Extension (Stockport, Greater Manchester)
The structural calculations behind this project, prepared by our engineers for building control.
Project Overview
Location
Stockport, Greater Manchester
Project Type
Extension
Structural Services
Detailed Calculations
Compliance
Building Regulations
Elevating Space with a First Floor Extension in Stockport, Greater Manchester
With growing family needs and a desire to make better use of their footprint, this homeowner in Stockport wanted to add extra living space without compromising the ground floor layout. Their solution? A smart, floating first-floor extension above an existing single-storey structure.
Unlocking New Space Without Expanding the Footprint
The extension created a generous new bedroom and bathroom, while maintaining full access and light flow to the garden below. The design focused on:
✅ Minimal impact on the ground floor — no internal reconfiguration needed
✅ Careful support detailing to accommodate the ‘floating’ effect
✅ Sympathetic design to tie into the original building aesthetics
✅ Improved thermal performance and future-proofed use of space
Structural Engineering Behind the Build
To make the floating structure work safely and efficiently, PorthouseDean provided:
✔ Steel frame design and connection detailing — to carry loads over the open ground floor below
✔ Foundation checks and bearing wall assessments — to verify capacity for the additional storey
✔ Roof tie-ins and wind load analysis — to ensure long-term stability in exposed locations
✔ Clear documentation for Building Control approval — smooth and stress-free compliance
Designed for Flexible Modern Living
This thoughtful extension now provides:
🏡 Additional living space without sacrificing garden or ground floor rooms
☀️ Large windows and elevated views across the surrounding area
📐 A future-proofed layout that can serve as a bedroom, home office, or guest suite
Building Something Similar? Let’s Talk.
At PorthouseDean, we specialise in structural calculations for first-floor extensions, steel design, and modern home upgrades.
📍 Serving Stockport, Greater Manchester, and across the North West.
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.