When Do You Need a Structural Engineer?
Structural engineering professionals get involved in two broad situations: something is moving and you need to know why, or you are changing the building and need to know it will hold.
Something is wrong
Cracks and movement
Diagonal or stair-step cracking, cracks that keep growing, separation at brick veneer.
Floors and ceilings
Sloping or bouncy floors, sagging ceilings, a visibly dipping roof ridge.
Doors and windows
Multiple openings binding at once, gaps appearing at trim and baseboards.
Water, storm or impact damage
Wind, flooding, vehicle impact or long-term leaks affecting framing.
You are changing the building
- Removing a wall or widening an opening
- Adding a room, a second story, or a large deck
- Converting a garage or attic to living space
- Installing heavy equipment, rooftop units or large tile assemblies
- Cutting new openings in a floor or roof
- Correcting unpermitted framing changes made by a previous owner
There is also a third category worth naming: transactions. Buying, selling, insuring or disputing a property often calls for an independent written assessment of structural condition, even when nothing is obviously failing.
When you probably do not need one yet
Fine hairline cracks in drywall seams at a first-year house, a single vertical hairline in a concrete driveway, or a squeaky floorboard are usually not structural questions. If nothing is changing, nothing else is happening, and you are not modifying the building, monitoring and documenting is a reasonable first step.
Frequently Asked Questions
Is a structural engineer the same as an architect?
No. An architect handles design, layout and code compliance broadly; a structural engineer addresses how the building carries load.
Can my contractor decide instead?
Contractors build, and many are experienced, but structural changes and permit documents commonly require an engineering professional.
Do I need one for a small doorway?
It depends on whether the wall is load-bearing and on local permit requirements. Ask your building department or a professional rather than assuming.
Is a home inspection enough?
A home inspection is broad and visual. When it flags a structural concern, it usually recommends a structural engineering professional evaluate that specific issue.
Services
- Foundation InspectionCracks, settlement, uneven floors and slab or pier-and-beam movement.
- Structural InspectionFraming, walls, roof structure and visible movement or deformation.
- Load-Bearing Wall EngineerWall removal, wider openings, beam and header sizing for remodels.
- Pre-Purchase Structural InspectionIndependent structural review before you close on a house.
Related guides
- Structural Engineer Cost GuideWhat drives the price of inspections, reports, calculations and drawings.
- Do Foundation Cracks Need an Engineer?How to read what you are seeing and decide who to call first.
- Engineer vs Foundation Repair CompanyTwo different roles, two different incentives, two different documents.
- When Do You Need a Structural Engineer?Nine common situations where a structural opinion is the right next step.