It is very important that address numbers are easily seen from the street to assist emergency personnel in quickly locating the appropriate address. Reflective numbers are best for night time visibility.
Apartments: Complex address numbers should be at least six inches in height, contrast with the background, and be visible from the street. Post apartment numbers conspicuously, contrasting with background, and at least three inches in height.
Home owners: Make sure your address is clearly readable at night, 100 feet or more from either direction, by vehicles traveling on main roadway. If you don't have time, tools or skills to improve your address visibility yourself, you can contact your local fire department for assistance or have a local sign company make up a clearly visible address marker for mounting near the roadway.
Safety Home Address - is one company located in Whatcom County that specializes in manufacturing and installing reflective address markers for all locations.