Jam Masonry

Concrete and masonry contractor in East Grand Forks, MN 56721

Call (218) 779-4555 jam-construction.com Directions

About this company

Jam Masonry is listed as a concrete and masonry contractor at 1722 5th Ave NW in East Grand Forks, Minnesota, in Polk County. It is one of 3 concrete and masonry companies in ZIP 56721.

Moderate market, crowded fieldArea profitability for concrete and masonry in ZIP 56721

Housing demand30

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

Customer spending power61

Household income and home values

Room for another company15

More crowded than 85% of US ZIPs

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

County context

One of 5 concrete and masonry companies in Polk County, MN.

37 general contractors in Polk County, MN.

All 75 construction companies in Polk County, MN.

ZIP 56721 at a glance

Population: 10,679 (21 per sq mi)
Median age: 36
Households: Median income $82,525 · 40% earn six figures
Housing: 72% owner-occupied
Workforce: 71% labor-force participation · 3.2% unemployment

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

Housing market around ZIP 56721

Figures describe the local area, not this company.

Typical home value$297,000+6.1% past year · +39% in 10 years

12-month value outlook+3.3%

Days to sale agreement17Grand Forks metro · 16 a year ago

New homes permitted, 202542Polk County

Listings with a price cut23.0%Grand Forks metro

Sale price vs list98.7%Grand Forks metro

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: Polk County permitted 42 new homes in 2025. 19% of the homes in this ZIP were built since 2000.

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