Published October 11, 2026 in Market Update

One part of SW Suburbs is moving fastest with the least supply

By Sally Scrimgeour

Real estate, SW Suburbs

CNBC reported the average 30-year fixed mortgage rate reached 7.49% as of October 11, 2026. Rates that high slow buyers down in most places. But in ZIP 55317, the Real Estate Data Aggregator counted just 1.2 months of supply for the three months ending August 31, 2026. That is the tightest supply of any ZIP code in SW Suburbs. Demand there did not flinch.

The Real Estate Data Aggregator shows that 50% of homes in ZIP 55317 went under contract within two weeks of listing. That is the highest quick-contract share in the market. Buyers there are deciding fast. If you are shopping in 55317, fewer choices can mean less time to think.

How ZIP 55317 compares with the rest of SW Suburbs

The Real Estate Data Aggregator counted 127 homes sold in ZIP 55317, up 13.4% from the same months of 2025. Homes for sale there fell 23.8% year over year, to just 48. More buyers, fewer homes. That is why supply is so tight.

Months of supply across SW Suburbs

ZIP 55315 sits at the other end, with 3.9 months of supply, according to the Real Estate Data Aggregator. That is up 0.9 months from a year ago. Only 24.2% of homes there went under contract within two weeks. Prices dipped a little too, down 2.5% year over year. Buyers in 55315 have more time and more choices.

How fast are homes going under contract?

ZIP 55347 actually led the market here. The Real Estate Data Aggregator shows 52.4% of homes there went under contract within two weeks, up 14.5 points from a year ago. Homes sold there rose 26.8% year over year. Supply fell to 1.9 months. It is not far behind 55317.

What about the wider picture?

Across all eight ZIP codes together, the Real Estate Data Aggregator counted 836 homes sold in the three months ending August 31, 2026. That is up 4.8% from the same months of 2025. Homes for sale across SW Suburbs fell 3.9% year over year, to 572. New listings rose 13%, yet supply still shrank. That tells you demand is absorbing new inventory quickly.

Nationally, Realtor.com reported that mortgage rates climbed above 7% for the first time since January 2025. Price cuts hit 20.8% of listings in September, the highest since October 2022, also per Realtor.com. SW Suburbs is not immune to that pressure. But tight supply in ZIPs like 55317 and 55347 means well-priced homes there are still moving quickly.

The Federal Housing Finance Agency reported U.S. house prices rose 2.6% from July 2025 to July 2026. SW Suburbs results are mixed around that. ZIP 55318 saw prices rise 21.8% year over year, per the Real Estate Data Aggregator. ZIP 55386 saw prices dip 14%. One market, very different streets.

One street can read very differently from the whole ZIP code. The numbers above cover broad areas. Your block, your home style and your price point all shape what actually happens when you list. I am happy to pull what the data shows for your specific address.