ADU Construction in Los Angeles County & the San Fernando Valley
Safeway Construction plans and builds ADUs and garage conversions in Los Angeles County. We review the property, intended use and budget, then coordinate the agreed design, permit and construction work. Start with the address jurisdiction and site conditions before committing to a layout or construction date.
Planning an ADU in Los Angeles County
Verify the address jurisdiction
Confirm whether your parcel is in the City of Los Angeles, an independent city or unincorporated Los Angeles County. LADBS handles building permits for City of Los Angeles properties; other jurisdictions use their own agencies. Prepare the site plan, design and engineering, respond to plan-check comments and confirm permit issuance and utility requirements before scheduling construction. A standard or preapproved plan still needs site-specific review.
Check size and site constraints
There is no single size limit that applies to every property and ADU approval pathway. State law protects qualifying 800-square-foot ADUs from certain local development limits. Local size caps generally cannot be below 850 square feet, or 1,000 square feet for a unit with more than one bedroom. A 1,200-square-foot design still needs the applicable local and site review. JADUs are limited to 500 square feet. Existing-building conversions have different rules from new construction.
Separate permit and build stages
Plan design, agency review, utility coordination, construction and final approval as separate stages. California law generally gives agencies 15 business days to assess application completeness and 60 days to approve or deny a qualifying complete application on a lot with an existing dwelling, subject to statutory delay provisions. Those deadlines are not a total project schedule. Safeway prepares a construction schedule after the scope, permits, materials and utility work are understood.
Plan the intended use
Standard ADUs do not have an owner-occupancy requirement under current state law. For a JADU that shares sanitation facilities with the main home, an owner generally must live in one of the units; a JADU with separate sanitation facilities does not have that requirement. Rental terms longer than 30 days apply to JADUs and ADUs approved under Government Code 66323. Confirm the unit-specific rental restrictions and any local registration requirements before advertising it.
Design illustration; not a verified Safeway project photograph.
Your Los Angeles County ADU Builder
We serve Los Angeles County communities including the San Fernando Valley, Calabasas, Agoura Hills and Santa Clarita. Many Valley neighborhoods use City of Los Angeles agencies; independent cities and unincorporated properties use different review paths. Call (805) 222-6544 to confirm coverage and your property jurisdiction.
A detached unit, attached addition and garage conversion involve different structural and utility work. We compare those options against the existing site rather than assuming every lot supports the same plan.
Design, engineering, permits, construction, allowances and exclusions should be clear in the written proposal. The estimate and schedule follow the scope; rental income and resale value are not construction guarantees.
How Los Angeles County ADU Permits Work
City of Los Angeles
LADBS publishes ADU guidance and a standard-plan program. Even a preapproved design needs review for the actual site, zoning and foundation. Resolve plan-check comments and utility requirements before scheduling work.
Independent cities
Calabasas, Agoura Hills and Santa Clarita use their own local review routes under state law. Confirm the parcel and current agency checklist instead of assuming a universal 15- or 30-day approval.
Unincorporated Los Angeles County
A county-area mailing address can sit outside city limits. Verify the parcel jurisdiction with the county before using city requirements or selecting a permitting route.
From approval to occupancy
Permit decisions, permit issuance, utility work, construction inspections and final occupancy clearance are separate steps. A review deadline is not permission to begin work without the required issued permits.
Types of ADUs We Build
Compare the construction options below, then confirm which approval pathway and design suit your property. SB 9 development is a separate service scope.
Detached ADU
A separate dwelling with its own kitchen and bathroom. Review the foundation, utility route, access and permitted size before choosing a plan.
Attached ADU
An addition connected to the main home. Structural ties, roof details, fire separation and utility capacity are part of the scope.
Garage Conversion
A conversion of an existing garage into permitted living space. The slab, framing, moisture protection and services may need upgrades; retaining a shell does not guarantee a lower total.
Junior ADU (JADU)
A compact unit within a qualifying single-family residence, including attached garage space. Access, an efficiency kitchen and sanitation arrangements need review.
SB 9 Lot Split
A subdivision and housing-development pathway distinct from an ADU permit. Parcel eligibility, subdivision conditions and the proposed units need review before making a construction commitment.
ADU and JADU planning
State law allows qualifying combinations of units on single-family properties. The existing buildings and applicable approval pathway determine which combination can be approved; a combined floor-area promise is not enough.
ADU Layouts to Discuss
These layout sizes are starting points for a site review. Use the calculator to explore a preliminary Safeway planning range, then confirm the proposed scope and agency requirements.
Studio ADU
400 sq ft concept
Model your scope
An example layout size, subject to site and permit review. Choose construction type and finishes in the calculator.
Get Estimate1-Bedroom ADU
600 sq ft concept
Model your scope
Allow room for a separate bedroom, kitchen and bathroom; laundry and access choices affect the scope.
Get Estimate2-Bedroom ADU
900 sq ft concept
Model your scope
Compare the usable layout and site requirements before choosing a larger unit. Agency fees need property-specific review.
Get EstimateGarage Conversion
Existing structure reviewed
Model your scope
A slab, framing and utility evaluation comes before assuming the existing building can be reused.
Get EstimateHow ADU Construction Works
From your first call to handing over the keys, here is exactly what to expect when you build an ADU with Safeway Construction.
Free Consultation
We visit your property, assess the site, discuss your goals, and evaluate what your lot allows under California state law and LA County or LA City regulations.
