Silverthorne is one of Simi Valley's distinct gated communities — a single guarded entry, no through traffic, and larger two-story homes built between 1996 and 2004 near the Wood Ranch boundary. It draws buyers who want a gated setting and more square footage than a standard tract on the city's northwest side. I'm Brian Cooper, REALTOR®, DRE# 01434286, and I sell Silverthorne alongside Wood Ranch, Big Sky, and the surrounding Simi Valley neighborhoods.
Where Silverthorne sits
Silverthorne is a gated community built between 1996 and 2004 in northwest Simi Valley, near the Wood Ranch boundary. It has a single guarded entry, internal streets with no through traffic, and shared amenities including a small pool and tot lot. Access is via the 118 freeway and the Erringer, Madera, or Tapo Canyon corridors depending on entry point.
The combination of a gated perimeter, larger-than-tract lots, and a quiet internal street layout is the draw. It sits close enough to Wood Ranch to share much of that area's commute and lifestyle profile while occupying its own price band and school zone.
Homes, lots, and builder history
Silverthorne was built primarily by Standard Pacific along with other builders, in the 1996–2004 window. The housing stock is consistent: two-story floor plans ranging roughly 2,500 to 3,600 square feet, typically four to five bedrooms, on lots of 7,000 to 12,000 square feet — larger than the Simi Valley tract average.
Because the community was built in a relatively tight window by a small number of builders, resale homes are fairly comparable in age and structure, which makes pricing more predictable than in a mixed-vintage neighborhood. Condition and updates are the main differentiators between otherwise similar floor plans.
HOA, gated entry, and Mello-Roos
Silverthorne's HOA runs approximately $165–$220 per month and funds the guarded entry, the private internal streets, and shared amenities. As with any gated community, confirm exactly what the dues cover and review the HOA's reserve study and any pending special assessments during your contingency period.
The community also carries Mello-Roos (a Community Facilities District special tax) of roughly $1,400–$2,000 per year. Mello-Roos is a real, ongoing line item on top of base property tax, so factor it into your monthly budget and confirm the current amount and remaining term for the specific parcel.
- Single guarded entry, no through traffic
- HOA approx $165–$220/mo — confirm what it covers
- Mello-Roos approx $1,400–$2,000/yr — confirm amount and remaining term
- Small pool and tot lot among shared amenities
- Review HOA reserves and any special assessments in escrow
Schools
Silverthorne is served by Simi Valley Unified School District, with Madera Elementary, Sinaloa Middle, and Royal High the typical assignments. Boundaries can change, so confirm the current assignment for the exact address at the district before relying on a school in your decision. I do not steer buyers toward or away from particular campuses.
Pricing and the market
The May 2026 median sale price in Silverthorne is approximately $1,220,000, with most homes trading in roughly the $1.0M–$1.4M band depending on size, lot, and condition. Because the homes are comparable in age and footprint, the spread is narrower than in a mixed neighborhood, and updates and lot position do much of the work in setting value.
Gated, larger-home communities like this tend to attract move-up buyers and tend to hold value well, but inventory is limited — often only a handful of homes available at a time. Use the live search for current listings, or contact me for coming-soon and off-market options.
Who Silverthorne fits
Silverthorne fits a buyer who wants a gated setting, a larger two-story home, and a quiet internal street layout on the northwest side of Simi Valley, and who is comfortable with the HOA-plus-Mello-Roos cost structure. Wood Ranch is the most common alternative buyers weigh against it — generally a step up in price and amenities — while standard Simi tracts offer lower carrying costs without the gate.
If you are comparing Silverthorne to Wood Ranch, Big Sky, or non-gated tracts, I will lay out the real monthly-cost differences, including HOA and Mello-Roos, so the comparison is apples to apples.
Frequently Asked Questions
Is Silverthorne a gated community?
Yes. Silverthorne is a gated community in northwest Simi Valley with a single guarded entry, internal streets with no through traffic, and shared amenities including a small pool and tot lot. The HOA funds the gated entry and runs approximately $165–$220 per month.
When was Silverthorne built and by whom?
Silverthorne was built between 1996 and 2004, primarily by Standard Pacific along with other builders. The homes are consistent two-story floor plans, which makes resale pricing relatively predictable.
How much do Silverthorne homes cost?
The May 2026 median sale price is approximately $1,220,000, with most homes trading in roughly the $1.0M–$1.4M range depending on size, lot, and condition. Inventory is limited — check the live search for current listings.
What are the HOA dues and Mello-Roos in Silverthorne?
HOA dues run approximately $165–$220 per month for the guarded entry and shared amenities. Mello-Roos (a Community Facilities District special tax) runs roughly $1,400–$2,000 per year on top of base property tax. Confirm the current amounts and the remaining Mello-Roos term for the specific parcel.
What size are Silverthorne homes and lots?
Homes are two-story, roughly 2,500–3,600 square feet with four to five bedrooms, on lots of 7,000–12,000 square feet — larger than the Simi Valley tract average.
What schools serve Silverthorne?
Silverthorne is in Simi Valley Unified School District, with Madera Elementary, Sinaloa Middle, and Royal High the typical assignments. Confirm the current assignment for the exact address at the district, as boundaries can change.
Where is Silverthorne in Simi Valley?
Silverthorne is in northwest Simi Valley near the Wood Ranch boundary, with access via the 118 freeway and the Erringer, Madera, or Tapo Canyon corridors depending on entry point.
How does Silverthorne compare to Wood Ranch?
Wood Ranch is generally a step up in price and amenities, while Silverthorne offers a gated setting and larger homes at a lower entry point. Standard Simi tracts offer lower carrying costs without the gate or Mello-Roos. Compare the full monthly cost — including HOA and Mello-Roos — when weighing them.
