Structural Engineering Services in London
Planning a home improvement project?
Our experienced team of structural engineers in London provides reliable, cost-effective solutions for homeowners, builders and developers. Whether you’re extending your property, removing a load-bearing wall, or converting your loft, we deliver accurate structural calculations and drawings tailored to your project.
We provide a full range of structural engineering services across London, including:
- Structural engineer for house extension projects
- Loft conversion structural engineer services
- Knock down load bearing wall engineer support
- Steel beam calculations UK compliant
- RSJ calculations for extension works
- Structural engineer for renovation projects
- Foundation design for house extensions and new builds
- Basement conversion structural engineer solutions
- Structural calculations for home alterations
- Open plan living structural engineer design
- Wall removal structural design and support
- Structural drawings for planning permission
- Structural survey house inspections
- Structural inspection reports for property assessments
House Extensions, Loft Conversions & Renovations
House Extensions
Our structural engineers design safe and efficient solutions for rear, side, and wrap-around extensions, including foundation design and load calculations.
Loft Conversions
Need a loft conversion structural engineer? We provide beam designs, floor strengthening calculations, and full structural support for your project.
Wall Removal & Open Plan Living
Planning to remove a load-bearing wall? We provide wall removal structural design and RSJ calculations to safely create open-plan living spaces.
What’s Included in Every Project
Full structural assessment of your property and proposed works
Structural calculations for home alterations, extensions, or wall removals
Steel beam and RSJ calculations compliant with UK building regulations
Clear structural drawings for planning permission and building control approval
Site visit included where required to verify conditions and design accuracy
Free amendments to accommodate building control comments and revisions
Our Seamless Process
01
Send Us Your Plans or Project Details
Provide your drawings or outline your requirements so we can fully understand your project from the start.
02
Receive a Free Same-Day Quotation
We’ll review your information and issue a clear, competitive quote on the same day.
03
Calculations and Drawings
Our engineers complete all required structural calculations and drawings.
04
Site Visit & Free Amendments if Required
We include site visits where needed and make any necessary amendments at no extra cost to ensure building control approval.
Searching for a Structural Engineer Near Me? Let’s Get Started Today
If you’re in London and searching for a structural engineer near me, Sandstone Engineering provides fast, reliable structural engineering services for all types of residential projects.
The Benefits of Working With a Structural Engineer
Ensure your project is structurally safe
Structural engineers calculate loads, beam sizes, and support requirements to make sure walls, floors, and roofs can safely carry weight. This prevents structural failure, cracking, subsidence issues, or long-term damage to your home.
Required for building control approval
Most structural alterations (like extensions, loft conversions, and wall removals) legally require approved structural calculations before building control will sign off the work. Without them, your project can be delayed or stopped completely.
Prevent costly construction mistakes
Incorrect beam sizes, missing supports, or poor load assumptions can lead to expensive on-site changes. A structural engineer ensures everything is designed correctly before construction begins, reducing the risk of rework and unexpected costs.
Make your project buildable for contractors
Builders rely on structural drawings to understand exactly what to install on site. Clear engineering design removes guesswork, reduces site delays, and helps contractors price and build accurately.
Avoid overpaying for materials
Proper structural design ensures steel beams, foundations, and supports are correctly sized – not oversized “just in case.” This can significantly reduce unnecessary material and labour costs.
Protect yourself legally and for insurance purposes
Structural alterations without proper engineering can cause issues with insurance claims, future property sales, and liability if problems occur. Engineering documentation provides proof your work was designed correctly.
Testimonials
Structural Calculations and Drawings You Can Trust
Local councils
We prepare structural drawings and calculations that align with local authority requirements, ensuring your planning application and building works progress smoothly. Our documentation is designed to clearly communicate the structural intent of your project, reducing the risk of rejection or delays during approval stages.
