🔧 Plumbing Permit in Green Bay, WI

📋 Quick Facts — Plumbing Permit in Green Bay

Do I Need a Plumbing Permit in Green Bay?

The short answer: almost always yes. REQUIRED for any work on a plumbing system beyond simple fixture replacement — and Green Bay is no exception. The City of Green Bay Department of Inspection Services enforces plumbing permit requirements for residential and commercial work.

✅ Work That Always Requires a Permit

• Water heater replacement (gas or electric)
• New plumbing rough-in (new supply and drain lines)
• Moving existing plumbing supply or drain lines
• Adding new plumbing fixtures (sink, toilet, shower)
• Water service line replacement
• Sewer lateral repair or replacement
• Gas line work (new or modification)

⚠️ Work That May Be Exempt

• Replacing a faucet on an existing supply line (no pipe work)
• Replacing a toilet on existing rough-in (some jurisdictions)
• Clearing a drain clog (maintenance work)

💰 Plumbing Permit Fees in Green Bay (2026)

Permit fees in Green Bay are set by City of Green Bay Department of Inspection Services. Here's the current fee structure for plumbing work:

Verify with Green Bay Inspection Services — (920) 448-3400.

* Fees may change. Always verify current rates with City of Green Bay Department of Inspection Services at https://www.greenbaywi.gov/441/Inspection-Services.

🔍 Inspection Requirements

After the permit is issued, Green Bay requires inspections at key stages. Do not cover work before it's inspected.

• Rough-in Inspection: Inspector checks all supply and drain lines before walls are closed. Pipe material, slope of drain lines (1/4 inch per foot minimum), proper venting, and water test.
• Final Inspection: Verifies all fixtures are installed and functioning, water heater is properly vented and strapped, T&P valve discharge is correct, no leaks.

📝 How to Apply for a Plumbing Permit in Green Bay

1. Verify your contractor is licensed — Licensed plumber (state-specific license) in most states. Some states allow homeowners for owner-occupied single-family homes. Plumber's license required in CA, FL, TX, NY, IL, PA, and most major states..
2. Gather required documents — Equipment specs, site plan, load calculations where applicable.
3. Submit the application — Online at City of Green Bay Department of Inspection Services or in person.
4. Pay the permit fee — $50–$150 (ESTIMATED).
5. Post the permit — Keep a copy on-site until all inspections pass.
6. Schedule inspections — Do not cover work until the inspector signs off.

📌 Wisconsin State Requirements

In addition to Green Bay's local rules, these state-level requirements apply:

• Wisconsin has own modified code — NOT the IRC or IBC directly
• Older NEC (2017) and IRC (2015) base — Wisconsin code updates slowly
• Wisconsin SPS (Safety and Professional Services) for licensing
• Milwaukee has own permit office

→ Wisconsin Licensing Board

🚫 Common Plumbing Permit Mistakes in Green Bay

• Skipping the permit on water heater replacement — most common unlicensed plumbing violation
• Wrong T&P valve discharge pipe material (CPVC not allowed in some jurisdictions — must be copper or galvanized)
• Missing expansion tank on closed systems (required when backflow preventer is present)
• Not strapping water heater in seismic zones

💡 Pro Tips from Contractors

• Water heater permits are usually same-day, over the counter — takes 15 minutes to pull
• In CA: seismic strapping is strictly enforced — both upper and lower straps required, specific heights
• Gas water heaters need B-vent inspection before firing up — confirm with inspector
• In most cities, you can pull the permit online same day — no need to go to the building department

Notes specific to Green Bay:

• Third-largest city in WI — active market
• WI DSPS electrical permits
• Brown County handles unincorporated areas

❓ Frequently Asked Questions

🔗 Related Permit Pages

Other trades in Green Bay:

Other cities in Wisconsin: