MARKET SNAPSHOT
- ?Sold Listings
- ?Average Sales Price
- ?Average Days on Market


78 Properties Available
- Default
- Price-High To Low
- Price-Low To High
- Newest Listings
- Beds (Most)
- Baths (Most)
- Year Built (Newest)
- Square Feet (Biggest)
- 1/39 39Price Dropped by $49K
$ 1,150,000
4 Beds3 Baths2,843 SqFt5171 Keller Ridge Dr, Clayton, CA 94517
Single Family Home
Listed by Julie Rogers of Weichert Realtors-America Fir
- 3DPending
$ 548,000
2 Beds1 Bath805 SqFt3010 Mount Diablo St, Concord, CA 94518
Single Family Home
Listed by Sheila Zarekari of Keller Williams Realty
- Active
$ 139,000
1.17 AcresClayton, CA 94517-9748
Vacant Land
Listed by Mike Williams of Town & Country Realty
- 1/4 4Active
$ 1,500
0.39 Acres Lot6160 Center St #F, Clayton, CA 94517
Commercial
Listed by Jennifer Stojanovich of Better Homes Realty
- 1/17 17Active
$ 1,498,000
1.5 Acres3487 Ramstad DR, San Jose, CA 95127
Vacant Land
Listed by Marc Frost of Redfin
- 1/17 17Active
$ 500,000
8.59 Acres500 Kaiser Quarry Rd, Clayton, CA 94517
Vacant Land
Listed by Tiffany Sutton of Compass
MORTGAGE CALCULATOR

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A for-sale-by-owner (FSBO) transaction requires time, know-how and confidence. If you’re not sure that you have all three, enlisting the services of an advisor — a professional who knows the ins and outs of listing and selling homes successfully — pays off. * Advisors Avoid Emotional Sales
• Advisors Weed Out Unqualified Buyers
• Advisors Negotiate Price
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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