Founded in 1998 by Keira Harkin, Old Town Design Build is a woman-owned custom home builder and design-build firm based in Fort Collins, Colorado. We serve homeowners throughout Northern Colorado, specializing in high-end custom homes, luxury full-home remodels, historic renovations, luxury ADUs and carriage houses, and high-performance Passive House construction. Every project is guided by a commitment to quality craftsmanship, sustainable building practices, and transparent communication.

As a licensed general contractor with decades of experience, our team blends architectural design, construction expertise, and interior design under one roof, making the design-build process seamless and stress-free. From preserving the character of Old Town’s historic homes to building new modern, energy-efficient residences, we focus on creating spaces that reflect our clients’ lifestyles while reducing environmental impact.

By challenging the traditional model of homebuilding, Old Town Design Build has earned a reputation as one of Fort Collins’ leading luxury custom home builders and large scale remodeler, valued for Passive‑house & energy‑efficient design expertise.