Cornerstone Inc.
General contractor in Beallsville, MD 20839
About this company
Cornerstone Inc. is listed as a general contractor at 19715 Darnestown Rd in Beallsville, Maryland, in Montgomery County. It is one of 2 general contractors in ZIP 20839.
Other construction companies nearby
Rebecca Munster Designs, LLC20010 Fisher Ave Ste B, Poolesville
2.3 mi(240) 489-1001
Bupp Contracting & Remodeling LLC20611 Whites Ferry Rd, Poolesville
2.4 mi(240) 793-5175
Gold Potomac construction inc19835 Beatriz Ave, Poolesville
2.5 mi(240) 715-2798
Two Tyres Design17022 Hersperger Ln, Poolesville
3.1 mi(570) 815-3390
Beautiful Home Services18909 Fisher Ave, Poolesville
3.3 mi(888) 724-6810
Housing market around ZIP 20839
Figures describe the local area, not this company.
Typical home value$653,000−0.5% past year
12-month value outlook−0.1%Roughly flat
Days to sale agreement19Washington metro · 17 a year ago
New homes permitted, 20251,411Montgomery County
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.
Local building angle: Montgomery County permitted 1,411 new homes in 2025, including 559 apartment units. 0% of the homes in this ZIP were built since 2000.
Local figures are estimates from public records and Zillow housing data, updated regularly.