Custom ADUs, Accessory Dwelling Units

Detached or Attached—Built to Suit Your Lifestyle & Property.

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Recent ADU Builds

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Types of ADU Units We Build

Detached ADU (Stand-Alone Unit)

A completely separate structure built in the backyard or side yard
Ideal for guest houses, rentals, or private living quarters
Offers full privacy and independence

Attached ADU

Built as an extension of the main home with shared walls
Great for in-laws or adult children needing close proximity with privacy
May share utilities or entry points with the main residence

Garage Conversion ADU

Transforms an existing garage into a livable space
Cost-effective way to add a bedroom, studio, or rental unit
Includes insulation, plumbing, electrical, and full interior buildout

Above-Garage ADU (Garage Loft or Carriage House)

Constructed above a new or existing garage
Perfect for maximizing vertical space without losing yard area
Great for long-term guests, grown children, or Airbnb

Basement ADU (Where Permitted)

Converts an existing basement into a self-contained living space
Includes kitchen, bathroom, and private entrance
Often used for rentals or multi-generational housing

Backyard Cottage or Guest House

Small, detached living unit designed with a cozy, residential feel
Ideal for visiting family or live-in caregivers
Can be modern or classic in style, fully tailored to your aesthetic

Senior or In-Law Suites (Aging-in-Place ADUs)

Designed for accessibility and comfort
Includes features like walk-in showers, wider doors, ramps, and no-step entries
Keeps family close while maintaining privacy

Work-From-Home | Studio ADUs

A custom ADU built as an office, studio, or creative workspace
Includes workspace lighting, soundproofing, and private access
Perfect for remote professionals or artists

Rental-Ready ADUs (for Long-Term or Short-Term Leasing)

Built specifically for rental income
Designed with efficient layouts, durable finishes, and separate access
Includes all amenities for tenant independence

Mini-Suite or Micro ADU

Compact units under 500 sq. ft.
Efficient designs with all essentials: bed, bath, kitchenette
Great for smaller properties or budget-conscious builds

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Recent Client Reviews

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Why Clients Choose Us

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ADU Design & Construction Since 2005

We’ve been building high-quality custom ADUs for Southern California homeowners since 2005—earning a trusted reputation for expert craftsmanship, honest service, and results that last for generations.

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Built on a Trusted Reputation & Referrals

Over 95% of our ADU projects come from client referrals—earned through reliable results, lasting relationships, and the trust we bring to every build.

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Only the Best Materials for Lasting ADUs

No compromises—every ADU we build uses top-grade, trusted materials to ensure your space not only looks beautiful but stands strong for years to come.

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Fully Custom Additions

Whether you’re starting with full architectural plans or a simple idea, we design and build fully custom ADUs to match your needs. If you can envision it, we’ll build it—just the way you imagined.

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Owner-Led Oversight on Every ADU

From the first consultation to the final inspection, Lincoln James is personally involved in every ADU project—ensuring clear communication, detailed execution, and accountability you can trust from start to finish.

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Reliable Scheduling & Budget Management for ADUs

When it comes to building ADUs, we understand the importance of staying on time and on budget. Our structured planning keeps your project moving efficiently, with no surprise delays or unexpected costs.

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Licensed & Fully Insured for ADU Construction

As a California-licensed contractor (#B-860952), we adhere to all building codes and regulations—ensuring your ADU is built safely, legally, and with the highest level of professional standards.

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Locally Owned & Community Focused

Lincoln James Construction is proud to serve Ventura and Los Angeles Counties as a locally owned business. We understand the needs of our neighbors and approach every ADU project with the same care, integrity, and personalized service we’d expect in our own community.

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