Can I start work while the CDP exemption is being documented?

No. The exemption must be approved before work begins. An over-the-counter categorical exemption takes 5–10 business days — not worth starting without it.

What's the difference between a CDP and a city building permit?

A CDP satisfies the Coastal Act (state land-use). A building permit satisfies the Building Code (structural/life-safety). Coastal-zone projects need both — one doesn't substitute for the other.

How long does the full CDP process take in Malibu?

5–10 business days for a documented like-for-like exemption. 6–8 weeks for a standard CDP on a changed opening. Add 60–90 days if a state-level appeal is filed.

Do Chapter 7A fire-zone requirements apply in the Malibu coastal zone simultaneously?

Yes — Malibu is both in the California Coastal Zone and almost entirely in the Very High Fire Hazard Severity Zone. Window and door replacements there must satisfy both the Coastal Act (CDP or documented exemption) and Chapter 7A (fiberglass or aluminum frames, tempered or laminated glass, ember screens). The two frameworks are additive and don't conflict, but they must both be met. We file the CDP and the Chapter 7A-compliant spec simultaneously.

Can a window contractor file the CDP exemption for me, or does the homeowner have to do it?

A licensed contractor can file the exemption documentation on the homeowner's behalf with written authorization. We do this on every coastal-zone job: we prepare the full package, file it under contractor authorization, and give you copies of everything. The homeowner doesn't need to appear at the counter. What we cannot do is file a CDP application that requires the property owner's signature — that form goes to you for execution before we submit.

Local LA Topics

Coastal Development Permits for Windows & Doors in Malibu and Pacific Palisades

Q: How do I find out if my property is in the coastal zone?

Use the Coastal Commission's parcel lookup at coastal.ca.gov or the City of LA's ZIMAS system. We run both on every Malibu and Palisades walkthrough.

Q: What's the penalty for skipping a CDP when one was required?

Cease and desist, potential restoration order, and civil penalties up to $11,180 per day. Unpermitted coastal work also creates title insurance problems at sale.

By Israel AquinoApril 3, 20268 min read

TL;DR

Window and door replacement in Malibu's coastal zone requires either a documented exemption or a full Coastal Development Permit. Like-for-like swaps (same size, same location) are typically exempt but must be documented — undocumented exemptions still trigger stop-work notices. Changed openings, enlargements, and new penetrations require a CDP: 4–8 weeks for categorical exemptions in Malibu, 6–20 weeks for standard CDPs. Post-Palisades fire rebuilds in the coastal zone add 8–16 weeks on top of Chapter 7A fire resilience requirements.

The California Coastal Commission has jurisdiction over a coastal zone that includes all of Malibu and portions of Pacific Palisades, Santa Monica, Venice, and Playa del Rey. Within that zone, certain exterior alterations — including window and door replacement — may require a Coastal Development Permit (CDP) in addition to the standard building permit. Many homeowners and even some contractors don't know this. We've learned it the hard way on behalf of clients who got a stop-work notice mid-install.

The Coastal Act exists to protect coastal visual resources, public access, and habitat. Window and door replacement touches all three: a new glazed opening changes light transmission, glare, and in some cases view corridors. The permit process is less burdensome than most people fear, but skipping it — or failing to document an exemption — creates title insurance problems and can require you to reverse the work.

This post covers everything we've encountered across dozens of coastal-zone installs in Malibu and the Palisades: which projects need a CDP, which qualify for a documented exemption, what the timeline looks like, and what happens in the post-Palisades fire rebuild context where two overlapping regulatory frameworks apply simultaneously.

Does my project need a CDP?

Not every coastal zone project triggers the permit. But the exemption still needs to be documented.

California Coastal Act Section 30610 exempts routine maintenance and repair that doesn't expand structure or intensity of use. Like-for-like window replacement — same size, same location, no change to structure — typically qualifies for this exemption. But the exemption must be documented. A verbal assurance from a contractor that 'this is exempt' is not documentation. If the city or Commission later asks, you need a written record showing why the exemption applied.

