Structural Engineering for Single-Storey Extensions
At Vanguard Engineers, planning a single-storey extension means getting the right structural calculations and drawings in place. Our structural engineers work alongside your architect or builder to get your project through building control, from initial design through to completion, across Essex, East London and nationwide.
About This Service
Structural design for your single-storey extension
A single-storey extension needs coordinated design of foundations, walls, beams, and roof — and a clear interface with the existing building. We take architectural drawings and produce the structural calculations, drawings, and specification required for Building Control and construction.
Whether rear, side, or wrap-around, the deliverable is a complete engineer-signed package your builder can follow on site.
What We Provide
Included in this service
- Site visit or remote review of architectural drawings and proposed layout
- Foundation design — strip, trench-fill, or reinforced concrete based on ground conditions
- Design of load-bearing walls, beams, and lintels for the new structure
- Roof structure design including rafters, joists, purlins, and ridge beams
- Structural drawings suitable for Building Control and construction
- Full written specification your builder can follow on site
- Building Control-ready documentation with structural design certificate where required
- Guidance on interfacing the new extension with the existing building
Project Information
When this applies & how we work
Typical situations
- Adding a rear, side, or wrap-around single-storey extension
- Extending your kitchen, living space, or utility area
- Extensions requiring new foundations, walls, and roof structure
- Architects or builders needing engineer-approved structural drawings
- Homeowners wanting the complete structural design handled in one package
Process
- 01ReviewArchitectural drawings, proposed layout, and site conditions assessed
- 02Site visitExisting structure and ground conditions inspected where required
- 03DesignFoundations, walls, beams, lintels, and roof structure designed
- 04DeliveryStructural drawings, specification, and signed package for Building Control
Planning a single-storey extension?
Share your architectural drawings — we’ll confirm scope and deliver a complete Building Control-ready package.
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