About
Gallagher Co. is Mercer Island’s premier luxury home builder, known for delivering timeless custom homes, high-end remodels, luxury outdoor spaces, and complex commercial spaces with unmatched precision. We bring the personal touch of a small firm combined with deep expertise in both residential and commercial construction. Our team operates with proven systems, clear communication, and a relentless focus on craftsmanship, ensuring every detail is done right the first time. From custom estates to outdoor living spaces, Gallagher Co. builds enduring quality that stands the test of time. We are proud to serve Mercer Island and the surrounding area.
