21646 Karpathos Ln is a single-family home in Spring (Harris County), 3 bedrooms, 2 bathrooms, 1,691 sq ft, built 2005, not currently listed for sale. Starting from the estimated home value of $252,700, the rent estimate is $1,920 a month ($1,790 to $2,050, from 15 nearby rentals). With 25% ($63,175) down at 7.92%, the monthly payment with taxes, insurance and HOA comes to $2,267, so the rent covers the monthly payment 0.84 times (DSCR 0.84) — under 1.0, so the rent does not cover the monthly payment. You would put in $678 a month after vacancy and reserves: a cash-on-cash return of -11.5% a year on about $70,756 to close.
The home is in a municipal utility district (MUD): BRIDGESTONE MUD adds 0.49% to the tax rate, and the county labels it a developing district whose rate can change. The seller's tax bill of $6,487 (2025) is lower than an investor's estimated $6,615 a year, because exemptions and caps do not transfer. Rents in Greater Houston have been flat, so the numbers assume 8% vacancy and no rent growth.
To reach DSCR 1.2 it would take a price of about $140,341 or a rent of about $2,721 a month. Before making an offer, ask a local leasing agent what homes like this one have actually leased for. These are estimates, not quotes.
Our standard write-up of this report’s numbers.