The Areas · Porter Ranch · 91326 Porter Ranch

A master plan from 1990, a gas field, and the hills above Chatsworth.

This is the neighborhood over the ridge from the streets I grew up on. Two things shape a purchase here more than anything a listing will mention: a Specific Plan that has governed how this land develops since 1990, and Aliso Canyon. Most agents skip both. I would rather hand you the dates, the ordinance numbers, and the places to verify them yourself.

Specific Plan, 1990 Aliso Canyon The Vineyards 91326

Talk Porter Ranch With Me Read Its Story First

1990 City Ordinance No. 166,068 established the Porter Ranch Land Use / Transportation Specific Plan — amended in 2001 and still the rulebook here.

2015 The blowout at well SS-25 began October 23rd and was permanently sealed February 11, 2016 — the largest known methane release in U.S. history.

345,000 Square feet of mixed-use at The Vineyards at Porter Ranch, which broke ground in June 2017.

91326 The ZIP — though its boundary and the neighborhood’s are not the same shape, which quietly distorts a lot of market data.

The Long Story

A neighborhood that was planned, then tested.

Porter Ranch is one of the few places in the Valley whose growth was written down in advance and then followed. That is why it looks the way it does. It is also a place that went through something hard in public, and the record of what happened — and what was settled — is a matter of public documents rather than rumor.

“Land that was planned on paper first tends to hold its shape. Read the plan.”

1960s Large-scale development begins

Home building at scale arrives in the northern Valley, on the rising ground where the floor of the San Fernando Valley meets the Santa Susana Mountains. The terrain is the reason the neighborhood reads differently from the flat grid south of it.

1990 The Specific Plan

The City of Los Angeles adopted the Porter Ranch Land Use / Transportation Specific Plan by Ordinance No. 166,068. A Specific Plan is a tailored rulebook layered on top of ordinary zoning — it governs land use and circulation for this area specifically, and it is the document that has shaped what could be built here ever since.

2001 The plan is amended

Ordinances 173,871 through 173,873 amended the Specific Plan. If you are evaluating what can or cannot happen on or near a parcel here, the current amended text is the document that answers it — not a general read of the city’s zoning map.

Oct. 23, 2015 Aliso Canyon

A blowout began at well SS-25 of the Aliso Canyon natural gas storage facility, operated by SoCalGas. It became the largest known methane release in United States history and displaced thousands of households from the surrounding area.

Feb. 11, 2016 The well is permanently sealed

The leak was permanently sealed. What followed was years of legal and regulatory process rather than a clean ending — which is precisely why it still belongs in a buyer’s due diligence conversation today.

June 2017 The Vineyards breaks ground

Construction began on The Vineyards at Porter Ranch, an approximately 345,000-square-foot mixed-use center by Shapell Liberty at Rinaldi Street and Porter Ranch Drive. Its retail and entertainment component brought Whole Foods Market, AMC, Nordstrom Rack and Ulta to the neighborhood’s center of gravity.

Dec. 2024 A path toward closure — not a closure date

CPUC Decision 24-12-076 established a framework aimed at eventually eliminating reliance on Aliso Canyon, built around a peak-day demand threshold of 4,121 MMcf/d and a biennial assessment process. The first biennial assessment issued in 2025. The facility is still operating, and no closure date is set. Anyone who tells you it is closing on a particular date is ahead of the record.

Mar. 24, 2025 New fire hazard maps for the city

CAL FIRE and the Office of the State Fire Marshal released updated Local Responsibility Area Fire Hazard Severity Zone maps covering the City of Los Angeles — the first update in over a decade, and the first to map three tiers inside city limits rather than one. See the fire section below for what that actually changes for a buyer here.

Ground Truth

What locals know that listings don’t say.

The ZIP and the neighborhood are different shapes

91326 carries the USPS place name “Porter Ranch,” but the ZIP boundary and the neighborhood boundary do not match. Some homes marketed as Porter Ranch carry Northridge or Granada Hills ZIPs. That means ZIP-level market statistics quietly blend more than one market — treat any “91326 median” with suspicion and ask what set of homes it actually covers.

