House painting in West Allis.

The Census Bureau’s American Community Survey (2020–2024) counts 30,294 housing units in West Allis and puts the median year built at 1956 (±1 year). A quarter of them (25.8%) date from 1939 or earlier, and the 1950s were the busiest single decade, with 22.3%. Altogether 59.0% were built before 1960 and 83.9% before 1980; just 9.9% have gone up since 1990.

The city grew around one employer. The Encyclopedia of Milwaukee tells how the Edward P. Allis Company, later Allis-Chalmers, moved west along Greenfield Avenue to 70th Street in 1900; the Village of West Allis took its name in 1902 and became a city in 1906, with 2,306 residents, and as Allis-Chalmers grew, thousands of houses went up around the plant. Annexation stopped through the Depression and the war, resumed in 1948 and ended in 1954 with the whole west side, which doubled the city to its present 11.5 square miles.

On houses of this age, a repaint is mostly a question of what lies underneath. Decades of coats can build up on clapboard, trim, porch ceilings and window sash, and when the oldest layers lose their grip the paint comes away in sheets instead of flaking at the surface. At the estimate we find where the failure starts, because that decides how far the scraping and sanding go and how much bare wood needs spot-priming.

Age also settles the lead question for most of the city. The Census bins do not split at 1978, but they put the share of West Allis’s owner-occupied homes built before that year between 84.7% (built before 1970) and 90.4% (built before 1980). The city’s housing program goes further and assumes that every home built before January 1, 1978 contains lead-based paint (see the rehab loans below).

West Allis puts it plainly. Its property maintenance code says that “chipping, flaking or peeling paint on any exterior surface is prohibited.” The same section (§13.28) asks for walls, siding, eaves, soffits, chimneys, porches, decks, guardrails and handrails to be weathertight and painted or given a comparable finish, for windows, doors and storms to be painted or finished as well, and for metal trim and other ferrous parts to be kept free of rust. It applies to every building in the city, garages and sheds included.

Inspections under that section follow a written complaint, reasonable grounds to believe a violation affects public health, safety or welfare, or a direction from the Common Council or the district alderperson. A written order describes the violation and sets a reasonable time to comply, which the inspector may extend depending on how serious the problem is and how long the fix takes. Forfeitures under chapter 13 run from $25 to $500 per violation, and each day a violation continues counts as a separate one (§13.26). If you have an order, bring it to the estimate so the scope and the dates can follow it.

Painting itself needs no permit. Section 13.05 lists it, with replacing tile, flooring and cabinetry, among work that needs no building permit, and for one- and two-family homes it also exempts replacing nonstructural siding and same-size windows. Repairs that change structural strength, egress, light or ventilation are another matter, and the city’s permit guide says a permit may be needed to replace wall framing if prep uncovers structural damage. The same guide notes that painting basement walls needs no permit, as long as no walls are built and no rooms created.

Wisconsin’s Lead-Safe Renovation Rule applies to a home or property built before 1978 when the work will disturb more than 20 square feet of painted surface outside, more than 6 square feet of painted surface per room inside, replace windows, or involve demolition. That work must be done by a certified Lead-Safe Renovator working for a certified lead company. The Wisconsin Department of Health Services publishes a list of certified companies, updated monthly, so you can check any contractor.

West Allis formed its Historical Commission in 1998. The seven-member body meets at City Hall as needed, with staff support from Economic Development, and the city lists among its projects National Register listings for properties and districts, designating city landmarks, the annual Settler’s Weekend, promoting and preserving the mid-1800s log cabin school in Honey Creek Park, and preserving the Seneca Station, listed on the National Register in 2004.

NOAA keeps a climate-normals station named West Allis, about 1.6 miles from the city’s center by our arithmetic. In its 1991–2020 normals, half of years see the last night of 36°F or colder after May 8 and the first one of fall before October 10, a median season NOAA puts at 156 days. Hales Corners, under 5 miles south, has 141. That makes West Allis the third-longest of the eight stations in our painting-season guide, behind only Mitchell Airport and South Milwaukee, the two nearest Lake Michigan. Its median freeze dates are April 26 and October 22.

Summer nights there are reliably warm. July averages 0.2 nights at 50°F or below and August 0.8, against 5.0 in June and 10.2 in September, and normal lows are 58.1°F in June, 63.1°F in July and 54.3°F in September. May and October each average more than 22 such nights. With standard latex, June through August is the dependable window at this station; September, with about ten cold nights, needs the forecast or a low-temperature paint, and May and October need both. The figures rest on 10 to 11 years of data, so treat them as a guide, not a promise for your block.

U.S. Census Bureau (tables B25003, B25024, B25034, B25035, B25036): American Community Survey 2020–2024 housing tables, read October 22, 2026.

U.S. Census Bureau (internal point used for the station distance): 2024 Gazetteer file of Wisconsin places, read October 22, 2026.

Encyclopedia of Milwaukee (University of Wisconsin–Milwaukee), entry on the City of West Allis: City history, read October 22, 2026.

City of West Allis, Code Enforcement: Do I need a permit?, read October 22, 2026.