House painting in Mequon.

The Census Bureau’s American Community Survey (2020–2024) puts the median year built for a Mequon home at 1984 (±3 years). The 1990s were the biggest building decade, with 18.9% of the city’s 10,078 housing units, and 42.2% of units date from 1990 or later. Older homes are not rare: 44.6% were built before 1980 and 10.0% before 1950.

It is a city of owned houses. Single-family detached homes make up 72.4% of units and attached single-family homes such as townhouses another 13.5%, and 86.0% of occupied homes are lived in by their owners. The Census Bureau counts 46.3 square miles of land inside the city limits. The Encyclopedia of Milwaukee describes a city that runs from Lake Michigan to the Washington County line. Settlers began arriving in the mid-1830s, and in 1839 about twenty families of German Old Lutherans arrived and founded the Freistadt settlement in its western part. The Town of Mequon became a city in 1957, and nearly half of its land was still undeveloped in 2014.

Those numbers shape the work. On a house from the 1990s or 2000s, a repaint often comes down to caulk that has shrunk at trim and siding joints, sealing the cut ends of engineered or fiber-cement boards, and deciding whether wood siding should be stained again or painted. On an older house, scraping can bring in Wisconsin’s lead-safe rule for homes built before 1978. The Census does not split at that year, so the share can only be bracketed: between 30.9% (built before 1970) and 46.8% (built before 1980) of Mequon’s owner-occupied homes.

The Board’s Guidelines for Residential Structures (revised March 2024) are written for the new homes, additions and exterior alterations that come before the Board, but a few lines speak directly to paint. Painted flues, vents, gutters, downspouts and flashing are encouraged to match the color of the part of the house they project from. Detached garages and sheds are to be consistent with the house, roofing, windows, cladding, trim and color included. And shutters, divided-light windows and trim details shown on one elevation should be repeated on all four.

Those are sound rules for a repaint too. When we paint a Mequon house, we can carry the trim color and details around all four sides, paint gutters, downspouts and vents to match the surface behind them, and finish a detached garage to match the house, the way the guidelines describe.

The guidelines also strongly encourage natural building materials and talk about cedar used with brick, stone or stucco. Cedar needs its own prep. Weathered gray fibers are cleaned or sanded back, and bare cedar gets a stain-blocking primer before paint, because the wood’s tannins can bleed through a latex coat as brown streaks. If your cedar has only ever been stained, staining it again may suit it better than switching to paint, and we will say which at the estimate.

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.

Mequon has no NOAA climate-normals station of its own. The nearest with temperature normals are Germantown, about 6 miles west-northwest of the city’s center in Washington County, and Grafton, about 7 miles north-northeast, and their 1991–2020 normals frame a wide range. At Germantown, the median last spring night of 36°F or colder is May 19 and the first fall one is September 29, and NOAA puts the median season between them at 132 days, shorter than at any of the eight Milwaukee and Waukesha county stations in our painting-season guide. At Grafton the window runs from May 5 to October 11, a 156-day median season. The median freeze dates are May 6 and October 8 at Germantown, and April 23 and October 24 at Grafton.

September is the month in which their counts of cold nights differ most. Germantown’s normal September low is 49.9°F, with 16 nights on average at 50°F or below; Grafton’s is 53.9°F, with about 9 such nights. Germantown’s dates rest on 30 years of data and Grafton’s on 12, and neither describes a single yard in a city of 46 square miles. Menomonee Falls reads Germantown too, beside Mt Mary College (our Menomonee Falls page). With standard latex, plan exterior work for June through August; September often calls for a low-temperature paint, and early October depends on one and on the forecast.