Invest In Apartment Buildings In O’Fallon, MO

Where O’Fallon's Renter Demand Comes From

O’Fallon is a fast-growing, high-income suburb with a small but quickly expanding renter base. The city has 6,734 renter households, 19% of all households, against 31.9% across Missouri (U.S. Census ACS 2020–2024). That renter count is up 21.9% in five years. Median gross rent is $1,443 a month, well above the state's $1,033, and it has risen 30.8% from $1,103 in the 2015–2019 survey. Median household income is $110,443, up 22.7%, and 42% of renters spend 30% or more of their income on housing.

Growth has been steady for three decades. O’Fallon went from about 28,000 residents in 1995 to more than 69,000 in 2004, according to the St. Louis Fed, and the latest Census survey puts it at 93,801, up 7.5% in five years. Employed residents rose 12.6%, and unemployment is 2.7%. Much of that growth followed jobs. CitiMortgage opened an $85 million financial center in the city in 2003, and Mastercard's global technology and operations headquarters sits on the city's southern edge beside WingHaven. Progress West Hospital is less than a mile from the I-64 office corridor, and the Fort Zumwalt School District is another large local employer. O’Fallon also sits where I-70 and I-64 meet, about 30 minutes west of downtown St. Louis.

For apartment owners, that adds up to renters with steady office, health care and school jobs. A Saint Louis University demographer told KMOV in 2025 that young couples with children often start out in apartments, which helps explain why renter demand has kept pace with the city's growth. High incomes support rents well above the state median, but they also mean many tenants can choose to buy instead.

New Supply And The Apartment Debate In O’Fallon

Apartments are a small share of O’Fallon's housing. The Census counts 3,683 homes in buildings with five or more units, 10.2% of the stock, up 8.1% in five years. The median home was built in 2000, so much of the city's housing, apartments included, is relatively new. Census rental vacancy is just 1.5%, which points to a tight market even though it covers every rental, including houses.

Recent projects show where new units have gone. Watermark Residential announced Avenue64 in 2020, a 316-unit community of three four-story buildings at 1147 Technology Drive, between I-64 and Highway K, with completion expected in August 2022. The Enclave at WingHaven, a 400-unit community in 16 buildings, sits inside the WingHaven master plan. A June 2022 brokerage report counted about 2,500 apartment units under construction within roughly 10 miles of O’Fallon, which includes neighboring cities.

The bigger story for buyers is politics. In November 2025 the Board of Aldermen tabled a proposed one-year pause on new apartment applications. In June 2026 two council members brought back a moratorium on buildings with five or more units, citing traffic and crowded schools. In August 2026 the council rejected a six-month pause by one vote, five yes votes when six were needed, and in September it was reviewing a 10-part study of how apartments affect roads, schools, police, fire and housing costs. Neighboring Dardenne Prairie approved a one-year multifamily moratorium in 2025.

Limits on new building would favor owners of existing communities. The HUD fiscal 2027 two-bedroom Fair Market Rent for the St. Louis metro is $1,349, below O’Fallon's Census median. For apartment syndications in O’Fallon, the open question is whether the city adopts a pause, and how that changes the value of newer properties that already have their approvals.

O’Fallon Areas We Watch

O’Fallon's rental options follow its highways and its employment corridor along I-64.

How O’Fallon Ranks For Apartment Investors

Among the 29 Missouri cities we track, O’Fallon ranks 3rd for median gross rent, 26th for renter share and 9th for five-year rent growth. That puts its rents near the top of the group, so tenants here are already paying more than in most nearby markets. Compared with the 2015–2019 survey, O’Fallon now has about 6,559 more residents, 1,210 more renter households and 276 more homes in buildings with 5 or more units. Renter households grew by about 4.4 for every new home in a larger apartment building. Not every renter lives in an apartment, but demand has clearly kept ahead of new multifamily supply.

