Extension (Wimbledon, Southwest London)
The structural calculations behind this project, prepared by our engineers for building control.
Project Overview
Location
Wimbledon, Southwest London
Project Type
Extension
Structural Services
Detailed Calculations
Compliance
Building Regulations
Single Storey Wrap Around Extension – Southwest London
This Southwest London home has been beautifully transformed with a single-storey wrap-around extension, creating a more open, functional, and light-filled living space. The homeowners wanted to extend both the side and rear of the property, maximising their ground floor layout for a seamless indoor-outdoor feel.
To ensure the structure was safe, durable, and fully compliant with Building Control, PorthouseDean provided expert structural calculations, working closely with Fluent Architectural Design Services to bring this vision to life.
Maximising Space with Smart Structural Design
This project focused on:
✅ A wrap-around extension – Extending both to the rear and the side for maximum space
✅ An open-plan kitchen & living area – Creating a modern, social hub for the home
✅ Large structural openings – Steel beams and RSJs allowing for seamless flow
✅ Plenty of natural light – Large glazing and skylights enhancing brightness
What we did
Our structural input included:
✔ Structural calculations for the wrap-around extension – Ensuring stability across both new sections
✔ Steel beam (RSJ) design – Supporting large-span openings for an open-plan layout
✔ Load-bearing wall assessments – Making sure all structural modifications were safe
✔ Foundation analysis – Ensuring a strong and durable base for the extension
With our precision engineering, this home now enjoys a spacious, modern, and highly functional extension, enhancing both practicality and property value.
Planning a Home Extension? Let’s Make It Happen!
At PorthouseDean, we provide expert structural calculations for home extensions, RSJs, open-plan layouts, and wall removals.
📍 Providing structural engineering across Wandsworth, Wimbledon, and Southwest London.
Why Extend Your Home?
More Space, More Possibilities
Create an open-plan kitchen, a family hub, or a bright entertaining space.
A Date You Can Plan Around
You choose the delivery date, and the price follows the date.
More Natural Light
A wider opening to the garden needs a beam sized for the load above it. The calculations set that size.
Personalised Design
Every house is built differently. The calculations work from your drawings and the structure you already have.
How PorthouseDean Supports Your Project
Every project is different, but the need for precise, reliable structural calculations remains the same. Our engineers work with:
Homeowners
Ensuring designs are safe, cost-effective, and practical.
Architects
Providing calculations that allow for creative yet compliant designs.
Builders
Making sure construction runs smoothly with clear, reliable specifications.
Planning Your Own Project?
More than 9,000 projects since 2012 have run through the same process. You get a fixed price before you commit, and you choose the delivery date.
📩 Get a QuoteStructural Engineering Services We Offer
Structural Calculations for Loft Conversions
Calculations for the floor, beams and roof changes a loft conversion needs.
Structural Calculations for Wall Knock-Throughs
Beam and support calculations for taking out a wall.
Structural Calculations for Extensions & New Builds
Calculations for foundations, walls, beams and roofs on extensions and new builds.
Structural Calculations for Bi-Fold Doors & RSJs
Beam and padstone sizes for wide openings and bi-fold doors.
Structural Drawings & Building Control Calculations
Complete documentation to help you achieve smooth Building Control approvals.
