Extension (Totteridge, North London)
The structural calculations behind this project, prepared by our engineers for building control.
Project Overview
Location
Totteridge, North London
Project Type
Extension
Structural Services
Detailed Calculations
Compliance
Building Regulations
Single Storey Extension – Totteridge, North London
This Totteridge home has been transformed with a single-storey extension, creating a modern, open-plan living space designed for functionality and seamless indoor-outdoor flow. The project involved removing the majority of internal walls, requiring expert structural design solutions to ensure the property remained stable and secure.
To support this major structural modification, PorthouseDean provided expert structural calculations, designing a steel goalpost frame to maintain lateral stability against wind loads while allowing for unobstructed, spacious interiors.
Maximising Space & Stability with Smart Structural Design
This project included:
✅ A rear single-storey extension – Expanding the kitchen and living area for a more modern layout
✅ A steel goalpost frame – Providing essential stability after internal wall removal
✅ Large bi-fold doors & glazing – Flooding the space with natural light and enhancing garden access
✅ Structural reinforcements – Ensuring compliance with Building Control for a safe and durable build
What we did
Our contributions included:
✔ Structural calculations for the single-storey extension – Ensuring compliance and stability
✔ Steel goalpost frame design – Supporting lateral stability after wall removals
✔ Load-bearing wall assessments – Ensuring a safe and structurally sound open-plan layout
✔ Foundation analysis – Reinforcing stability for the extended footprint
With expert structural engineering, this Totteridge home now benefits from a bright, modern, and highly functional living space, 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 Totteridge, Barnet, and North 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.