Federal Way ADU Regulations & Building Guide

Federal Way is a vibrant community located in Washington in King County with a population of approximately 102,000. As demand for housing continues to grow, accessory dwelling units (ADUs) have become an increasingly popular solution for homeowners looking to add living space, generate rental income, or house family members.

GatherADU provides comprehensive ADU services to Federal Way residents, including custom design, permit assistance, and full construction management. Our team understands local building codes and zoning regulations to ensure your project proceeds smoothly.

Washington State ADU Laws

Washington state has enacted legislation to encourage ADU construction as part of efforts to address housing affordability and availability.

Key Washington ADU Regulations:

• Size Limits: Vary by jurisdiction, typically 800-1,000 sq ft.
• Parking: Many cities have reduced or eliminated parking requirements.
• Short-Term Rentals: Local regulations may apply to ADU rentals.

Federal Way Local Requirements

Contact GatherADU for specific information about ADU regulations in Federal Way, Washington.

California law (AB 68, AB 881, SB 9, and subsequent legislation) guarantees your right to build ADUs. Cities cannot:

• Require owner-occupancy for ADUs permitted after 2020
• Require additional parking for ADUs near transit
• Charge impact fees for ADUs under 750 sq ft
• Deny ADUs that meet state minimum standards
• Impose lot coverage limits that prevent a 800 sq ft ADU

If you believe your ADU application is being unfairly denied, California HCD can intervene on your behalf.

Washington ADU Legislation Overview

Washington state continues to expand ADU opportunities for homeowners across the state.

Key Washington ADU Developments:

• Statewide mandate for cities to allow ADUs
• Reduced parking requirements in many jurisdictions
• Streamlined permitting processes

Federal Way, Washington, is a city located in King County with a population of approximately 102,000 residents. Situated between Seattle and Tacoma, Federal Way is known for its suburban atmosphere, diverse community, and access to numerous parks and recreational facilities. The city’s regulations for Accessory Dwelling Units (ADUs) aim to address housing needs and support residential growth in this vibrant urban area.

Geography and History

Federal Way is nestled in the Puget Sound region of Washington, bordered by Des Moines to the west and Kent to the east. Incorporated in 1990, the city has grown from its origins as a small community into a significant suburban center. Its location provides residents with access to scenic natural areas, including nearby lakes and forests.

Local Economy

Federal Way’s economy is characterized by a blend of local businesses, retail, and services:

• Retail and Services: The city features major shopping centers, restaurants, and service providers that cater to both residents and visitors.
• Education: Federal Way School District and nearby institutions contribute to the local economy and provide educational opportunities.
• Healthcare: Several medical centers and clinics serve the community, offering essential healthcare services.
• Technology and Business: Federal Way attracts various businesses and technology companies, contributing to its economic diversity.

Popular Neighborhoods

Federal Way is home to several neighborhoods with unique characteristics:

• Downtown Federal Way: Known for its commercial and business centers, this area includes the Federal Way Transit Center and various retail outlets.
• Redondo: A waterfront neighborhood with access to the Redondo Beach and marina, offering scenic views and recreational activities.
• Twin Lakes: A residential community featuring golf courses, parks, and family-friendly amenities.
• West Campus: Home to several educational institutions and residential areas, providing a suburban feel with access to local services.

Real Estate Market

The real estate market in Federal Way includes a range of housing options from single-family homes to townhouses and apartments. The city’s relatively affordable housing compared to neighboring urban areas makes it an attractive option for homebuyers and renters. The market also supports innovative housing solutions like ADUs.

ADU Regulations in Federal Way

Federal Way has established guidelines for Accessory Dwelling Units (ADUs) to facilitate residential development and address housing demands:

• Zoning: ADUs are permitted in residential zones, with specific regulations to ensure compatibility with existing properties.
• Types of ADUs: Both attached and detached ADUs are allowed, including conversions of existing structures and Junior ADUs (JADUs).
• Size Limits:
  • Detached ADUs: Up to 1,000 sqft.
  • Attached ADUs: Up to 50% of the primary dwelling’s living area or 1,000 sqft, whichever is less.
  • JADUs: Up to 500 sqft.
• Height Restrictions: Detached ADUs are generally limited to a height of 16 feet, with some flexibility based on design and location.
• Parking: Additional parking requirements for ADUs are minimal, especially if located near public transit or within walkable neighborhoods.
• Owner Occupancy: Federal Way does not require owner-occupancy for newly constructed ADUs, allowing for rental opportunities.
• Approval Process: ADUs that meet city standards may benefit from a streamlined approval process, including ministerial review.
• Multiple ADUs: In multi-family zones, additional ADUs may be allowed, subject to specific zoning regulations and design criteria.
• Impact Fees: Reduced impact fees are available for ADUs to encourage development and support affordable housing options.
• Design Standards: ADUs must be designed to harmonize with the primary residence and neighborhood character, considering aesthetics and materials.

These regulations are intended to expand housing options in Federal Way while preserving the city’s suburban charm and quality of life.

Cultural Landmarks and Unique Aspects

Federal Way is known for several distinctive features:

• Cultural Attractions: Includes the Pacific Bonsai Museum and the Federal Way Performing Arts and Events Center, which contribute to the city’s cultural scene.
• Parks and Recreation: Home to numerous parks, including Dash Point State Park and Celebration Park, providing recreational opportunities and natural beauty.
• Diverse Community: The city’s diverse population is reflected in its cultural events and community programs, promoting inclusivity and engagement.

Federal Way’s ADU regulations reflect the city’s commitment to addressing housing needs and supporting residential growth. With its suburban appeal, diverse community, and access to recreational amenities, Federal Way offers a conducive environment for residential development. The city’s ADU policies aim to enhance housing options while maintaining the quality of life and character that make Federal Way a desirable place to live.

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