Structural engineers in the UK

Structural engineers for beam and steel design, openings, underpinning, loft floors and building regulations calculations.

822 listings across 32 areas.

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How to choose a structural engineer

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 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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