An overview of the general cost of living index for Mountlake Terrace, WA is displayed above for your reference. Residents in Mountlake Terrace, WA enjoy a cost of living index of 134. This index is 16% higher than the Washington average, and 34% higher than the national average. The following categories are used when determining the cost of living index for any given city: health care (5%), transportation (9%), utilities (10%), groceries (13%), housing (30%), and goods/services (33%). Clearly, housing and goods/services make up the majority of the formula for calculating the cost of living index. Because of this, the general cost of living for any given area can be estimated by looking at the cost of everyday goods in that area. For those living in Mountlake Terrace, WA, the average cost of goods and services is 28% higher than it is in Washington, and it is 36% higher than the national average.