Most standard Northern Michigan custom homes on normal lots with conventional wood framing
never require engineering involvement beyond what the code's prescriptive tables already cover.
Engineering is only required when a specific design element exceeds the IRC's prescriptive limits — for example, a beam span larger than the code tables allow, or a hillside lot with a grade slope steeper than 1:5 (20%). When that happens, it's only that specific element that needs engineering — not the whole house.
Common triggers in Northern Michigan:
- Open-concept great rooms where wall bracing lines are more than 25 feet apart
- Hillside or waterfront lots with significant grade change
- Large spans — floor beams, ridge beams, or oversized headers
- Cantilevered structures beyond prescriptive limits
- Retaining walls over approximately 4 feet of retained height
- Non-conventional systems like ICF or SIPs
When any of these come up, we identify them, note them on the drawings, and flag exactly what needs to be engineered. From there, the builder or homeowner engages and pays for the licensed engineer directly — we don't act as the intermediary. This is standard practice for residential designers and it keeps costs contained — you're only paying for engineering where it's actually needed.