The short answer
A structural engineer in the UK typically charges around £70–£150 per hour, with a chartered engineer (IStructE or ICE) usually at the upper end and a graduate or technician engineer lower. Many practices price a day rate instead, commonly £500–£900 per day for site work, or set a minimum call-out of one to two hours. In practice, most domestic jobs — extension calculations, a single beam, a loft design — are quoted as a fixed project fee rather than by the hour, because the scope is predictable. Hourly billing tends to apply to investigations, ongoing inspections and ad-hoc advice where the time needed is uncertain. London and the South East carry a 15–25% premium. The honest figure depends on the engineer's seniority and what the task actually involves.
Hourly rates matter most when the work is open-ended — an inspection, an investigation or advice. For defined design work, a fixed fee is usually cheaper and clearer. The figures below are typical ranges, not quotations.
Typical UK rates
- Hourly rate£70–£150
- Day rate (site work)£500–£900
- Graduate / technicianlower end
- Chartered engineerupper end
- London / South East15–25% premium
When you pay by the hour
Hourly billing is most common where the engineer cannot predict the time in advance. That includes a structural inspection of an existing problem, an investigation into a crack or movement, witnessing foundations or steelwork during a build, and short pieces of advice over the phone or email. For these, an engineer may quote an hourly rate plus travel, or a minimum half-day. By contrast, a defined design package — say the calculations for a loft conversion — is nearly always quoted as a single fixed fee, because the engineer can scope it from the drawings. The practical test is whether the engineer can see the end of the job from the start: if they can, expect a fixed fee; if the work could expand depending on what they find on site, expect an hourly or day rate so neither side is locked into a guess.
| Task | Typical basis | Indicative figure |
|---|---|---|
| Defined calculations | fixed project fee | £400–£1,500 |
| Site inspection / visit | hourly or call-out | £150–£400 |
| Investigation / advice | hourly | £70–£150 / hr |
| Witnessing a build | day rate | £500–£900 / day |
Indicative UK figures for guidance. Sources: Checkatrade structural engineer cost guide; typical 2025/2026 ranges.
What sets the rate
- Seniority: a chartered engineer with IStructE or ICE membership and professional indemnity insurance commands more than a graduate engineer or a technician.
- Complexity: heritage buildings, unusual structures and forensic investigations need more experience and so a higher rate.
- Region: London and the South East sit above the national average; the North and parts of the Midlands tend to be lower.
- Travel and call-out: many engineers add mileage or a minimum charge for short site attendances, so a one-hour job rarely costs only one hour.
Why a fixed fee is often better value
For design work, asking for a fixed fee usually serves you better than an hourly rate. A fixed fee gives you certainty and means the engineer carries the risk if the calculations take longer than expected. Hourly billing only makes sense where neither side can scope the job up front — for instance, you do not yet know whether a crack is cosmetic or structural, so you pay for the engineer's time to find out, then commission any remedial design as a separate fixed piece. If an engineer insists on hourly billing for a clearly defined task, ask why a fixed quote is not possible.
How chartered status affects the figure
The letters after an engineer's name matter to the rate and to acceptance by Building Control, mortgage lenders and insurers. A chartered structural engineer (MIStructE) or chartered civil engineer (MICE) has passed professional review, holds indemnity cover and can sign off work that some lenders and warranty providers will not accept from an unqualified person. You pay more for that assurance, but for anything load-bearing — beams, foundations, removing structure — it is the qualification most likely to be accepted without question. For very simple advice, a less senior engineer at a lower hourly rate may be perfectly adequate.
How regional and seasonal demand moves the rate
Hourly rates are not fixed across the country or across the year. Region is the biggest geographic factor: London and the South East sit well above the national average because office overheads, insurance and salaries are higher, while practices in the North of England, Wales and parts of the Midlands tend to quote lower. Demand matters too — extension and loft activity tends to peak in spring and summer, and a busy local engineer in a popular area may quote a higher rate or a longer lead time simply because work is plentiful. If your job is not urgent, getting quotes outside the peak, or from a slightly wider radius, can bring the rate down. The trade-off is travel: an engineer further away may charge less per hour but add more for the site visit, so compare the total cost of attending, not just the headline rate.
- Region: London and the South East at the top; the North and Wales typically lower.
- Season: spring and summer are busiest for domestic structural work.
- Travel distance: a lower rate far away can be offset by higher call-out and mileage.
- Lead time: flexibility on timing can secure a better rate from a busy practice.
Frequently asked questions
Is it cheaper to pay hourly or a fixed fee?
For defined design work a fixed fee is usually cheaper and removes the risk of overruns. Hourly billing only tends to win where the task is genuinely open-ended, such as an investigation where nobody knows the scope until the engineer has looked.
Do structural engineers charge for travel?
Many do, either as mileage on top of the hourly rate or built into a minimum call-out charge. Ask whether travel is included when you get the quote, especially for a short site visit far from the engineer's office.
What is a typical day rate for a structural engineer?
Around £500–£900 per day is common for site attendance or witnessing work, with chartered engineers and London-based practices at the higher end. A half-day rate is often offered for shorter visits.
Sources & further reading
- Checkatrade — structural engineer cost guide
- ICE — Institution of Civil Engineers
- IStructE — find a chartered structural engineer
Figures on this page are typical UK ranges drawn from published sources and depend on your specific project. They are guidance, not a quotation.