You may be able to call the power company and get the high, low and average for any property in their market.
In Reno, NV Energy has a phone service that will give you last year's high, low and average bill and if you speak with an operator they will look up past years too.
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Earl Peterson
Stark & Associates
Commercial Real Estate
Office, Industrial,
Retail & Investment Properties
Reno, Sparks & Northern Nevada
www.starktcn.com