Kennewick ADU Regulations & Building Guide

Kennewick is a vibrant community located in Washington in Benton County with a population of approximately 86,470. 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 Kennewick 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.

Kennewick Local Requirements

Contact GatherADU for specific information about ADU regulations in Kennewick, 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

Kennewick, Washington, with a population of approximately 86,470, is a thriving city in the southeastern part of the state, known for its rich history, scenic landscapes, and dynamic community. As part of the Tri-Cities area, Kennewick offers a blend of urban amenities and outdoor recreational opportunities. The city's approach to Accessory Dwelling Unit (ADU) regulations reflects its commitment to addressing housing needs while maintaining community standards.

Geography and History

Located along the Columbia River, Kennewick boasts a semi-arid climate with warm summers and mild winters. The city's history includes indigenous cultures, early pioneers, and a strong agricultural heritage, contributing to its diverse and vibrant character.

Local Economy

Kennewick's economy is diverse, with major sectors including:

• Agriculture: The region is known for its vineyards, orchards, and agricultural production.
• Healthcare: A significant employer with several hospitals and medical centers.
• Retail and Services: Kennewick serves as a commercial hub for the Tri-Cities area.
• Technology and Manufacturing: Growing presence of tech firms and manufacturing industries.

Popular Neighborhoods

Kennewick features several attractive neighborhoods, each with its unique appeal:

• Southridge: Known for new developments, parks, and a family-friendly atmosphere.
• Historic Downtown: Offers a mix of historic charm, shops, and dining options.
• West Kennewick: Features suburban living with access to good schools and amenities.
• Canyon Lakes: A golf course community with upscale homes and scenic views.
• Central Kennewick: A blend of residential and commercial areas, providing convenience and accessibility.

Real Estate Market

Kennewick's real estate market is characterized by a range of housing options, from affordable starter homes to upscale properties. The city's growth and development have led to a steady demand for housing, making ADUs an attractive option for homeowners seeking additional income or living space.

ADU Regulations in Kennewick

Kennewick has established ADU regulations to provide more housing options while maintaining neighborhood character and livability:

• Zoning: ADUs are allowed in most residential zones, including single-family and multi-family areas.
• Types of ADUs: Both attached and detached ADUs are permitted.
• Size Limits:
  • Detached ADUs: Typically up to 800 sqft, but can be larger depending on lot size.
  • Attached ADUs: Up to 50% of the primary dwelling’s living area.
• Height Restrictions: ADUs are generally limited to one story and must not exceed the height of the primary dwelling.
• Parking: One additional off-street parking space is required for ADUs, but this requirement can be waived if the ADU is within half a mile of public transit.
• Owner Occupancy: The property owner must reside in either the primary dwelling or the ADU.
• Approval Process: ADUs that meet zoning and building requirements are subject to a streamlined administrative approval process.
• Design Standards: ADUs must be compatible with the primary dwelling and neighborhood aesthetics, including considerations for materials, roof pitch, and color.
• Multiple ADUs: Typically, only one ADU is allowed per lot.

Cultural Landmarks and Unique Aspects

Kennewick is known for several unique features that enhance its appeal:

• Columbia Park: A large waterfront park offering recreational activities and annual events.
• Toyota Center: Hosts concerts, sports events, and community gatherings.
• The REACH Museum: Focuses on the natural and cultural history of the Columbia Basin.
• Three Rivers Convention Center: A venue for conferences, trade shows, and special events.
• Wine Country: Proximity to numerous wineries and vineyards in the renowned Washington wine country.

Kennewick’s ADU regulations aim to provide flexible and sustainable housing solutions while preserving the city’s community character and livability. By offering clear guidelines and a streamlined approval process, Kennewick encourages the development of ADUs to address housing needs, support economic growth, and enhance the quality of life for residents. The city's approach to ADUs aligns with its broader goals of promoting diverse housing options, fostering community development, and maintaining its unique identity as a vibrant and welcoming place to live.

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