Extension & loft conversion (Dulwich, London)
The structural calculations behind this project, prepared by our engineers for building control.
Project Overview
Location
Dulwich, London
Project Type
Extension & loft conversion
Structural Services
Detailed Calculations
Compliance
Building Regulations
Rear Extension & Loft Conversion – Dulwich, London
This Dulwich home has been transformed with a rear extension and loft conversion, creating a spacious, modern, and highly functional living space. The homeowners wanted to extend their ground floor for a larger kitchen-diner while also converting their loft to add extra bedrooms and living space.
To ensure the structural integrity, stability, and compliance with Building Control, PorthouseDean provided expert structural calculations, supporting the new extensions, steel beam reinforcements, and load-bearing wall modifications to ensure a safe and efficient build.
Maximising Space with Smart Structural Design
This project included:
✅ A large rear extension – Expanding the ground floor with an open-plan layout
✅ A full loft conversion – Adding valuable additional living space
✅ Structural steelwork & RSJs – Supporting wide openings for a seamless design
✅ Maximised natural light – Bi-fold doors, skylights, and dormer windows for a bright, airy space
What we did
Our contributions included:
✔ Structural calculations for the rear extension & loft conversion – Ensuring safety and compliance
✔ RSJ beam & steel design – Supporting large-span openings and new loft structure
✔ Load-bearing wall assessments – Ensuring safe structural modifications
✔ Foundation analysis – Providing stability for both the rear extension and loft conversion
With expert structural engineering in place, this Dulwich home now benefits from a modern, light-filled, and highly practical living space, perfect for growing families and contemporary living.
Thinking About a Home Extension or Loft Conversion? Let’s Make It Happen!
At PorthouseDean, we provide expert structural calculations for home extensions, loft conversions, RSJs, and open-plan renovations.
📍 Providing structural engineering across Dulwich, Clapham, and South 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.