Johnston is a steady, established suburb, and the numbers make the investor case clear before we ever tour a house. It had 24,064 people at the 2020 Census and 25,065 in the Census Bureau's July 1, 2025 estimate - about 1,000 more, roughly 4.2%. That is slower growth than Ankeny or Polk City, with a higher typical value than either Ankeny or Altoona. Here is how I think about what that means for a rental or a house hack.
Johnston is largely built out, so the story is stability rather than new construction. It is home to Camp Dodge, the Joint Maneuver Training Center where the Iowa Gold Star Military Museum sits, and Terra Park spans more than 200 acres around an eight-acre lake, with a trailhead on the Neal Smith Trail nearby. Those are reasons people want to be here; they are not a guarantee about any one property.
The constraint is entry price. Fewer recent sales and a typical value above $400,000 mean you are buying into a tight, higher-priced market, and the strategy has to account for it.
At the typical value of $400,200, a home would need about $4,002 a month in rent to meet the 1% rule (1% of $400,200 is $4,002). That is a high bar for a single-family rental, so pure cash flow is usually the hardest thing to find in Johnston. Investors who buy here tend to be making a long-hold play, where principal paydown and appreciation carry more of the return, or they find a property well below the typical value that needs work.
A larger Johnston home with a finished lower level, or extra bedrooms you can rent by the room, changes the math: you are offsetting your own payment rather than carrying the whole thing on rent. My guide to house hacking in Johnston walks through the layouts and the numbers.
My free deal calculator runs the first three in minutes. Before you close, ask the City of Johnston about rental registration or inspection rules for the property, and read any HOA covenants for leasing limits.
If you have a Johnston address in mind, send it over and I'll run the numbers with you - a straight answer on whether it works as a rental, a house hack, or neither. For the bigger picture, see the full Johnston overview or what living in Johnston is like. Comparing towns? The same guide exists for Ankeny, Polk City and Altoona.
Sources: US Census Bureau (2020 Census and July 1, 2025 estimates via QuickFacts; 2020 place-by-county file; 2024 Gazetteer internal points; school-district boundaries via TIGERweb); Zillow Home Value Index through September 30, 2026 (a typical-value estimate, not an MLS closed-sale median); Zillow market report email, October 24, 2026; City of Johnston (Terra Park); Iowa Gold Star Military Museum. Distances are straight-line miles between Census city points; the drive is longer.
Jackson Krile is a REALTOR® on the Flanders Team at RE/MAX Real Estate Center. Licensed in Iowa #S66867000. DMAAR + CIBR member. Educational only, not financial advice.
Run your numbers in the deal calculator, or send me a specific property and I'll run it with you. Whenever you're ready, I'm here.