A Specific Plan governs here, not just zoning

Ordinance No. 166,068 (1990), as amended in 2001, is a rulebook written for this area alone. If a question matters — what can be built, what a nearby parcel could become — the Specific Plan answers it, and a general zoning lookup may not.

Aliso Canyon is a disclosure conversation, not a rumor

The events, the settlements, and the regulatory status are public record. A good agent points you to the documents and to your statutory disclosure package rather than offering an opinion about air quality or property values. I will do the former and not the latter.

The schools span more than one system

Porter Ranch is in LAUSD. Porter Ranch Community School serves K–8, Castlebay Lane Charter is an LAUSD-affiliated charter elementary in the neighborhood, and many families feed to Granada Hills Charter at 10535 Zelzah Avenue. Attendance boundaries move — verify at the parcel, never at the neighborhood.

The terrain is the whole story

Porter Ranch sits where the Valley floor rises toward the Santa Susana Mountains, with Chatsworth to the south and west, Northridge to the south, and Granada Hills to the north and east. Elevation and slope change everything downstream — views, wind exposure, brush clearance obligations, and how a parcel is mapped for fire hazard.

The 118 is the spine

The Ronald Reagan Freeway runs east–west through the community and defines the practical commute. It is also the line a lot of buyers use, informally, to describe where they want to be — which is worth knowing before you interpret what someone means by “Porter Ranch.”

The Numbers

How to read the Porter Ranch market like a local.

Distrust the ZIP median

Because 91326 and the neighborhood are not the same footprint, a ZIP-level median blends homes buyers would never consider substitutes. Ask for comparables drawn from the actual streets and the actual product type, not from a ZIP aggregate. I will show you the set I used and why.

Supply here is plan-constrained

A Specific Plan that has governed the area since 1990 shapes what can be added and where. That is a structural feature of this market, not a temporary condition, and it belongs in any honest conversation about long-run supply.

Price the insurance before you price the house

Get a written insurance quote for the specific address before you remove contingencies. This is true across the Valley now, and it is not something to assume from a neighboring property’s experience.

Read the disclosure package as data

The statutory Natural Hazard Disclosure and the seller’s disclosures carry more decision-relevant information than any market chart. In this neighborhood specifically, read them closely and ask questions in writing.

Why I Know This Place

I grew up on the other side of the same ridge.

I am from Chatsworth — 91311, directly south and west of here. Porter Ranch was the neighborhood up the hill: the one you drove through, the one where the streets started to climb and the view opened back over the Valley. I will not pretend I have childhood stories on these particular blocks. What I do have is two decades of knowing this corner of the Valley from the ground, and a working habit of reading the ordinance before offering an opinion.

That matters more here than in most neighborhoods. Porter Ranch has a land-use rulebook of its own and a disclosure history that deserves precision rather than reassurance. If you want an agent who will tell you it is all fine, there are plenty. If you want one who will hand you the ordinance numbers, the CPUC docket, and the parcel lookup, that is the job I actually enjoy.

Next Door

Porter Ranch sits against the zip codes I know best.

91311 · Chatsworth Directly south and west — where I grew up, and the market I know street by street. Northridge South of here, built around CSUN, with a very different housing stock and demand profile. West Hills Southwest across the Valley’s northern rim — where I learned how houses are actually built.

One Honest Conversation

Thinking about Porter Ranch? Start with someone who will show you the documents.

No pressure and no drip campaign — I only follow up if you ask me to. Bring me an address and I will bring you the Specific Plan context, the parcel-level fire zone lookup, and a straight read on what the disclosures are telling you.

Text Me About Porter Ranch Call (818) 402-7326 See My Current Listings

The homeowner brief

What I actually know about Porter Ranch.

The ordinance numbers, the dates, and the two documents that matter more here than anywhere else in the Valley.

A plan written before the houses

The City of Los Angeles adopted the Porter Ranch Land Use / Transportation Specific Plan by Ordinance No. 166,068 in 1990, amended in 2001 by Ordinances 173,871 through 173,873. A Specific Plan is a rulebook written for one area, layered on top of ordinary zoning. When a question here turns on what can be built, that document answers it — a general zoning lookup may not.

