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West Allis, WI Building Setbacks & Zoning: Lot Coverage Limits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

RA-1 / RA-2 max
40% lot coverage
RA-3 max
50% lot coverage
RB max
60% lot coverage
Commercial/industrial
no cap listed
Governing section
RMC § 19.41

Summary

The West Allis zoning code caps building lot coverage at 40% in the RA-1 and RA-2 districts, 50% in RA-3, and 60% in RB, with no listed cap for commercial or industrial districts.

No building, except a residential accessory building, may exceed the minimum and maximum standards set forth in the table below. If any cell is blank, no limit is imposed. ... RA-1 RA-2 RA-3 RB RC C-1 C-2 C-3 C-4 I-1 I-2 P SF ... Lot Coverage (maximum) 40% 40% 50% 60%

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: ?).

Full Breakdown

Chapter 19's Building Size and Location table (§ 19.41) sets maximum lot coverage by zoning district: 40% in the RA-1 and RA-2 single- and two-family districts, 50% in RA-3, and 60% in the RB district. The table applies to all buildings except residential accessory buildings, which are governed separately under § 19.42. Districts without a listed percentage, RC and the C-1 through C-4, I-1, I-2, P, and SF districts, carry no lot-coverage limit under this table, since the code states that a blank cell means no limit is imposed. Owners should confirm their parcel's zoning district before figuring buildable footprint.

Violations & Fines

Violating any Chapter 19 zoning provision, including the lot coverage table, carries a forfeiture of $25 to $500 per offense plus prosecution costs; each day a violation continues is a separate offense under § 19.12.

Frequently Asked Questions

Does West Allis limit lot coverage in commercial districts?
No. The § 19.41 table leaves the Lot Coverage row blank for C-1 through C-4, I-1, I-2, and P, and a blank cell means no maximum applies.
Do accessory buildings count toward the lot coverage cap?
No. The § 19.41 table applies to buildings other than residential accessory buildings, which have their own coverage limits under § 19.42.

Sources & Official References

Other rules in West Allis

Parking Rules: Street Parking LimitsSome RestrictionsSetback RulesSome RestrictionsParking Rules: RV & Boat ParkingSome RestrictionsStructure Height LimitsSome RestrictionsNoise Ordinances: Barking DogsSome RestrictionsParking Rules: Snow Removal Parking RulesSome RestrictionsParking Rules: Driveway RulesSome RestrictionsParking Rules: Commercial & Oversized VehiclesSome Restrictions

All West Allis rules

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