O’Fallon And Nearby Markets Side By Side

O’Fallon's median gross rent of $1,443 is above the Missouri median of $1,033, and its renter share is 19% compared with 31.9% statewide.

Rent Versus Income In O’Fallon

The median rent in O’Fallon works out to $17,316 a year, about 15.7% of the median household income of $110,443. Under the common 30% guideline, a household needs about $57,700 a year to cover that rent comfortably. That's a lighter load than the Missouri average of 17.5%. Renters usually earn less than the all-household median, so the real burden for tenants is higher than this simple ratio shows.

Since the 2015–2019 survey, the median rent rose $340 a month ($4,080 a year), while median household income rose $20,432 a year. Rent has outpaced income, so we are careful about how much further a business plan pushes rents on renewal. HUD's FY2027 Fair Market Rent for a two-bedroom unit, $1,349, is 6.5% below the median gross rent for all unit sizes. That gap matters for buildings that accept Housing Choice Vouchers, since local housing authorities base voucher payment standards on it.

Quick Facts: O’Fallon Rental Market

Here's the O’Fallon rental market in short form, with the source on every figure.

• O’Fallon, MO has 93,801 residents, up 7.5% from the 2015–2019 survey (U.S. Census ACS 2020–2024).
• Median household income in O’Fallon, MO is $110,443, up 22.7% over five years (U.S. Census ACS 2020–2024).
• Median gross rent in O’Fallon, MO is $1,443 a month, up 30.8% over five years (U.S. Census ACS 2020–2024).
• 19% of households in O’Fallon, MO rent, about 6,734 renter households (U.S. Census ACS 2020–2024).
• 10.2% of homes in O’Fallon, MO are in buildings with 5 or more units (U.S. Census ACS 2020–2024).
• The rental vacancy rate in O’Fallon, MO is 1.5%, and 42% of renters spend 30% or more of income on rent (U.S. Census ACS 2020–2024).
• The median home in O’Fallon, MO was built in 2000 (U.S. Census ACS 2020–2024).

What We Look For In An O’Fallon Apartment Building

In O’Fallon we focus on apartment buildings with 5 or more units. Some are stabilized and well run. Others have below-market rents or deferred maintenance that a better operator can fix. Either way, the deal has to make sense on current numbers.

Property taxes are a big line item for any Missouri apartment building. We estimate the tax bill as it will be after the purchase, because a sale can trigger a reassessment in many places. Missouri has no statewide rent control law, though local rules on notices, fees and deposits still apply. Insurance quotes in Missouri reflect hail and wind damage, so we get a quote before we make an offer.

Given how fast rents rose here, we assume much slower rent growth going forward and make sure the deal still works if rents stay flat for a while.

Due Diligence For Apartment Syndications In O’Fallon

Whoever the sponsor is, these are the questions we would want answered about any apartment syndication in O’Fallon, based on the local numbers above.

• What vacancy does the plan assume? Rental vacancy in O’Fallon is 1.5%. A plan that assumes much lower vacancy than the market should explain why.
• What rent growth is underwritten? Rents here rose 30.8% over five years. Ask whether the plan assumes that pace continues, and what happens to the deal if rents stay flat.
• How was the property tax bill estimated? A sale often triggers a reassessment, so the bill after purchase can be well above what the seller pays today.
• How big is the repair reserve? The median home in O’Fallon was built in 2000, and even newer buildings need money set aside for roofs, HVAC and appliances.
• How and when does capital come back? Ask what the plan is for a refinance or sale, and what happens if that takes longer than expected.

How Passive Investing In An O’Fallon Apartment Syndication Works

A syndication splits the work from the capital. As general partner, Skyline sources and buys the building, sets the business plan and runs it with a property manager. Limited partners invest money, own part of the property and receive reports, but they don't manage anything day to day.

It's a long-term commitment. The property has to be refinanced or sold before most capital comes back, and the outcome isn't certain. Eligibility rules vary by offering, and most are limited to accredited investors. See investing with Skyline Capital for how we work with limited partners.

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