The practical test comes down to a few questions: Are you changing the opening size? Adding a new opening where there wasn't one before? Converting a door to a window or a window to a sliding glass door? Altering the floor area or envelope of the structure? If the answer to any of these is yes, you are likely outside the maintenance exemption and into CDP territory.

Malibu has delegated permit authority from the Coastal Commission — meaning their local Community Development Department handles CDPs directly, not the state office in San Francisco. Their local CDP process runs 4–8 weeks for categorical exemptions and 6–20 weeks for standard CDPs, depending on scope and whether any appeals are filed. We always start the CDP process before ordering materials, not after, because the material lead times and the permit timelines are close enough that a permit delay can stall an install by 6–10 weeks if you get the sequencing wrong.

When a CDP is required vs when an exemption applies

Six scenarios — know which category your project falls into before you sign anything.

1
Like-for-like window swap (same size, same location) — usually exempt, but document it
This is the most common scenario we handle. Same rough opening, same window type, no structural change. Qualifies for the Section 30610 maintenance exemption in most cases. However, you must document it: photographs of the existing condition, a written scope confirming no opening dimension changes, and a statement filed with Malibu's Community Development Department. Without documentation, you're exposed to a stop-work notice even on a clean swap.
2
Window enlarged or relocated — CDP required
Changing the size of an existing opening — even by a few inches — takes the project out of the maintenance exemption. Same for moving a window to a different position on the wall. These alterations change the exterior appearance of the structure and fall under CDP review. Budget 6–8 weeks for a standard CDP in Malibu for this scope.
3
Existing window converted to sliding glass door — CDP required
Replacing a fixed or operable window with a sliding glass door changes the type and intensity of the opening, regardless of whether the rough framing is altered. This is one of the most common surprises we see in Malibu: homeowners assume it's 'still the same hole' and skip the CDP. It isn't. The conversion requires a standard CDP and typically adds a structural calculation letter to the submittal package.
4
New window or door added where there was no opening — CDP required
Any new penetration in an exterior wall is a structural alteration and requires a CDP without exception. This includes adding a skylight over a coastal-facing room, cutting a new door opening to a deck, or adding a clerestory window. Lead time from application to approval runs 8–20 weeks depending on whether the project triggers a coastal visual analysis.
5
Window replacement in a beachfront property in the primary viewing corridor — may trigger a coastal visual analysis regardless of size
Properties that sit in the primary viewing corridor — meaning a public road, trail, or beach has a direct sight line to the elevation in question — may trigger a visual impact analysis even for like-for-like replacements. This is especially common on PCH-facing elevations in Malibu and on Palisades properties above the bluff where the ocean view corridor is protected. The analysis adds 3–6 weeks to the exemption documentation process.
6
Post-disaster rebuild (Palisades fire) — special rules under the Coastal Commission's post-disaster protocols apply
The Coastal Commission adopted specific post-disaster protocols for the January 2025 Palisades fire rebuild. These protocols streamline some CDP requirements for like-kind reconstruction but add overlay requirements for fire-resistant glazing under Chapter 7A. A rebuild in the coastal zone must satisfy both the post-disaster CDP protocol and the Chapter 7A glazing spec simultaneously — the two frameworks don't conflict, but they don't simplify each other either. We work through both tracks in parallel to compress the total timeline.

The CDP process in Malibu

Malibu handles coastal permits locally — here's exactly how the process runs.

Malibu has certified local coastal program authority, which means their Community Development Department processes CDPs in-house rather than routing them to the state Coastal Commission office. This is a meaningful advantage for timing: local staff know the local conditions, the counter reviews are faster, and appeals (when they happen) still go to the state Commission but the base process is shorter.

A categorical exemption for like-for-like replacement is reviewed over-the-counter or by staff in 5–10 business days. We submit a package that includes: a site plan showing existing window locations, photographs of all existing openings on the coastal-facing elevation, a written scope of work confirming no dimension changes, and material cut sheets for the replacement units. The over-the-counter review costs $150–$350 in filing fees depending on Malibu's current fee schedule. We bring the complete package to the counter meeting — homeowners who come in without photos or cut sheets get sent home and restart the clock.

