Milwaukee, WI Building Safety: Building Permits (2026)
Key Facts
- Attached deck
- Permit always required
- Freestanding deck
- Permit if over 2 ft high
- Frost footings
- Optional, freestanding only
- Plan review fee
- $50 (shed or deck)
Summary
Milwaukee requires a building permit for any deck attached to the house, and for any freestanding deck over 2 feet above grade.
239-12. Yards and Pool Decks. A permit issued by the department of city development is required for any deck that is attached to a principal building and for any deck that is freestanding and greater than 2 feet above grade. Frost footings are optional for freestanding decks. Decks shall also meet the requirements specified in s. 295-505-3-h.
Full Breakdown
Under Milwaukee Code of Ordinances § 239-12 (Building and Zoning Code, Chapter 239, Accessory Buildings and Structures), the Department of City Development must issue a permit for any deck attached to a principal building, no matter how low it sits, and for any freestanding deck that rises more than 2 feet above grade. A freestanding deck 2 feet or less above grade, the kind most patio-style platforms fall into, does not trigger this permit requirement, and frost footings are optional once a freestanding deck does need one. Any permitted deck must also meet the zoning setback and dimensional standards in § 295-505-3-h. When a plan review is required for a shed or deck accessory to a one- or two-family property, § 200-33-35-a-4 sets the plan review fee at $50.
Violations & Fines
Building without the required permit exposes the deck to a stop-work order and correction notice from the Department of City Development, plus re-inspection and permit fees before the structure can be legalized.
Frequently Asked Questions
Does a low patio deck need a permit in Milwaukee?
Do attached decks always need a permit?
Sources & Official References
Other rules in Milwaukee
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Building Permits in Nearby Cities
How other cities in Milwaukee County handle building permits.