Expert Structural Engineers for London

✓ Loft Conversions ✓ Rear & Side Extensions ✓ Basement Design ✓ Defect & Subsidence Inspections

What is a Structural Engineer

If you are planning a home renovation or have spotted a worrying crack in your wall, you have probably been told you need a structural engineer. But what exactly do we do? In simple terms, while an architect focuses on how your building looks and flows, a structural engineer ensures it remains stable, secure, and safe. We design the unseen framework of your property so that it can safely withstand environmental conditions and everyday human use. You will typically need our structural design and inspection services if you are:
  • Extending your home: Adding a loft conversion, rear extension, or side extension.
  • Remodeling: Removing internal load-bearing walls to create open-plan living spaces.
  • Going underground: Excavating and engineering new basements.
  • Investigating defects: Requiring an expert structural inspection to review building issues, cracking, or possible subsidence.
To keep your property standing strong, we carefully consider and calculate the strength of various materials required for your specific project, such as timber, concrete, steel, and brick. We then produce the essential structural drawings and calculations that your builder needs to physically complete the work, and that Building Control requires to legally sign off on the project. We do not work in isolation. During the design process, we actively liaise with other professionals and trades to ensure your project runs seamlessly. This collaborative approach includes working closely with your Architect, Contractor, Surveyor, Project Manager, Party Wall Surveyor, and Building Control.
MSEL Loft conversion

About Us​

Formed from the successful merger of Martin Redston Associates and Martin Cooper Associates, Martin Structural Engineers is your trusted structural engineering consultancy for London and the surrounding counties.

With over 30 years of collective experience, our team of Chartered and near-Chartered Engineers has successfully completed over 15,000 projects and earned a 4.8 out of 5-star rating on Google. We specialise in providing professional, reliable engineering services for small and medium-sized projects across the capital.

From initial design to final construction, our expertise covers a wide range of residential and commercial needs. We are experts in:

  • Loft conversions and extensions: creating more space with rear, side, and multi-storey extensions.
  • Basements: designing and engineering new basement spaces.
  • Subsidence and movement investigations: comprehensive inspections for cracking or other signs of structural movement.
  • Internal alterations and wall removals: safely re configuring your property’s layout.
  • New build designs: full structural design services for new residential properties.

Whether you’re planning a major renovation or a minor alteration, our team is committed to providing the highest quality of service. We deliver practical, effective solutions that meet all regulatory standards. Let us help you build with confidence.

Our Services

Loft Conversions & Extensions: Transforming an unused attic or adding a new extension can dramatically increase the value and livability of your home. We specialise in designing the structural framework for everything from simple rooflight conversions to complex dormer and mansard conversions, as well as single- and double-storey extensions.

Subsidence Investigations: Cracks in walls or uneven floors can be worrying signs. Our experts conduct thorough subsidence and movement investigations to diagnose the cause and recommend the most effective and least invasive remedial actions.

Basements & Internal Alterations: Creating a new basement requires careful planning and expert engineering to manage excavation, waterproofing, and structural integrity. Similarly, removing internal walls to create open-plan living spaces requires precise calculations to ensure the remaining structure is properly supported. We handle it all, providing the necessary drawings and calculations for building control approval.

New Build Design: We offer comprehensive structural design for new residential properties, working alongside your architect to create a safe, stable, and efficient structure from the ground up.

Whether your project is in its infancy or you need expert advice on an ongoing build, we are ready to assist. Contact us today to discuss your requirements and discover how our expertise can bring your project to life.

Why choose us?

Our team of highly qualified consulting engineers have a deep understanding of London’s unique architectural landscape and for more than three decades, we have successfully navigated the complexities of engineering projects in the capital and its home counties. We understand the specific challenges posed by different soil types, existing building structures, and stringent local authority regulations. This extensive, on-the-ground experience allows us to foresee potential issues and develop robust, efficient solutions before they become problems.

We pride ourselves on our client-focused approach. We believe that effective communication is the cornerstone of any successful project. From our first consultation, we listen carefully to your goals and vision. We work collaboratively with architects, contractors, and most importantly, with you. Our proposals are clear, our timelines are realistic, and we are always available to answer your questions and provide support throughout the entire process. You won’t find a one-size-fits-all solution here; every project receives a bespoke engineering design tailored to its specific needs and budget.

Our reputation is built on reliability and professionalism. We understand that undertaking a building project can be a significant investment, both financially and emotionally. That’s why we are dedicated to delivering our services on time and to the highest professional standards. All of our designs and calculations are fully compliant with the latest UK building regulations, giving you peace of mind that your project is not only structurally sound but also legally compliant. This meticulous attention to detail is what sets us apart and ensures a smooth journey from concept to completion.

Structural Engineering Across London

When planning a complex basement, rear extension, or booking a structural inspection, local knowledge matters. London’s diverse housing stock and varying soil conditions require an engineering team that understands the specific structural demands and planning requirements of your local area.

As an established and experienced consultancy, Martin Structural Engineers provides comprehensive structural engineering services all over London and the surrounding areas. We regularly partner with homeowners, architects, and developers to safely deliver projects across the following London Boroughs:

Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Camden, Croydon, Ealing, Enfield, Greenwich, Hackney, Hammersmith and Fulham, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Kensington and Chelsea, Kingston upon Thames, Lambeth, Lewisham, Merton, Newham, Redbridge, Richmond upon Thames, Southwark, Sutton, Tower Hamlets, Waltham Forrest, Wandsworth, and Westminster.