Specialist Steel Contractor
The UK’s Steel Specialist for Self-Storage & Warehouse Conversions
We design, supply, install, and project-manage structural steel packages, mezzanine floors, and stair cores for commercial developments across London and the South East.
Agile Delivery. Specialist Expertise.
STONNA Steel Structures operates as a high-value specialist contractor. By partnering with leading UK fabricators and focusing entirely on design coordination, site management, and installation, we offer unmatched agility. We don’t just supply steel; we provide pre-tender buildability advice, value engineering, and seamless project delivery for operators, main contractors, and architects.
Our Specialist Steel Services
From self-storage to warehouse conversions, we deliver every aspect of your structural steel package.
Self-Storage Steel Packages
End-to-end structural steel solutions tailored for the rapidly expanding self-storage sector. From initial budget advice to final handover, we ensure standardized quality and rapid deployment.
Mezzanine Floors
High-capacity steel mezzanine structures designed to maximize space in industrial units, storage facilities, and logistics warehouses.
Structural Alterations
Complex structural steel packages for warehouse conversions, including strengthening existing frames and integrating new structural elements.
Structural Design & Coordination
Working closely with architects and engineers early in the process. We provide value engineering, technical detailing, and buildability input before the tender stage.
Project Management & Installation
Complete site control. Our experienced teams manage crane operations, steel erection, subcontractor coordination, and strict health & safety compliance.
Why Partner with STONNA?
We understand the specific demands of self-storage and commercial developments. Our unique operational model—focusing on management and installation while utilizing a vetted network of specialist fabricators—means we offer flexible capacity, lower risk, and faster delivery times.