Direct AnswerThe 118 corridor connects five markets across two counties (June 2026): Moorpark (~$1.02M) and Simi Valley (~$850K) in Ventura County; Chatsworth (~$945K), Northridge (~$1M), and Porter Ranch (~$1.25M) in LA County. The county line at Santa Susana Pass is more than scenery — it switches school districts (SVUSD vs LAUSD), assessors, insurance risk profiles, and buyer pools. Simi Valley is the corridor's value anchor; Porter Ranch its new-construction premium.

Five markets, two counties

MarketMedian priceDays on marketCountySchool district(s)
Moorpark$1,020,00051VenturaMoorpark Unified School District
Simi Valley$850,00018VenturaSimi Valley Unified School District (SVUSD)
Chatsworth$945,00054Los AngelesLos Angeles Unified School District (LAUSD), with several charter options
Northridge$1,000,00044Los AngelesLos Angeles Unified School District (LAUSD), West Valley; Granada Hills Charter High School zoning crossover
Porter Ranch$1,250,00023Los AngelesLos Angeles Unified School District (LAUSD)

Figures from /data.json, the site’s canonical data file (June 2026). Always verify current numbers.

What the county line changes

Crossing Santa Susana Pass eastbound: the assessor becomes LA County, schools become LAUSD (with the West Valley charter network), and you enter the City of LA's transfer-tax regime on most addresses. Westbound into Simi: SVUSD schools, Ventura County services, and generally lower insurance-risk scoring outside the hillside zones. Same freeway, materially different ownership math — Brian runs both county checklists on every corridor deal.

Commute positioning

The 118 is the Valley's least-congested east-west freeway. Porter Ranch to Warner Center runs ~20 min; Simi Valley to Northridge ~25 min off-peak. For buyers working the west Valley, Simi's discount to Porter Ranch (~$400K) buys 15 extra freeway minutes — the corridor's defining trade.

Frequently asked questions

Which 118 corridor market is the best value?

Simi Valley (~$850K median, June 2026) — the corridor's lowest median with its own school district and 280+ days of sun. Chatsworth is the LA-County value pick.

Why is Porter Ranch so much more expensive?

Toll Brothers new construction, gated communities, and post-Aliso Canyon recovery demand — it is the corridor's only large new-build market.

Does the county line really matter?

Yes — district (SVUSD vs LAUSD), assessor, transfer taxes, and insurance profiles all switch at the line. It is the most consequential boundary in the corridor.

Work with Brian Cooper

20+ years and $100M+ closed across Ventura County, the San Fernando Valley, and the Conejo Valley. Direct, data-first representation — you work with Brian, not a hand-off.

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Market figures are approximate and refreshed monthly from MLS and public-record data; school boundaries, tax rates, insurance availability, and program rules change — verify all details independently before making decisions. Brian Cooper, REALTOR® · DRE# 01434286 · eXp Realty · Equal Housing Opportunity.