Same zip, different jurisdiction: this page covers LA County Public Works (DPW). The same zip code(s) also cover parts of Calabasas (Calabasas (its own permits)), Hidden Hills (Hidden Hills (its own permits)) and Agoura Hills (Agoura Hills (its own permits)). Verify your parcel's jurisdiction before filing, different agencies, different rules.
Santa Monica Mountains · LA County (Unincorporated)
ADU permits in Malibu Lake
Zip codes:9130191302
Malibu Lake is a small premium private-lake unincorporated community of about 600 people in the Santa Monica Mountains, between Agoura Hills and Malibu. It is not a city. Building permits run through Los Angeles County Public Works (Building & Safety). Centered around a 60-acre private artificial lake (created 1922 by the Malibu Lake Mountain Club). Universal Very High Fire Hazard Severity Zone (VHFHSZ) coverage + private-lake-association architectural review define the construction context.
Unincorporated LA County, not LADBS
Malibu Lake is unincorporated territory. Building permits go through LA County Public Works (Building & Safety) ↗ under LA County Code Title 22, not the Los Angeles Department of Building and Safety (LADBS). Our address checker pulls real feasibility data for any LA County address; the Malibu Lake-specific permit pathway is detailed below.
Malibu Lake by the numbers
Rounded figures from the 2020 US Census, LA County Assessor parcel data, and LA County DPW permit records.
Population
600
2020 Census
Single-family homes
~220
LA County Assessor
Median lot size
14,000 sqft
Approximate
ADU permits filed 2025
~4
Source: HCD 2025 total (1,278) distributed proportionally across 2024 per-area shares. 2024: 5.
What makes Malibu Lake different
Malibu Lake is a private-lake community organized around the 1922-founded Malibu Lake Mountain Club. The Mountain Club maintains private architectural review on top of LA County's permit process. The 2018 Woolsey Fire destroyed dozens of Malibu Lake homes, rebuild has been ongoing. Permits run through LA County DPW Building & Safety via EPIC-LA.
LA County ADU rules for Malibu Lake
Last verified: 2026-04-15
Current LA County rules from Title 22 of the County Code, as applied to Malibu Lake. State preemption (Gov Code §§ 66310-66342) means the county can't reduce below the state baseline. We note where that applies.
| Max detached ADU size | 1,200 sqft (state default) |
| Max ADU height | 16 ft / 18 ft with second-story setbacks |
| Setbacks | 4 ft side / 4 ft rear (state minimum) |
| Permitting agency | LA County Public Works (Building & Safety) |
| Fire-hazard construction | Chapter 7A required (universal VHFHSZ) |
| Private architectural review | Malibu Lake Mountain Club architectural review required for exterior changes |
| Local processing time | 60 days from complete submittal (state-mandated) |
Active overlays + extra rules in Malibu Lake
LA County overlays + state-level designations that hit a meaningful share of Malibu Lake parcels.
Very High Fire Hazard Severity Zone (VHFHSZ)
~100% of parcelsUniversal. Chapter 7A construction + extensive defensible space.
Mountain Club architectural review
~100% of parcelsPrivate 1922-founded Malibu Lake Mountain Club requires architectural review of exterior-visible changes.
Woolsey Fire 2018 burn perimeter
~95% of parcelsMost of Malibu Lake was within the 2018 Woolsey Fire burn perimeter. Active rebuild context.
Watch-outs specific to Malibu Lake
- 01
Malibu Lake Mountain Club architectural review is mandatory
Almost every Malibu Lake parcel is a Mountain Club member. The Club maintains private architectural review on top of LA County's permit process. Get Mountain Club scoping done before drafting plans.
- 02
Woolsey Fire 2018 rebuild context heavy
The 2018 Woolsey Fire destroyed dozens of Malibu Lake homes. Many parcels are mid-rebuild or recently rebuilt. Insurance + reconstruction-permit context is dominant.
- 03
Septic + lake-water systems
Most parcels are on septic. Some use Malibu Lake itself for non-potable water; potable water is well or trucked. System verification required.
Need a person, not a wizard?
Routes that fit Malibu Lake
Based on what we know about Malibu Lake, these are the lead types that usually make sense here. Pick whichever fits your situation. All free, no obligation.
Rebuild context
Rebuilding in Malibu Lake?
If your primary residence was lost in a recent fire, you can permit the primary rebuild plus an Accessory Dwelling Unit (ADU) concurrently on an expedited track. We can connect you with contractors who've done post-fire rebuilds in Malibu Lake and understand the Los Angeles County Recovery permitting program.
See rebuild-experienced contractors →Complex permit context
Request a Malibu Lake permit referral
Coastal, hillside, historic, fire-zone, or multi-overlay parcels in Malibu Lake usually mean a permit expediter pays for itself in saved months. We work with affiliated Los Angeles permit expediters and expeditors (both spellings) who've handled Malibu Lake projects.
Complex permit context
Request a Malibu Lake permit referral
Coastal, hillside, historic, fire-zone, or multi-overlay parcels in Malibu Lake usually mean a permit expediter pays for itself in saved months. We work with affiliated Los Angeles permit expediters and expeditors (both spellings) who've handled Malibu Lake projects.
Talk to our financing broker
Want someone to walk you through your options?
Our in-house broker has 30+ years in LA mortgage and ADU financing. He'll lay out HELOC, construction-to-perm, and ADU-specific products like Renofi against your situation, free, no obligation.