The ZIP is not the neighborhood

91326 carries the USPS place name “Porter Ranch,” but the ZIP boundary and the neighborhood boundary are different shapes, and some homes marketed as Porter Ranch carry Northridge or Granada Hills ZIPs. Any statistic quoted at the ZIP level is therefore blending more than one market. Ask which homes are actually in the set.

The schools, by name

Porter Ranch is in Los Angeles Unified. Porter Ranch Community School serves K–8 (CDS code 19647330126607), Castlebay Lane Charter is an LAUSD-affiliated charter elementary in the neighborhood, and Granada Hills Charter at 10535 Zelzah Avenue serves many families here. Attendance boundaries move — verify at the parcel, never at the neighborhood.

Aliso Canyon, precisely

A blowout at well SS-25 of the Aliso Canyon natural gas storage facility, operated by SoCalGas, began October 23, 2015 and was permanently sealed February 11, 2016. It was the largest known methane release in United States history. Those are the dates; everything else deserves a source rather than an opinion.

What was actually settled

Sempra and SoCalGas reached a settlement of approximately $1.8 billion resolving claims of more than 35,000 claimants. A separate Los Angeles County and State action produced a $119.5 million settlement that included safety upgrades. The Los Angeles County Department of Public Health is overseeing a long-term health study conducted by UCLA and funded by SoCalGas.

The facility today

It is still operating. CPUC Decision 24-12-076, issued in December 2024, established a framework aimed at eventually eliminating reliance on Aliso Canyon, built around a peak-day demand threshold of 4,121 MMcf/d and a biennial assessment process; the first biennial assessment issued in 2025. No closure date is set. Anyone quoting you one is ahead of the public record.

Straight answers

Fire zones and insurance: the straight version.

The maps changed in 2025, and what changed is widely misunderstood. Here is what is actually true, and how to get a real answer for a specific address.

I am not going to tell you “Porter Ranch is in X zone.” I am going to show you how to check the parcel.

Fire hazard severity is mapped geographically, parcel by parcel — not by neighborhood and not by ZIP code. Two houses on the same street can carry different designations. Anyone who gives you a single zone for a whole neighborhood is guessing. Look the address up on the CAL FIRE / Office of the State Fire Marshal hazard zone viewer, and confirm against the Los Angeles Fire Department Fire Zone Map and the city’s ZIMAS parcel system before you remove a contingency.

Three tiers where there used to be one

On March 24, 2025, CAL FIRE and the Office of the State Fire Marshal released updated Local Responsibility Area maps covering the City of Los Angeles — the first update in over a decade. They map three tiers: Moderate, High and Very High. Earlier city maps showed only Very High, so Moderate and High are categories that did not previously exist inside city limits. A parcel newly showing “Moderate” has not been downgraded; it has been placed in a category that is new.

A city can raise a zone, never lower it

State law lets a local agency increase a state-recommended hazard level but not decrease it, and Los Angeles is required to adopt the recommended maps by ordinance. Confirm the current adopted status rather than assuming — this was still moving through the city process as of the most recent public record I could verify.

What the zone does not account for

Designations are built from fuels, terrain, weather and fire history over a 30-to-50-year horizon. They deliberately do not credit home hardening, defensible space, or past fuel treatment on a given property. A well-hardened home in a Very High zone is still in a Very High zone — which matters for how you should think about both the map and the mitigation.

The disclosures that attach

California Civil Code section 1103 and following require a Natural Hazard Disclosure Statement, including whether a property sits in a Very High Fire Hazard Severity Zone. Civil Code section 1102.6f, added by AB 38, layers on defensible-space and home-hardening disclosure for listings in high or very high zones. Read these as data, not paperwork.

Defensible space is already the law

California Public Resources Code 4291 requires 100 feet of defensible space around structures in these areas. That one is in effect now, and it is the first thing an insurer's inspector looks at.

“Zone 0” is coming, but is not law yet

The proposed ember-resistant zone — the first five feet around a house, kept clear of anything that burns — was created by AB 3074 in 2020 and reshaped by SB 504 (2024), AB 1455 (2025) and Executive Order N-18-25. The Board of Forestry's April 17, 2026 draft proposes phased implementation and is still a draft. Anyone telling you Zone 0 is already mandatory statewide is ahead of the record.