Design & Plans
Our team creates architectural drawings and 3D renderings of your ADU. You approve the design before we move forward.
Permits
We coordinate the agreed permit applications with LADBS or the appropriate city or county agencies and respond to plan-check comments.
Construction
Foundation to finish, our crew builds your ADU. Regular progress updates and a construction schedule that accounts for inspections, materials and utility work.
Final Inspection & Handover
City inspector signs off. We do a final walkthrough with you, address any punch list items, and hand over the keys.
Why Choose Safeway for Your ADU
LA County & City of LA Permit Expertise
We establish whether the property uses LADBS, an independent city or county agencies, then organize the agreed application work and responses to plan-check comments.
Design-Build Under One Roof
From initial design concepts and 3D renderings to construction and final walkthrough, everything is managed by one team. The proposal identifies responsibilities, allowances and decisions that affect the estimate and schedule.
Full-Service From Plans to Keys
We handle every aspect of the ADU permitting process, from architectural plans and engineering documents to filing applications and coordinating inspections. Owner signatures and any required owner participation are identified during planning.
20+ Years, 5.0 Stars
Over two decades of residential construction experience. Licensed, insured, and rated 5.0 stars on Google. We bring that same commitment to quality, transparency, and customer satisfaction to every ADU project.
Planning an ADU Budget in Los Angeles County
These are rounded Safeway calculator examples, not Los Angeles County market averages or quotes. All use ZIP 93065, standard finishes, one bedroom and bathroom, a flat site, laundry and a private entrance, with no selected separate meter or septic work. Detached examples include a provisional solar allowance. Change the inputs in the ADU cost calculator to explore your own scope.
400 sq ft garage conversion
$130,000–$180,000
600 sq ft detached ADU
$240,000–$330,000
1,000 sq ft detached ADU
$355,000–$485,000
Agency amounts in the model are planning allowances, not current invoices. Larger-unit proportional impact fees are not calculated; actual site work, engineering, utility requirements and agency assessments need a property review. Attached ADUs and JADUs need their own scope and estimate.
Factual review: September 16, 2026. Check the current CalHFA funding notice, HCD ADU handbook, state permit review rules and local guidance from LADBS and Santa Clarita Planning. Confirm the current requirements for your actual parcel before proceeding.
Frequently Asked Questions About Los Angeles County ADUs
How much does it cost to build an ADU in Los Angeles County?
Use the ADU calculator for a preliminary Safeway planning range based on your size, finish and site selections. It is not a citywide average or a construction quote. Existing foundations, utility capacity, access, engineering and agency fees can change the scope. A written estimate follows a property review; grants and rental income are not assumed.
What areas of Los Angeles County do you serve?
We serve Los Angeles County communities including the San Fernando Valley, Calabasas, Agoura Hills and Santa Clarita. Many Valley neighborhoods use City of Los Angeles agencies; independent cities and unincorporated properties use different review paths. Call (805) 222-6544 to confirm coverage and your property jurisdiction.
How does the LA City ADU permit process work?
Confirm whether your parcel is in the City of Los Angeles, an independent city or unincorporated Los Angeles County. LADBS handles building permits for City of Los Angeles properties; other jurisdictions use their own agencies. Prepare the site plan, design and engineering, respond to plan-check comments and confirm permit issuance and utility requirements before scheduling construction. A standard or preapproved plan still needs site-specific review.
How long does an ADU project take in Los Angeles County?
Plan design, agency review, utility coordination, construction and final approval as separate stages. California law generally gives agencies 15 business days to assess application completeness and 60 days to approve or deny a qualifying complete application on a lot with an existing dwelling, subject to statutory delay provisions. Those deadlines are not a total project schedule. Safeway prepares a construction schedule after the scope, permits, materials and utility work are understood.
Can I rent out my ADU in Los Angeles County?
Standard ADUs do not have an owner-occupancy requirement under current state law. For a JADU that shares sanitation facilities with the main home, an owner generally must live in one of the units; a JADU with separate sanitation facilities does not have that requirement. Rental terms longer than 30 days apply to JADUs and ADUs approved under Government Code 66323. Confirm the unit-specific rental restrictions and any local registration requirements before advertising it.
What is the maximum ADU size in Los Angeles County?
There is no single size limit that applies to every property and ADU approval pathway. State law protects qualifying 800-square-foot ADUs from certain local development limits. Local size caps generally cannot be below 850 square feet, or 1,000 square feet for a unit with more than one bedroom. A 1,200-square-foot design still needs the applicable local and site review. JADUs are limited to 500 square feet. Existing-building conversions have different rules from new construction.
Is an SB 9 lot split the same as an ADU permit?
No. SB 9 lot splits and two-unit developments use a separate approval path with parcel, zoning, site and occupancy conditions. Do not assume a property qualifies or that an ADU approval authorizes a subdivision. Ask the relevant planning agency to review the parcel and proposed combination before budgeting for a lot split.
Is the CalHFA ADU grant currently available?
As checked September 16, 2026, CalHFA reports that ADU grant funds have been fully reserved since December 28, 2023. Do not subtract a grant from your budget unless funding is confirmed for your project. Check the official program page for any future reopening.
ADU Construction by Los Angeles County City
Serving 13 cities and neighborhoods across Los Angeles County and the San Fernando Valley.
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