About Us

Wolff House is a boutique development + design firm operating out of Denver, Colorado.

Our company was created out of a passion for design and a desire to consistently add value and beauty to the neighborhoods we work in. We believe in quality over quantity, and that each property we touch deserves to be given the critical time, attention, and planning indicative of a Wolff House.

Aaron Koski


My passion for design and love of architecture was only matched by my partner, Kassi, who had already taken a leap of faith in 2011 and was remodeling homes on her own accord. Sharing the same core values, we teamed up in 2013 to form our real estate investing company, Wolff House, and we have been remodeling and building homes ever since.

I’ve always had an entrepreneurial spirit and a strong desire to solve problems. I studied Mechanical Engineering at Colorado State University, which taught me how to rationally think through problems and create processes. I’ve been able to apply that same knowledge towards developing systems and implementing processes around daily business activities in order to ensure success.

In my free time I love spending time in the great Colorado outdoors whether it be mountain biking, skiing, backpacking, or simply enjoying the scenery.

Kassi Pelley


A steady fascination with all things related to architecture and interior design has been with me ever since I can remember, and I knew from a young age that I wanted a career that would allow me to work closely with homes.

I graduated from Colorado State University with a Bachelor’s degree in Business with an emphasis in Residential Real Estate. After being an active Real Estate Agent for a little over a year I realized I had a desire to do something more closely linked to home design, and so I jumped into the wonderful world of home restorations. I’ve realized just how much I love a good before and after, and that being a part of a home’s transformation from beginning to end, whether that be a remodel or ground-up construction, is my true passion. I love bringing a home to the market that has been built with a dedication to quality, and that has a design that gets Buyers excited.

I keep a close eye on design trends, while simultaneously studying classic homes, and am constantly indulging in endless sources of inspiration. I’m drawn to a mix of old and new, and I aim to create spaces that feel grounded and inviting, with warm contemporary features and finishes.