Crafting Homes with Heart, Precision & PNW Grit
Based in King County and proudly serving the Greater Seattle area, Mammoth Construction specializes in complex residential projects—from custom hillside homes to transformative remodels and hand-crafted woodwork. With a proven track record and a commitment to doing things right the first time, we bring your vision to life with care, precision, and pride.
Flexible Financing Options
We understand the financial investment involved in home projects, which is why we offer flexible financing options to make your dream project a reality.
Complimentary On-Site Consultations
Our team offers free, no-obligation consultations at your home, where we can discuss your ideas, provide insights, and offer personalized solutions for your project.
Excellence Recognized with Awards
We take pride in our award-winning service, and our commitment to excellence has been recognized within the industry.
Fully Licensed & Insured
You can have peace of mind knowing that we are fully licensed and insured, prioritizing the safety and security of your home and project.
Why Choose Mammoth Construction & Woodworks
Words from Our Clients
Over the past twenty years, Derek has made numerous renovations to our homes - bathrooms, kitchen, stairwell, a spectacular two story deck with patio and then a major renovation to both units in our duplex. In every case, Derek understood perfectly what we wanted, converted his understanding into design ideas - modifying them depending upon our likes and budget - and made it happen. Derek's craftsmanship is superb - especially his finished wood working. There is always something beautiful integrated in the work. And during each project, Derek became an enjoyable part of our lives. Some of the larger projects took a bit longer than expected to complete - but the waiting was entirely worth it! We have always been more than happy with the result and came back to Derek time and time again.
We regret that we moved out of town before Ries came into the business. We knew Ries as a young boy hanging around and working with his dad. Now he is the owner of the business. Too bad that our house is now too long of a commute for Derek and Ries. Sigh!
Bill Campbell & Sharon Chaitt
Ready to Build Something Bold?
Reach out to us by filling the form, and let's begin the exciting discussion about your upcoming project. We also welcome calls to schedule a complimentary in-home consultation.