Right Angle Contracting
We’re excited to hear your ideas for your next project. Let’s connect and make that vision a reality!
Monday - Friday 08:00am - 5:00pm

Saturday - By appointment only



Right Angle Contracting

5349 Newcombe Street Arvada, CO 80002


Call Us 720.837.3365

Right Angle Contracting LLC BBB Business Review

Dependable. Trustworthy. Honest. Transparent. Quality.

We approach each job as if we’re working on a project for ourselves

We get it.

You’re asking us to do work on your home. That’s a big responsibility and we don’t take it lightly.

Established in 2010, Right Angle Contracting brings more than 15 years of experience to each job we tackle. We not only have the experience, but we’re licensed and insured. This makes a huge difference when having a contractor in your home. You can rest assure knowing your renovation adheres to city code, and the dollars you’re investing are seen during resale. If you have a dream space, let’s chat and see how we can help!

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We appreciate the opportunity to bring the vision you have for your home to life. Our team of experts are looking forward to working with you on your next project.


Seth Dineen

Founder / Owner

At an early age, Seth discovered a passion for working with his hands by helping his parents with projects around the house. He added to his skillset from childhood when he started his own handyman business during his sophomore year in high school. As he gained more experience and established himself, smaller projects turned into larger remodels. After working as a project manager for a construction company focused on exterior remodels, he decided it was time to take his experience to the next level and became state licensed and started Right Angle Contracting in 2010. Seth thrives on working hard to exceed each client’s expectations and always stands behind his work.


Zak Zimmer

Carpenter / Project Manager

Zak brings an extensive amount of experience to Right Angle Contracting with 15 years in the construction industry, and works right alongside Seth on each project.


Jim Lamonski


With more than 25 years as a drywaller, Jim can match and blend any texture out there, even those DIY projects that didn’t quite work out.


Simon Sanchez

Drywall Crew

From custom basements to tract homes, Simon and crew have completed more than 20,000 projects in the Denver metro area.


Slava Stampher

Owner of S Star Electric

Slava has been in the electrical business for more than 10 years. He and his team work on both residential and commercial jobs. Troubleshooting and tedious thinking are what drives Slava and his team.


Bill Havens

Licensed Plumber and HVAC

Bill has 38 years of experience under his belt as a licensed plumber and HVAC technician. He’s continually adapting to the ever changing codes and latest product innovations.


Shawn Kennedy

Roofing Project Manager / Quality Control

Shawn is an expert when it comes to anything roof related, with more than 13 years experience. He has managed more than 5,000 projects and ensures it’s done right the first time.