Is Port Isabel, TX 78578 a buyer’s or seller’s market?
Port Isabel is a buyer’s market. With about 8.2 months of supply, buyers usually have more time and more room to negotiate on price and terms.
More competitive than 0% of U.S. ZIP codes, and #856 of 868 in the state.
Based on share sold above original list, sale-to-list ratio, months of supply and days on market for the 3 months ending August 31, 2026. See the breakdown
The Port Isabel housing market right now
In the three months ending August 31, 2026, 0% of homes in Port Isabel, TX 78578 sold above their list price, the typical home went under contract in 124 days and there were 8.2 months of supply. Six or more months of supply favors buyers, who usually have more time and more room to negotiate. That’s based on 60 home sales.
Compared with the same period a year earlier, the share selling over asking was about the same (2% then), homes sold faster (148 days then) and the median sale price rose 14% to $344,851. Overall, Port Isabel is more competitive than a year ago, so tougher for buyers.
Within Cameron County, homes here sell more slowly than in 92% of the county’s ZIP codes, and sell less often over asking than in any other ZIP code in the county. On our competition score, Port Isabel ranks #856 of 868 TX ZIP codes with enough sales (score 3 out of 100).
Nearby, La Feria 78559 (9% sold over asking) and Harlingen 78550 (2% sold over asking) are even more competitive.
Run the numbers for 78578
Nearby markets
Brownsville 78520Balanced $161 /sq ftBrownsville 78521Buyer’s market $165 /sq ftBrownsville 78526Balanced $171 /sq ftCombes 78535 — /sq ft Browse all markets →Questions about Port Isabel real estate
Is Port Isabel a buyer’s or seller’s market?
A buyer’s market: there were 8.2 months of supply in Port Isabel, TX 78578 in the three months ending August 31, 2026. Under three months usually favors sellers, and six or more favors buyers.
How fast do homes sell in Port Isabel?
The typical home went under contract in 124 days in the latest three months.
Do homes in Port Isabel sell over asking?
0% of homes sold above their original list price, and the typical sale closed at 95.1% of the list price.
What are property taxes in Port Isabel?
About 1.50% of a home’s value a year in Cameron County, or roughly $6,000 on a $400,000 home.
What is the median home price in Port Isabel?
The median sale price was $344,851 in the three months ending August 31, 2026, about $237 per square foot.
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Market data describes housing activity only. Figures are rolling 3-month values from Redfin and may be revised. Methodology