South Bay · LA County

ADU permits in Manhattan Beach

Zip codes:90266

Manhattan Beach is a coastal city of about 35,000 in the South Bay, between Hermosa Beach and El Segundo. The city runs its own building and planning departments, with an Accessory Dwelling Unit (ADU) ordinance shaped heavily by California Coastal Act jurisdiction. Lots are small by Los Angeles standards (the Sand Section parcels are typically 30 feet wide), which makes ADU placement a real puzzle.

Independent city — not LADBS

Manhattan Beach runs its own building department. Permits go through Manhattan Beach Community Development Department ↗, not LADBS. The PermitPathLA wizard's LA City-specific outputs don't apply directly — but the Manhattan Beach ordinance breakdown below covers what does.

Manhattan Beach permit page ↗Cost estimator

Manhattan Beach by the numbers

Rounded figures from the 2020 US Census, LA County Assessor parcel data, and the city's own published reports. Estimates only — your specific lot can vary widely.

Population

35,000

2020 Census

Single-family homes

~11,000

LA County Assessor

Median lot size

4,500 sqft

Approximate

Median home value

$3.2M

Zillow / Redfin

What makes Manhattan Beach different

Manhattan Beach is split into three areas: the Sand Section (west of Highland Ave, tightest lots, full Coastal Zone), the Tree Section (east of Sepulveda, larger lots, partial Coastal Zone in the western portion), and the Hill Section (mid-city, larger lots, mostly outside the Coastal Zone). Coastal Zone parcels require a Coastal Development Permit on top of the city building permit, which adds 3–9 months and $1K–$3K.

Manhattan Beach ADU ordinance — the rules that apply

Last verified: 2026-05-12

The current ADU rules in Manhattan Beach, sourced from the city's published ordinance and verified against CA Government Code §65852.2 (which preempts local rules stricter than state baselines). When you see "state default," that means the city can't reduce below this number under state law.

Max detached ADU size	1,200 sqft (state default) Cannot be reduced under state preemption.
Max ADU height	16 ft / 18 ft with second-story setbacks
Setbacks	4 ft side / 4 ft rear (state minimum)
Coastal Development Permit	Required for any parcel in the Coastal Zone Adds 3–9 months and $1K–$3K. Sand Section + western Tree Section parcels are affected.
Floor Area Ratio (FAR) cap	Combined FAR for primary + ADU is capped per zone The Sand Section's 0.65 FAR can constrain ADU size when the primary house is already large — this is the most common Manhattan Beach ADU bottleneck.
Local processing time	60 days from complete submittal (state-mandated) Excludes Coastal Development Permit timeline if applicable.
Pre-approved standard plans	None city-specific

Source: Manhattan Beach Community Development Department ↗

Active overlays + extra rules in Manhattan Beach

City overlays + state-level designations that hit a meaningful share of Manhattan Beach parcels. Each affects what you can build, how long it takes, or how much it costs.

California Coastal Zone

~40% of parcels

All Sand Section parcels and the western Tree Section sit in the Coastal Zone, requiring a Coastal Development Permit from the city (with appeal jurisdiction to the California Coastal Commission). Adds 3–9 months and $1K–$3K.

Sand Section FAR cap

~25% of parcels

The 0.65 floor-area ratio on Sand Section parcels often caps total buildable area below what state ADU law would otherwise allow. Most Sand Section ADUs end up smaller than 1,200 sqft simply because the FAR runs out.

Watch-outs specific to Manhattan Beach

Patterns we see across Manhattan BeachADU permits. None are dealbreakers — they're just the things people get wrong most often.

01
Coastal Development Permit timing is the schedule risk, not plan check
Manhattan Beach's 60-day plan check is usually on-time for ADUs. But if you're in the Coastal Zone, the Coastal Development Permit runs in parallel and can take 3–6 months on its own. The CDP can also be appealed to the California Coastal Commission, which adds another 49 days. Plan your construction start around the CDP, not the building permit.
02
Sand Section narrow lots constrain ADU placement
Typical Sand Section lots are 30 ft × 90 ft. After 4 ft side setbacks and the primary house, there's often very little width left for a detached ADU. Attached ADUs or above-garage JADUs are usually the only feasible options in the Sand Section.
03
MBUSD is small but well-funded — school fees apply
Manhattan Beach Unified charges school facility fees on new ADUs over 500 sqft. Rates are reviewed annually but typically run $4–6/sqft.

Plans that fit Manhattan Beach lots

Manhattan Beachdoesn't maintain a city-specific pre-approved plan library the way the Los Angeles Department of Building and Safety (LADBS) does. California Department of Housing and Community Development (HCD)-approved prefab (which bypasses local plan check) and custom designer plans are the main paths:

Connect Homes

ADU14 · ADU15

HCD-certified — skips local plan check.

View Connect Homes →

Cover

ADU77 · ADU78 · ADU79

HCD-certified — skips local plan check.

View Cover →

Amenities + civic services in Manhattan Beach

Parks, libraries, and the school district that serve the area. Context that matters for renter appeal, family relocation, and long-term resale.

Parks + sports

Polliwog Park

Manhattan Beach Blvd, Tree Section

Largest park in the city. Manhattan Beach Botanical Garden + amphitheater hosting the summer concerts series.

