How to Choose a Structural Engineer: Simple Guide for UK Homeowners
Choosing the right structural engineer makes a big difference to the safety, cost and speed of your project. Whether you're removing a wall, adding a loft conversion or building an extension, you need clear calculations and drawings that your builder and Building Control can trust. This guide explains what to look for and how to avoid the common mistakes homeowners make.
Why Choosing the Right Structural Engineer Matters
A good structural engineer keeps your home safe. They design the beams, supports and foundations that make the structure strong. If the design is poor, you risk:
- Delays
- Extra costs
- Building Control rejection
- Sagging floors or cracks
Choosing well means a smooth build and clear paperwork.
What a Good Structural Engineer Actually Does
Designs steel beams for wall removals
They check if the wall is load bearing and size the RSJ. See our guide on RSJ design.
Checks loft conversions and roof loads
They design the ridge beam, floor joists and supports for a safe loft. For more details, check our loft conversion structural help page.
Designs home extensions
They check the new walls, beams, openings and foundations.
Provides drawings and calculations
These are needed by your builder and Building Control.
Qualifications to Look For
Chartered status (CEng)
This is the highest level of professional recognition.
Incorporated status (IEng)
Shows solid engineering experience.
Degree + experience
Many excellent engineers are degree-qualified with strong domestic experience.
Insurance
Professional Indemnity insurance is essential.
Experience That Really Matters
Look for an engineer who works on:
- Wall removals
- Loft conversions
- Extensions
- RSJ design
- Structural inspections
Domestic experience is far more important than fancy commercial projects.
Questions to Ask Before Hiring
What is included in the fee?
You want calculations and drawings, not just a beam size.
How long will it take?
Most jobs should be done in 24–48 hours.
Do you need a site visit?
Often photos are enough.
How many similar jobs have you done?
Domestic work matters.
Warning Signs to Avoid
- Very low prices
- No drawings
- Slow replies
- No insurance
- No clear scope
- Vague answers
These usually lead to delays and extra costs later.
How Much a Good Structural Engineer Costs
Typical fees:
- Wall removal: £250–£450
- Loft conversion: £450–£900
- Extension: £500–£1,200
- Crack inspection: £200–£300
For a detailed breakdown, see our guide on the cost of a structural engineer.
Why cheap quotes fail
They often skip drawings or miss key checks.
How the Process Works
- You send photos and a floor plan
- Engineer checks loads
- Beam or supports are designed
- Drawings and calcs issued
- Builder installs
- Building Control signs off
FAQs
Do I need a local structural engineer?
Not always. Clear photos are usually enough.
Can I hire online?
Yes, many engineers provide fast online services.
Do I need multiple quotes?
Only if quality seems unclear.
Is a site visit required?
Not for most domestic jobs.
Conclusion
Choosing the right structural engineer helps your project run smoothly and safely. With the right checks, clear drawings and fast turnaround, you’ll avoid delays and keep Building Control happy. For official regulations, you can always check the Planning Portal – Building Regulations.
If you need clear, fast and accurate structural calculations, contact SECalcs and we’ll take care of everything.
Get Started with SECalcs
Ready to move forward? Get a fast, accurate quote for your structural calculations today.