Structural engineers in Cardiff
18 practices covering Cardiff. Listings are business information researched by Renovome; contact details and matching happen inside Workspace.
Appointing a structural engineer in Cardiff
Cardiff engineers design steels for rear openings and extensions, loft floors in bay-fronted terraces, and reports on movement and damp-related damage. Welsh building regulations apply, so use an engineer who works to them regularly.
Property you'll be working with in Cardiff
Victorian bay-fronted terraces with shallow foundations and rear lanes, alongside interwar and post-war semis with conventional cavity construction.
Planning in Cardiff
Calculations are submitted with a Welsh building regulations application. Party wall procedure applies in Wales as in England, so terrace work usually needs notices as well as drawings.
What structural engineers charge in Cardiff
£700 to £2,100 for a typical extension or loft in 2026, £450 to £850 for single-beam calculations, and £550 to £1,200 for a structural report.
Indicative 2026 ranges and local context, not quotations or planning advice. Last reviewed: September 2026.
A••••• P••••••••
Structural engineering practice providing structural design, calculations, surveys and related advice for residential and other building projects.
A•••••• D••••
Structural engineering practice serving Cardiff and South Wales.
B••• C••••••••
Structural engineering practice providing structural design, calculations, surveys and related advice for residential and other building projects.
B•••••• A•••••••• L••
Structural engineering practice providing structural design, calculations, surveys and related advice for residential and other building projects.
C•• E•••••••• D••••• L••
UK structural engineering practice providing structural design, calculations, surveys or related engineering services for building projects.
C••••• M••••••• L••
UK structural engineering consultancy providing structural design, calculations, surveys or related engineering services.
H•• E•••••••• L••
UK structural engineering consultancy providing structural design, calculations, surveys or related engineering services.
L•••••••• C•••••••• E•••••••• L••
Structural engineering practice providing structural design, calculations, surveys and related advice for residential and other building projects.
M•••• R•
UK structural engineering consultancy providing structural design, calculations, surveys or related engineering services.
M••••• C•••• a•• S••••••••
Structural engineering practice serving Cardiff and South Wales.
N• J• P• C••••••••
Structural engineering practice providing structural design, calculations, surveys and related advice for residential and other building projects.
Q••••••••
UK structural engineering practice providing structural design, calculations, surveys or related engineering services for building projects.
S•••• D••••• L••
Structural engineering practice serving Cardiff, Wales.
S•••••••• B•••••••• &• P•••••••
UK structural engineering consultancy providing structural design, calculations, surveys or related engineering services.
S•••••••• S•••••• U•
Structural engineering practice serving Cardiff, Swansea and Carmarthen, Wales.
T•••• D••••• L••••••
Structural engineering practice serving Pontypridd, Cardiff and Pembrokeshire.
V•••• C•••••••• L••
UK structural engineering consultancy providing structural design, calculations, surveys or related engineering services.
W•••••••• L••
Structural engineering practice providing structural design, calculations, surveys and related advice for residential and other building projects.
How to choose a structural engineer in Cardiff
You need a structural engineer whenever load paths change: removing a wall, forming an opening, adding a loft floor, or building foundations near a neighbour. Building control will ask for their calculations.
- Check for chartered status with the IStructE or ICE.
- Ask whether site inspections and building control queries are included.
- Send the architect's drawings with your enquiry so the quote is for the real job.
- Ask how quickly calculations can be issued, as this often sets the start date.
- Confirm professional indemnity insurance cover.
What structural engineers in Cardiff typically work on
- Beam and steel design for openings
- Loft floor and dormer structure
- Foundation and underpinning design
- Chimney breast removal
- Structural inspections and reports
Typical 2026 fees for structural engineers
| Item | Typical 2026 cost |
|---|---|
| Single beam calculation | £450 - £850 |
| Extension structural package | £750 - £1,800 |
| Loft conversion calculations | £750 - £1,600 |
| Site inspection and letter | £300 - £600 |
| Structural survey report | £600 - £1,400 |
Indicative 2026 UK ranges, not quotations. London and the South East usually sit at the top of each range. Last reviewed: September 2026.
Common questions
- Do I need a structural engineer as well as an architect?
- Usually yes. The architect designs the space; the engineer proves the structure stands up and issues the calculations building control requires.
- What does a structural engineer cost in 2026?
- From about £450 for a single beam calculation to £1,800 for a full extension package.
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