Also ask about the state's CalHFA ADU Grant Program (up to $40,000 for income-qualified homeowners, pre-development costs only). Funding releases in rounds that have historically exhausted within days to weeks, check calhfa.ca.gov/adu for current status before counting on it.
Talk to our financing broker
Want someone to walk you through your options?
Our in-house broker has 30+ years in LA mortgage and ADU financing. He'll lay out HELOC, construction-to-perm, and ADU-specific products like Renofi against your situation, free, no obligation.
Also ask about the state's CalHFA ADU Grant Program (up to $40,000 for income-qualified homeowners, pre-development costs only). Funding releases in rounds that have historically exhausted within days to weeks, check calhfa.ca.gov/adu for current status before counting on it.
Amenities + civic services in Malibu Lake
Parks, libraries, and the school district that serve the area. Context that matters for renter appeal, family relocation, and long-term resale.
Parks + sports
Malibu Lake itself
Central community
60-acre private artificial lake (created 1922). Member-only fishing + boating.
- Fishing
Public schools
School assignments vary by exact address. Performance levels below are from the official California School Dashboard, California's official accountability system uses colored levels (blue highest, red lowest) rather than 1-10 numeric scores.
District
Las Virgenes Unified School District
Getting around Malibu Lake
Car-only mountain community.
Transit + walkability
Walkability
Not walkable, private-lake mountain community.
Nearby airports
Distance + type for each major Los Angeles-area airport reachable from Malibu Lake. Useful for travel, commute, and any flight-path noise concerns on specific parcels.
Van Nuys Airport (VNY)
~18 miGeneral aviation
Camarillo Airport (CMA)
~16 miGeneral aviation
Community + landmarks in Malibu Lake
Annual events, landmarks, and the places that anchor the area's identity. Context for renter appeal and long-term resale.
What makes Malibu Lake Malibu Lake
Private club + landmark
Malibu Lake Mountain Club
1922-founded private mountain club. Built the original Malibu Lake dam + clubhouse. Long-running entertainment-industry membership.
Nearby areas to Malibu Lake
Other Los Angeles-area pages worth a look. Each one runs different Accessory Dwelling Unit (ADU) rules depending on jurisdiction, we show you what changes when you cross a city or county line.
LA County unincorporated
Cornell →
Premium Santa Monica Mountains unincorporated community. LA County jurisdiction + universal VHFHSZ + Coastal Zone proximity + post-Woolsey-Fire (2018) and Palisades-Fire (2025) rebuild context shape the Accessory Dwelling Unit (ADU) calculus.
LA County unincorporated
Calabasas Highlands →
Premium Santa Monica Mountains unincorporated community adjacent to Calabasas. LA County (not Calabasas city) jurisdiction + universal VHFHSZ + post-Woolsey/Palisades-Fire rebuild context shape the Accessory Dwelling Unit (ADU) calculus.
LA County unincorporated
Topanga →
Multi-acre canyon parcels with strong Westside-adjacent home values support generous Accessory Dwelling Unit (ADU) footprints. The trade-offs are real: Very High Fire Hazard Severity Zone (VHFHSZ) construction citywide, a Coastal Development Permit (CDP) on the southern parcels, and septic-system capacity often dictating the build size.
Frequently asked questions about Malibu Lake ADUs
›Can I build an ADU in Malibu Lake?
Yes. Malibu Lake allows ADUs under LA County Code Title 22, aligned with California Gov Code §§ 66310-66342. Most single-family lots can host one ADU plus one JADU. Permits go through LA County Public Works (Building & Safety), not LADBS, since Malibu Lake is unincorporated territory rather than a city.
›Why does Malibu Lake use LA County rules instead of LA City rules?
Malibu Lake is unincorporated. It's never been formally incorporated as its own city, so LA County serves as the local government. Building permits, zoning, sheriff, libraries (in many cases), and most other services run through county departments rather than city ones.
›Where do I submit my Malibu Lake ADU permit?
Online via LA County's EPIC-LA portal, or in-person at the LA County Public Works Building & Safety counter in Alhambra (900 S. Fremont Avenue). The EPIC-LA online portal handles most ADU submittals end-to-end, so you rarely need to visit in person.
›How long does the ADU permit process take in Malibu Lake?
LA County DPW targets the state-required 60-day plan check for ADUs from a complete submittal. Hillside, VHFHSZ, or environmental-review parcels can extend timelines by 4 to 12 weeks. Malibu Lake-specific overlays may add additional time. See the watch-outs above.
›Are LA County's pre-approved ADU plans free?
Yes. LA County maintains three pre-approved standard ADU plans (Plans A, B, and C) usable in any unincorporated area, including Malibu Lake. They're free to use, similar to LADBS's YOU-ADU program. The trade-off is reduced design flexibility, but for a fast, low-cost permit path they're the strongest option.
Ready to see what your Malibu Lake lot can do?
Our free address checker pulls real zoning, overlay, and parcel data for any Los Angeles County address, including unincorporated Malibu Lake. Start there and we'll surface what applies to your specific lot.
Check your address →Reviewed by Yair Harpaz, Founder, PermitPathLA. California DRE-licensed broker with 30+ years of Los Angeles real estate and mortgage industry experience.
Malibu Lake ordinance data last reviewed .
See an error or stale rule? corrections@permitpath.la
Primary sources: LA County DPW ADU info · LA County Code Title 22