St. Louis, MO-IL · Missouri

Warren County

36,467 residents378 permits TTM$77,989 median HHI6 ZIP codesUpdated April 16, 2026
Investor first look

Median home value

$241,200

ACS 5-Year

Cap rate proxy

6.1%

FMR × 0.65 ÷ Home Value

Rent-to-income

14.0%

HUD FMR ÷ ACS HHI

Net migration

+3.04%

IRS SOI

Permits (TTM)

378

Census BPS

Climate risk

55.3

FEMA NRI (0–100)

ZIP code breakdown6 ZIP codes
ZIPMedian home valueRent (FMR 2BR)Gross yieldBuy Box scoreSection 8 gap
63357$241,200$1,2206.1%0.833.6%
63351$241,200$9904.9%0.78.4%
63390$241,200$1,0905.4%0.719.4%
63383$241,200$1,1005.5%0.520.5%
63380$241,200$1,1905.9%30.3%
63381$241,200$1,1105.5%21.6%

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Demographics

Owner-occupied

82.4%

Census ACS

Vacancy rate

15.3%

Census ACS

Bachelor's degree +

19.6%

Census ACS

Rent burdened

42.9%

Census ACS (>30% income)

Median age

40.8

Census ACS

Data sources
U.S. Census Bureau — American Community Survey 5-Year Estimates
U.S. Census Bureau — Building Permits Survey
U.S. Department of Housing and Urban Development — Fair Market Rents / Small Area Fair Market Rents (SAFMR)
Internal Revenue Service — Statistics of Income Migration Data
FEMA — National Risk Index
Last updated: April 16, 2026