The FAIR Plan is a backstop, not a bargain

It is an involuntary pool shared by every insurer licensed to write basic property insurance in California — not a state agency, and not funded by taxpayers. Its residential exposure grew 424% between September 2020 and June 2025, reaching $603 billion, with roughly 573,700 policies in force as of March 2025. It is the insurer of last resort, and it is priced like it.

The rules for insurers changed too

Under the Department of Insurance's Sustainable Insurance Strategy, the wildfire catastrophe-modeling regulation was announced December 13, 2024, with reinsurance and ratemaking regulations submitted for approval December 30, 2024. Insurers gained the ability to use catastrophe models in setting rates in exchange for commitments to write in distressed wildfire areas.

Sources: CAL FIRE / Office of the State Fire Marshal fire hazard severity zone maps (March 24, 2025 Los Angeles County release); California Public Resources Code 4291; California Board of Forestry and Fire Protection Zone 0 rulemaking record; California FAIR Plan; California Department of Insurance Sustainable Insurance Strategy. Zone designations and insurance availability change — verify at the parcel and in writing before removing contingencies. Educational information, not insurance advice.

Common questions

Porter Ranch, answered.

What fire hazard severity zone is Porter Ranch in?

There is no single answer for the neighborhood, and that is the important part. Fire hazard severity zones are mapped parcel by parcel from terrain, fuels, weather and fire history — not by neighborhood or ZIP code. Look up the specific address on the CAL FIRE / Office of the State Fire Marshal hazard zone viewer and confirm it against the LAFD Fire Zone Map and the city’s ZIMAS parcel system. Any agent quoting one zone for all of Porter Ranch is guessing.

What changed in the March 2025 fire hazard maps?

On March 24, 2025 CAL FIRE and the Office of the State Fire Marshal released updated Local Responsibility Area maps for the City of Los Angeles, the first update in more than a decade. The significant change is that they map three tiers — Moderate, High and Very High — where earlier city maps mapped only Very High. So a parcel showing Moderate today is in a category that did not exist before, not one that was reduced.

What do I need to know about Aliso Canyon before buying here?

The verifiable facts: a blowout at well SS-25 began October 23, 2015 and was permanently sealed February 11, 2016, the largest known methane release in U.S. history. Sempra and SoCalGas settled claims of more than 35,000 claimants for approximately $1.8 billion, and a Los Angeles County and State action settled for $119.5 million including safety upgrades. A long-term UCLA health study, funded by SoCalGas, is overseen by the county Department of Public Health. Beyond that, rely on your statutory disclosure package and your own advisors — not on any agent’s characterization of air quality or property values, including mine.

Is the Aliso Canyon facility closing?

Not on any announced date. The facility is still operating. CPUC Decision 24-12-076, issued in December 2024, set a framework aimed at eventually eliminating reliance on it, using a peak-day demand threshold of 4,121 MMcf/d and biennial assessments, with the first assessment issued in 2025. That is a path, not a closure date.

What school district serves Porter Ranch?

Los Angeles Unified. Porter Ranch Community School serves K–8, Castlebay Lane Charter is an LAUSD-affiliated charter elementary located in the neighborhood, and many families feed to Granada Hills Charter at 10535 Zelzah Avenue. Attendance boundaries change, so verify assignment at the specific parcel before you rely on it.

Why do Porter Ranch market numbers seem inconsistent?

Because the 91326 ZIP boundary and the Porter Ranch neighborhood boundary are not the same shape, and some homes marketed as Porter Ranch carry Northridge or Granada Hills ZIPs. A ZIP-level median therefore averages homes buyers would never treat as substitutes. Ask for comparables drawn from the actual streets and product type, and ask to see the set.

What is the Porter Ranch Specific Plan?

A land-use rulebook written for this area specifically, adopted by City Ordinance No. 166,068 in 1990 and amended in 2001 by Ordinances 173,871 through 173,873. It governs land use and circulation here on top of ordinary zoning, which means questions about what can be built on or near a parcel are answered by that document rather than by a general zoning map.