20260306Schedule 51 Customer Notice (March 2026).pdf

Avista Corp. AAFFIST'a
P.O. Box 3727
1411 East Mission COM_ .
Spokane, Washington 99220-0500
Telephone [phone]
Toll Free 800-727-9170
April 6, 2026
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Dear Builder and/or Developer:
Avista Utilities is proud to have supplied your projects with natural gas and electric service, as well as
quality construction coordination, of your utility needs for many years. As you may know, in the spring
of each year, the Company files a request with the Idaho Public Utilities Commission ("Commission")
to update the costs associated with the materials required to provide our electric service for individual
homes and new developments.
The Company filed its proposed changes with the Commission on March 6, 2026, and if the requested
changes are approved, they would go into effect on May 15, 2026.
The changes include updating the standard or basic development costs and allowance to reflect actual
2025 material and labor costs. Below is a summary of the changes included in the filing:
Residential Developments
Present Proposed
Total Cost per Lot $ 3,849 $ 3,818
Less: Service Cost $ 516 $ 541
Developer Responsibility $ 3,333 $ 3,277
Developer Refundable Payment $ 2,545 $ 2,755
Builder Non Refundable Payment $ 1,304 $ 1,063
Allowance $ 2,545 $ 2,755
The proposed change in the cost per lot would require builders to make a $1,063 non-refundable
payment. Developers would only need to provide a letter of credit, or cash deposit, for$3,277 per
residence until such time as a permanent hookup is made.
The Company's applications are proposals, subject to public review and a Commission decision.
Copies of the applications are available for public review at the offices of both the Commission and
Avista, and on the Commission's website (www.puc.idaho.gov). Customers may file with the

Commission written comments related to the Company's filings. Customers may also subscribe to
the Commission's RSS feed(https://puc.idaho.gov/)to receive periodic updates via e-mail about the
case. Copies of rate filings are also available on our website, www.myavista.com/rates.
If you would like to submit comments on the proposed change, you can do so by going to the
Commission website or mailing comments to:
Idaho Public Utilities Commission
P.O. Box 83720
Boise, ID 83720-0074
If you have any questions or concerns, please feel free to contact your Avista Account Executive or
Customer Design Coordinator.
Sincerell
J �
Jamie Howard
Account Executive-Development Specialist
208-769-1871