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About Us

We Build for People

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21 Electric LLC

21 Electric is a full-service electrical contractor specializing in industrial, commercial, and residential projects.

 

With a team of highly skilled electricians, including MSHA-certified professionals, we support demanding industries such as mining, aggregate, and energy with 24/7 service and rapid response capabilities. Our expertise spans custom panel building, new construction, maintenance, and troubleshooting, allowing us to deliver reliable, high-quality solutions across every phase of a project.

 

From custom homes to large-scale plant construction, we are committed to safety, efficiency, and keeping our customers powered and productive.

Relationships

We strive to build lasting relationships with every customer and build a community of individuals working together to achieve the impossible for years to come. At 21 Electric we believe strongly in supporting the communities that support us.

Experience

Our skilled technicians across the company come from all industries and backgrounds, some bringing more than 40 years of experience and expertise to your door. 

Accountability

Our team holds professionalism, creativity, and reliability to the upmost standard in everyday life. On and off the job everyone is proud to be a part of something bigger. 

Our Mission

Power You Can Count On.

At 21 Electric, our mission is to deliver safe, reliable, and high-quality electrical solutions that keep our customers operating at their best.

 

We are committed to excellence in every project—from residential to large-scale industrial—through skilled workmanship, responsive service, and a strong focus on safety and integrity.

 

Our goal is to build lasting partnerships by consistently powering productivity and earning trust.

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Head Office

914 South Summit Ave 

Newcastle, WY 82701

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48 Government Valley Rd

 Sundance, WY 82729

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11953 Pleasant Valley Rd. 

Custer, SD 57730

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1220 Creek Drive

Rapid City, SD 57703

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808 E. 6th Street

Gillette, WY 82716

Inquiries

For any inquiries, questions or commendations, please call: 307-746-9788

605-673-2087

Custer Direct Line

© 2026 By 21 Electric LLC, All rights reserved.

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