A standard CDP application for a changed opening — enlarged window, new door, window-to-door conversion — runs 6–8 weeks from submittal to approval under normal circumstances. The application fee is $1,200–$2,800 depending on project valuation. Our submittal package for a standard CDP adds architectural drawings showing the proposed vs existing condition, a structural calculation letter if the framing is altered, and a coastal visual impact statement for any elevation visible from a public vantage point.

An appeal to the state Coastal Commission adds 60–90 days to whatever the local timeline was. Appeals are uncommon on residential window and door projects, but they do happen — usually when a neighbor or environmental group objects to a change that affects a view corridor or habitat buffer. We've been through two Malibu CDP appeals in the past three years; both resolved in the homeowner's favor, but both added 70–80 days to the project timeline. We submit all required documentation and attend the counter meeting so you don't have to.

Pacific Palisades coastal zone

Not all of the Palisades is in the coastal zone — and the boundary matters a lot right now.

The Pacific Palisades coastal zone boundary roughly follows Sunset Boulevard and the canyon ridges. Properties on the ocean-side of Sunset in the Palisades Riviera and beach areas are in the coastal zone; most of the upper Palisades — the neighborhoods above Sunset toward Temescal Canyon and the 405 — are not. The boundary is not intuitive from the street, and the parcel-level determination matters enormously for permit sequencing.

We determine your zone status on the initial walkthrough using the Coastal Commission's official parcel lookup and the City of LA's coastal zone mapping. This is a 5-minute check that saves weeks of confusion. We've seen contractors start a full-frame install in a coastal zone parcel under a standard LADBS permit alone — the stop-work notice arrived on day two of a three-day install.

Post-Palisades fire rebuilds in the coastal zone are subject to both Chapter 7A fire resilience requirements and coastal permit requirements. Chapter 7A mandates fire-rated glazing on windows within 100 feet of a property line facing a fire hazard severity zone — a requirement that interacts directly with the window spec we'd select for coastal aesthetics and UV performance. The CDP process for a fire rebuild runs concurrently with the Chapter 7A plan check, but the two timelines don't always align: Chapter 7A plan check at LADBS currently runs 4–6 weeks, while a Palisades-area coastal CDP (processed through the City of LA's coastal planning division) runs 6–12 weeks. The combination adds 8–16 weeks to the total timeline compared to an equivalent non-coastal, non-fire-zone project. We sequence the permit submittals from day one to overlap as much of that time as possible.

Step-by-step: the coastal permit process for window replacement

How we handle a Malibu or Palisades window or door project from contract to close.

The sequence differs from a non-coastal job primarily in the pre-install documentation phase. Here is the exact order of steps.

Day 1

Parcel zone confirmation

We pull the Coastal Commission parcel lookup and the City of LA ZIMAS coastal layer before the quote is written. If the parcel is in the coastal zone, the permit sequence changes. We tell you at the consult — never at the job site.

Day 2–5

Scope classification — exempt or CDP?

Like-for-like replacement: we prepare the Section 30610 exemption documentation package — site plan, existing condition photos, scope statement, and material cut sheets. Changed opening or new penetration: we prepare the standard CDP application. Both are submitted before any material is ordered.

Day 5–10

CDP or exemption filing with Malibu CDD or LA Coastal Planning Division

Exemption: over-the-counter submission to Malibu Community Development or LA's coastal planning counter. Standard CDP: formal application submission with architectural drawings, structural calcs if applicable, and coastal visual impact statement. Filing fees are included in our project cost estimate.

5 business days to 12 weeks

Review and approval

Categorical exemption: 5–10 business days, counter or staff review. Standard CDP in Malibu: 6–8 weeks from complete application. LA Coastal Division CDP: 6–12 weeks. We track the review and respond to any staff comments within 48 hours to avoid adding time at the end of the review cycle.

Weeks 1–4, parallel to CDP

Parallel building permit filing

We file the standard LADBS or Malibu CDD building permit concurrently with the CDP process. Building permits typically run 3–4 weeks in Malibu and LADBS for window and door work. We time the filings so both are ready simultaneously, minimizing the gap between CDP approval and permit issuance.

