ADU Construction in Snohomish County, WA


Introduction to ADU Construction
1. Research and Planning
We Understand Local Regulations: We verify zoning laws, permitting requirements, and building codes in your area. We ensure that your property qualifies for an ADU and review size, height, and setback restrictions. Once we confirm the site details, we can move forward towards design and permitting.
We Guide You Through Deciding A Purpose and Budget: You can choose whether the ADU will be for rental income, a family member, or personal use. Set a realistic budget, including construction, permits, and utility hookups.
We Help Design the ADU: Choose between detached, attached, or conversion options (e.g., garage or basement). We can provide plans to choose from, or help coordinate an architect to design custom ADU plans that will pass permittting and inspections.
2. Secure Necessary Permits
We Submit Plans for Approval: We present detailed construction drawings, plans, and specifications to your local planning department.
Apply for Required Permits: Obtain building, electrical, plumbing, and other relevant permits. You may also need environmental or utility impact reviews, depending on your location.
3. Prepare the Site
DIGS Construction Will Clear and Assess the Land: Remove any obstacles, level the site, and ensure proper drainage.
We Connect Utilities: Coordinate with utility providers for water, sewer or septic, gas, and electrical connections. Plan for separate or shared meters depending on the ADU's intended use.
We Address Foundation Needs: Depending on the design, we prepare a slab, crawl space, or another foundation type.
4. Construct the ADU
Hire Professionals: Work with DIGS a licensed contractor for construction, ensuring compliance with approved plans and codes. We make it easy.
We keep you updated: We manage the project and conduct frequent inspections to ensure timelines are met and quality standards are maintained. We can provide weekly or even daily updates as needed. Permit inspections are required at various stages (e.g., framing, electrical, plumbing). We manage all of this for you.
Choose Your Features: You can add millwork and trim such as baseboards and wainscoting, or keep it simple. You can select from a variety of appliances and enhancements.
5. Finalize and Inspect
Pass Final Inspections: Schedule a final walkthrough with local inspectors to ensure all work complies with regulations and permits.
Obtain a Certificate of Occupancy: Receive formal approval to use the ADU as a livable space.
Furnish and Occupy: Add finishing touches such as furnishings and landscaping. Decide whether to rent, use, or house family members in the completed unit.
We manage these steps and successfully build an ADU that meets your needs while adhering to local requirements.
The Importance of An ADU Builder

Construction Services in Snohomish
Pre-construction Consultation and Planning
Site Clearing and Grading
Excavation and Earthwork
Utilities Installation
Drainage and Erosion Control
Custom Homes, ADU's and DADU's
The DIGS Difference in ADU and DADU Construction
Experience and Expertise
Attention to Safety and Compliance
Personalized Approach to Customer Service
Conclusion
From pre-construction planning to site clearing, excavation, utilities installation, and erosion control, we handle every aspect of the construction process with precision and attention to detail.
With our experience, commitment to safety, and personalized customer service, we are dedicated to delivering exceptional results.


Frequently Asked ADU & DADU Questions (FAQs)
How long does the ADU or DADU construction process take?
The duration of construction can vary depending on the project’s size, complexity, and external factors such as weather conditions. We provide estimated timelines based on the specific requirements of each project.
Are permits necessary for every ADU or DADU building?
Yes, permits are required for every municipality. We can help you research the feasibility of the property and determine the options, apply for the permits and provide you with plans or connect you with an architect for a custom design.
How much do DADU's or ADU's cost?
The cost of an ADU or DADU can vary depending on factors such as size, site conditions, building materials selected, options, and even the appliances selected. We provide detailed and transparent cost estimates based on the scope of work during the consultation phase.
How do I select a general contractor?
When you select a general contractor to build an ADU or DADU, make sure they have experience doing so. You should be able to see completed work. They should be able to provide a construction process outline, a detailed estimate of each phase of the project, and only require a reasonable down payment. Make sure they are licensed and insured, and ask lots of questions to determine their knowledge.
Do I need to own land?
Yes. You need to own land or be in a position to purchase land that qualifies. Most areas allow ADU’s and DADU’s, but not all. Consult with your general contractor to evaluate your land or the property you are interested in before you buy to make sure it will meet your needs.
How can I get started with my project?
To get started with your project, reach out to our team at DIGS Contruction and ADU Builders. We offer an initial consultation where we discuss your project requirements, provide expert advice, and develop a tailored site development plan to bring your vision to life.
About Snohomish WA
The city was originally founded in 1859 as Cadyville, named after settler E. F. Cady, and later renamed Snohomish in 1871, reflecting the local Coast Salish tribe. The Snohomish people inhabited the region for thousands of years before European settlement, with archaeological evidence of human habitation dating back 8,000 years. Following the Point Elliott Treaty of 1855, the Snohomish people were relocated to the Tulalip Indian Reservation. Snohomish quickly became a center of commerce in the region and served as the county seat from 1861 to 1897 before losing the title to Everett.
Throughout its history, Snohomish has seen steady development and resilience. It was incorporated as a town in 1888 and later as a city in 1890, following Washington's statehood. By the late 19th century, the city had become a vibrant community with schools, businesses, and a thriving economy. Notably, First Street was paved with brick in 1903, and the city celebrated the occasion with a grand event. A fire in 1911 led to significant rebuilding in brick, solidifying the downtown's enduring aesthetic.
Snohomish has weathered economic shifts and natural disasters with perseverance. During the Great Depression, its agrarian economy provided stability, while the 1930s brought recognition as the hometown of baseball star Earl Averill. In the mid-20th century, urban decay posed challenges, prompting initiatives to preserve and revitalize the downtown area. The establishment of a historic district in 1973 and its inclusion in the National Register of Historic Places in 1974 marked a turning point in protecting its architectural legacy.
In the latter half of the 20th century, Snohomish faced significant challenges, including a devastating flood in 1975. However, the community united to support recovery efforts, showcasing its resilience. The rerouting of U.S. Route 2 in 1985 alleviated downtown congestion, allowing the city to focus on tourism and heritage preservation. By the 1990s, First Street underwent redevelopment to attract visitors, with updated sidewalks and public facilities enhancing the area’s appeal.
Today, Snohomish is celebrated as a destination for history enthusiasts and antique lovers. Its historic business district, vintage architecture, and vibrant cultural events draw tourists year-round. While modern developments have expanded its footprint, the city remains committed to preserving its unique character, blending historical charm with contemporary community life.
Snohomish’s rich history, from its roots as a tribal homeland to its evolution as a hub of commerce and culture, continues to define its identity. The city’s commitment to honoring its past while embracing growth ensures its place as a treasured part of Washington state’s heritage.