Beechmont, Beaconsfield

• Location: Beaconsfield, Buckinghamshire 
• Architect: DP Architects 
• Developer/Contractor: EAB Homes 
• Property: Private home 
• Project type: Basement extension for swimming pool and wine cellar 
• Our role: structural engineering 

Overview 

Our team was engaged to provide structural engineering expertise for a high-spec basement extension in Beaconsfield, Buckinghamshire.  

The project involved a ground floor extension with a basement designed to house a luxurious swimming pool and a bespoke wine cellar. Given the complexity of the extension, our focus was ensuring structural integrity of two crucial parts of the home. 

Construction methodology and execution  

• The basement was designed to extend approximately 3.4m below ground level which required a carefully planned underpinning strategy to the existing rear elevation. This was carried out using a ‘hit-and-miss sequence’ where the foundations are excavated in bays. This allowed for extension to the current depth of foundations while strengthening them simultaneously and avoiding slippage and movement. 
• We provided a construction methodology to ensure temporary works were detailed well enough to enable the construction of the permanent works. A sacrificial trench was incorporated to act as a thrust block for the newly constructed underpins as well as an indicative propping arrangement to support temporary works, ensuring seamless integration with the permanent structure. 
• The superstructure was constructed using a simple traditional build approach with engineered joists and a large bi-fold door system, seamlessly opening onto the garden space. 

Outcomes 

The project was successfully delivered, providing the client with a beautifully integrated basement extension featuring a swimming pool and wine cellar, all structurally sound and built to last. 

Darren Ball, Founder of dbstructural said: “Our involvement in this project led to continued collaboration with the same client and developer. We have since provided structural engineering services for a commercial premises on Beaconsfield High Street demonstrating our commitment to building strong professional relationships and delivering exceptional results.” 

Why this project stands out 

• Complex underpinning expertly designed and executed 
• Innovative temporary works solutions ensuring safety and efficiency 
• Repeat business with trusted industry partners 
• Seamless integration of basement and superstructure 

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