Extension (Redhill, Surrey)
The structural calculations behind this project, prepared by our engineers for building control.
Project Overview
Location
Redhill, Surrey
Project Type
Extension
Structural Services
Detailed Calculations
Compliance
Building Regulations
Extension – Redhill, Surrey
This detached home in Redhill has been beautifully extended, creating a modern, spacious, and structurally secure living space. The homeowners aimed to open up the rear of the house, maximising natural light, open-plan flow, and long-term structural stability.
To achieve this, PorthouseDean provided expert structural calculations and detailed drawings, ensuring that every element was designed for both strength and aesthetics.
Smart Structural Design for Seamless Integration
This extension was engineered to:
✅ Enhance rear stability – Using stiff goal-post frames for structural reinforcement
✅ Create a sleek, open-plan feel – Concealing steel frames within surrounding walls
✅ Maximise light and space – Large-span openings supported by precision engineering
✅ Ensure smooth interior finishes – Integrating structural elements seamlessly into the design
What we did
Our role included:
✔ Structural calculations for the extension – Ensuring stability and compliance
✔ Goal-post frame design – Providing essential reinforcement for large openings
✔ RSJ & steel beam integration – Supporting wide spans while maintaining aesthetic appeal
✔ Load-bearing wall modifications – Allowing for an open, modern layout
By combining engineering precision with architectural creativity, this home extension offers a structurally sound, visually seamless, and highly functional space.
Planning a Home Extension? Let’s Make It Happen!
At PorthouseDean, we provide expert structural calculations for home extensions, RSJs, open-plan designs, and steel frame integration.
📍 Providing structural engineering across Redhill, Reigate, 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.