| Business | Phone |
| Third Lake Village President 87 N Lake Ave, Grayslake 60030 | (847) 223-8422 |
| Grayslake Building Cmmssnr 10 Seymour Ave, Grayslake 60030 | (847) 223-2323 |
| Grayslake Building Comm 33 S Whitney St, Grayslake 60030 | (847) 223-2323 |
| Grayslake Building Dept 106 Hawley St, Grayslake 60030 | (847) 223-2323 |
| Grayslake Maintenance Dept 585 Berry Ave, Grayslake 60030 | (847) 223-8515 |
| Grayslake Village Clerk 10 Seymour Ave, Grayslake 60030 | (847) 223-8515 |
| Grayslake Village Clerk 33 S Whitney St, Grayslake 60030 | (847) 223-2515 |
| Hainesville Village Hall 100 N Hainesville Rd, Grayslake 60030 | (847) 223-2032 |