House extension calculations
Structural design for single storey extensions, double storey extensions, rear extensions, side returns and wraparound extensions.
London structural engineering support
Structural Calculations Building Regulations London
Fast, professional structural calculations and drawings for London extensions, loft conversions, wall removals and Building Control approval.
Londonstructural calculations specialists
Part ABuilding Regulations support
Fastclear calculation packages
Freeinitial quote and advice
Safe, compliant structural design
Structural calculations for London Building Regulations approval
If your project affects the structure of your home, Building Control will normally need structural calculations to prove the work is safe, stable and compliant.
We prepare clear structural calculation packages for house extensions, loft conversions, load-bearing wall removals, new openings, foundations and structural supports across London.
Our service is built for homeowners, architects and builders who need accurate calculations, practical drawings and a smooth route through Building Regulations.
- Extension structural calculations for single and double storey builds
- Load-bearing wall calculations for steels, beams and openings
- Loft conversion, roof, floor and foundation calculations
- Structural drawings and reports ready for Building Control review
What we provide
Our structural calculation services
We provide the technical design information needed to support Building Regulations approval and safe construction.
Load-bearing wall removal
Beam calculations and structural details for removing walls, opening kitchens, installing bifold doors or creating open-plan layouts.
Loft conversion calculations
Roof, floor, steel beam and load analysis for loft conversions, dormers and structural alterations to existing homes.
Foundation calculations
Foundation design for extensions, new load paths, retaining walls and projects where ground conditions or extra load need checking.
Structural drawings
Clear construction drawings and details for builders, architects and Building Control officers to review and use on site.
Building Control support
We help answer structural queries from Building Control so your approval process can move forward with fewer delays.
Why calculations matter
Why structural calculations are essential
Structural calculations show how your building will safely carry loads after changes such as an extension, new steel beam, loft conversion, wall removal or foundation alteration.
They are a key part of Building Regulations compliance, especially under structural safety requirements. Without the correct calculations and drawings, your project can face Building Control delays, costly redesigns or problems during construction.
- Prove the structure is safe, stable and suitable for the proposed work
- Help Building Control review your project with the right information
- Give builders accurate steel, beam, foundation and connection details
- Reduce risk of mistakes, delays, rework and unexpected costs on site
Our process
From plans to Building Control submission
We keep the structural design process clear, practical and focused on helping your project move forward.
Consultation & plan review
We review your drawings, proposed work and Building Control requirements to confirm what calculations are needed.
Site visit if required
For projects that need closer inspection, we can assess existing walls, beams, supports, openings and site constraints.
Load analysis & design
Our engineers calculate loads, beam sizes, supports, foundations and structural elements using recognised standards.
Drawings & calculation report
You receive a clear structural package for your builder, architect and Building Control officer.
Building Control support
If Building Control asks structural questions, we help respond and provide clarification where needed.
Construction guidance
Your builder receives practical structural information so the approved design can be followed correctly on site.
What is included
Complete structural design package for your project
Every project is different, but our aim is always the same: provide accurate, buildable structural information that supports approval and helps your contractor work safely.
- Structural calculation report covering loads, beams, supports and foundations
- Structural drawings and details suitable for builders and Building Control
- Design for extensions, loft conversions, wall removals and large openings
- Clear communication with your architect, builder or Building Control officer
Why work with us
London structural calculations with clear advice
We combine technical structural engineering with practical construction knowledge, so your calculations are not only compliant but also buildable.
Building Regulations focus
Our packages are prepared to support Building Control review and structural safety compliance.
London project knowledge
We understand common London homes, tight sites, extensions, lofts, older walls and local approval expectations.
Clear deliverables
You receive drawings and calculation reports that builders and Building Control can understand.
Practical design
We look for safe, efficient structural solutions that make sense for your build and budget.
Fast turnaround
Most straightforward residential projects can be prepared quickly once drawings and site details are available.
Peace of mind
You get professional support before construction begins, reducing uncertainty and avoidable site issues.
Related support
Need more than calculations?
Structural calculations often sit alongside planning, design and project management. We can connect your structural design with the wider extension process, from drawings through to construction.
Explore our Design & Build Extensions London, Planning Permission Extensions London and Project Management Extensions London services for complete support.
Questions homeowners ask
Structural calculations Building Regulations London FAQs
What are structural calculations?
They are engineering analyses and drawings that show how loads are managed in your building. In other words, they mathematically prove that every beam, column and foundation is strong enough for the intended use. These calculations must comply with UK Building Regulations and Eurocodes.
When do I need structural calculations?
Any time you alter your home’s structure. For example, adding a loft conversion, extending your house, installing a new RSJ/steel beam, or knocking through a wall. Essentially, “any work that affects the structural integrity of your property will need to be signed off” by Building Control.
Do I need Building Regulations approval?
Yes – if your project involves structural changes (extensions, lofts, wall removals, etc.), Building Regulations approval is legally required. It’s best to submit a Full Plans application with our structural calculations before work begins, so you have official sign-off on your plans. Skipping approval can lead to enforcement: the council may demand alterations or issue fines if unsafe work is done.
Can I do the calculations myself?
It’s strongly recommended to use a qualified structural engineer. DIY calculations often miss critical factors. A chartered engineer not only guarantees compliance but can respond to any questions from Building Control, making your application go smoothly.
How fast can I get the report?
We pride ourselves on quick turnaround. Once we receive your plans and site info, most standard residential calculations (e.g. a single beam removal or extension) are completed within 24–72 hours. More complex projects (multiple alterations, large extensions) may take longer, but we always commit to a clear timeline in advance.
Why should I choose you over others?
Our London-based team combines technical excellence with personal service. We’re fully accredited, insured, and offer fixed transparent fees. We tailor our work to London’s specific building control requirements, and include all post-submission support. In short, we make the process stress-free – you get the calculations you need to get Building Control approval, without hassle.
What is included in a structural calculation package?
A typical package includes a calculation report, structural drawings, beam or foundation design, connection details and information required by your builder and Building Control officer.
Do I also need planning permission?
Structural calculations and planning permission are separate. Some projects need both, some need Building Regulations only. We can advise how the structural package fits into your wider extension approval route.
Start with clear advice
Request a free structural calculations quote
Tell us about your extension, loft conversion, wall removal or structural alteration and we will advise what calculations and drawings are required.
- No-obligation first conversation
- Clear advice for Building Regulations and Building Control
- Support for homeowners, architects and builders across London
London
Safe
Approved
Get your free quote
Complete the form and our team will contact you to discuss your structural calculation requirements.
No pressure. No obligation. We reply within 1 working day.
Ready to get your structural calculations approved?
Speak with our London team about Building Regulations structural calculations, drawings, beam design, foundations and Building Control support.