Haddon Heating and Cooling
HVAC contractor in Concord, CA 94520
About this company
Haddon Heating and Cooling is listed as an HVAC contractor at 135 Mason Circle Ste L in Concord, California, in Contra Costa County. It is one of 27 HVAC companies in ZIP 94520.
Other HVAC companies nearby
Mercury Heating and Air140 Mason Circle Ste C, Concord
Under 0.1 mi(925) 233-5555
Smart Air Experts125 Mason Cir Ste J, Concord
Under 0.1 mi(925) 446-6228
Mays Heating And Air125 Mason Circle Ste D, Concord
Under 0.1 mi(925) 237-0725
Matrix HG Inc115 Mason Cir, Concord
0.1 mi(925) 459-9200
Refreshed Heating and Cooling | East Bay HVAC Pros4070 Nelson Ave, Concord
0.3 mi(925) 755-4440
Housing market around ZIP 94520
Figures describe the local area, not this company.
Typical home value$601,000+0.7% past year · +52% in 10 years
Typical rent$2,401+3.9% past year
12-month value outlook+1.1%
New homes permitted, 20251,163Contra Costa County
Days to sale agreement16San Francisco metro · 22 a year ago
Listings with a price cut21.2%San Francisco metro
Sale price vs list106.1%San Francisco metro
New construction sales91San Francisco metro, Aug · −32% 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: Contra Costa County permitted 1,163 new homes in 2025, including 178 apartment units. 8% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.