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Welcome To
Rock Springs Development

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Who We Are

Rock Springs Development was founded by Derek Nelson and Seth Mandell in 2013. The collective experience of over 25 years in the construction industry allows RSD to provide a truly unique home building experience.  As Denver's boutique custom builder, RSD focuses on thoughtful details and simple quality.

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What sets Rock Springs Development apart is that our team makes sure that the work we deliver is absolutely custom and absolutely flawless. After all, our superior quality and attention to detail are precisely why you hire us.

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Renovations and Custom Homes

We understand the meaning of home and the importance of every little detail. It is our top priority to work closely with our clients to execute a high quality, streamlined construction process. We focus on the details to ensure every aspect of the project is executed efficiently, thoughtfully, and in line with our clients’ dreams.



Space Reimagined

​As part of our objective to provide our clients with the most comprehensive and well-integrated building solutions, we work closely with our in-house designer. With experience on projects of all sizes – from one-room renovations to restaurant build-outs – our designer is well equipped to help our clients through all phases of construction.


Property Acquisitions &

Find Your Dream

Within the booming housing market of the Denver metro area, we bring expertise and knowledge of the region, enabling us to focus on the identification, acquisition, and revitalization of undervalued properties. We recognize the unique assets of each neighborhood throughout Denver and
add value through our integrated and high-quality construction.

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Stuart St

State of the art three-unit townhouse in the booming West Fax neighborhood. Reserve your unit now.

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Bannock St

A modern luxury duplex development coming soon. Enquire for more details.

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Franklin St

Elevated custom home with exceptional finishes and attention to detail coming to the University neighborhood.

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Contact Us

191 University Blvd #127
Denver, CO 80206


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