Certified Maintenance Company Inc

Excavation contractor in Huntingtown, MD 20639

About this company

Certified Maintenance Company Inc is listed as an excavation contractor based in Huntingtown, Maryland, in Calvert County. Federal motor carrier records list 6 drivers and 1 trucks for the company. It is one of 2 excavation and demolition companies in ZIP 20639.

Fleet size

Drivers6

Trucks1

Last federal filing: Sep 2005. Source: FMCSA.

Strong market, crowded fieldArea profitability for excavation and demolition in ZIP 20639

Housing demand76

Sales pace, new listings and new construction. Source: Zillow

Customer spending power93

Household income and home values

Room for another company21

More crowded than 79% of US ZIPs

Scored against every US ZIP. An index of local conditions, not this company's results.

County context

One of 8 excavation and demolition companies in Calvert County, MD.

114 general contractors in Calvert County, MD.

All 224 construction companies in Calvert County, MD.

ZIP 20639 at a glance

Population: 15,544 (144 per sq mi)
Median age: 41
Households: Median income $161,422 · 74% earn six figures
Housing: 93% owner-occupied
Workforce: 64% labor-force participation · 2.1% unemployment

ZIP figures are US Census estimates for the ZIP area, not the company.

Housing market around ZIP 20639

Figures describe the local area, not this company.

Typical home value$617,000+1.2% past year · +44% in 10 years

12-month value outlook+0.5%Roughly flat

Days to sale agreement19Washington metro · 17 a year ago

New homes permitted, 2025157Calvert 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.

Typical home value, last 10 years

Source: Zillow Home Value Index, Sep 2026.

Local building angle: Calvert County permitted 157 new homes in 2025, including 35 apartment units. 26% of the homes in this ZIP were built since 2000.

Local figures are estimates from public records and Zillow housing data, updated regularly.