Union City's median sale price rose 2.7% to about $1.22 million in the three months through September 2026, but the typical home sold right at list price in about 25 days.
The numbers
- Median sale price: $1,216,920, up 2.7% year over year
- Price per square foot: about $666, down 15.9%
- Homes sold in September: 79, down from 83 a year earlier
- Median days on market: 25, versus 26 a year ago
- Sale-to-list ratio: 100.1%, about flat; 42.3% of homes sold above list
- Homes with price drops: 29.4%, down 1.3 points
What Zillow shows
Zillow's Home Value Index puts the typical Union City home at $1,195,668 as of Sept. 30, 2026, down 1.9% from a year earlier. Zillow says homes go pending in about 28 days.
What it means for buyers and sellers
Redfin rates Union City "very competitive" (Compete Score 79), with about three offers per home, but the average home sells at about list price and goes pending in around 30 days. The 15.9% drop in price per square foot alongside a higher median suggests larger single-family homes made up more of the summer's sales. Zillow's index is slightly down, so buyers have some room to negotiate. Compare with neighboring Fremont and Hayward.
Redfin figures cover the three months through September 2026 and compare with the same period a year earlier. Zillow's Home Value Index is a typical-home estimate, not a sale price, so the two numbers measure different things and won't match exactly.