Custom ADU Builder Los Angeles
Compare custom scope, site constraints, model options, finish level, construction sequence, and written pricing before selecting a build approach.
Los Angeles County · California
Los Angeles ADU design & construction
Los Angeles uses LADBS information bulletins alongside City Planning rules. Its Standard Plan Program checks repeatable building designs, while the individual lot still needs zoning and foundation review.
Full-service ADU construction
Custom ADU builder & contractor services in Los Angeles
Start with a custom ADU builder or ADU contractor in Los Angeles, then coordinate design, architecture, engineering, permits, budgeting, construction, inspections, and handoff around the property.
ADU Contractor Los Angeles
Coordinate construction scope, subcontractors, schedule, inspections, site logistics, and closeout around a clearly defined permitted set.
ADU Design Build Los Angeles
A coordinated design-build workflow keeps property review, design, engineering, permitting, budgeting, procurement, and construction aligned.
ADU Design Los Angeles
Develop the floor plan, exterior direction, material selections, functionality, and site fit before committing to engineering and construction.
ADU Architect Los Angeles
Architectural planning can address layout, massing, code constraints, site relationships, and permit drawings where an appropriately licensed professional is required.
ADU Engineer Los Angeles
Engineering coordination can cover structural, foundation, utility, civil, energy, and other disciplines required by the property and permitting authority.
Local planning guide · Reviewed October 2, 2026
What matters for an ADU in Los Angeles
Permitting authority: Los Angeles Department of Building and Safety — ADUs
Official local guidanceLocal rules and design checks
| Topic | Local guidance |
|---|---|
| Current bulletin | Use LADBS Information Bulletin P/BC 2026-150 for the ADU/JADU building guidance linked by the City. |
| Standard-plan review | A listed plan still undergoes property-specific zoning and foundation checks. |
| Older unpermitted units | Bulletin P/BC 2026-161 describes a separate streamlined path for qualifying units built before January 1, 2020. |
Selected local requirements, not a complete zoning determination. Confirm the current rules for your address with the responsible agency.
Fees and budget checks
LADBS separates the initial professional’s standard-plan preapproval review from a homeowner’s site permit. Confirm the design license, site plan-check charges and applicable permit fees individually.
LADBS Standard Plan ProgramHow to start the permit process
Identify the relevant City Planning and LADBS requirements, choose custom drawings or a licensed standard design, and submit the property-specific building package.
Municipal plan catalog
LADBS approved standard-plan catalog
The City maintains a searchable catalog of repeatable ADU designs from licensed professionals. A catalog listing is a plan approval, not a completed project or a City endorsement.
View the original sourceLos Angeles ADU questions
- Can a listed plan bypass foundation review?
- No. LADBS expressly retains site-specific foundation and zoning review.
- Which resource covers an older unpermitted unit?
- Start with Bulletin P/BC 2026-161 and confirm whether the pre-2020 streamlined path applies.
Sources for this guide
- Los Angeles Department of Building and Safety — ADUs
- LADBS Standard Plan Program
- LADBS approved standard-plan catalog
- LADBS unpermitted-unit bulletin
Local sources reviewed October 2, 2026. Historical examples retain their stated dates. Contact ADU California Inc. to confirm project availability; this guide does not establish an office location or property approval.
A useful first review
Separate what is available from what still needs verification.
01
Confirm the property
Start with a complete address and review the available parcel, building, and map context.
02
Identify the unknowns
Keep missing setbacks, easements, utilities, access, hazards, and local requirements visible.
03
Choose the next review
Use the preliminary result to prepare a focused conversation with the required professionals and agencies.
Explore project types
Compare the scope before choosing a solution.
These pages explain the questions each project type introduces. They do not assert that a particular scope is permitted or suitable for your address.
Compare planning footprints
See common ADU sizes before choosing a design.
These model pages are planning references only. They are not a statement that a particular size is allowed or buildable at a Los Angeles address.
California directory
Explore more city guides.
The next useful action
Put your address at the center of the conversation.
The online review is preliminary and is not a permit decision, survey, engineering opinion, construction document, final price, or guaranteed schedule.