Extension (Hammersmith, West London)
The structural calculations behind this project, prepared by our engineers for building control.
Project Overview
Location
Hammersmith, West London
Project Type
Extension
Structural Services
Detailed Calculations
Compliance
Building Regulations
Rear Extension – Hammersmith, West London
This Hammersmith home has been transformed with a modern rear extension, creating a spacious, open-plan living area designed for functionality, natural light, and seamless indoor-outdoor flow. The homeowners wanted to expand their ground floor, improving the kitchen and dining space while ensuring the structure was stable, compliant, and built for long-term durability.
To bring this project to life, PorthouseDean provided expert structural calculations, ensuring the new extension, steel beam reinforcements, and load-bearing wall modifications were engineered for safety, compliance, and efficiency.
Maximising Space & Modern Living with Smart Structural Design
This project included:
✅ A rear extension to expand the living space – Creating a bright and modern open-plan layout
✅ Large bi-fold doors & glazing – Maximising natural light and providing garden access
✅ RSJs & structural steel design – Supporting wide-span openings and load distribution
✅ Seamless integration with the existing structure – Ensuring durability and compliance
What we did
Our contributions included:
✔ Structural calculations for the rear extension – Ensuring safety and compliance
✔ RSJ beam & steel design – Supporting large openings for an open-plan feel
✔ Load-bearing wall assessments – Ensuring a stable structure after modifications
✔ Foundation analysis – Providing stability for the extended footprint
With expert structural engineering in place, this Hammersmith home now benefits from a modern, stylish, and highly functional rear extension, perfect for family life and entertaining.
Thinking About 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 Hammersmith, Fulham, and West 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.
