St. Louis, MO-IL · Missouri
St. Charles County
ZIP 63373
409,830 residents1,732 permits TTM$102,912 median HHI14 ZIP codesUpdated April 16, 2026
Investor first look
Median home value
$296,800
ACS 5-Year
Cap rate proxy
4.9%
FMR × 0.65 ÷ Home Value
Rent-to-income
15.3%
HUD FMR ÷ ACS HHI
Net migration
+1.91%
IRS SOI
Permits (TTM)
1,732
Census BPS
Climate risk
92.6
FEMA NRI (0–100)
ZIP 63373
Median home value
$296,800
Gross yield
4.7%
Cap rate
5.3%
Rent gap
-12.1%
Affordability
P/I: 2.3R/I: —
Section 8 detail
SAFMR: $1,170Rent: $1,312Gap: -10.8%
ZIP code breakdown14 ZIP codes
| ZIP | Median home value | Rent (FMR 2BR) | Gross yield | Cap rate | Rent gap |
|---|---|---|---|---|---|
| 63365 | $296,800county est. | $1,380 | 5.6% | 5.3% | 4.9% |
| 63386 | $296,800county est. | $1,050 | 4.2% | 5.3% | -24.9% |
| 63373 | $296,800county est. | $1,170 | 4.7% | 5.3% | -12.1% |
| 63366 | $355,302 | $1,390 | 4.7% | 6.0% | -28.9% |
| 63348 | $430,580 | $1,750 | 4.9% | 3.7% | 25.0% |
Ranked by composite score
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Demographics
Owner-occupied
80.7%
Census ACS
Vacancy rate
3.6%
Census ACS
Bachelor's degree +
42.4%
Census ACS
Rent burdened
37.6%
Census ACS (>30% income)
Median age
39.6
Census ACS
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