St. Louis Permit Guide · 2026

Bathroom Remodel Permits
in St. Louis, MO

Permit fees for a bathroom remodel in St. Louis typically run $100–$500. Here's exactly which permits you need, what they cost, and how long MO review takes.

Do you need a permit for a bathroom remodel in St. Louis?

Yes, when fixtures move or new wiring/venting goes in. Swapping a vanity or retiling in place is usually exempt in St. Louis. Permit fees for a typical $21,794 bathroom remodel run about $100–$500 (valuation-based fee plus plan review), and MO plan review typically takes 2–4 weeks.

Permits you'll likely need

Plumbing

relocating fixtures or running new drain/supply lines

Electrical

new GFCI circuits, lighting, or exhaust fan wiring

Building

layout changes, wall moves, or new windows

Usually exempt

Like-for-like fixture swaps (many jurisdictions)

Tile, paint, and vanity replacement

Re-grouting and caulking

How to get bathroom remodel permits in St. Louis

1
Confirm what triggers a permit
Plumbing, Electrical, Building permits apply when the scope includes relocating fixtures or running new drain/supply lines. Cosmetic-only scopes may be exempt.
2
Budget the fee
Plan for $100–$500 in St. Louis — a valuation-based fee on a typical $21,794 project plus plan review.
3
Apply with complete documents
Submit scope, drawings, and contractor license info to the St. Louis building department. MO plan review typically takes 2–4 weeks.
4
Verify it in the bid
A complete St. Louis bid lists permit fees as a line item. If a bid omits permits — or suggests skipping them — analyze it before signing.

Bathroom Remodel permits in St. Louis: FAQ

Do I need a permit for a bathroom remodel in St. Louis?

Yes, when fixtures move or new wiring/venting goes in. Swapping a vanity or retiling in place is usually exempt in St. Louis, MO. When in doubt, call the St. Louis building department before work starts — unpermitted work can block a future sale.

How much do bathroom remodel permits cost in St. Louis?

Expect roughly $100–$500 in St. Louis for a typical $21,794 bathroom remodel. Most jurisdictions charge a valuation-based fee of about 0.5–2% of project value, plus plan review and per-trade permit minimums.

How long does a bathroom remodel permit take in St. Louis?

Simple trade permits are often issued over the counter in St. Louis. Where plan review applies, MO turnaround typically runs 2–4 weeks. Submit complete drawings the first time — resubmittals are the most common cause of delay.

Who pulls the permit — me or my contractor?

Usually your contractor pulls permits for a bathroom remodel, and their license is attached to the work. A contractor who asks you to pull an owner's permit for contractor-performed work is shifting liability onto you — treat that as a red flag when reviewing bids.

More St. Louis permit guides

Bathroom Remodel permits in other MO metros

Is your bathroom remodel bid fair?

A typical St. Louis bathroom remodel runs $21,794. Check your contractor's bid — permits included — against live 2026 local data, free.

St. Louis bathroom remodel costs AUDIT MY BID

Data sources: Zonda Cost vs Value 2025; Houzz 2024 Cost Guides; BLS OEWS 2023; FRED regional price indices; Reddit homeowner & contractor reports.

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Bathroom Remodel Permits in St. Louis, MO