Home improvement across Waukesha County

The eastern third of the county is post-war suburb. The Encyclopedia of Milwaukee records New Berlin growing from 5,334 people in 1950 to 26,901 in 1970, and notes that the freeways of the 1960s opened Waukesha County to suburban growth. The Census median year built is 1975 in Brookfield, 1978 in New Berlin and 1988 in Muskego, which puts the typical east-side house in the 1970s or 1980s, with the roofs, siding, windows and kitchens that age brings. The City of Waukesha, the county seat, is older at its center; its spring-resort era lasted until 1918, and 11.5% of its units predate 1940. See the Waukesha page for that city.

West of the city is lake country. The Wisconsin DNR lists Pewaukee Lake at 2,437 acres and Lac La Belle at 1,154, and the Encyclopedia recalls the “numerous summer hotels that dotted lakes like Pewaukee, Okauchee, and Pine.” Oconomowoc, once called the “Newport of the West,” still has 13.5% of its housing from before 1940, while the City of Pewaukee has the newest stock of any place C&L covers, with a 1993 median. Muskego sits on the county's southeast edge, bordering Milwaukee County at Franklin and Racine County at the Town of Norway, with its own Big and Little Muskego lakes. From there, New Berlin is about 6 road miles and Oconomowoc about 31.

The map itself keeps changing, and that matters because the municipality, not the county, decides what needs a permit. The former Town of Pewaukee became a city in 1999; Summit became a village in 2010; the Town of Waukesha became the Village of Waukesha in 2020, a change the City of Waukesha fought in court until 2024; Vernon became a village the same year; Lisbon followed in 2023. On January 1, 2025, most of the Town of Oconomowoc joined the Village of Lac La Belle, leaving a small remnant town. Several names are also shared by two separate governments, such as the City and Town of Brookfield and the City and Village of Pewaukee. Before you call about a permit, confirm which one you live in.