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An outstanding architectural opportunity: the Ain/Koenig residence has only been on the market 3 times in 70 years. This mid-century oasis was built by two legendary architects for Ben Margolis, which started in 1951 and then again in 1992, has been lovingly maintained & restored. The main house by Gregory Ain includes the original features of a bright open floor plan, clerestory windows, sliding glass walls, indoor/outdoor flow, and the true mid-century life. The guesthouse & pool by Pierre Koenig adds modernism with all of the original steel beam construction details in its most dynamic form. Civil rights lawyer Margolis, famous for defending the Hollywood 10, contracted Ain to build his personal residence while Koenig a few decades later, enriched the home with an added steel & glass guesthouse nestled into the Hills with views overlooking the pool and city. The property sits behind the gates in The Oaks neighborhood, home to celebrity estates.
Listing agent: Antonia Serrell-Watts DRE #01994445 antonia@asw-agency.com, Listing office: Allison James Estates & Homes
MLS data updated 10/31/2026, 11:44:40 PM PT
Source: CRMLS, MLS #: 20616778
Belmont insights
Compare recorded home prices, same-type ZIP sales and mortgage rates.
Oct 2, 2020
Prices use the left axis; mortgage rates use the right. Hover, tap, or focus the chart and use the arrow keys. Red SOLD badges mark recorded sales.
This home · nearest recorded event
No recordNo property-price record in this range.ZIP 90068 · Nov 2026
No monthly averageAt least 3 eligible sales in this month are required.30-year fixed mortgage benchmark
No weekly rateNo published rate within 7 days of this date.No recorded sales in this range. Select All available for older records; missing records do not mean the home never sold.
ZIP averages use publicly displayable closed sales from our licensed MLS feed, matched to the same ZIP and exact property type. Months with fewer than 3 sales are omitted; the current month is incomplete. Lines connect available monthly observations across gaps and do not represent measured prices in missing months. These averages are not adjusted for size, condition, or location within the ZIP, and are not an appraisal. Feed coverage may not include every sale. All available shows the available home and ZIP history, with mortgage rates over the same dates.
Mortgage benchmark: Freddie Mac Primary Mortgage Market Survey®. © Freddie Mac. Weekly national 30-year fixed rates, not APRs or a loan quote. Actual terms vary. Methodology changed in November 2022. The chart does not establish that interest-rate changes caused a home’s price changes.
Lines connect recorded asking and sale prices. They are visual guides, not estimates of the home’s value between those dates.
No earlier records were returned by our current sources. This does not mean the home has never sold.
MLS records may be incomplete. Earlier asking prices are not sale prices.