27 Buckland Crescent — Basement Retrofit and Extension
Renovation, energy retrofit, and extension of an existing family home at 27-29 Buckland Crescent, with a basement retrofit, rear extension, new green roof, and structural coordination with the engineer.
- Location
- Belsize Park, London
- Scope
- Basement and rear extension, flat 27/29 refurbishment
- Structure
- Underpinning, steel frame, geotechnical coordination
- Stage
- Technical design and construction
Project
Renovation, energy retrofit, and extension of an existing family home at 27-29 Buckland Crescent, Belsize Park, London NW3 5DJ. The scope covers a rear extension and full refurbishment of flat 27, a new green roof, and a balcony for the neighbour, along with renovation to flat 29.
Basement and structure
The basement works involve removal of the existing slab and excavation of soil, but not below foundation levels, followed by a new reinforced slab with high-performance thermal insulation and a waterproofing membrane. The back wall is underpinned over its entire length to connect with the new basement extension.
The lower basement FFL sits approximately 0.220 m below the current basement FFL and extends approximately 5.0 m into the garden. The rear basement wall is opened by 6.9 m and supported by a steel structure designed by the structural engineer. Geotechnical engineers designed the basement and underpinning to secure the four-storey building.
Role
Technical design and coordination with the structural engineer, including the basement and underpinning works, rear extension, and structural interfaces.