Business Details
21 Years
experience
Custom Homes & Remodeling in Mercer Island, WA
Since 2005, Gallagher has established itself as a premier custom home builder and construction services provider in Mercer Island and the surrounding Pacific Northwest communities. Founded by Tom Gallagher and his wife Leanne, the company began as a small residential remodeling business and has grown to a team of over 20 professionals with expertise in luxury custom homes, high-end remodels, commercial construction, and outdoor living spaces. Our commitment to quality craftsmanship, sustainable design, and client collaboration has earned us recognition as one of the Puget Sound Business Journal's Fastest Growing Companies for three consecutive years. With decades of combined experience, our team of certified construction managers, project executives, and skilled tradespeople prioritizes transparency, attention to detail, and personalized service on every project.We maintain long-standing relationships with architects, subcontractors, and designers to deliver exceptional results that align with client visions and budgets. Our in-house design division ensures cohesive execution of modern elegance with functional living spaces tailored to each property's unique characteristics. Whether constructing waterfront estates or renovating urban lofts, we apply the same rigorous standards that have defined our 20-year reputation in residential and commercial construction.
Services
Custom Homes
Remodels
Outdoor Living
Commercial Projects
Waterfront Construction
Details
- Year established: 2005
Highlights and features
- 35+ years of combined leadership experience in commercial and residential construction
- In-house design team ensures cohesive aesthetic and functional outcomes
- Recognized three consecutive years as Fastest Growing Company by Puget Sound Business Journal
- Team of 20+ skilled professionals with specialized expertise in waterfront construction
- Proven four-step construction process with transparent budget management
What people say
Luxury oasis
Superior quality
Outstanding work
Creative solutions
Professional teams
Services
Custom Homes
Gallagher specializes in creating bespoke luxury residences tailored to clients' unique needs. Our custom homes combine premium materials with innovative design principles to maximize functionality and aesthetic appeal. With over two decades of experience in Mercer Island's distinctive waterfront environments, we ensure every home integrates seamlessly with its surroundings while maintaining modern elegance.
Luxury Remodels
Our remodeling services transform existing spaces into modern, functional living areas without compromising structural integrity. Specializing in kitchen and bathroom renovations, we use high-end finishes and advanced technology to enhance property value. The process maintains careful budget management while delivering hotel-quality luxury upgrades to existing homes across the Puget Sound region.
Commercial Construction
Gallagher's commercial division creates durable, aesthetically appealing business spaces designed for long-term functionality. From tenant improvements to new commercial developments, we execute projects with attention to zoning regulations and business operational needs. Our commercial projects maintain the same craftsmanship standards as residential work while addressing commercial clients' specialized requirements.
Outdoor Living
Our outdoor living solutions create functional waterfront retreats and entertainment spaces tailored to Pacific Northwest climates. Services include custom pool installations, weather-resistant decking, and heated patio areas that extend seasonal usability. Each outdoor project integrates with the home's architecture while prioritizing low-maintenance materials suited for waterfront environments.
Waterfront Construction
Specializing in challenging waterfront environments, we build and renovate homes that withstand demanding coastal conditions while maximizing scenic opportunities. Our expertise includes dock construction, erosion-resistant foundations, and climate-adapted materials. With extensive experience in Mercer Island's unique lakeside settings, we ensure both structural integrity and aesthetic harmony with natural surroundings.
People
Tom Gallagher
Owner
With 35+ years in construction, Tom founded Gallagher in 2005 after leading commercial projects across multiple industries. His expertise in high-rise residential and complex waterfront builds drives the company's commitment to quality and innovation.
Leanne Gallagher
Founder, Design Lead
University of Washington graduate with 35+ years in construction management. Leanne established Gallagher Design, developing the signature style that combines modern elegance with functional living spaces across hundreds of Pacific Northwest projects.
Jay Nygaard
Senior Project Manager
22-year construction veteran specializing in high-end residential projects. Certified in Industrial Engineering from UW, Jay ensures technical precision on custom homes while maintaining aesthetic standards through collaborative architect relationships.
Dave Kessler
Project Executive
UW Construction Management graduate with dual expertise in commercial construction and real estate development. Brings 15+ years of project leadership experience to expand Gallagher's commercial division capabilities.
John Kaelin
Senior Superintendent
40-year construction veteran specializing in complex waterfront projects. As Gallagher's longest-serving superintendent, he oversees quality control with a focus on client communication and project completion excellence.
Questions
What types of construction projects does Gallagher Co. specialize in?
We primarily build custom luxury homes, undertake high-end remodels, construct commercial buildings, and design outdoor living spaces throughout the Pacific Northwest region.
Can Gallagher Co. handle both design and construction phases?
Yes, our in-house design division integrates with construction teams to ensure cohesive project execution from concept through completion while maintaining budget and timeline.
What areas does Gallagher Co. serve?
We work primarily in Mercer Island, Seattle, and throughout the Puget Sound region including waterfront communities across Western Washington.
Does Gallagher Co. offer financing options for construction projects?
While we don't provide direct financing, our team partners with regional lenders to connect clients with suitable construction loan options for their home building needs.
How long does the typical construction process take?
Project timelines vary by scope: custom homes average 12-18 months, major remodels 6-12 months, and commercial projects 18-24 months including design phases.
What warranty or guarantees does Gallagher Co. provide?
We offer a 2-year workmanship warranty on all projects, with extended coverage for major structural components through our trusted subcontractor network.