Building control authorities
All our structural calculations are fully compliant with UK building regulations. We work closely with building control officers to ensure your project meets safety standards, from steel beam sizing to foundation design. If amendments are required, we provide them quickly at no extra cost to keep your approval on track.
Architects and contractors
We produce clear, practical structural information that architects can integrate directly into design plans and contractors can build from confidently on site. Our drawings and calculations are designed to be straightforward, reducing confusion, preventing errors, and helping construction run efficiently.
Why Choose Our Structural Engineers in London?
Choosing the right people matters. At Sandstone Engineering, we combine experience, practical know-how, and speed to finish your project without fuss.
Experienced in residential structural engineering
Fast, reliable service with clear communication
Competitive pricing with no hidden costs
Fully compliant with UK building regulations
FAQS
Do I need a structural engineer for a house extension?
Yes, you will usually need a structural engineer for a house extension to design foundations, calculate loads, and provide structural drawings required for building control approval. This ensures your extension is safe and fully compliant with UK regulations.
How much does a structural engineer cost in London?
The cost varies depending on the project size and complexity. Simple calculations like RSJ design may be relatively low cost, while full structural packages for extensions or loft conversions will cost more. We offer free same day quotations so you know the cost upfront.
What does a structural engineer do for a loft conversion?
A loft conversion structural engineer designs the structural elements needed to safely convert your loft. This includes floor strengthening, steel beam design, roof support calculations, and ensuring the structure meets building regulations.
Do I need structural calculations to remove a load-bearing wall?
Yes. If you are removing a load-bearing wall, you must have structural calculations completed by a qualified engineer. These calculations determine the correct steel beam (RSJ) needed to safely support the load above.
What are RSJ calculations and why are they needed?
RSJ calculations (Rolled Steel Joist calculations) determine the correct size and specification of steel beams used to support structural loads when walls are removed or altered. They are essential for safety and building control approval.
Can a structural engineer help with open plan living designs?
Yes. A structural engineer is essential when creating open plan living spaces, especially when removing structural walls. We design safe steel beam solutions that allow you to open up your home without compromising structural integrity.
How long do structural calculations take?
Most structural calculations and drawings are completed within two weeks. Larger or more complex projects may take slightly longer, but we always aim for fast turnaround times to keep your project on schedule.
Do I need a structural engineer for building control approval?
Yes, building control will usually require structural calculations and drawings before approving structural works such as extensions, loft conversions, and wall removals. We ensure all documents meet their requirements.
What is included in structural drawings?
Structural drawings typically include beam layouts, load-bearing details, foundation design, connection details, and construction notes. These are used by builders and submitted to building control for approval.
Can you provide structural drawings for planning permission?
Yes, we provide structural drawings for planning permission where required. While planning permission focuses on design and appearance, structural drawings support the technical approval process when needed.
Do I need a structural survey before buying a house?
A structural survey is recommended if you are concerned about cracks, movement, or potential structural issues. It helps identify problems before purchase and can prevent costly surprises later.
Can a structural engineer inspect cracks in my house?
Yes. We provide structural inspections for cracks, subsidence concerns, and structural movement. We assess whether the issue is cosmetic or structural and advise on the necessary repairs.
Do you need a structural engineer for a basement conversion?
Yes, basement conversions require specialist structural engineering due to the complexity of excavation, retaining walls, and load support. Detailed structural design is essential for safety and approval.
How quickly can I get a quote?
We offer free same day quotations for all structural engineering services. You can send us your drawings or project details and receive a no-obligation quote quickly.
Do you visit the site before designing?
Yes. Site visits are included in all quotations where required. This ensures accurate measurements, proper assessment of existing structures, and reliable engineering design.
Can you amend drawings if building control requests changes?
Yes. We offer free amendments to structural drawings and calculations to accommodate building control feedback, ensuring your approval process is as smooth as possible.
Projects

Project 323 – Waldegrave Road
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Project 280 – Barn Hill
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Project 492 – Bideford Road
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