In 1990, the Columbia Shuswap Regional District contracted with UMA Engineering Ltd, an Engineering Firm that had developed house-numbering systems for several other Regional Districts, to establish a house numbering system for the Electoral Areas of the CSRD. With the exception of Area 'A', the house numbering system devised by UMA for the CSRD uses a grid system as its point of reference. With the grid system, the point of reference is defined by the use of two base lines, one that runs east-west, and the other running north-south. Where these base lines intersect, the zero point is established, and from this point grid lines are drawn. The CSRD combines the grid system of allocating a house number, with the name of the road that provides access to the property. In this way the house number is assigned according to the access for the property and the location of the property within the grid framework. House numbers are assigned only to dwellings and places of business, and not to vacant land.

Residents of the CSRD who have purchased a home that does not have a house number should contact the CSRD office to confirm the correct number for their dwelling, or to have a number assigned if one has not been issued. Residents in the process of building a new dwelling should also contact the CSRD to obtain a house number, as agencies such as Hydro, Telephone and Gas will require this service address prior to allowing a connection.

With the implementation of 9-1-1 in April of 2000, having correct house numbers posted has become extremely important. As these numbers are vitally important to emergency service personnel, people are requested to post their house numbers in a manner that makes them clearly visible from their access road both during the day and at night. The CSRD suggests the numbers be 8 to 10 centimetres high.