3-Bedroom ADU Los Angeles
Plan the Perfect 3-Bedroom ADU With LADU. ADUs Designed Better. Built Smarter.
Build a 3-bedroom ADU that fits your lot, budget, and goals. LADU is your architect-led ADU designer in Los Angeles with flat-fee design and full-service support from feasibility to final inspection.
We handle 3-bedroom ADU design, LADBS permitting, and arrange construction with licensed partners so you get a code-compliant, move-in-ready unit without the hassle.
One Team. One Contract. One Goal.
Call (213) 855-3334 or schedule your free site visit today.
Build a Spacious 3-Bedroom ADU With Smart Design
A 3-bedroom ADU allows for multigenerational living, rental income, and long-term value within California's detached size cap of 1,200 square feet.
Our architects create efficient 3-bedroom floor plans that use every square foot wisely, so bedrooms, a full kitchen, living room, and baths fit comfortably.
Code-ready drawings align with Los Angeles rules from day one, which often means fewer plan check rounds and faster approvals. For smaller lots, two-story 3-bedroom ADU plans can reach 900-1,200 sq. ft. without overwhelming the yard.
Benefits of a 3-Bedroom ADU
Three bedrooms open more options on a typical LA lot. You get privacy for family, flexible long-term rental potential, and stronger resale value.
Our 3-bedroom ADU design process adapts to common Los Angeles use cases, from adult children returning home to grandparents who want independence close by.
- Families that need a separate home with three real bedrooms, a full kitchen, and a comfortable living area.
- Caregivers and multigenerational households that benefit from proximity without sacrificing privacy.
- Long-term renters who value larger layouts near jobs, schools, and transit.
Income Potential From a 3-Bedroom ADU
The ADU 3-bedroom format serves a wide tenant pool across LA. Larger households often seek leases of 30 days or longer, which aligns with Los Angeles rental rules.
A well-planned 3-bedroom ADU often commands stable rent, especially in neighborhoods near transit, schools, or major employers.
3-Bedroom ADU: Value and Flexibility
A legal 3-bedroom ADU can lift property value and offer options as your needs change. Use it for family now, rent it later, or keep it as a future downsizing plan.
Our 3-bedroom ADU plans balance private bedrooms with an open living/kitchen core, so the home feels generous within a 900-1,200 sq. ft. envelope.
Codes, Size, and Costs for a 3-Bedroom ADU
An architect-led approach helps you avoid missteps that slow projects or add rework. We align your 3-bedroom ADU with the Los Angeles Municipal Code and California Government Code from the start and then manage LADBS plan check through permit issuance.
3-Bedroom ADU Size Limits
For Los Angeles, a detached 3-bedroom ADU can be up to 1,200 square feet. That upper limit is the standard cap for detached units under state and local rules. Many 3-bedroom ADU plans land between 900 and 1,200 sq. ft.
Generally, a 1,200-square-foot ADU is more than sufficient for a small family when well designed. LADU tailors the plan type and size to fit your property and goals.
Setbacks and Height for a 3-Bedroom ADU
Detached ADUs commonly need 4 feet side and rear setbacks. Height limits often start at 16 ft. for one-story options. Two-story designs can require extra review and neighborhood context.
Our code study confirms setbacks, height, and building separation early so your design matches the rules.
Parking and Transit
Some projects need one parking space for the ADU. Many do not. Parking is waived for sites near transit and under other state criteria. LADU verifies your parcel's eligibility using official transit maps and local guidance.
If a parking space is required, we integrate it into the site plan using tandem, uncovered, or setback-compliant solutions so plan check stays on track.
ADU Permits and Approvals
3-bedroom ADUs in Los Angeles follow LAMC Section 12.22 A.33 and California Government Code 65852.2. LADU prepares permit-ready drawings and submits to LADBS for plan check.
Our team coordinates corrections with plan examiners and then tracks your application through final approval. The project receives a building permit for construction and later a Certificate of Occupancy for legal use.
Utilities and Fire Safety
Larger ADUs often need new or upsized utility services. Common items include:
- Electrical service upgrades and dedicated subpanels.
- New water and sewer lines or tie-ins sized for added fixtures.
- Gas service checks or all-electric planning to simplify routing.
- Fire safety measures appropriate to the building size and distance to the property lines.
Project scope can trigger fire sprinklers or specific fire-resistance details. LADU coordinates with LA Fire for applicable requirements and folds those notes into the plans.
1,200 Sq. Ft. ADU Cost
The cost for a 1,200 sq. ft. ADU varies across Los Angeles. The 3-bedroom ADU cost drivers include:
- Site work and access: Grading, retaining, utility trenching, and driveway adjustments.
- Structure type: Slab vs. raised foundation, one story vs. two story, and framing details.
- Level of finish: Cabinets, tile, windows, HVAC type, and appliance package.
