ADU Builder in Los Angeles

Maximize Your Property
with a Custom ADU.

Accessory Dwelling Units are one of the smartest ways to increase livable space, earn rental income, or accommodate multi-generational living - all without changing your main residence. At Optima Design & Build, we specialize in ADUs that are practical, beautiful, and perfectly integrated into your existing property.

What Can an ADU Do For You?

An ADU is a secondary residential structure on your property. Los Angeles has embraced ADUs as part of the solution to the housing shortage - making them one of the best ways to unlock your property's potential.

Rental Income A passive income stream from a separate unit on your property.
Guest House Private, comfortable space for family or visitors.
Multi-Generational Keep family close while maintaining independence.
Home Office A fully separate, dedicated workspace away from the home.
Recent ADU work

ADU Kitchen in Long Beach

A full kitchen designed to fit an ADU footprint without feeling small: white shaker cabinets to the ceiling, quartz counters, a marble tile backsplash, a stainless hood and compact, space-saving appliances.

Long Beach ADU kitchen with quartz countertopsLong Beach ADU kitchen with white shaker cabinetsADU kitchen in Long Beach by Optima Design & Build

See our work in Long Beach →

Our proven process

How an ADU Project Works

Every ADU follows a structured process designed to keep you informed, on budget, and on schedule from day one.

Phase 1
Consultation & Estimate
~1 week
Free on-site consultation where we evaluate your space, review zoning and setback requirements, and assess utilities to determine feasibility. We also provide an initial cost estimate so you know what to expect from the start.
Phase 2
Design & Planning
1 - 2 months
Custom architectural plans, 3D renderings, and specifications tailored to your needs and budget. We refine the design with your feedback and prepare documentation for permitting.
Phase 3
Permitting & Materials
2 - 6 months
While plans are under city review, we finalize all major material selections in parallel - keeping the project moving and ensuring everything is ready when construction begins.
  • City-specific review timelines
  • Hillside or sloped lots
  • Coastal Commission oversight
  • Utility connection upgrades
  • ADU type complexity (garage conversion vs. detached)
Phase 4
Pre-Construction
1 - 2 weeks
Final plans reviewed, material orders confirmed, and construction start date scheduled. Short but essential for a smooth and efficient build.
Phase 5
Construction & Completion
3 - 9 months
Our team handles every phase of the build from start to finish.
  • Grading and foundation
  • Framing and roofing
  • Electrical, plumbing, and insulation
  • Drywall, flooring, and finishes
  • City inspections and certificate of occupancy

Thinking About an ADU on Your Property?

Start with a free on-site consultation. We check zoning, setbacks and utilities, talk through your goals, and give you a ballpark range before you commit to anything.

Get My Free Consultation

or call 310-367-8527

What to Expect During Your Project

Clear Communication

Weekly updates and one dedicated project manager as your single point of contact.

Budget Transparency

Detailed cost breakdowns with no hidden fees - before or during construction.

Material Support

We help you source quality materials at the right price, delivered on schedule.

Quality Assurance

High-quality materials and multiple checkpoints to ensure craftsmanship at every stage.

Minimal Disruption

We keep your property safe, organized, and clean throughout the entire build.

Permit Management

We handle all city submittals, inspections, and the certificate of occupancy from start to finish.

The investment

What an ADU Can Return

Building an ADU in Los Angeles is one of the strongest property investments available to homeowners today.

$1,500 - $3,500/mo

Potential monthly rental income depending on location, size, and finishes.

20 - 30%

Potential increase in property value for some homeowners in the Greater LA area.

Flexibility

Use it for family, guests, or tenants - and change how you use it over time.

Possible Tax Benefits

Depending on eligibility and usage. Consult your tax advisor for specifics.

Figures are based on market averages and are not guaranteed. Actual results depend on location, rental market, and other factors outside our control.

The design-build advantage
Local expertise

Deep knowledge of Los Angeles ADU regulations, zoning laws, and permit processes.

One team, start to finish

Design, permits, construction, and material support under one roof - no hand-offs, no confusion.

Seamless integration

We build ADUs that complement your existing property in style, materials, and flow.

Transparent process

One dedicated project manager, clear updates, and no surprises from day one to completion.

Serving Los Angeles & the South Bay

We design and build ADUs across Greater Los Angeles, including Santa Monica, Culver City, Manhattan Beach, Redondo Beach, Torrance, Long Beach, Palos Verdes Estates, Rancho Palos Verdes and Beverly Hills.

FAQ

ADU Questions

How long does it take to build an ADU in Los Angeles?

Most ADU projects take 7-15 months from first meeting to move-in: about 1-2 months for design, 2-6 months for permits and 3-9 months for construction, depending on the type and size of the unit.

What types of ADUs do you build?

Detached backyard ADUs, garage conversions, attached ADUs and junior ADUs (JADUs) inside the existing home. We help you choose the option that fits your lot, budget and goals.

Do you handle the design and permits?

Yes. One team handles the site assessment, architectural plans, 3D design, engineering coordination, city permits, construction and final inspections. You deal with one contractor from start to finish.

Can my property have an ADU?

Most single-family lots in Los Angeles can add at least one ADU under California law. During the free consultation we check your lot size, setbacks, utilities and access, and tell you what is possible.

Can I rent out my ADU?

In most cases, yes. Many of our clients build an ADU for rental income, while others use it for family, guests or a home office. We design the layout around how you plan to use it.

How much does an ADU cost?

Cost depends on the type of unit, size, site conditions and finishes. After a free on-site consultation, you get a detailed, no-obligation estimate.

Optima Design and Build is a Los Angeles licensed general contracting firm (CSLB License #1124135) that specializes in designing and constructing custom accessory dwelling units (ADUs) for homeowners across greater Los Angeles, managing the full process from tailored design and 3D rendering through permitting, approvals, and construction to help property owners add living space or rental income potential.

Frequently Asked Questions

What is an ADU and why should I build one in Los Angeles?

An accessory dwelling unit (ADU) is a secondary residential unit built on the same lot as a primary home. In Los Angeles, ADUs are a popular way to add rental income, house family members, or increase property value. California state law and Los Angeles city regulations have significantly streamlined ADU permitting in recent years, making them more accessible than ever for homeowners.

What does Optima Design and Build include in its ADU service?

Optima's ADU service covers custom design tailored to your property and needs, 3D renderings, all permitting and approval coordination with the Los Angeles Department of Building and Safety, material selection, and full construction management. The team handles every step so homeowners have one point of contact throughout the entire ADU project.

How long does it take to build an ADU in Los Angeles?

ADU timelines in Los Angeles vary based on size, type (attached, detached, or garage conversion), and permitting complexity. A garage conversion ADU may take a few months, while a new detached ADU can take six months or longer. Optima provides a detailed pre-construction timeline during the planning phase so homeowners know what to expect.

Do I need a permit to build an ADU in Los Angeles?

Yes. ADUs in Los Angeles require building permits from the Los Angeles Department of Building and Safety. Optima Design and Build manages the entire permitting and approvals process on behalf of the homeowner, including plan submission, corrections, and inspection coordination, ensuring the ADU is fully code-compliant.

Can an ADU generate rental income in Los Angeles?

Yes. A permitted and completed ADU in Los Angeles can be legally rented as a separate residential unit, providing homeowners with a source of rental income. Los Angeles has a high demand for rental housing, and a well-designed ADU can significantly increase both the utility and market value of a property.

Authority Sources

Official resources for ADU regulations and permitting in Los Angeles and California: LADBS ADU Permit Information, California HCD ADU Policy and Resources, Los Angeles City Planning ADU Information.

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