Markool Heating & Cooling
HVAC contractor in Frederick, MD 21703
About this company
Markool Heating & Cooling is listed as an HVAC contractor at 5110 Jefferson Pike in Frederick, Maryland, in Frederick County. It is one of 7 HVAC companies in ZIP 21703.
Other HVAC companies nearby
Woodlawn Mechanical Contractors4880 Winchester Blvd, Frederick
1.9 mi(301) 948-9141
Mason Mechanical Services LLC4538 Timbery Dr, Jefferson
2.0 mi(571) 233-2585
ACR Services4014 Mountville Rd, Jefferson
2.4 mi(301) 620-9400
Real Comfort Systems Heating and Cooling3886 Roundtree Rd Unit 1, Jefferson
2.7 mi(301) 662-3661
Bob Wright's Service4806 Old National Pike, Frederick
3.3 mi(301) 698-0272
Housing market around ZIP 21703
Figures describe the local area, not this company.
Typical home value$410,000−1.3% past year · +56% in 10 years
Typical rent$2,296+2.4% past year
12-month value outlook+0.2%Roughly flat
New homes permitted, 20251,168Frederick County
Days to sale agreement19Washington metro · 17 a year ago
Listings with a price cut29.4%Washington metro
Sale price vs list99.7%Washington metro
New construction sales489Washington metro, Aug · −24% 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: Frederick County permitted 1,168 new homes in 2025, including 354 apartment units. 35% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.