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House Extension Structural Engineer — London & Essex
We design side return, rear, and wraparound extensions for homeowners across London and Essex. Our structural engineers provide steel beam design, foundations, and Building Control-ready calculations so builders can proceed confidently.
House Extension Structural Design Services
- Load-bearing wall removals with RSJ design
- Steel frame layouts for open-plan kitchen/dining spaces
- Foundation design for clay, filled ground, and existing drains
- Roof structure design (flat, pitched, rooflights, lanterns)
- Drainage and movement joint considerations for extensions
- Building Control calculation packs and annotated drawings
Why homeowners choose SBS
- Local familiarity with Redbridge and East London housing stock
- 5–7 day turnaround for most residential extensions
- Coordination with architects and builders to avoid site delays
- Clear steel schedules and padstone details for contractors
- Fixed-fee proposals and free initial consultation
Common extension questions
- Do I need a structural engineer for an extension? Yes—calculations for beams, columns, and foundations are required for Building Control.
- Can you help with open-plan layouts? Yes—we design steel frames and connections for large openings and bifold doors.
- Do you visit site? Yes — same-day or next-day site visits in Ilford may be available, subject to availability.
Next steps
Talk to SBS and plan your project
Send through a sketch, plan or photo and we'll come back with a clear written quote — no obligation. Most enquiries are answered the same working day. Phone, WhatsApp and email are in the footer.
Mon to Sat, 8am to 6pm. Most calls answered within 1 hour. Or message us on WhatsApp.
Where we work from
Two offices — Ilford (61 Cranbrook Road, IG1 4PG) and Tilbury (Brunel Close, RM18 8EJ) — covering Ilford, Tilbury, Thurrock, East London and Essex.
