Extension (Walton-on-Thames, Surrey)
The structural calculations behind this project, prepared by our engineers for building control.
Project Overview
Location
Walton-on-Thames, Surrey
Project Type
Extension
Structural Services
Detailed Calculations
Compliance
Building Regulations
Single Storey Extension – Walton-on-Thames, Surrey
This Walton-on-Thames home has been beautifully extended with a single-storey rear extension, creating a spacious, light-filled kitchen and dining area. The project included internal kitchen alterations, allowing for a more modern and functional open-plan layout.
To ensure structural stability, compliance with Building Control, and a seamless integration with the existing home, PorthouseDean provided expert structural calculations, supporting steel beam installations, load-bearing wall modifications, and foundation reinforcements.
Enhancing Space & Functionality with Smart Structural Design
This project was designed to:
✅ Expand the kitchen and dining space – Creating an open-plan, modern layout
✅ Introduce large glazing & bi-fold doors – Maximising natural light and garden views
✅ Ensure structural integrity – Using RSJs and steel beams to support wide-span openings
✅ Improve property value – Enhancing functionality and long-term investment appeal
What we did
Our contributions included:
✔ Structural calculations for the single-storey extension – Ensuring compliance and stability
✔ RSJ beam & steel design – Supporting large-span openings for open-plan living
✔ Load-bearing wall assessments – Safely modifying the existing structure
✔ Foundation analysis – Providing strength and stability for the extended footprint
With expert structural engineering in place, this Walton-on-Thames home now benefits from a bright, modern, and highly functional extension, perfect for family life and entertaining.
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 Walton-on-Thames, Weybridge, and Surrey.
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.