All Air Systems
HVAC contractor in Parkton, MD 21120
About this company
All Air Systems is listed as an HVAC contractor at 18 Lauriann Ct in Parkton, Maryland, in Baltimore County. It is one of 3 HVAC companies in ZIP 21120.
Other HVAC companies nearby
Pride Mechanical18 Lauriann Ct, Parkton
Under 0.1 mi(410) 874-0100
MTS Plumbing & Heating20030 Cameron Mill Rd, Parkton
2.4 mi(410) 329-6066
Standard Heating & Air Conditioning Contractors16 Jordan Mill Ct, White Hall
4.2 mi(410) 357-5010
Tomco Plumbing5 Teresa Marie Ct, Manchester
6.7 mi(410) 374-9226
Cooper HVAC8 Lynn Ridge Ct, Manchester
7.8 mi(410) 339-8030
Housing market around ZIP 21120
Figures describe the local area, not this company.
Typical home value$642,000+2.1% past year · +50% in 10 years
12-month value outlook+0.6%Roughly flat
Days to sale agreement16Baltimore metro · 14 a year ago
New homes permitted, 20251,531Baltimore County
Listings with a price cut30.2%Baltimore metro
Sale price vs list100.1%Baltimore metro
New construction sales122Baltimore metro, Aug · −37% 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: Baltimore County permitted 1,531 new homes in 2025, including 379 apartment units. 21% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.