Bellingham ADU Regulations & Building Guide

Bellingham is a vibrant community located in Washington in Whatcom County with a population of approximately 95,960. 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 Bellingham 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.

Bellingham Local Requirements

Contact GatherADU for specific information about ADU regulations in Bellingham, 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

Bellingham, Washington, a city with a population of approximately 95,960, is located in the northwest corner of the state, near the Canadian border. Known for its scenic beauty, vibrant arts scene, and commitment to sustainability, Bellingham offers a unique blend of urban amenities and natural surroundings. The city’s ADU (Accessory Dwelling Unit) regulations are designed to enhance housing options while maintaining the character of its residential neighborhoods.

Geography and History

Bellingham is situated on Bellingham Bay, surrounded by picturesque landscapes, including the Cascade Mountains and the San Juan Islands. Founded in the late 19th century, Bellingham has evolved from a logging and shipping hub into a dynamic urban center with a focus on environmental stewardship and community well-being. The city’s waterfront, historic districts, and green spaces contribute to its distinctive character.

Local Economy

Bellingham's economy is diverse and includes several key sectors:

• Education: Western Washington University, located in Bellingham, is a major economic driver and cultural hub for the city.
• Healthcare: The healthcare sector, including facilities like Peace Health St. Joseph Medical Center, plays a significant role in the local economy.
• Retail and Services: The city features a range of shopping, dining, and service-oriented businesses that cater to residents and visitors.
• Tourism and Recreation: Bellingham’s natural beauty and outdoor activities attract tourists, contributing to the local economy.

Popular Neighborhoods

Bellingham's neighborhoods offer a variety of living environments:

• Fairhaven: A historic district known for its charming architecture, vibrant arts scene, and waterfront access.
• Whatcom Falls: Featuring natural parks and trails, this neighborhood offers a blend of outdoor recreation and residential living.
• Downtown Bellingham: The city’s commercial and cultural hub, with a mix of shops, restaurants, and entertainment options.
• Lettered Streets: A residential area with historic homes and a strong sense of community.

Real Estate Market

Bellingham's real estate market is characterized by a mix of single-family homes, apartments, and historic properties. The market has experienced steady growth, driven by the city's appeal and its status as a regional center for education and culture. The introduction of ADUs in Bellingham is intended to address housing needs and provide additional living options in response to rising property values and demand.

ADU Regulations in Bellingham

Bellingham has implemented ADU regulations to support the development of accessory dwelling units while ensuring compatibility with existing neighborhoods:

• Zoning: ADUs are permitted in all residential zones. Specific regulations apply to maintain neighborhood character and compatibility.
• 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 800 sqft.
  • Attached ADUs: Up to 50% of the primary dwelling’s living area or 800 sqft, whichever is less.
  • JADUs: Up to 500 sqft.
• Height Restrictions: Detached ADUs are generally limited to 15 feet in height to preserve the scale and character of residential areas.
• Parking: Typically, one additional parking space is required for detached ADUs. Exceptions may apply based on proximity to public transit.
• Owner Occupancy: There is no owner-occupancy requirement for ADUs, allowing for rental opportunities.
• Approval Process: ADUs that meet specific criteria benefit from a streamlined approval process, including administrative review for eligible projects.
• Multiple ADUs: In certain residential zones, multiple ADUs may be permitted, subject to zoning regulations and design standards.
• Impact Fees: Impact fees for ADUs are designed to be affordable, supporting the development of additional housing options.
• Design Standards: ADUs must be designed to complement the primary residence and maintain the character of the neighborhood.

These regulations are intended to support the development of additional housing options in Bellingham while preserving the city’s unique character and enhancing community livability.

Cultural Landmarks and Unique Aspects

Bellingham is known for its distinctive features:

• Fairhaven Historic District: A well-preserved area with historic buildings, eclectic shops, and waterfront views.
• Western Washington University: A major educational institution that contributes to the city’s cultural and intellectual life.
• Bellingham Railway Museum: Preserving the city’s railroad history and offering educational exhibits.
• Outdoor Recreation: Access to nearby mountains, forests, and waterways provides abundant opportunities for hiking, skiing, and other outdoor activities.

Bellingham’s ADU regulations reflect the city’s commitment to providing diverse housing options while preserving its scenic and historic character. By implementing policies that support the development of accessory dwelling units, Bellingham aims to address housing needs and enhance its community fabric. The city’s focus on sustainability and quality of life is evident in its approach to ADUs, making it a model for progressive urban planning in the Pacific Northwest.

‍