About LENIO Group
Reliable, cost-effective structural design and structural survey services for residential, commercial and renovation projects across the United Kingdom.
Who We Are
LENIO Group is a UK-based structural engineering consultancy specialising in reliable, cost-effective structural design and structural survey services for residential, commercial and renovation projects. We have built a strong reputation for delivering high-quality engineering solutions that comply fully with UK Building Regulations and industry standards, supporting clients throughout the United Kingdom from our base in Croydon.
We provide expert structural design, structural calculations and engineering support, helping clients move confidently from concept to construction. Our focus is on practical, safe and buildable designs that reduce risk, control cost and ensure long-term performance. From initial assessments through to final calculations and documentation, we support projects at every stage of their lifecycle.
Our team of qualified structural engineers and technical specialists brings expertise across residential housing, commercial developments, extensions, loft conversions, structural alterations, steel structures and reinforced concrete design. We work closely with homeowners, architects, contractors and property developers to deliver clear, precise and buildable engineering tailored to each project.
Explore our structural design services and structural survey services, or view our recent projects.
Professional Memberships
We are proud members of leading professional bodies in the industry, reflecting our commitment to quality, ethics and engineering excellence. These include the Institution of Civil Engineers (ICE) and the Chartered Association of Building Engineers (CABE), whose standards underpin the way we work and the advice we provide.
Our Core Values
Our work is guided by a clear set of values. We put our clients first, delivering practical, cost-effective and compliant structural solutions tailored to their needs. We pursue technical excellence through continuous improvement and modern engineering standards, and we take full ownership of every project to ensure accuracy and reliable delivery from concept to completion.
Quality and integrity underpin everything we do. We maintain strict design checks and engineering standards to ensure safe, durable and fully compliant structures, and we act with honesty and transparency, building trust through clear communication and professional advice. We are also committed to sustainability, promoting efficient design practices that reduce material waste and support long-term environmental performance.
Our Quality Assurance Approach
Quality assurance is built into every project. Our structural drawings progress through a clear sequence of design and verification stages, from the initial site visit and project briefing to preliminary (P0) and detailed (D0) design, and finally to drawings issued as Good for Construction (GFC). Each stage is carefully reviewed before the next begins.
To maintain consistently high standards, each project is handled by a dedicated team with defined responsibilities, including a technician, an engineer, a checker, an independent reviewer and an approver. This multi-level review means every drawing is independently checked for accuracy and compliance before it is issued, reducing errors and supporting safer, more reliable construction.
Structural Engineering in Action
A glimpse of the residential and commercial projects our structural engineers support across the UK.
Frequently Asked Questions
Yes. Our team is made up of qualified structural engineers and technical specialists with experience across residential and commercial projects. We are members of the Institution of Civil Engineers (ICE) and the Chartered Association of Building Engineers (CABE). This professional membership reflects our commitment to recognised engineering standards and ethical practice, so you can be confident your project is in capable hands.
We are based at 5a-7a St James's Road, Croydon, CR0 2SB. From here we provide structural design and structural survey services to clients across London, the South East and the wider United Kingdom. Wherever your project is located, we aim to deliver the same clear communication and high standard of engineering advice.
We work on a wide range of residential and commercial projects, including house extensions, loft conversions, internal alterations, new builds, steel structures and reinforced concrete design. We also carry out structural surveys and inspections for property owners and buyers. Whether your project is large or small, our engineers provide practical, compliant and buildable solutions tailored to your requirements.
Work With a Qualified Structural Engineering Team
Tell us about your project and get clear, practical engineering advice with a free, no-obligation quote.