Based on the historical population data for ZIP code 94521 in Concord, California, the area has experienced steady population growth over the past decade. The population increased from 42,280 in 2010 to 43,990 in 2022, with a corresponding increase in population density from 2,211.3 people per square mile to 2,300.73 people per square mile over the same period.

Given the ZIP code's size of 19.12 square miles and its 2022 population density of 2,300.73 people per square mile, the area can be classified as suburban. Suburban areas typically feature a mix of residential types, including single-family homes and denser developments, with lot sizes ranging from 0.25 to 1 acre. The estimated number of housing units corresponding to the 2022 population is 16,854, assuming the national average household size of 2.61 persons per household.

The lifestyle in this suburban area is likely to be family-oriented, with good access to schools, parks, and shopping centers. The community life may be active, with residents participating in sports leagues, homeowners associations, and local festivals. The area strikes a balance between the openness of rural living and the amenities of urban life, making it an attractive option for families seeking a comfortable and convenient lifestyle.