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- Listed price
- $3,070,000
- Listed Oct 18, 2026 · $389/sq ft
- Last sold price
- No recorded sale
6 beds|8 ba|7,884 sqft|47,743 sqft lot|1987 Built|5 MLS days on market
23240 Ridge Line, Diamond Bar, CA 91765
Property Description
Highly motivated seller ready to make a quick sale-bring your serios offers today! Located within Diamond Bar’s prestigious guard-gated community of "The Country," this magnificent custom estate offers an extraordinary blend of luxury, scale, and breathtaking mountain views. Spanning an expansive '7,884 sq. ft."' of living space, the residence features "6 bedrooms and 8 bathrooms", along with a convenient elevator servicing all 4 levels plus an upper loft. Designed for grand entertaining and modern living, the home highlights " a rare indoor basketball court with high ceilings"—easily adaptable into a grand game room, home theater, or entertainment hall. Step outside to your private resort-style oasis complete with " an infinity pool "overlooking stunning canyon and mountain vistas. Zoned for the highly acclaimed Walnut Valley Unified School District, this exceptional property delivers ultimate privacy and prestige. Exceptional value and priced for a quick sale.
Listing agent: Julie ChengDRE #02014396julielynncheng@gmail.com, Listing office: Universal Elite Inc.
MLS data updated 10/30/2026, 4:03:11 AM PT
Source: CRMLSMLS #: TR26225673
Belmont insights
Price & property history
Compare recorded home prices, same-type ZIP sales and mortgage rates.
Latest asking price$3,070,000
Oct 18, 2026
Available records12026
From MLS recordsActual listing and closing events
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
$3,070,000Original asking price · Oct 18, 2026ZIP 91765 · Oct 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.This home · 1 price recordsOct 18, 2026 – Oct 18, 2026
ZIP 91765 · same property typeLoading eligible closed sales…
Freddie Mac · national weekly ratesLoading mortgage-rate history…
Recorded sales in this period (0)
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.
View listing & sale records
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.