Accessory Dwelling Units ADUs have become one of the most effective ways Bay Area homeowners can add living space, generate rental income, or house extended family, without the cost of buying additional land. California’s ADU laws have made these units easier to build than ever, but navigating zoning, permitting, and utility requirements still takes real expertise. As a real estate development company with an in-house construction team, Bay Area Developers evaluates every ADU project the way we evaluate any development opportunity: for buildability, long-term value, and return on investment, not just square footage.
From detached backyard units to garage conversions and attached ADUs, we manage the full process in-house from feasibility and design through permitting and construction.
ADU regulations shift frequently at the state and local level, and eligibility depends on lot size, existing structures, setbacks, and utility capacity details that are easy to misjudge without development experience. Because our team assesses properties from a development standpoint first, we identify what’s realistically buildable, what will clear permitting, and what will actually add value to your property before design work begins. That matters whether your goal is rental income, multigenerational housing, or long-term property value.
Standalone backyard units, fully separate from the primary residence, ideal for rental income or private guest/family housing.
Converting an existing attached or detached garage into a livable unit, often the most cost-effective ADU path.
Units built as an addition to the primary residence with a separate entrance and living space.
Smaller units created within the existing footprint of a home, typically sharing some systems with the primary residence.
We assess your lot size, existing structures, and local zoning to determine which ADU type is realistically achievable and financially worthwhile before any design work begins.
Our team designs a unit that fits your goals, whether that's maximizing rental income, accommodating a family, or preserving yard space while meeting current ADU size and setback requirements
ADU permitting involves its own set of state and local requirements, including utility connections and, in some cases, owner-occupancy or rental restrictions depending on your city. We manage this process directly so nothing gets missed.
Our in-house crews handle site work, framing, utility tie-ins, and finish work, with dedicated project management tracking budget, schedule, and quality from groundbreaking to completion.
We complete a detailed walkthrough with you before handoff to confirm the finished unit meets code requirements and your expectations.
We build ADUs throughout Berkeley and the greater San Francisco Bay Area, including Oakland and surrounding East Bay communities.
In most Bay Area jurisdictions, yes ADU rental rules vary by city, and some restrict short-term rentals or require owner-occupancy of the primary residence. We review current local rules with you during the feasibility stage.
Maximum size depends on your lot, local ordinance, and ADU type (detached, attached, garage conversion, or JADU). State law sets baseline allowances, but cities can vary in how they apply them we confirm exact limits for your property before design begins.
It depends on the ADU type and your existing systems. Some ADUs can share utility connections with the primary residence; others require separate metering. We evaluate this during feasibility and account for it in permitting.
If you’re considering an ADU in Berkeley or the greater Bay Area, we’d welcome the opportunity to evaluate your property’s potential and walk you through what’s realistically achievable.
