KNJ Construction LLC
General contractor in Mt Airy, MD 21771
About this company
KNJ Construction LLC is listed as a general contractor at 17005 Hardy Rd in Mt Airy, Maryland, in Frederick County. It is one of 70 general contractors in ZIP 21771.
Other construction companies nearby
Flooring Specialist Group LLC2100 Woodbine Rd, Woodbine
1.3 mi(301) 821-3468
Mast Construction, LLC1045 Long Corner Rd, Mount Airy
1.8 mi(240) 405-0763
Myers Mini Barns16041 Frederick Rd, Woodbine
1.9 mi(410) 489-5451
Ferraro Custom Builders1769 Florence Rd, Mt Airy
2.2 mi(410) 977-8903
Canyon Contracting2501 Back Acre Cir, Mt Airy
2.4 mi(301) 829-1900
Housing market around ZIP 21771
Figures describe the local area, not this company.
Typical home value$626,000+0.8% past year · +55% in 10 years
12-month value outlook+0.4%Roughly flat
Days to sale agreement16Baltimore metro · 14 a year ago
New homes permitted, 20251,168Frederick 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: Frederick County permitted 1,168 new homes in 2025, including 354 apartment units. 24% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.