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Welcome To
Rock Springs Development


Who We Are

Rock Springs Development was founded in 2013 by Derek Nelson and Seth Mandell, two experienced builders with a passion for creating beautiful and functional spaces. With a focus on sustainable and innovative design, RSD offers a truly unique home-building experience. Our core values of integrity, transparency and customer service are at the heart of everything we do. As Denver's premier boutique custom builder, Rock Springs Development specializes in new construction, renovations, and additions. RSD combines over 25 years of experience with cutting-edge technology to create thoughtful, high-quality homes that exceed our client's expectations.

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At Rock Springs Development, we specialize in delivering custom home building and renovation services that are designed to exceed our client's expectations. Whether you are looking to build a new custom home, undertake a large-scale renovation, or buy and sell property, we have the expertise and resources to help you achieve your goals. Our team of experienced designers and builders will work closely with each client to create a truly unique design that fits their vision and budget. We use the latest construction techniques and materials to ensure that every project is of the highest quality. At Rock Springs Development, we are dedicated to delivering the finest craftsmanship, attention to detail, and exceptional service to every client.


Renovations and New Custom Homes

At Rock Springs Development, we know that building a home is a deeply personal process. That's why we work closely with each of our clients to ensure that every detail is executed to perfection. Our team of experienced designers and builders is committed to delivering a high-quality, streamlined construction process that meets our client's exact specifications. From the initial design phase to the final walk-through, we focus on the details to ensure that every aspect of the project is executed efficiently, thoughtfully, and in line with our client's dreams. With a deep understanding of the meaning of home, we are dedicated to delivering the finest craftsmanship, attention to detail, and exceptional service to every client.



Space Reimagined

At Rock Springs Development, we ensure that the designer works closely with our clients and the construction team to create custom building solutions that are well-integrated and comprehensive. With experience on projects of all sizes, our designers are equipped to help clients through all phases of construction, from one-room renovations to large-scale build-outs. We are dedicated to delivering a unique and seamless building experience, with a focus on quality, attention to detail, and exceptional service.


Property Acquisitions &

Find Your Dream

Rock Springs Development brings expertise and knowledge of the Denver housing market to identify, acquire, and revitalize undervalued properties. We add value through high-quality construction and a deep understanding of each neighborhood's unique assets. Whether buying or selling, we are committed to delivering exceptional service, quality craftsmanship, and attention to detail.



Your Dream

Ready to make your dream home a reality? Our team has a track record of building exceptional custom homes that exceed our clients' expectations. Whether you have a clear vision or need help bringing your dream to life, we are here to help.

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Bannock St

Experience modern luxury living in Englewood! Our duplex development is coming soon and each unit will feature sleek and contemporary finishes, open-concept living spaces, and a prime location with easy access to all the best the city has to offer. Inquire now for more details

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Franklin St

Discover elevated luxury living in the highly sought-after University of Denver neighborhood! Our custom single-family home offers exceptional finishes and attention to detail, designed to meet the needs of the most discerning buyer. Don't miss out on this rare opportunity to own a truly exceptional home. Contact us now for more details.


Photo Credits: HQ Architects, MOD, Hamman Studio, Echo Atilier, RE Colorado, Redfin

Contact Us

191 University Blvd #127
Denver, CO 80206


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