| Business | Phone |
| Building Dept 99 Lafayette Rd, Seabrook 3874 | (603) 474-3871 |
| Seabrook Beach Village Dist 210 Ocean Blvd, Seabrook 3874 | (603) 474-7029 |
| Seabrook Selectmen 99 Lafayette Rd, Seabrook 3874 | (603) 474-3311 |
| Seabrook Sewer Dept 99 Lafayette Rd, Seabrook 3874 | (603) 474-8030 |
| Seabrook Town Dump 70 Rocks Rd, Seabrook 3874 | (603) 474-9765 |