Coast · Rules signpost · Reviewed July 14, 2026
Coastal development permits
A simple first pass before you build, grade, or change use in the coastal zone.
The short version
Check the parcel and the work before anyone starts
Inside the coastal zone, more than new buildings can need a permit. Check the parcel, list all the work, and find the office with coastal authority before anyone starts.
What changes the answer: A building permit, old approval, or map pin does not settle whether the job needs coastal approval or can be appealed.
The coast has its own rule layer. If a place is inside the coastal zone, development generally needs coastal approval before work starts.
Development is a wide word here. Grading, demolition, a change in use, a lot split, work that changes access, and major vegetation removal can count even when no new building is planned.
The state office is not always the first stop. In many cities and counties, the local planning office handles most permits under a certified Local Coastal Program.
The safe first move is to check the map, describe all of the work, and get the permit or exemption route from the office with authority over that parcel.
How it works
Development means more than a new building
The Coastal Act gives development a wide meaning. It can cover building, demolition, grading, digging, placing material, dividing land, changing public access, removing major plants, or changing how much land or water is used.
That does not mean every small job needs a full permit. It means the office should check the job before anyone assumes no permit is needed. Tell the planner about all the work, not only the part that sounds like building.
The permit desk follows the parcel
After the Coastal Commission certifies a Local Coastal Program, the city or county usually handles most coastal permits there. The Commission still handles some lands, including certain tidelands and public trust lands. It also hears some appeals.
In an area without a certified program, the Commission district office may be the permit desk. A coastal-zone map is a good first check. Have a planner confirm a close boundary or odd parcel.
An exemption should come from the permit office
State law can excuse some work on an existing home or other building from the permit step. Some repair and upkeep can be excused too. But those rules have limits. Expansion, replacement, a use change, blocked access, or harm to coastal land can change the answer.
A repair to an existing part can fit the repair-and-maintenance exemption when it does not add to or enlarge the structure. Expanding a deck, moving a wall outward, or replacing a small feature with a larger one is a different job. Work near beaches, bluffs, wetlands, and public access can also receive closer review.
After a disaster, a replacement can qualify for a separate exemption when it keeps the same use and location and grows no more than 10 percent in floor area, height, or bulk. It must still fit current zoning. That rule is not a blanket right to rebuild any design.
The Commission has forms for written exemptions. Use the same habit when a local office handles the parcel. Have the right office put its answer in writing. Keep that answer with the project file.
Emergency work has its own path
A dangerous bluff, storm damage, broken public service, or other urgent harm does not turn the permit system off. Emergency permits and limited waivers have their own notice, work limits, and next steps.
The Coastal Act's narrow waiver is for immediate emergency work by a person or public agency carrying out a public service. It requires notice to the Commission's executive director within three days. The waiver does not authorize a permanent structure worth more than $125,000, adjusted each year for inflation. Most private property emergencies use the Commission or local emergency-permit path instead.
Call the local coastal planner or Commission district as soon as the danger is known. Approval for short-term work may still lead to a regular coastal permit. That can apply to permanent work or to keeping the emergency work in place.
Coastal approval is one part of the project file
A project may also need building, grading, fire, habitat, flood, septic, tree, or other approval. One permit does not replace the others. Coastal approval also has its own terms and appeal time before the work may begin.
Only specified local coastal decisions are appealable to the Commission. Appeal steps and time limits can be short. Use the notice for that exact decision instead of a general calendar.
First moves
- 1
Check whether the parcel is in the coastal zone.
- 2
Write down the full job, including grading, demolition, use changes, lot work, access changes, and vegetation removal.
- 3
Confirm whether the city, county, port, or Coastal Commission handles coastal permits there.
- 4
Get the permit, written exemption, repair and maintenance, or emergency path that fits the work.
- 5
Do not start until every required approval is issued and effective.
Watch for
- 1
A local building permit is not always the same thing as a coastal development permit.
- 2
Some local decisions can still be appealed to the Coastal Commission.
- 3
Sea-level rise, erosion, public access, wetlands, and habitat can all matter.
- 4
If the parcel sits close to a boundary line, confirm with a planner before trusting a quick map glance.
Official sources
Where to confirm this
Use the source that matches the part you need. Current forms, fees, deadlines, maps, and local decisions can change after this guide is reviewed.
This is not legal advice. A regular building permit and a coastal development permit are not the same thing. Confirm the exact parcel with the local planner or Commission district office.