At a Half Moon Bay Planning Commission meeting in May 2026, staff were still arguing about gravel. A stretch of the California Coastal Trail near Poplar Beach had washed out as the bluff beneath it crumbled into the ocean, and State Parks wanted an emergency permit to shift the path inland with decomposed granite surfacing and split-rail fencing. Commissioner Christopher DelNagro pushed back, worried the loose material would be the only gravel section of trail inside city limits. Chair David Gorn was more blunt about the fix's odds against the next winter storm. "I'd be surprised if it lasted the winter," he said, before voting to approve it anyway, because nobody on the dais wanted to leave cyclists and families stepping around collapsed pavement on a working retreat.
That single agenda item captures something worth knowing before you write an offer or list a property anywhere near this coastline: in Half Moon Bay, a permit decision is rarely final when the local body says yes. It can still travel to a second authority with its own calendar, its own filing rules, and its own reasons to say no. Buyers and sellers who treat the Coastal Development Permit like an ordinary building permit, one approval and done, are working from the wrong mental model. The city runs two separate appeal clocks, and they don't run on the same schedule.
Why almost everything here needs a coastal permit, not just oceanfront lots
The instinct is to assume Coastal Development Permits are a bluff-house problem. They aren't. The entire city of Half Moon Bay sits inside the Coastal Zone established by the California Coastal Act, so a CDP applies to development citywide, not just to parcels that touch sand. The city issues most of these permits itself, but it does so under the Coastal Commission's continuing jurisdiction, and the review runs alongside whatever building or zoning permit the project would need anyway.
That means a second-story addition on a street that never sees the ocean can trigger the same layered review as a rebuild on the bluff. Recent Director's Hearing approvals bear this out: a second-story addition and remodel at 960 Pilarcitos Avenue, a remodel and addition at 708 Johnston Street, and an ADU at 424 Valdez all moved through the same permitting apparatus that governs oceanfront work. The zone doesn't discriminate by view.
The first clock: ten working days, filed locally
Once the Planning Commission or Planning Director rules on a CDP, the losing side has ten working days to file an appeal with the City Clerk, first to the Planning Commission if the decision came from staff, then to the City Council. That part matches what most buyers expect from any local land-use appeal. It's finite, it's local, and once it runs out, the project looks settled.
The second clock: fourteen calendar days, and it doesn't start when you think
For a meaningful share of Half Moon Bay parcels, the local appeal window isn't the last one. Development between the sea and the first public road, or within 300 feet of a bluff, wetland, or stream, remains appealable directly to the California Coastal Commission, bypassing the City Council entirely. The city must mail notice of its final action to the Commission within seven days of that decision, and a qualified appellant then has fourteen calendar days from the Commission's receipt of that notice to file.
The distinction that trips people up is the starting gun. The local clock starts at the decision. The Commission clock starts later, when the Commission actually receives the paperwork, not when the city approves the project. Stack the mailing window on top of the appeal window and a project that looked final at the local level can still be open to challenge for the better part of a month afterward.
| Appeal path | Who can file | Filing window | When the clock starts |
|---|---|---|---|
| Local appeal | Applicant or interested party | 10 working days | Date of the Planning Commission or Council decision |
| Coastal Commission appeal | Qualified appellant | 14 calendar days | Date the Commission receives the city's notice of final action, which is mailed within 7 days of the decision |
For a buyer working inside a standard financing contingency period, that gap matters. A seller who tells you the remodel is "fully permitted" may be describing the local outcome, not the outcome once the Commission's window has actually closed. Ask which clock has run before you treat a completed permit history as settled.
The one project type that skips the second clock entirely
Assembly Bill 462, adopted in October 2025, changed this calculus for one specific category. Coastal Development Permits approved for accessory dwelling unit projects, meaning development that creates or exclusively serves an ADU, are no longer appealable to the California Coastal Commission. The local ten-day window still applies, but the second clock is gone.
That's a meaningful shift for anyone weighing an ADU against a primary-residence addition on the same lot. The ADU path now reaches a genuinely final permit faster and with less exposure to a Commission-level challenge, which matters to move-up sellers thinking about multi-generational space or rental income, and to buyers comparing the carrying cost of two different renovation plans on the same coastal parcel.
A separate inspection that has nothing to do with any of this
None of the above touches a requirement that catches sellers who assume all their pre-sale obligations live in one place. Half Moon Bay, along with El Granada, Miramar, Princeton, Moss Beach, and Montara, requires a point-of-sale smoke detector inspection for existing residential occupancies, enforced by the Coastside Fire Protection District rather than the city's planning department. It has no connection to the CDP process, no appeal window, and no relationship to whatever renovation history the property carries. It's a fire-code compliance step tied to the sale itself, and it's easy to overlook precisely because it doesn't show up anywhere near the permit conversation a buyer's agent is usually having.
What to actually check before you write an offer or list
- Ask whether the property, or any planned work, falls within 300 feet of a bluff, wetland, stream, or the sea, since that determines whether the Coastal Commission appeal path applies at all.
- If a remodel or addition already has a completed local permit, confirm whether the fourteen-day Commission window has actually closed, not just whether the local ten-day window has passed.
- If you're considering an ADU, ask whether it will be filed as an ADU-only CDP, since that's the category AB 462 pulled out of Commission appeal jurisdiction.
- Schedule the point-of-sale smoke detector inspection through Coastside Fire Protection District as its own line item, separate from any general home inspection.
- On bluff-adjacent or oceanfront parcels, ask directly about erosion history or prior seawall disputes. The ongoing litigation between the Casa Mira condominium association and the Coastal Commission over an unpermitted seawall is a live reminder that what an owner is allowed to build to protect a coastal property, and what happens when they build it without a permit, can become a multi-year legal question that outlasts any single sale.
A short FAQ
Does every property in Half Moon Bay need a Coastal Development Permit? Most exterior development does, because the Coastal Zone covers the entire city, not just parcels that touch the water. Whether the city or the Coastal Commission ultimately controls the appeal depends on the parcel's location relative to the bluff, wetlands, or the sea.
How long does a CDP realistically take once you count both appeal windows? There's no single number, which is the point. A project with no appeal exposure beyond the local level can be final within the ten working days. A project inside Commission appeal jurisdiction isn't truly settled until the fourteen-calendar-day window closes after the Commission receives the city's notice, a date that depends on when the mailing goes out, not when the local body voted.
Does the smoke detector inspection replace a general home inspection? No. It's a narrow, fire-code specific requirement enforced by Coastside Fire Protection District at the point of sale, separate from any inspection a buyer chooses to order and separate from the CDP process entirely.
Half Moon Bay real estate rewards buyers and sellers who ask about the permit calendar before they fall for the view. If you're evaluating a coastal property with a recent remodel, weighing an ADU against a larger addition, or trying to understand what a bluff-adjacent lot actually allows you to build, Travis Conte & Associates can help you read the permit history correctly before you write the offer. Let's Connect.
