The Two Cedarburgs: Why One Median Price Hides Two Different Markets

If you have been watching Cedarburg on the portals, you have probably noticed the numbers refuse to agree. One site shows a March 2026 median sale of $589,000. Another shows a July 2026 list median of $727,000. A third puts the active average above $865,000. The gap is not a data glitch. It is the sound of two different municipalities being averaged into one line item.

Before you compare any of those figures to your budget, there is a piece of paperwork worth reading first. In 2021, the City of Cedarburg and the Town of Cedarburg signed a cooperative boundary agreement that quietly determines which parcels can be annexed into the City over the next twenty years. Where your prospective address sits inside that boundary map matters more to your long-term tax picture than any Zestimate.

What the portal median is actually averaging

The word "Cedarburg" points at two legally separate places that share a ZIP code, a school district, and almost nothing else on a tax bill.

The City incorporated out of the Town in 1885 and has been annexing parcels for residential subdivisions ever since. Even the Wikipedia entries for the two governments acknowledge the split, with the Town of Cedarburg's official planning page noting that the 2021 boundary agreement was designed to bring certainty to which lands are not subject to annexation or extraterritorial plat review by the City.

When Redfin, Movoto, Zillow, and the MLS report on "Cedarburg," they are usually reporting on the 53012 ZIP, which spans both jurisdictions plus surrounding rural land. Any median that pools a 1,720-square-foot Craftsman on a City lot with a 5,000-square-foot brick estate on a wooded Town acre is describing an average person who does not exist.

Why the numbers you are reading disagree by six figures

Redfin's city-level report showed a $589,000 median sale price in March 2026, up 35.4% year over year, with homes going pending in about 39 days. The 53012 ZIP report from Redfin covering the three months ending May 2026 showed a $570,000 median across 53 transactions, up 20% year over year. Movoto's July 2026 snapshot listed the median asking price at $727,000. A local brokerage aggregator showed 25 active listings in late April 2026 averaging $865,332, with the top-priced property at $1,999,000.

Each of those numbers is defensible on its own terms. Stacked side by side, they describe three different Cedarburgs.

The March sold-median leans on downtown-adjacent and walk-to-schools inventory that turned over quickly. The 53012 rolling three-month figure smooths in Town-side transactions, which trend larger, older, and more variable. The July list median and April active average are dominated by higher-end estates that sit on the market longer, get counted every week, and drag the average upward. If you are searching from Chicago, which was the top out-of-metro origin of Cedarburg buyer searches in late 2025 per Redfin's migration data, the difference between a $589,000 sold median and a $727,000 list median is roughly one year of mortgage payments.

The boundary agreement most buyers never hear about

The 2021 cooperative boundary agreement between the City and the Town does two things a buyer should care about. It defines a twenty-year growth area where Town parcels are eligible for annexation at the request of the property owner. And it defines land outside that growth area as off-limits to City annexation and extraterritorial plat review.

A Town parcel inside the growth area may one day become a City parcel. A Town parcel outside it will remain a Town parcel for the life of the agreement.

That distinction affects future road maintenance responsibility, water and sewer eligibility, garbage service, and the tax rate you will be paying in ten years. The Town Board unanimously adopted an updated Comprehensive Plan on November 6, 2024 with a horizon out to 2050, and the Zoning Code update targeted for late 2025 is expected to introduce mixed-use options at the Five Corners Town Center. A parcel a mile from Five Corners in 2026 may have neighbors it does not have today by 2036.

Ask the listing agent where the parcel sits relative to the growth area on the Town Zoning map. If the answer is a shrug, that itself is information.

What each Cedarburg actually buys you

In the City

Your search space is roughly 4.87 square miles bordered by Grafton to the east, Mequon to the south, and the Town on the north and west. Downtown holds more than 200 preserved buildings on and around the Washington Avenue Historic District, most of them built between the 1840s and the 1920s. Housing stock skews Greek Revival limestone cottage, Italianate townhome, Queen Anne Victorian, and Craftsman, with new construction filling in on the north and west edges. A recently sold 1,720-square-foot ranch on Crestview Drive closed for $465,000 in July 2026 against a $449,900 list. A 2,265-square-foot Colonial on Arbor Drive closed at $616,000. That is the middle of the City market this summer.

You are buying access to a walkable downtown that runs on foot traffic for the Wine & Harvest Festival, Strawberry Festival, and the Christmas lighting run. You are also buying a shorter drive to schools and a higher municipal tax rate.

In the Town

Your search space is roughly 25.6 square miles wrapped around the City on three sides and reaching into Hamilton, Horns Corners, and Decker Corner. The Cedarburg covered bridge, the Concordia Mill, and the Hamilton Historic District all sit inside Town lines and all three are on the National Register of Historic Places. Subdivisions such as The Reserve, Behrens, and Hidden Valley Lake sit on lots that would be zoned out of existence inside the City. Recent MLS activity has included a beautifully remodeled 1800s stone farmhouse formerly known as Stonehaven Farms, a 29-acre horse property, and a 5,200-square-foot all-brick estate on nearly an acre.

You are buying acreage, a lower municipal tax rate, and a longer commute to almost everything except downtown Cedarburg itself, which is often only five or ten minutes away. You are also buying whatever the boundary agreement says about your parcel's next twenty years.

The county pressure sitting behind both markets

Ozaukee County posted a $511,100 single-family median sale price in May 2026, up 17.5% year over year in Wisconsin Real Estate Transfer Return filings. Only Waukesha topped it on absolute price among Wisconsin counties, and only a small handful of markets matched its year-over-year appreciation rate. Cedarburg is the tightest submarket inside that already-tight county. Available inventory sat at roughly 1.5 months of supply this spring, well below the five-month threshold economists use to describe a balanced market. Sale-to-list ratios have been running above 105% for well-priced homes.

Chicago buyers were the largest single out-of-metro source of Cedarburg searches at the end of 2025. They generally arrive to the portals having already normalized $700,000 as a starter number. A local buyer arrives with $500,000 in mind. Both are looking at the same MLS. Only one of them is looking at the same house.

Questions worth asking before you write an offer

Is this address inside the City or the Town? The mailing address will read "Cedarburg, WI 53012" either way. The tax bill will not.

If it is in the Town, is it inside the twenty-year growth area? The Town Zoning map, referenced in the Town's official planning materials, shows the boundary. Parcels inside can request annexation; parcels outside cannot.

Is the listing priced to the neighborhood or to the ZIP? An agent who cannot answer that question has not done the comparable analysis. In a market at 105% of list, the pricing method matters.

What does the Comprehensive Plan say about the parcels around this one? The Town's plan runs to 2050. The Five Corners Town Center is designated for future mixed-use. A quiet country address in 2026 may border a commercial node in 2036.

Cedarburg on the portal looks like one market. Underneath, it is two, and the paperwork that separates them was signed in 2021 and will govern the next twenty years of tax and service decisions. A buyer who reads the boundary map before the listing sheet ends up with fewer surprises.

If you would like a portfolio-first review of your budget against the two Cedarburg markets, or a quiet look at private and off-market inventory that never lands on the portals, Kelton Hatton works one client at a time across the North Shore and Ozaukee corridor. Request a Free Home Valuation to start the conversation with numbers that belong to your address, not the ZIP.