Do I need a permit for that?

The honest answer: it depends on the county and whether you're inside city limits.

• Docks and seawalls — county building department, and on some lakes a water management district permit as well.
• Sheds — usually exempt under a size threshold, but setbacks still apply.
• Fences — generally no permit in unincorporated areas; city limits differ.
• Mobile and manufactured homes — always permitted, with tie-down and setup inspections.

Call the building department listed on your county's page before you build. Ten minutes on the phone beats a stop-work order.