Safe to DIY (no permit, no danger)
• Faucet swap (existing supply lines) • Toilet replacement (same flange) • Garbage disposal swap (same brand, plug-in model) • Showerhead • Outlet swap (existing properly grounded circuit, you've identified line/load correctly) • Light fixture swap (turn the breaker off, capture wires by color) • Smart thermostat replacement (existing C-wire) • Air-filter replacement (HVAC + dryer) • Sump-pump swap (like-for-like in existing pit) • Outdoor hose-bib drainage / winterizing
Hire a pro (Lucas County permit required)
• Water heater replacement (gas OR electric) • Tankless water heater conversion • Main water-line replacement • Sewer-line replacement • Gas-line install / extension / leak repair • Furnace / AC install or replacement • Heat pump install • Panel upgrade or sub-panel install • EV charger installation • Bathroom rough-in (new bath) • Whole-house humidifier or dehumidifier
Hire a pro (no permit, but specialized)
• Refrigerant work — EPA Section 608 required by federal law • Anything in a knob-and-tube or aluminum-wired house • Federal Pacific or Zinsco panel work — these brands are recall-territory • Gas-fueled appliance hookup (range, dryer) • Roof work (insurance + fall risk)
Honest cost-vs-DIY math
A faucet swap takes a homeowner ~90 min, a plumber 20 min — but plumber labor is $145+. Faucet swap = DIY win. A water heater swap takes a homeowner ~6 hours and may fail Lucas County inspection — plumber does it in 90 min with permit. Water heater = pro win.
Frequently asked
Can I pull a permit myself as a homeowner in Toledo?
Yes — Toledo + Lucas County allow homeowner permits for work on your own primary residence. Call (419) 213-4830 for the homeowner permit packet. You'll be held to the same inspection standard as a contractor.
What if my insurance asks if work was done by a licensed pro?
Many homeowner policies have provisions that void coverage for damage caused by unpermitted DIY work. Photograph everything. If the work later causes a claim, you may be denied. Worth asking your agent before tackling anything ambiguous.