Structural engineering services for home extensions, lofts and wall removals

Home extension structural design

• Full structural calculations and drawings for rear, side and wrap around extensions.
• Footings, slabs, steel beams and lintels sized so your builder knows exactly what to build.
• Read more on our home extension structural engineer page.
• See our guide to footings for extension and new build structural engineer services.

Load bearing wall removal and RSJ design

• RSJ design for open plan kitchens, chimney breast removals and room knock throughs.
• We design the steel beam, padstones and any posts needed, ready for Building Control.
• Start with our load bearing wall removal and steel beam calculation pages.
• For RSJ work in your area see RSJ design services and our city pages for Manchester, London, Birmingham, Bristol, Leeds, Liverpool, Nottingham and Sheffield.

Loft conversion structural engineer

• Steel ridge beams, floor joists, dormer walls and openings designed for new loft rooms.
• We check deflection, vibration and roof stability so the loft feels solid and safe.
• Read more on our loft conversion structural engineer page.
• Where needed we also design timber floors and beams and coordinate with extension steelwork.

Basements, retaining walls and ground engineering

• Basement boxes, retaining walls and underpinning designed for ground and water pressure.
• We look after slabs, industrial floors and in situ concrete where loads are higher.
• See our pages for basement structural design, retaining walls and industrial ground floors.
• We also design in situ concrete slabs and foundations for small commercial units.

Portal frames and steel structures

• Design of portal frames for small warehouses, farm buildings and workshops.
• Steel columns, rafters, eaves ties and bracing sized for wind, snow and crane loads.
• Mezzanine platforms designed for storage and offices on our mezzanine floor page.
• Column checks and new members detailed on our steel columns page.

Reinforced concrete design

• Reinforced concrete beams and frames designed to Eurocode on our RC beam design page.
• Column sizing, stability and detailing for reinforced concrete columns.
• Slabs and foundations cast on site covered on the in situ slab and foundation pages.

Masonry, timber and connection design

• Masonry wall checks, piers and panels explained on our masonry wall design page.
• Timber floor joists, flitch beams and roof members on the timber design page.
• Steel connection forces and typical details covered on our connections page.

Steel beam calculation and RSJ support

• Single and multi span steel beams designed on the steel beam calculation page.
• Integrated RSJ and column design for open plan layouts via our RSJ design hub.
• Local RSJ services available in London, Manchester, Birmingham, Nottingham, Bristol, Leeds, Liverpool and Sheffield.

1. Send drawings and photos

• You email architect plans, sketches or even measured photos along with the property address.
• We confirm what needs designing and which structural engineering services apply.

2. Fixed fee and programme

• We send a clear fixed fee, typical turnaround and any information we still need.
• Most domestic jobs complete within 24 to 72 hours once we have everything.

3. Calculations and drawings

• We design beams, walls, slabs and foundations, then issue drawings, markups and calculation sheets in PDF.
• You pass these to your builder and Building Control. We respond to reasonable follow up questions as part of the service.

4. Support through to sign off

• If the Building Control officer or warranty provider has queries, we clarify the design and issue revisions where agreed.
• For larger projects we can stay involved as needed, for example when contractor changes affect the structure.

Structural engineer city pages

Major UK cities

Home extension hotspots

Popular extension areas

Each of these pages explains how we support local homeowners with extensions, lofts and wall removals in that area.