Field notes / Homeowner guide
Planning a new home in California's coastal zone
Inside the coastal zone, most development needs a coastal development permit in addition to other local permits. Who issues it depends on whether the local coastal program is certified for that area. Many coastal-city parcels are outside the zone; check yours.
Written · Revised · KB Remodeling
In brief
Confirm whether the parcel is in the coastal zone, which agency issues the coastal development permit, and how that review fits before building plan check.
01
Is the parcel in the coastal zone?
The coastal zone boundary does not follow city limits. Some cities, such as Hermosa Beach, lie only partly inside it. Check the parcel with the city or the Coastal Commission's maps.
Ask yourself
- Is this exact parcel inside the coastal zone boundary?
02
What the Coastal Act requires
Public Resources Code section 30600 requires anyone undertaking development in the coastal zone to obtain a coastal development permit, in addition to other permits required by law, except as the Act provides.
Ask yourself
- Does the city treat the new house as development requiring a coastal permit, or an exemption?
03
Who issues the permit
Local governments in the coastal zone prepare local coastal programs (LCPs) for Coastal Commission certification. The Commission reports that as of 2022 about 75% of LCP segments were certified, covering about 88% of the coastal zone's area, with local governments issuing coastal development permits there. Elsewhere, or for areas the Commission retains, the path can differ. Ask the city which applies.
Ask yourself
- Is the area's LCP certified?
- Can a local decision be appealed to the Commission here?
04
Sequence it with design
Coastal review can shape siting, height, views, drainage and public access questions, so raise it before design is fixed. Ask the city how coastal review is sequenced with its own planning approvals and building plan check.
Ask yourself
- Which comes first: coastal permit, planning approval or plan check?
05 · The decision
Coastal context, certified programs and who decides
Three separate facts are easy to blur. First, whether the parcel lies inside the coastal zone boundary at all. Second, whether the local coastal program for that segment is certified; where it is, the Coastal Commission describes most coastal development permits as issued by the local government. Third, whether the Commission still has a role: it retains permit authority over tidelands, submerged lands and public trust lands, and appeal jurisdiction over certain types of development.
Exemptions and exclusions depend on the Act, the local program and the specific project, so treat them as a question for the city, not a conclusion from a map or this guide. Nothing here announces that a parcel qualifies for an exemption or a particular process.
| Question | Evidence needed | Who resolves it | Effect on layout or budget | Next official resource |
|---|---|---|---|---|
| Is the parcel inside the coastal zone? | Parcel check against the boundary, confirmed by the city | Owner, confirmed with planning | Decides whether coastal review applies at all | City planning or Coastal Commission maps |
| Is the local program certified here? | LCP status for the parcel's segment | City planning, per Commission records | Decides whether the city issues the coastal permit | Coastal Commission LCP information |
| Does the Commission keep a role? | Retained-jurisdiction or appeal-area status | City and Coastal Commission | Can add an appeal period or a separate Commission permit | Coastal Commission LCP information |
| Is an exemption claimed? | City's written determination for this project | City planning | Changes review path; never assume it | City planning department |
| How does coastal review sit with design? | City's stated order of coastal, planning and plan check | City planning and building | Can shape siting, height and drainage before drawings are fixed | PRC § 30600 and the city's process |
Ask yourself
- Which segment's local coastal program covers the parcel, and is it certified?
- Is the project in an area or of a type where a local decision can be appealed to the Commission?
A scenario to consider
Illustrative scenario, not a client project: an owner in a beach city assumes the lot is in the coastal zone; the city's map shows it is a few blocks outside. The planning path is simpler than expected.
Planning scenario
Part of the custom-home planning series: Custom home planning
Bring this to your conversation
- Check the parcel against the coastal zone boundary
- Ask which agency issues the coastal permit
- Ask whether the area's LCP is certified
- Ask how coastal review is sequenced with plan check
- Raise coastal questions before design is fixed
Terms used here
- Jurisdiction
- The public agency with authority over the address; a postal city or neighborhood name alone does not prove it.
- Plan check
- Agency examination of submitted construction documents; the reviewer may request corrections before approval.
One more question
Does every house in a beach city need a coastal permit?
No. Only parcels inside the coastal zone are subject to it, and some work is exempt. The city can tell you for a specific parcel.
Official references
Research the property · Web resource · English source
California Coastal Commission — Local Coastal ProgramsUse this for: Find the local coastal planning framework and responsible coastal-review office.
Research the property · Statute · English source
California Legislature — Public Resources Code § 30600 (Coastal Act)Use this for: Read the Coastal Act permit provision, including its exceptions, before agency confirmation.
Research the property · Web resource · English source
California Geological Survey — EQ Zapp: earthquake hazards zone applicationUse this for: Locate mapped earthquake hazard context for a site discussion, not a parcel clearance.
For requirements specific to your property, consult the local reviewing authority.
About this guide
Published by KB Remodeling from the official sources cited. It is not attributed to an individual author and does not claim review by an architect, engineer or attorney. We receive remodel, ADU, new-home and rebuild inquiries; scope, licensing and location are reviewed before any next step.