From Wazeopedia
Added section about new roads
House numbers are points on the map and can be adjusted at a fine level of detail to ensure Wazers are properly directed to the correct location for that address. It is therefore important to pay attention to all details regarding house numbers to ensure proper routing.
==New roads must have House Numbers added==
Waze will not be doing any future imports or merges of external data for house numbers. It is therefore very important that any new roads you add must have house numbers added in order for Waze to provide accurate routing to those addresses.