MARKET SNAPSHOT
- ?Sold Listings
- ?Average Sales Price
- ?Average Days on Market
- Any
- $ 100,000
- $ 150,000
- $ 200,000
- $ 400,000
- $ 800,000
- Any
- $ 200,000
- $ 300,000
- $ 400,000
- $ 600,000
- $ 1,000,000
- List
- Mixed
- Map
12 Properties Available
- Default
- Price-High To Low
- Price-Low To High
- Newest Listings
- Beds (Most)
- Baths (Most)
- Year Built (Newest)
- Square Feet (Biggest)
1507 Kiowa Crest DR, Diamond Bar, CA 91765
MLS# PW26081692 Listed by Austin Choi of Coldwell Banker Best Realty$1,288,800
2740 Shadow Canyon, Diamond Bar, CA 91765
MLS# OC26086820 Listed by Jason ODonnell of O'Donnell Real Estate$3,990,000
24340 Sylvan Glen RD, Diamond Bar, CA 91765
MLS# CV26066095 Listed by Robert Lara of REDFIN CORPORATION$1,250,000
24301 Sunnycrest CT, Diamond Bar, CA 91765
MLS# OC26071539 Listed by Anqi Fan of Realty One Group West$1,524,999
$3,998,800
24242 Sylvan Glen RD #G, Diamond Bar, CA 91765
MLS# SR26058308 Listed by Laura Getzoff of RE/MAX One$549,999
21535 Chirping Sparrow, Diamond Bar, CA 91765
MLS# TR26051137 Listed by Simon Dong of 168 Realty Inc.$1,738,000
1920 Flint Rock RD, Diamond Bar, CA 91765
MLS# OC26054191 Listed by Dana Malm of First Team Real Estate$1,898,000
2820 Shadow Canyon DR, Diamond Bar, CA 91765
MLS# PW26032150 Listed by Harvey Vargas of First Team Real Estate$4,200,000
1511 Deer Crossing, Diamond Bar, CA 91765
MLS# CV26015682 Listed by Michelle Bracco of Elevate Real Estate Agency$1,475,000
2809 Oak Knoll DR, Diamond Bar, CA 91765
MLS# TR25177839 Listed by Sanne Lee of A + Realty & Mortgage$4,880,000
22189 Rim Fire LN, Diamond Bar, CA 91765
MLS# TR25126245 Listed by Diana Cheng of Country Queen Real Estate$3,980,000
- 1
MORTGAGE CALCULATOR

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Market Trends
- Average Sold Price
- Median Sold Price
- Highest Sold Price
- Lowest Sold Price
Market Trends are calculated using MLS® sold listing data
Katy Costello is a dedicated real estate professional with nearly a decade of experience, beginning her career in 2015 in Phoenix, Arizona, before relocating to Orange County, California. Passionate about helping clients build wealth through real estate, she is known for her meticulous research, relentless dedication, and commitment to maintaining the highest standards of integrity in every transaction.
Katy ensures that each client experience is marked by trust, professionalism, and exceptional service. Her approach combines deep market knowledge with a steadfast commitment to helping clients achieve their real estate goals, whether they are buying, selling, or investing.
Outside of her work in California, Katy and her partner Jaime are expecting their first child building their first Airbnb property in El Sargento, Baja California Sur, Mexico. In their free time, they enjoy fishing, exploring the local culture, and indulging in the area's vibrant cuisine.
Katy’s personal and professional experiences fuel her passion for real estate, and she is dedicated to making every client's journey seamless and successful







