Case Study: Spareleaze Hill IG10
Project Overview
- Property Location: Spareleaze Hill, Loughton IG10.
- Building Description: Two-storey, five-bedroom detached residential property situated on a steeply sloping site close to Loughton Brook.
Background & Scope
The project was initiated to evaluate and maximize the potential for additional floor area at the rear of the property. Collaborating closely with the architect and the client, the engineering team set out to develop robust structural proposals that could replace an earlier single-storey scheme and significantly enhance the usable living accommodation.
Findings & Site Constraints
The site presented notable engineering and planning challenges due to its sloping topography and proximity to Loughton Brook. Traditional extension methods were heavily constrained by local planning height limits and the complex soil mechanics of the slope, requiring a specialized approach to foundation design and structural load transfer.
Engineering Solution & Implementation
To overcome these hurdles, PSL Engineers devised an innovative structural strategy centered around the following key elements:
- Steel Frame Extension: Development of a robust two-storey steel frame structure designed to provide maximum internal space and structural integrity.
- Piled Foundations: Installation of specialized piled foundations to ensure long-term stability, counter the risks associated with the sloping riverside terrain, and mitigate ground movement risks from nearby poplar trees.
- Slender Floor and Roof Zones: Integration of minimized construction depths for floors and roofs to keep the overall height profile strictly within local planning constraints.
- Ground Level Alterations and Underpinning: Lowering the rear ground floor level and incorporating underpinning set back directly into the slope, successfully facilitating the addition of a second storey without breaching height restrictions.