Concord ADU Regulations & Building Guide

Concord is a vibrant community located in California with a population of approximately 128,726. 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 Concord 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.

California State ADU Laws

California has some of the most progressive ADU legislation in the country. Recent laws including AB 68, SB 13, and AB 881 have significantly streamlined the ADU approval process and reduced barriers for homeowners.

Key California ADU Regulations:

• Size Limits: Detached ADUs can be up to 1,200 sq ft. Attached ADUs can be up to 50% of the primary dwelling or 1,200 sq ft, whichever is less.
• Setbacks: Minimum 4-foot side and rear setbacks for detached ADUs.
• Height: Generally up to 16 feet, with some exceptions for two-story ADUs (up to 25 feet in certain zones).
• Parking: No additional parking required in most cases, especially near transit.
• Owner Occupancy: No owner-occupancy requirement until 2025 for most ADUs.

Concord Local Requirements

While California state law provides baseline regulations, Concord may have additional local requirements. GatherADU's team stays current with Concord's specific zoning codes, architectural guidelines, and permit processes to ensure your ADU project meets all requirements.

Common local considerations in Concord include:

• Design review requirements and architectural standards
• Utility connection fees and impact fees
• Fire department access requirements
• Neighborhood-specific overlay zones

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.

California ADU Legislation Overview

California leads the nation in ADU-friendly legislation. The state has passed numerous laws to encourage ADU construction as a solution to the housing crisis.

Key California ADU Laws:

• AB 68 (2020): Reduced local government review time and expanded ADU construction options.
• SB 13 (2020): Limited impact fees and reduced owner-occupancy requirements.
• AB 881 (2020): Prohibited minimum lot size requirements and allowed JADUs in all zones.
• AB 2221 (2022): Further streamlined the ADU approval process.
• SB 897 (2022): Increased height limits for ADUs in certain zones.

California ADU Benefits:

• Property value increase of 20-30% on average
• Rental income potential of $1,500-$3,500+ monthly
• Housing flexibility for family members
• No owner-occupancy requirements (until 2025)

Concord, California, is a city located in the San Francisco Bay Area, known for its vibrant community, historic downtown, and family-friendly atmosphere. With a population of approximately 128,726, Concord is a prominent city in Contra Costa County and offers a blend of suburban living with access to metropolitan amenities.

Geography and History

Concord is situated about 30 miles east of San Francisco, making it a convenient location for those working in the Bay Area but seeking a more suburban lifestyle. The city was incorporated in 1905 and has grown from its agricultural roots into a diverse and dynamic community.

Local Economy

Concord’s economy is diverse, with key sectors including:

• Retail and Services: The city features major shopping centers such as the Sunvalley Shopping Center and a variety of local shops and restaurants.
• Healthcare: Includes facilities like the John Muir Health Concord Medical Center, which plays a significant role in the local economy.
• Education: Home to several schools and educational institutions that contribute to the city’s educational landscape.
• Manufacturing and Technology: Includes companies involved in manufacturing and tech, contributing to economic growth.
• Tourism and Recreation: Attractions include local parks, historic sites, and community events that draw visitors and enhance local economic activity.

Popular Neighborhoods

Concord offers a variety of neighborhoods, each with unique characteristics:

• Downtown Concord: Known for its historic charm, local shops, dining options, and cultural events.
• Clayton Valley: Features a suburban feel with good schools and family-friendly amenities.
• Walnut Creek Border: Offers a mix of residential areas with access to Walnut Creek’s amenities and parks.
• Eagle Peak: Known for its scenic views, larger homes, and proximity to outdoor recreational areas.
• College Park: Includes a range of housing options and is close to local schools and community services.

Real Estate Market

Concord’s real estate market is characterized by a range of housing options, from historic homes to new developments. The market has been stable, with competitive prices reflecting the city’s appeal as an affordable alternative to San Francisco and other Bay Area cities. Homes often feature larger lots and more space compared to more densely populated areas.

ADU Regulations in Concord

Concord has established Accessory Dwelling Unit (ADU) regulations that align with California state laws while addressing local needs. These regulations are designed to facilitate ADU development while maintaining the city’s residential character.

• Zoning: ADUs are permitted in residential zones, including single-family and multi-family districts.
• Types of ADUs: Both attached and detached ADUs are allowed, as well as Junior ADUs (JADUs).
• Size Limits:
  • Detached ADUs: Up to 1,200 sqft.
  • Attached ADUs: Up to 50% of the primary dwelling’s living area or 1,200 sqft, whichever is less.
  • JADUs: Up to 500 sqft.
• Height Restrictions: Detached ADUs are generally limited to 16 feet in height, with some exceptions based on site-specific conditions.
• Parking: Generally, no additional parking is required for ADUs if located within a half-mile of a transit stop. In other areas, one additional parking space may be required.
• Owner Occupancy: As of recent updates, there is no owner-occupancy requirement for ADUs, though owner occupancy is required for properties with JADUs.
• Approval Process: ADUs that meet specific criteria are eligible for a streamlined review process to expedite approvals.
• Multiple ADUs: In multi-family properties, up to two detached ADUs are allowed, or ADUs for 25% of the existing units within the structure, whichever is greater.
• Impact Fees: Impact fees for ADUs are often reduced to encourage development and affordability.
• Design Standards: ADUs must be designed to complement the primary residence and adhere to neighborhood character, including architectural compatibility and landscaping requirements.

These regulations reflect Concord’s commitment to increasing housing options while preserving the city’s residential and suburban quality.

Cultural Landmarks and Unique Aspects

Concord is known for several unique aspects and cultural landmarks:

• Todos Santos Plaza: A central gathering place featuring farmers' markets, events, and local dining options.
• Concord Pavilion: A venue for concerts and events, offering a range of entertainment options.
• Markham Nature Park and Arboretum: A large park featuring walking trails, gardens, and recreational facilities.
• Historic Downtown: Includes a variety of historic buildings, local shops, and cultural attractions.
• Waterworld California: A popular water park offering family-friendly attractions and activities.

Concord’s ADU regulations aim to support the city’s housing needs while maintaining its suburban and residential character. With its diverse neighborhoods, cultural landmarks, and family-friendly environment, Concord offers a unique living experience in the San Francisco Bay Area. The city’s approach to ADU development reflects its commitment to accommodating growth and enhancing the community experience, ensuring that Concord remains a vibrant and attractive place to live.

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