| 1 | Public Works Department | #2503 | |
| 2 | Civil Engineering Section | #2600、#2601、#2603 | 376440000a1321@hchg.gov.tw |
| 3 | Maintenance Section | #2560、#2561、#2562 | 376440000a1322@hchg.gov.tw |
| 4 | Sewage Section | #2620、#2621、#2622 | 376440000a1323@hchg.gov.tw |
| 5 | Building Administration Section | #2530、#2531、#2532 | 376440000a1325@hchg.gov.tw |
| 6 | Engineering Section | #2650、#2652、#2653 | 376440000a1326@hchg.gov.tw |
| 7 | Building Permit and Inspection Section | #6350、#6351、#6352 | 376440000a1327@hchg.gov.tw |
| 8 | Water Resources Section | #6310、#6311、#6312 | 376440000a1328@hchg.gov.tw |