Location: San Antonio-New Braunfels, TX | Metro: Austin-Round Rock-San Marcos, TX MSA
Based on 1% Rule: A+ (≥1.5%) | A (≥1.2%) | B (≥1.0%) | C (≥0.8%) | D (≥0.6%) | F (<0.6%)
| Unit Size | Monthly FMR |
|---|---|
| Studio | $1,120 |
| 1 Bedroom | $1,190 |
| 2 Bedrooms | $1,410 |
| 3 Bedrooms | $1,780 |
| 4 Bedrooms | $2,090 |
| 5 Bedrooms | $2,424 |
| 6 Bedrooms | $2,715 |
| 7 Bedrooms | $2,932 |
| 8 Bedrooms | $3,079 |
Zillow median home prices vs Section 8 FMR rates (Data: 2026-08-31)
| Bedrooms | Monthly FMR | Median Price | 1% Rule | Grade |
|---|---|---|---|---|
| 2BR | $1,410 | $277,700 | 0.51% | F |
| 3BR | $1,780 | $291,465 | 0.61% | D |
| 4BR | $2,090 | $347,809 | 0.6% | D |
| 5BR | $2,424 | $416,154 | 0.58% | F |
U.S. Census Bureau data (2024)
San Marcos, zip code 78666, defines itself as a university-driven hub anchored by Texas State University, which infuses the area with a consistent student and faculty population. This major institution drives the local economy and reinforces a youthful, rental-heavy demographic. The city is bisected by the San Marcos River, supporting a robust tourism sector centered around tubing and outdoor recreation, particularly in the prime summer months. Recent development has focused on expanding multi-family housing to accommodate the growing student body, while the downtown square continues to attract visitors with its historic character and local businesses.
Investors must navigate a specific pricing spread here. The HUD Fair Market Rent (FMR) for a 2-bedroom unit is $1,480, while the current market rent (Zillow ZORI) sits lower at $1,385, creating a negative gap of $95. This means standard voucher payments may exceed typical market rates, offering a potential premium. However, the sales side shows caution; the median home value is $313,972 and median days on market linger at 126 days, suggesting a slower turnover environment where cash flow must carry the investment strategy.
With a renter share of 61.9%, the demand for housing is structurally high, supported by a median household income of $54,737. This income level, combined with the presence of the university, suggests a robust tenant pool where Section 8 vouchers can provide stability for lower-income service workers or university staff families. While the city offers amenities like the outlet malls and river access, reliance on personal vehicles is typical, meaning properties near the university or major transit corridors hold the most appeal for tenants relying on local infrastructure.
The verdict for 78666 leans toward stability and cash flow through the Section 8 program rather than rapid appreciation. The $95 gap between the 2BR FMR ($1,480) and market rent ($1,385) is a tangible advantage for voucher holders, potentially ensuring consistent payment even in a market with a 126-day selling cycle. Investors should target cash-flowing properties near the university to capitalize on the 61.9% renter majority, using the higher HUD ceilings to buffer against the sluggish sales market.
Data Sources: FMR data from HUD (2027). Median home prices from Zillow (2026-08-31). Demographics from U.S. Census (2024).
About FMR: Fair Market Rent (FMR) is used to determine payment standards for the Section 8 Housing Choice Voucher program, initial renewal rents for some expiring project-based Section 8 contracts, and rent ceilings for HOME Investment Partnerships.