Accessory Structures in Manchester, NH (2026)
1 verified accessory structures rules for Manchester, New Hampshire, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Manchester requires a detached accessory dwelling unit to tie into the sewer service that already runs to the main house, not to run its own separate line to the public main. The connection must sit downstream from where that service exits the primary dwelling, and the owner must file a new sewer connection permit application under City Code § 52.122.
Manchester Detached ADU Sewer Connection Rule
Some RestrictionsManchester, NH Code of Ordinances § 52.122
A separate and independent building connection shall be provided for every building except that, when two or more buildings are so situated that a separate and independent building connection for each building would involve practical difficulties and impose unnecessary hardships, the Public Works Director may authorize the connection of such buildings to the public sewer through a single buildi...