Town Hall Address 93 Highland Avenue Somerville, MA 02143 United States- Middlesex County Website http://www.somervillema.gov/ Town Clerk 617-625-6600 http://www.somervillema.gov/cityclerk United States Assessor 617-625-6600 3100 https://www.somervillema.gov/departments/finance/assessing Monday - Wednesday 8:30 a.m. - 4:30 p.m. Thursday 8:30 a.m. - 7:30 p.m.Friday 8:30 a.m. - 12:30 p.m. 93 Highland Ave. Somerville, United States Tax Collector 617-625-6600 3500 Monday - Wednesday 8:30 a.m. - 4:30 p.m. Thursday 8:30 a.m. - 7:30 p.m.Friday 8:30 a.m. - 12:30 p.m. 93 Highland Ave. Somerville, United States Fire District 617-623-1700 United States Water 617-625-6600 United States Town Hall Hours Monday - Wednesday 8:30 a.m. - 4:30 p.m. Thursday 8:30 a.m. - 7:30 p.m.Friday 8:30 a.m. - 12:30 p.m. County Middlesex