Are there any standards or procedures to install drainage facilities in residential land?

In order to install drainage facilities in residential land, it must conform to the standards stipulated by laws and regulations.

For details, please refer to the "Yokohama City Drainage Equipment Handbook".

In that case, please submit the “Application for Confirmation of Drainage Equipment () Plan” to the Public Works Office of each ward.
We can download "Yokohama-shi drainage equipment handbook" from Yokohama-shi homepage.

In addition, when the Internet is not available, you can browse and copy the printed one at the Yokohama City Citizen Information Center (City Hall 3F).

Yokohama City Drainage Equipment Handbook
Plan confirmation of drainage facilities