to help and I look forward to working with them going forward.
Steven C.
This is a very reliable & professional…
This is a very reliable & professional company with excellent service and very prompt in providing assistance !
L.Bin
Loft Designs A+
I have used Loft Designs on many projects and on each time they have delivered both in quality and costs. They always happy to help with any queries. I would highly recommend.
Bobyas
Professional & Knowledgeable
I couldn't be more happy with the service received from Loft Designs. From start to finish, their team was professional, knowledgeable, and attentive to every detail.
Mr. J. Snitzer
Practical, Cost-Effective
Finding a structural engineer who truly understands the needs of our community isn’t easy, but Loft Designs does exactly that. Their experience with local properties and commitment to delivering practical, cost-effective solutions makes them the go-to choice for structural design.
S. Oppenheimer
Smooth & Stress-free
After researching several companies for our loft conversion project, we decided to go with Loft Designs, and we're so glad we did. Their expertise in structural engineering and their solutions made the entire process smooth and stress-free.
M.Reece
Incredibly Easy
Loft Designs made the experience of a loft conversion less stressful. They provided a design which ensured it was structurally sound and compliant with all regulations.
T.Syed
Frequently Asked Questions
Loft Designs is an online service, offering structural calculations for loft conversions across the UK.