There were 12 construction businesses in ZIP code 03109 that employed between five and nine people in 2017, according to County Business Patterns (CBP) statistics provided by the United States Census Bureau.
CBP data indicates that no other industry had more establishments with between five and nine employees in ZIP code 03109 than construction businesses.
The following table shows industries of total establishments with between five and nine employees in ZIP code 03109 in 2017.
| Industry | Total Establishments |
|---|---|
| Construction businesses | 12 |
| Wholesale trade businesses | 8 |
| Professional, scientific and technical services businesses | 6 |
| Retail trade businesses | 4 |
| Administrative, support, waste management and remediation services businesses | 4 |
| Accommodation and food services businesses | 4 |
| Information businesses | 3 |
| Health care and social assistance businesses | 3 |








