Accessory Dwelling Units (ADUs) are becoming an increasingly popular solution for homeowners seeking additional living space, rental income, or a place for family members. If you're considering adding an ADU to your property in Tacoma, this guide will answer your pressing questions and explain how Pacific Home Source can streamline the process for you.

1. How Do I Apply for an ADU in Tacoma?

To apply for an ADU in Tacoma, you'll need to:

-Submit a Land Use Application: This includes detailed site plans and architectural drawings.​

-Provide Additional Documentation: Depending on your project, this may involve building, plumbing, mechanical, and electrical plans.​

-Apply Online: Applications can be submitted through the Tacoma Permits portal.​

The City of Tacoma offers a comprehensive Accessory Dwelling Units Tip Sheet to guide you through the process.​

2. How Much Does an ADU Cost?

The cost of building an ADU varies based on size, design, and site conditions. On average, homeowners can expect to spend between $150 to $300 per square foot. At Pacific Home Source, our smaller ADU design projects start at $3,500, making them an affordable option for many homeowners to start the process.

3. What Does ADU Stand For, and What Is the Difference Between an ADU and a DADU?

- ADU (Accessory Dwelling Unit): A secondary housing unit attached to or within the primary residence.​Madrona Group

- DADU (Detached Accessory Dwelling Unit): A standalone structure separate from the main house, often referred to as a backyard cottage.​

Both serve similar purposes but differ in their physical connection to the main dwelling.​

4. Why Is Building an ADU Expensive for Homeowners?

Several factors contribute to the cost of building an ADU:

- Construction Costs: High-quality materials and skilled labor are essential.​

- Permitting and Design Fees: Navigating local regulations requires professional assistance.​

- Utility Connections: Extending or upgrading utilities can be costly.​

- Site Preparation: Land grading, foundation work, and other site-specific requirements add to the expense.​

5. Can an ADU Have Separate Forms of Primary Heat?

Yes, each ADU must have its own heating and ventilation system. Sharing HVAC systems between the primary residence and the ADU is not permitted. However, a shared water heater may be allowed if it's adequately sized to serve both units.

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6. Can an ADU Be Built in My Front Yard?

In Tacoma, ADUs are typically required to be located behind or to the side of the primary residence. Building an ADU in the front yard is generally not permitted due to zoning regulations. It's essential to consult the city's guidelines or a professional to understand specific site constraints.​

7. Can an ADU Be Attached to the House?

Yes, ADUs can be attached to the primary residence. Both Pierce and King Counties allow attached ADUs, provided they meet specific zoning and building code requirements. These include considerations for size, setbacks, and separate entrances.​

8. Can the ADU Be Bigger Than the Primary House?

No, the size of an ADU is typically restricted to ensure it remains subordinate to the primary dwelling. In Tacoma, the maximum size for an ADU is 1,000 square feet or 75% of the primary residence's size, whichever is less. ​

9. Can I Build an ADU Without a Permit?

Building an ADU without the necessary permits is not allowed in Tacoma. All ADU projects must go through the city's permitting process to ensure compliance with local building codes and zoning laws. Unpermitted structures can lead to fines and may need to be removed.​

10. How Can Pacific Home Source Help Make This Happen?

At Pacific Home Source, we offer a comprehensive suite of services to assist you in building your ADU:

- Site Evaluation: We conduct thorough assessments to determine feasibility.​

- Custom Design Plans: Our team works with you to create designs that meet your needs and comply with local regulations.​

- Permit Assistance: We provide a turnkey service to guide you through the permitting process, ensuring all documentation is correctly submitted.

- Engineering Referrals: If structural engineering is required, we can connect you with trusted professionals we have partnered with before.

Our goal is to make the ADU construction process as seamless and stress-free as possible.