What percentage of the real property value is a utility easement worth?
This really is not a legal question. As with any property, it is worth whatever a buyer is willing to pay and a seller is willing to accept. I recommend you discuss this with an appraiser or at least a knowledgeable real estate agent. I also recommend considering negotiating having the utility company pay to get an appraisal done to determine the value. PLEASE BE ADVISED: This answer and any information contained herein is not intended to be treated, and should not be construed, as legal advice. Rather, this answer is offered solely for general information purposes. This answer does not create an attorney-client relationship, nor does it create any kind of legal relationship, duty, or privilege. This attorney is licensed only in Washington.