40+ YEARS EXPERIENCE
ONLINE SUPPORT
FAST TURNAROUND
Part A Building Regulation submissions
Loft Conversion & Home Extension Structural Calculations
Looking to convert your loft? We provide professional structural calculations tailored for Building Control approval - covering steel beams, floor joists, and roof support design.
Every structural calculations package can include:
Steel Beam Design (e.g. ridge, floor, dormer support)
Timber Joist Layouts & Checks
Roof Rafter and Purlin Design
Padstone and Bearing Wall Specifications
Load Assessment and Structural Notes
Optional Foundation Review (if required for new loads)
*Prices are for guidance only. Final cost depends on the scope of work, site size, and location.
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
1
quick and easy online structural calculations service
Fast Turnaround Structural Calculations Service for Loft Conversions & Home Extensions across the UK
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Loft Design Structural Calculations
At Loft Designs, we specialise in accurate, cost-effective structural calculations for loft conversions-covering steel beams, timber joists, and roof supports. Our designs ensure fast approval with Building Control across England & Wales.
Designed for Loft Conversions
Whether you're removing a load-bearing wall or undertaking a full loft extension, we specialise in structural calculations specifically for loft conversions—from ridge beams to floor joists and dormer supports.
Fully Compliant & Accepted by Building Control
Our loft structural designs meet all British Standards and Eurocodes and are accepted by Local Authority Building Control (LABC) and Approved Inspectors across the UK.
Accurate, Buildable Calculations
We use trusted structural engineering software to deliver precise loft-specific calculations—making it easy for builders, architects, and Building Control to follow and approve.
Specialists in Loft Structure Design
With decades of combined experience in loft structural calculations, our team provides compliant, reliable, and build-ready designs tailored to your conversion project.
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.