A Life-Changing Remodel Awaits

Transforming Spaces

Our Key Services

We specialize in creating beautiful and functional spaces for your home. Our team takes pride in delivering exceptional service, whether it’s a full remodel, a new accessory dwelling unit (ADU), or helping re-hang that stubborn door. Let us help you bring your vision to life!

Full Home Remodels

Revitalize your entire home with our full remodeling services. We’ll work with you from design to completion, making every detail truly yours.

Design & Build

Discover the potential of your property with our accessory dwelling unit services. We’re here to create a functional space that fits your needs.

To-Do List Crushing

Craftsmanship you can trust. No job is too small - it’s the little details that make your home feel complete. Squeaky flooring? Tight door? We can fix that!

Take a look at our latest projects!

We specialize in transforming homes with creativity and care.
Each project reflects our commitment to quality.

Explore our craftsmanship.

From concept to completion, we work closely with you to manifest your vision into reality.

See the difference for yourself!

Each completed project showcases our dedication to excellence and attention to detail.

What Our Clients Say

"I would definitely recommend Gallagher Construction. I look forward to doing additional projects with them in the future. His selection of subcontractors was top notch, I would use any of them for another project. They were all very professional and shared his eye for quality and detail."

ABHomeowner, Redmond

"Our project went very well once again. On-time and on-budget. Sean, was excellent (once again). He is easy to work with and his construction knowledge & organization is the best I have seen."

LTMercer Island

"The project was great. Sean Gallagher has excellent design sensibilities, solid project management skills and a fantastic crew of hard working, diligent and talented contractors. They did a beautiful job and handled every bump, question, change and request with grace and care. I especially appreciate that they talked us out of silly ideas that would have looked bad and cost more. They are extremely customer-service focused and really care about making sure you love the job 100%. Other perks were having the best dust control/floor protection system I've ever seen and daily site clean up. I did not find a single stray nail or staple!"

MWBellevue

"I am positively ecstatic about the quality of installation. Jim and Tyler did a terrific job, and Jim has been a pleasure to work with. He listens, has good ideas, pays attention, is safety-minded, and doesn't miss any details when passing along my requests to Tyler. And I'm very pleased to have this installation finished well before my deadline."

BHSammamish

"These guys were great! They were very professional and oversaw the project all the way through to completion. The project manager, Adam, was very good and his experience throughout the project impressive. The most important thing to him was making sure it was right for us and he did just that. We will use these guys again for sure."

CSBellevue

ABHomeowner, Redmond

"Our project went very well once again. On-time and on-budget. Sean, was excellent (once again). He is easy to work with and his construction knowledge & organization is the best I have seen."

LTMercer Island

"The project was great. Both Sean and Adam have excellent design sensibilities, solid project management skills and a fantastic crew of hard working, diligent and talented contractors. They did a beautiful job and handled every bump, question, change and request with grace and care. I especially appreciate that they talked us out of silly ideas that would have looked bad and cost more. They are extremely customer-service focused and really care about making sure you love the job 100%. Other perks were having the best dust control/floor protection system I've ever seen and daily site clean up. I did not find a single stray nail or staple!"

MWBellevue

"I am positively ecstatic about the quality of installation. Gallagher Construction did a terrific job, and has been a pleasure to work with. They listen, have good ideas, pay attention, are safety-minded, and doesn't miss any details. I'm very pleased to have this installation finished well before my deadline."

BHSammamish

"These guys were great! They were very professional and oversaw the project all the way through to completion. The project management was very good and conveyed experience throughout the project. The most important thing to Sean was making sure it was right for us and he did just that. We will use these guys again for sure."

CSBellevue