San Antonio-New Braunfels, TX · Texas
Guadalupe County
ZIP 78670
178,368 residents1,717 permits TTM$93,776 median HHI7 ZIP codesUpdated April 16, 2026
Investor first look
Median home value
$285,900
ACS 5-Year
Cap rate proxy
6.0%
FMR × 0.65 ÷ Home Value
Rent-to-income
18.4%
HUD FMR ÷ ACS HHI
Net migration
+3.54%
IRS SOI
Permits (TTM)
1,717
Census BPS
Climate risk
91.5
FEMA NRI (0–100)
ZIP 78670
Median home value
$285,900
Gross yield
7.0%
Cap rate
6.0%
Rent gap
13.8%
Affordability
P/I: 3.0R/I: —
Section 8 detail
SAFMR: $1,670Rent: $1,439Gap: 16.1%
ZIP code breakdown7 ZIP codes
| ZIP | Median home value | Rent (FMR 2BR) | Gross yield | Cap rate ↓ | Rent gap |
|---|---|---|---|---|---|
| 78108 | $328,043 | $2,140 | 7.8% | 6.6% | 15.1% |
| 78130 | $302,877 | $1,620 | 6.4% | 6.3% | 1.6% |
| 78670 | $285,900county est. | $1,670 | 7.0% | 6.0% | 13.8% |
| 78155 | $267,543 | $1,260 | 5.7% | 6.0% | -6.6% |
| 78124 | $336,603 | $1,370 | 4.9% | 5.1% | -5.0% |
| 78638 | $357,734 | $1,360 | 4.6% | 4.8% | -5.8% |
| 78123 | $421,178 | $1,260 | 3.6% | 4.1% | -14.2% |
Sort by any column. Click a ZIP for detail. Rent gap: green = HUD FMR above market rent.
Demographics
Owner-occupied
78.5%
Census ACS
Vacancy rate
6.6%
Census ACS
Bachelor's degree +
30.9%
Census ACS
Rent burdened
40.3%
Census ACS (>30% income)
Median age
37.5
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