Structural engineering services
Your Partner in Structural Engineering Services
Calcs-Online engineers the structure of house renovations and new homes across the UK, working remotely from the drawings and photographs you send. You see the price first, then pick the day the calculations arrive.
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Services
Our core services
Choose the work you are planning. Each page explains what the calculations cover and what the engineer needs from you.
Also: garage conversions, garage door conversions and solar panels.
Why the structure is worked out first
Structural calculations show building control that every beam, wall and foundation the work relies on can carry its load. Leave them late, or get them wrong, and a job can stall on site, fail an inspection or need work taken out and done again.
What they give you
- Safety: every load-bearing part is sized for the weight it will carry.
- Compliance: the calculations are what building control asks to see before it signs the work off.
- Cost control: steel and timber sized to the job, not guessed large to be safe.
- Certainty: everyone involved in the project works from the same numbers.
What each service covers
Wall knock-throughs
Taking out a wall to open up a room means the load it carried has to go somewhere else.
- Load-bearing checks: which walls carry load, and how much.
- Beam design: the steel that replaces the wall, with its bearings.
- Building control: calculations set out the way the inspector expects to read them.
Bi-fold and sliding door openings
A wide opening in a rear wall needs a beam or lintel stiff enough that the doors keep running.
- Beam and lintel design for the opening.
- Load paths: how the weight above reaches the ground either side.
- Deflection: checked so the beam does not sag over the doors.
Loft conversions
A loft room adds weight the existing ceiling joists were never meant to carry.
- New floor: joists and steels for the new room.
- Roof changes: dormers, roof windows and any purlins or struts taken out.
- Load paths: how the new loads reach the walls below.
Extensions
Single and two-storey extensions, designed to join the house you already have.
- Foundations: pad and strip footings are included; where the ground calls for piles or a raft, we price that design on its own.
- Openings: the steel where the extension opens into the house.
- Roofs and floors: joists, rafters and any roof lantern.
New builds
A new home needs its whole structure engineered, from the ground up.
- Foundations for the ground you are building on.
- Frame: masonry, steel, timber or a mix.
- Stability: wind and other sideways loads.
RSJ steel beams
Where one beam is all the job needs, the calculations can cover just that.
- Beam size and grade.
- Bearings and padstones at each end.
- Deflection within the limits building regulations set.
Get a Quote That Ticks All The Boxes
- Want an engineer to look first? Get in touch.
- Money back if our calculations aren’t approved
- The delivery date is yours to pick, and each date shows its price
- Overseen by an IStructE member
- A clear price, and a date you choose
Questions
Frequently Asked Questions
What are structural calculations and do I need them?
They are an engineer’s proof that the parts holding your home up (walls, beams, joists, roof and foundations) can carry the loads your project puts on them. If the work changes any of those, building control will almost always ask to see them.
When will I get my structural calculations?
On the day you pick. Your price comes with a calendar of delivery dates, each showing what it costs, and you choose the one that suits the project.
Do you need to visit my home for structural calculations?
No. Calcs-Online is remote only: the engineer works from your drawings, photographs and measurements and does not come to the property.
What do I need to do to get structural calculations?
Send the architectural drawings if you have them. For simpler jobs, such as a single beam, clear photographs, a sketch and a few measurements are often enough. The engineer works from what you send, so the more complete it is, the fewer questions come back.
More answers on the structural calculation FAQs page.