Does AB 462 Make Coastal Zone ADUs Faster in Manhattan Beach and Hermosa Beach?

Published August 10, 2026

AB 462 is chaptered law. It puts a 60 day clock on Coastal Development Permit decisions for ADUs, with deemed approval if the deadline passes. That does not remove the permit requirement in Manhattan Beach or Hermosa Beach, it forces a decision inside a window.

The short answer

Yes, AB 462 is chaptered California law, effective October 10, 2025. It requires the agency deciding a Coastal Development Permit for an ADU, whether that is the city or the California Coastal Commission, to approve or deny it within 60 days of a complete application, or the application is deemed approved. It does not eliminate the CDP requirement in Manhattan Beach or Hermosa Beach, and it does not touch the ADU's underlying zoning review.

Last verified: August 10, 2026

Why Manhattan Beach and Hermosa Beach owners need a CDP at all

Both cities sit inside California's coastal zone, which means development, a legal term that includes building an ADU, generally requires a Coastal Development Permit before or alongside the standard building permit. That requirement comes from the California Coastal Act and each city's own Local Coastal Program, the document the Coastal Commission certifies as that city's authority to issue CDPs locally.

A certified Local Coastal Program lets the city issue the CDP itself. Where a city has not certified authority over a given decision, or where an appeal reaches the Commission, the state Coastal Commission is the deciding body. Either way, before AB 462, there was no statutory clock forcing a decision. Applications could sit for months while other steps in the ADU review moved forward, effectively making the coastal permit the pacing item for the whole project.

What AB 462 changes

The bill amends Government Code sections 66328 and 66329, the ADU statute framework, to insert coastal specific timing rules. Three provisions matter for an owner:

A 60 day decision clock. Once an application for a Coastal Development Permit for an ADU is complete, the deciding agency, whether that is the local government or the Coastal Commission, must approve or deny it within 60 days.

Deemed approval as the enforcement mechanism. If the Coastal Commission does not act within that 60 day window, the statute treats the application as approved by default. That is the teeth in the law. It does not just set an aspirational timeline, it converts inaction into a yes.

No public hearing requirement. Local governments are not required to hold a public hearing on a coastal ADU permit application, which removes a common source of scheduling delay tied to hearing calendars and notice periods.

One carve out for new construction. If the ADU's CDP is filed alongside a CDP for a new primary dwelling on the same lot, the Commission may delay the ADU decision until it resolves the primary dwelling's permit. That prevents an owner from using the ADU clock to force a faster answer on a much bigger new build project bundled into the same application.

What it does not change

This is the part worth being precise about, because "faster" and "easier" are not the same thing.

• The CDP requirement itself still applies. AB 462 does not exempt ADUs from coastal permitting. It regulates how long the decision can take, not whether a decision is required.
• It does not override local zoning, height, or setback standards. Those still apply through the city's normal ADU review, running in parallel with the coastal review.
• It does not change what counts as a complete application. The 60 day clock starts only once the application is complete. A city or the Commission can still request missing materials before the clock starts running, which is a normal and legitimate part of any permit process.
• It is silent on appeal timing after a decision issues. The bill's own text exempts ADU CDP decisions from the standard Coastal Act appeal process, but confirm with the deciding agency how any objection or reconsideration works in practice for your specific application.

The practical read for Manhattan Beach and Hermosa Beach owners

| Step | What changed after AB 462 | What stayed the same |

|---|---|---|

| Do you need a CDP for an ADU in the coastal zone | No change, still required | Still required |

| Public hearing before a decision | No longer required | N/A |

| Time from complete application to decision | Capped at 60 days, deemed approved if missed | N/A |

| Zoning, height, setback review | No change | Runs separately under city ADU rules |

| ADU paired with a new primary dwelling on the same lot | Commission may delay the ADU decision until the primary dwelling CDP resolves | N/A |

The net effect for a South Bay owner filing a standalone ADU CDP is a hard ceiling on how long the coastal review can drag, once your application is actually complete. The friction that remains is upstream of that clock: getting the application to "complete" status, and running the parallel city zoning review that the CDP does not replace.

FAQ

Is AB 462 actually law, or still a bill?

It is chaptered law. The Governor approved it October 10, 2025, and it took immediate effect as an urgency statute.

Does AB 462 mean I no longer need a Coastal Development Permit for my ADU in Manhattan Beach or Hermosa Beach?

No. You still need the CDP. The law sets a 60 day deadline for the decision on that permit, it does not remove the permit requirement.

What happens if the Coastal Commission misses the 60 day deadline?

The application is deemed approved by operation of law. That deemed approval provision is what gives the deadline force.

Does the 60 day clock start when I submit my application?

It starts once the application is deemed complete. If the city or Commission requests additional materials first, the clock does not start until the application is complete.

Will there be a public hearing on my coastal ADU permit?

Local governments are not required to hold one under AB 462, which is one of the mechanisms behind the faster timeline.

Does this affect the separate zoning approval for my ADU?

No. Zoning, height, and setback review proceed under the city's normal ADU process, independent of the coastal permit timeline.

This article summarizes a specific state statute and general coastal permitting concepts, not legal advice for your property. Confirm current CDP procedures, fees, and application completeness requirements with the Manhattan Beach or Hermosa Beach Community Development Department, or the California Coastal Commission, and consult a land use attorney for anything time sensitive.

Topics: compliance, ADU, Coastal Development Permit, AB 462, Manhattan Beach, Hermosa Beach

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