Amphitheater
Playground
Picnic
Trails
Fishing

Manhattan Beach Pier + Strand

Foot of Manhattan Beach Blvd

Iconic 928 ft pier. Hosts the AVP Manhattan Beach Open (international beach volleyball) every August.

Annual AVP Manhattan Beach Open

Volleyball

Live Oak Park

Valley Drive, Tree Section

Community park with tennis, baseball, and a community center.

Tennis
Baseball
Playground
Community Center
Picnic

Bruce's Beach

26th Street + Highland Ave

Historic park returned to the Bruce family descendants in 2022 after the city restituted ocean-view land seized in 1924. Significant civil-rights landmark.

Picnic

Libraries

Manhattan Beach Library
LA County Library
Highland Ave (Civic Center)

Public schools

School assignments vary by exact address. The district + notable schools below cover most of the area.

District

Manhattan Beach Unified School District (MBUSD)

Notable schools in the area

Mira Costa High School
Manhattan Beach Middle School
Pacific Elementary

MBUSD consistently ranks among California's highest-performing public districts and is a primary driver of Manhattan Beach home premiums.

Getting around Manhattan Beach

Beach-cruiser and walkable along Manhattan Beach Blvd + the Strand. Car-dependent for most errands east of Sepulveda.

Transit + walkability

Bus lines

Metro 130 (Redondo Beach to LAX)
Metro 232 (LAX to Long Beach)
Beach Cities Transit Line 109

Nearest rail

Metro C Line — Aviation/LAX Station (about 4 miles north)

Walkability

Sand Section + downtown grid are highly walkable; Tree + Hill sections are car-dependent.

Nearby airports

Distance + type for each major Los Angeles-area airport reachable from Manhattan Beach. Useful for travel, commute, and any flight-path noise concerns on specific parcels.

Los Angeles International (LAX)
~3 mi
International
Directly under the LAX south-runway departure path. Aircraft noise is a real, year-round factor — particularly in north Manhattan Beach. Worth a site visit at peak departure hours (7-10am, 4-8pm) before committing.
Hawthorne Municipal Airport (HHR)
~5 mi
General aviation
Small GA field; minimal noise impact on Manhattan Beach. SpaceX HQ is adjacent.
Long Beach Daugherty Field (LGB)
~15 mi
Regional / domestic

Community + landmarks in Manhattan Beach

Annual events, landmarks, and the places that anchor the area's identity. Context for renter appeal and long-term resale.

Annual events

AVP Manhattan Beach Open
Mid-August (3 days) · since 1960
Premier US beach volleyball tournament. Held at the Manhattan Beach Pier since 1960 — one of the oldest beach volleyball events in the world.
Source ↗
Manhattan Beach Pier Lighting + Holiday Fireworks
First weekend of December
Annual pier lighting ceremony with fireworks display over the ocean.
Source ↗
Hometown Fair
Early October (weekend) · since 1972
Long-running community fair on Manhattan Beach Blvd, hosted by the local volunteer Hometown Fair Association.
Source ↗

What makes Manhattan Beach Manhattan Beach

Landmark

Manhattan Beach Pier

Built 1920, the city's defining feature. Roundhouse Aquarium at the end.

Walkable district

Downtown Manhattan Beach

Manhattan Beach Blvd between Highland and Valley — small grid of restaurants, shops, and the historic Pier-side commercial district.

Frequently asked questions about Manhattan Beach ADUs

›Can I build an ADU in Manhattan Beach?

Yes. Manhattan Beach allows ADUs under its local ordinance, aligned with California Government Code §65852.2 (the state baseline that preempts overly-strict local rules). Most single-family lots can host one ADU plus one JADU. Permits go through Manhattan Beach Community Development Department, not LADBS — see the ordinance table above for the specific rules.

›How does Manhattan Beach differ from LA City for ADU permits?

Three main differences: the permit agency (Manhattan Beach Community Development Department vs. LADBS), the local ordinance details (each city has some flexibility above the state baseline), and the timeline (some cities are faster, some slower than LA's 60-day plan check). See the ordinance breakdown above for the specifics on each.

›How much does it cost to build an ADU in Manhattan Beach?

Median home value in Manhattan Beach is around $3.2M, which usually means lot economics support a quality ADU build of $200K–$400K all-in. Hillside, coastal, or VHFHSZ lots add 7–25% on top. HCD-prefab units (Connect Homes, Cover, Plant Prefab) bypass local plan check entirely and typically run $190K–$350K turnkey.

›Does Manhattan Beach have pre-approved standard plans like LA's YOU-ADU?

No. Unlike LADBS, Manhattan Beach does not maintain a city-specific pre-approved plan library. The two faster paths are an HCD-approved prefab (factory-certified, skips local plan check) or a custom designer drawing for your lot. The slower path is a fully custom architect-led design.

›Will the PermitPathLA wizard work for my Manhattan Beach address?

Partially. The wizard's feasibility check pulls real overlay data for any LA County address. For Manhattan Beach, the wizard surfaces the right city planning link instead of an LADBS workflow. Full Manhattan Beach-specific permit-step walkthroughs are on the roadmap.

Ready to start your Manhattan Beach project?

Permit submittals for Manhattan Beach go directly through Manhattan Beach Community Development Department. Our address checker is currently optimized for City of Los Angeles addresses, so for Manhattan Beach we point you straight at the city.

Open the Manhattan Beach permit page ↗