Trilogy AC
HVAC contractor in Round Rock, TX 78681
About this company
Trilogy AC is listed as an HVAC contractor at 1 Chisholm Trl Ste 450 in Round Rock, Texas, in Williamson County. It is one of 5 HVAC companies in ZIP 78681.
Other HVAC companies nearby
PT Maintenance402 W Palm Valley Blvd, Round Rock
0.3 mi(512) 673-8705
S OS Mechanical1302 W Industrial Blvd Ste B, Round Rock
0.5 mi(512) 238-6699
AC by Chris1000 Heritage Center Cir Ste 530, Round Rock
0.7 mi(512) 248-2665
Jolly Brothers Services551 S I35 Frontage Rd Ste 373, Round Rock
0.7 mi(512) 616-1811
Aire Serv of Round Rock600 S Interstate 35 Frontage Rd, Round Rock
0.8 mi(512) 843-0561
Housing market around ZIP 78681
Figures describe the local area, not this company.
Typical home value$473,000−2.9% past year · +60% in 10 years
Typical rent$1,771+0.6% past year
12-month value outlook−2.2%
New homes permitted, 20254,956Williamson County
Days to sale agreement60Austin metro · 67 a year ago
Listings with a price cut30.1%Austin metro
Sale price vs list97.3%Austin metro
New construction sales890Austin metro, Aug · +5% from last year
Source: Zillow (home values, rent, outlook and metro sales), data through Sep 2026. Permits: U.S. Census Bureau.
Typical home value, last 10 years
Source: Zillow Home Value Index, Sep 2026.
Local building angle: Williamson County permitted 4,956 new homes in 2025, including 996 apartment units. 46% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.