621 Porter St

San Antonio, TX 78210

$99,900B

3 bd · 1.0 ba · 1,002 sqft · Built 1908 · SingleFamily · Pending · 4 DOM

Cashflow @ list (25.0% down · 7.5%)

• Estimated rent: $1,490/mo
• Mortgage (P&I): −$524
• Tax + insurance: −$376
• HOA: −$0
• Vac / Maint / Mgmt: −$313
• Net cashflow: $278/mo
• Annual: $3,331/yr
• Cap rate: 9.63%
• Cash-on-cash: 11.91%
• DSCR: 1.53
• 1% rule: 1.49%
• Cash to close: $27,972

Investor read

• This is a 3-bed/1.0-bath single-family listed at $100k.
• At list price, monthly cash flow is $278 ($3k/yr) — positive.
• The deal already cash-flows at list — no discount required.
• Meets the 1% rule at list price ($1k rent vs $100k).
• Only 4 days on market — expect competitive offers; lowballing is unlikely to land.
• Local home prices are declining (-3.0%/yr); year-one equity from $691 of loan paydown is wiped out by about $3k of value loss. Plan a longer hold.
• Location reads 80/100 on livability (#31 in TX, #1,616 nationally) — a professional / high-income tenant draw. Strengths: amenities A+, commute A+, cost of living A+; Watch: schools C-, crime F.
• San Antonio ISD (urban): math 12% / reading 22% proficiency, ranked #805 of 826 in TX (top 98%) — low school quality limits family demand, transient renter base, plan for 1-2y turnover; 80% free/reduced lunch — lower-income household profile, screen leases tightly.
• Watch-outs: property tax is 4.0% of price; built in 1908 — expect roof / HVAC / electrical / plumbing capex.
• Market conditions: Rents rising (+1.1%/yr); 280 active listings in the ZIP; 40 comparable units currently listed for rent nearby; rentals at typical pace (median 25d on market — plan ~3-4 weeks tenant-placement turnaround); 8,308 units permitted in Bexar County in 2024 (2,506 in 5+ unit buildings).
• Bexar County population projected at +50% by 2050 — long-run rental-demand tailwind backs the buy-and-hold thesis.
• 3 sale attempts since 11y ago with the ask held roughly flat each time — persistent listings suggest the price (not the market) is what's stuck; bring a comps-based counter.
• Climate carrying-cost: severe wind risk, 80% chance of damaging wind over 30y; extreme-heat days projected 7→22/yr by 2055 (HVAC capex compounding) — expect insurance premiums to compound above CPI over the hold.
• Cap rate 9.6% vs local median 3.8% in San Antonio — top-decile yield for the area; either an underpriced asset or a hidden risk that comps aren't pricing in. Stress-test before assuming the spread holds.
• This rent runs 32% of the median local income ($55k/yr) — at the standard rent-burdened threshold; future hikes will face affordability resistance.

Questions for listing agent

• Built in 1908 — when were the roof, HVAC, electrical panel, plumbing, and water heater last replaced?
• Property tax is high relative to price — has the assessment been appealed recently, and will the sale trigger a re-assessment?
• Is there a deadline driving the sale (1031 exchange, divorce, estate, relocation)? That informs how much negotiation room exists.
• Crime grade is F in this area — have there been break-ins, vandalism, or insurance claims at this property in the last 3 years? What carrier currently insures it and at what premium?
• What's the average days-on-market for RENTAL listings here right now (not sales)? A rising rental-DOM trend means longer vacancies and softer asking-rent achievability than the comps imply.
• What's the recent tenant-quality profile in this submarket — average credit score on applications, eviction rate, late-payment / NSF rate, and stable-employment percentage? A property-management company in the area should have these aggregated.
• How much new for-sale + rental construction is in the pipeline within 1–3 miles? Heavy new supply typically softens prices + rents 12–24 months out; constrained supply supports both.