Adding new address to Google Maps?
Sign up for and use Google Mapmaker https://mapmaker.google.com/mapmaker
To Add an address:
- Click Add New and select Add a Place from the drop-down menu.
- Zoom in and drop the marker at the exact location.
- Select the category Address from the drop-down menu.
- Enter the address in the left panel.
- Click Save to finish.
Following the link above reports that:
Google Map Maker has closed
Google Map Maker officially closed on March 31, 2017, and many of its features are being integrated into Google Maps.