Extension (Whetstone, North London)
The structural calculations behind this project, prepared by our engineers for building control.
Project Overview
Location
Whetstone, North London
Project Type
Extension
Structural Services
Detailed Calculations
Compliance
Building Regulations
Extension – Whetstone, North London
This Whetstone home has been transformed with a modern, light-filled extension, designed to create a spacious, open-plan living environment. The homeowners wanted to extend their ground floor, improving flow, functionality, and natural light with the generous use of glazing to seamlessly connect the interior with the garden.
To ensure structural integrity, stability, and full compliance with Building Control, PorthouseDean provided expert structural calculations, supporting the steel beam reinforcements, load-bearing wall modifications, and foundation strengthening to guarantee a safe and efficient build.
Maximising Light & Space with Smart Structural Design
This project included:
✅ A rear extension – Expanding the kitchen and living area for modern family living
✅ Floor-to-ceiling glazing & bi-fold doors – Enhancing natural light and outdoor views
✅ Structural steelwork & RSJs – Supporting wide openings for an open-plan feel
✅ Seamless integration with the existing structure – Ensuring durability and compliance
What we did
Our contributions included:
✔ Structural calculations for the extension – Ensuring safety and stability
✔ RSJ beam & steel design – Supporting large-span openings for a seamless layout
✔ Load-bearing wall assessments – Ensuring a stable structure after modifications
✔ Foundation analysis – Providing long-term stability for the extension
With expert structural engineering, this Whetstone home now benefits from a modern, light-filled, and highly functional extension, perfectly suited for entertaining and everyday living.
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 Whetstone, 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.