After permit approval

Material order

We place the material order once both the CDP (or documented exemption) and the building permit are in hand. We never order before permit approval in the coastal zone — a material order placed against a pending CDP that gets denied is an expensive problem. Lead times for standard windows in coastal aluminum and fiberglass products run 4–10 weeks from our distributors.

Install + 1–2 days

Install and inspection

Installation runs 1–3 days depending on scope. Coastal zone installations require the same building department inspection as non-coastal jobs plus documentation that the installed products match the permitted scope. We prepare the inspection package (permit card, cut sheets, installation checklist) and schedule the inspection for day two of the install or immediately post-completion.

What people ask

Coastal permit questions we get on every Malibu and Palisades walkthrough.

01How do I find out if my property is in the coastal zone?

The California Coastal Commission maintains an online mapping tool at coastal.ca.gov where you can enter your parcel number or address and see the coastal zone boundary. The City of LA's Planning Department also has a parcel-level coastal zone layer in their ZIMAS system. In practice, we run both checks on every Malibu and Palisades walkthrough because the two maps occasionally show different boundaries for edge parcels, and we want the more conservative determination in writing before we touch anything.

02What's the penalty for skipping a CDP when one was required?

The Coastal Commission can issue a cease and desist order requiring you to stop work immediately. If the work is complete, they can require restoration — meaning you may have to remove the installed windows and return the opening to its original condition at your expense. Civil penalties run up to $11,180 per day per violation under current enforcement guidelines. Beyond the Commission, an unpermitted coastal-zone alteration creates a title insurance problem: it will show up on a pre-sale inspection and either kill the deal or require escrow holdback until remediated. We've helped three clients resolve after-the-fact CDP situations; it's expensive and slow. The permit is cheaper.

03Does a CDP add cost beyond the permit fee?

Yes, in a few ways. The CDP filing fee itself runs $150–$350 for a categorical exemption or $1,200–$2,800 for a standard CDP in Malibu. Beyond that, the documentation package we prepare — photographs, cut sheets, coastal visual impact statement, structural calculations if needed — is 4–8 hours of pre-install work that we price into the project. The bigger cost driver is timing: if your window order is already placed and the CDP takes 8 weeks, you're paying for material storage. We sequence the order to arrive during the last week of the permit window to avoid carrying costs.

04Can I start a like-for-like replacement while the CDP exemption is being documented?

No — and this is the trap that generates most of the stop-work notices we've seen. The exemption must be approved and documented before work begins, not filed concurrently. An over-the-counter categorical exemption review runs 5–10 business days. That's not a long wait, and pulling the trigger before it's done isn't worth the risk. We schedule the material delivery and crew mobilization for the day after we have the exemption in hand.

05What's the difference between the Coastal Commission and the city building department?

The California Coastal Commission is a state agency with jurisdiction over land use within the coastal zone — its authority derives from the 1976 Coastal Act. The city building department (LADBS for most of LA, Malibu's Community Development Department for Malibu) enforces the California Building Code and local building ordinances. They're parallel systems. A CDP from the Coastal Commission (or a documented exemption) addresses coastal land-use compliance; a building permit from the city addresses structural and life-safety code compliance. Most coastal-zone window and door projects need both. A building permit alone does not satisfy the Coastal Act, and a CDP alone does not satisfy the Building Code.

06My contractor says they've done 'dozens of Malibu jobs' and never needed a CDP. Should I trust that?

Be careful. Many contractors have done like-for-like swaps in the coastal zone without a documented exemption and haven't been caught — that's different from not needing one. The Coastal Commission's enforcement is complaint-triggered and inspection-triggered, not proactive on every parcel. An undocumented exemption on a past job that wasn't challenged doesn't mean the exemption wasn't required. Ask the contractor to show you the exemption documentation from those jobs. If they can't, ask them to put in writing that they'll cover the cost of any CDP enforcement action or title remediation. That usually clarifies the conversation quickly.

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