
ADU Construction In Seattle
ADUs
With Over Two Decades Of Experience, GLC Is The Puget Sound's Premier ADU Builder—Creating Custom Accessory Dwelling Units With Transparent Pricing And Quality Craftsmanship.

Proudly Based In
Seattle, WA
About This Service
Build A Custom ADU With Maximum Potential
Accessory Dwelling Units represent one of the smartest investments Seattle homeowners can make. Our expert ADU services add valuable living space, generate rental income, and significantly increase property values while navigating complex Pacific Northwest regulations with expertise.
Complete ADU design optimized for Seattle and Washington state regulations
Expert navigation of permits, zoning, and approval processes
Custom floor plans maximizing efficiency and functionality
Complete utility connections including electrical and plumbing
Quality construction with modern, energy-efficient features
Transparent pricing with detailed estimates and updates
Generate Rental Income
Well-designed ADUs generate $2,000-$4,000+ monthly in the Seattle market—potentially $24,000-$48,000+ annually that offsets costs and builds wealth.
Increase Property Value
ADUs typically add $200,000-$450,000+ in value depending on size and quality—often exceeding construction costs with immediate equity gains in competitive Seattle neighborhoods.
Multi-Generational Housing
Ideal for aging parents, adult children, or caregivers—providing proximity with independence, privacy, and separate living spaces for extended family.
Flexible Living Space
Home office, guest suite, rental unit, or studio—ADUs adapt to your changing needs over time, making them versatile investments for Seattle homeowners.

Our Results
Before & After Transformations
Browse through our portfolio of adus projects across Seattle and the Puget Sound. Each transformation showcases our commitment to quality craftsmanship and attention to detail.


Garage Conversion ADU — Capitol Hill, Seattle


Detached Backyard ADU — Ballard, Seattle
Our Process
How We Work
We follow a proven process to ensure your project is completed on time, within budget, and to your exact specifications.

Site Assessment & Feasibility
We evaluate your property for ADU potential, check Seattle zoning requirements, and identify the best ADU type for your lot and goals.

Design & Permitting
Custom ADU design tailored to your needs, followed by comprehensive permit application handling with Seattle's Department of Construction and Inspections.

Construction & Build
Expert craftsmanship from foundation to finishing, with regular updates and adherence to Pacific Northwest building standards and timelines.

Final Inspection & Handoff
Complete walkthrough, utility connections, final inspections, and documentation for a seamless ADU launch.
Why Choose Us
Why Homeowners Trust GLC Remodeling

50+
Projects Completed
Across The Puget Sound
Transparent Pricing
We provide detailed estimates upfront, so you know exactly what to expect. No hidden costs, no surprises—just honest pricing for quality work.

Built to Last
Quality Materials
We source premium materials that withstand Seattle's climate while delivering lasting beauty and performance for your adus project.
Permit Handling
We navigate Seattle's permitting process for you
Timely Completion
Projects completed on schedule, every time
Clear Communication
Regular updates throughout your project
Locally Owned & Operated
As Seattle natives, we understand the unique needs of Puget Sound homeowners. We're your neighbors, committed to building lasting relationships through exceptional adus services.

What Our Clients Say
ADUs Reviews
Additional Services
Explore Our Other Remodeling Services
Common Questions
Frequently Asked Questions About ADUs
Have questions about your upcoming kitchen remodel? Here are the answers to the most common questions we receive from homeowners.
ADU projects typically take 6-10 months from design to completion, depending on complexity and permitting timeline with the City of Seattle.
ADU construction ranges from $200,000-$450,000 depending on size, type (detached vs attached), and finish level. We provide detailed quotes upfront.
Yes, ADUs require permits from Seattle's Department of Construction and Inspections. We handle all permitting, zoning verification, and inspections.
Yes, Seattle allows ADU rentals. Many homeowners generate $2,000-$4,000 monthly in rental income from their ADU.

Ready to Get Started?
Transform Your Home With Expert ADUs Services
Schedule your free consultation today and discover why Seattle homeowners trust GLC for their adus needs. No pressure, just honest advice and expert guidance.

Let's Discuss Your ADUs Project
Request A Free Quote
Fill out the form below and one of our adus experts will contact you within 24 hours to schedule your free in-home consultation.
Free In-Home Consultation
We come to you—no showroom visits needed
24-Hour Response Time
We value your time and respond quickly
4.9 Star Rated
Trusted by homeowners throughout the Puget Sound
Prefer to call?
818-293-4469Request a Free Quote
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