- Utility upgrades: Electrical service, water meter, sewer capacity, and gas or all-electric strategies.
LADU provides flat-fee design, then arranges construction services through licensed ADU partners who supply detailed, itemized pricing. You get clear drawings for apples-to-apples contractor bids.
3-Bedroom ADU Floor Plans and Layouts
Well-planned 3-bedroom adu floor plans make room for three real bedrooms, a full kitchen, a comfortable living area, and one or two baths. We create 1,200 square foot ADU plans that:
- Group wet rooms for efficient plumbing runs.
- Use pocket or barn doors to save swing space.
- Place windows for privacy from the main home.
- Offer stacked laundry and smart storage.
Two-story 3-bedroom adu plans work well on smaller lots. A compact footprint preserves yard space and can improve privacy between homes.
Our Architect-Led Process for a 3-Bedroom ADU
We guide your 3-bedroom ADU from feasibility to final inspection with one coordinated team to make building an ADU simple.
Site and Zoning Check
- Property survey review and site measure
- Setbacks, height, lot coverage, and floor area checks for your zone
- Parking assessment and transit eligibility review
- Utility capacity review and early fire notes
3-Bedroom ADU Design and Plans
- Schematic layouts and 3-bedroom adu design iterations
- Structural coordination and Title 24 energy documentation
- Interior elevations, window and door schedules, and fixture plans
- Permit-ready documents aligned with LADBS submittal standards
ADU Permits and Approvals
- Application preparation and submittal to LADBS
- Responses to plan check comments and corrections
- Coordination with Planning, Fire, and other agencies as required
- Final permit issuance and handoff for construction
ADU Construction Arranged
LADU does not build in house, but we can arrange construction services through our network of licensed ADU contractor partners. We support you through construction, inspections, and the Certificate of Occupancy. You benefit from vetted local pros with a single, coordinated workflow.
Why Choose LADU for Your 3-Bedroom ADU Plans
Our architect-led method brings code expertise, transparent pricing, and smooth coordination from the first sketch to final inspection.
One Team. One Contract. One Goal.
What Sets Us Apart
- Transparent flat-fee design, so you know your design cost upfront
- Architect-led quality with code-first plans that pass LADBS review more smoothly
- Local permitting experience across Los Angeles for faster approvals
- Stress-free coordination with licensed ADU contractors, arranged by LADU
- Designs that respect your property, privacy, and budget targets
- Thoughtful 3-bedroom ADU floor plans for 900-1,200 sq. ft. ADUs
- One team from feasibility to inspection
Ready to plan your 3-bedroom ADU in Los Angeles?
Call (213) 855-3334 or contact us online today for a free site assessment and a fixed-price design quote.
We Make Building an ADU Simple.
Related Services
Types of ADU Designs
Frequently Asked Questions About 3-Bedroom ADUs
How big can my 3-bedroom ADU be?
In Los Angeles, a detached ADU can be up to 1,200 sq. ft. Many 3-bedroom ADU plans target 900-1,200 sq. ft. to fit bedrooms, living, kitchen, and baths. LADU tailors layouts to your lot and goals.
Do I need parking for a 3-bedroom ADU?
Parking can be waived when the property is near transit or meets other state criteria. If required, one space typically satisfies the rule. LADU checks transit maps, driveway options, and site constraints early to avoid surprises during LADBS plan check.
Can a garage become a 3-bedroom ADU?
Some garages are too small for three bedrooms within the 1,200 sq. ft. cap. A garage conversion can work if the structure, setbacks, and floor area allow a legal plan. LADU evaluates conversion vs. new detached options to hit your 3-bedroom target.
How long does permitting take?
Timelines change based on scope and plan check comments. LADU prepares code-compliant plans to cut extra rounds with LADBS. Certain elements and complete submittals can help. We manage responses until permits are issued and the project is ready for construction.
What is included in LADU's flat-fee 3-bedroom ADU design?
Our flat-fee scope covers feasibility and code checks, schematic layouts, design iterations, structural coordination, and Title 24 energy documentation. We produce permit-ready drawings with interior elevations, window and door schedules, and fixture plans aligned to LADBS standards. We prepare the application, submit it, and coordinate plan check corrections through permit issuance successfully.
Do two-story 3-bedroom ADU plans work on smaller lots?
Yes. Two-story 3-bedroom ADUs can reach 900-1,200 square feet without overwhelming limited yards, preserving space and privacy. Height and neighborhood context may require additional review, so we confirm setbacks, building separation, and allowable height early. Compact footprints often improve circulation while delivering full bedrooms, a kitchen, a living room, and baths.
What utility upgrades and fire measures should I expect?
Larger ADUs often need electrical service upgrades with dedicated subpanels, new or upsized water and sewer lines, and gas service checks or all-electric planning. Depending on size and distances to property lines, sprinklers or fire-resistance details may apply. LADU coordinates with LA Fire and integrates applicable notes into the plans.