Type: Basement expansion and floor lowering within an existing residential property
Services: Structural Design and Consultancy
London
30 sqm
2025 - present
2025
MMHM Structures Ltd was appointed as the Structural Engineer for the expansion and lowering of an existing residential basement at Borneo Street, London. The brief focused on increasing headroom and creating a dry, high-quality space that integrates with the existing structure while maintaining the stability of adjoining properties and party walls.
Our scope included the design of the reinforced-concrete structure, underpinning sequence, and coordination with the specialist waterproofing designer to deliver a safe, practical, and durable solution.
The permanent works were formed in reinforced concrete, delivered through a sequenced underpinning process to safely deepen and extend the existing basement.
Key structural features include:
MMHM Structures’ design philosophy combined precision, buildability, and cost efficiency. Early collaboration with the project team allowed the development of clear, practical sequencing and detailing that met both engineering and construction objectives. The resulting solution provided durability, safety, and performance suited to London’s challenging ground conditions.
If you have a project that needs Structural Engineering support, then get in touch with us.
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