LSY has delivered sustainable, innovative engineering solutions on time and within budget since 2016. We are a London-based civil and structural engineering practice servicing the UK and beyond. We fuse passion and expertise to design and deliver both permanent and temporary works across every sector, specialising in high-value structures.


We’re a dynamic team of specialists with more than seven decades’ collective experience. As natural problem solvers, we engineer solutions that are tailored to our clients’ aspirations, managing every stage of a project from concept to detailed design and construction management.


We’ve built a leading reputation through our client-focused, hands-on approach and are proud that the majority of our workload comes from repeat customers. Unwavering dedication to delivering solutions that best serve our clients is the cornerstone of our business model.


Our diverse portfolio showcases our commitment to finding the right solution for even the most challenging of jobs. We undertake a variety of job types including: civil, commercial, hotels, leisure, listed, mixed use, refurbishment, residential, retail and temporary works.


Through relentless attention to detail, genuine care for our clients and industry experience built over decades, we consistently deliver a high quality service that ensures all projects are delivered on time and within budget to each client’s complete satisfaction.

When you work with LSY, you’re choosing a business committed to:

  • Client satisfaction
  • Transparency and honesty
  • Attention to detail
  • Professionalism
  • Delivering value

Take a look at how our past projects aligned with these values

What do our clients have to say?


LSY are one of our partnering structural engineering firms and over a period of time have built a great relationship with them. They have always supported us and our clients to a very high standard and deliver on sometimes very tight timescales. We look forward to continuing to work with them for many years to come.

Patrick Murphy​
CS2 Chartered Surveyors


Shape London Architects work with Seán and the team at LSY on a number of our residential projects of various sizes and complexity. We find LSY responsive and agile to design needs with clear messaging throughout their reporting and engineering solutions. We look forward to completing our current projects and future work with LSY.

Neil Lynch
Shape London


We have worked with LSY on a number of projects and we can’t speak more highly of their services. They are always a pleasure to collaborate with and are are always on hand to answer any queries throughout the design and construction process.

Thomas A. Davies
Managing Director
Thomas Alexander


I have used the professional services of LSY Engineering Consultants Limited (LSY) on multiple of occasions and I have always found your services to be extremely professional, informed and presented with an exceptional attention to detail. In particular you combine your technical and practical experience of a Chartered Structural Engineer with a common sense approach with which in my experience has always resulted in the most appropriate solution for the challenge in question.

Grahame Dean
Loss Assessor (South West Thames)
Aspray Ltd


LSY has proactively supported our projects for several months now and has provided a top quality service. LSY have provided a very attentive service and undertaken all works quickly and at reasonable costs. We will continue to develop and grow our relationship well into the future.

Jacob Kilroy
Contracts Director
WorkFlow Services Ltd


LSY Engineering Consultants Ltd. has been involved primarily in providing a wide variety of structural engineering services on various high-end residential projects within our project portfolio on projects in London. They have always supported us to a high standard and delivered on within our project program requirements. We look forward to working with LSY Engineering Consultants Ltd. in the future and would have no hesitation in recommending the company in providing structural engineering services.

Conor O’ Sullivan
Portfolio Manager (Residential)
Audley Property


As architects, we have worked alongside LSY Engineering Consultants Ltd. on three projects. All three were varied, and the scopes very different. We have found the company approached each with nuance and care, providing timely, informed, instructive and imaginative work highly tailored to the brief. We have introduced them to clients in the past and will continue to do so, and we look forward to many years of continued professional involvement with LSY Engineering Consultants Ltd.

Oliver D Grimshaw
OG Architecture


Forward Contracting has worked with LSY Engineering Consultants Ltd for a number of years on multiple projects of varying scope. The team has never let us down. They are the most responsive, contactable, diligent structural engineers we have ever worked with. Everyone here at Forward Contracting, and I personally, could not recommend LSY Engineering Consultants Ltd enough. We have worked together on various commercial project throughout the UK and will continue to do so for a very long time.

Matthew Ward
Forward Contracting Uk Ltd


LSY are our go to structural engineering firm and have assisted Origin Housing on numerous projects including structural design and structural surveys throughout London. Sean and his team are competent, thorough and have always been on hand for advice when required.

Simon Jones
Building Surveyor
Origin Housing