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Diana J Marshall

Diana J Marshall
Real Estate Agent (Salesperson)
San Ramon CA

Salesperson (CA: 01236155)

28 years experience

REALTOR® 42 Active Listings Serves Contra Costa County, CA
View on Realtor.com

Contact Information

Brokerage
Exp Realty Of California Inc

Office Website
Office Address
2603 Camino Ramon
San Ramon, CA  94583
(Contra Costa County)
Office Phone
888-832-7179
Office Fax
661-297-4934
Mobile
661-203-7310
Email
dian****@*******.com
Show Email for $5
Website

About Diana Marshall

With over two decades of experience as a licensed real estate agent, this professional adeptly navigates a diverse range of real estate transactions, including single-family homes, condominiums, townhouses, manufactured homes, land, and even business sales.

Beginning their career as a real estate assistant, they gained invaluable experience working alongside a leading listing agent and a top buyer’s agent for nearly two years. This foundation allowed them to establish a robust understanding of the Southern California market, encompassing areas such as Kern County, lower Ventura County, San Fernando Valley, parts of San Bernardino County, and the entirety of the Antelope Valley. Their expertise extends to short-sale and REO transactions, complemented by over eight years in property management.

Holding a degree in photojournalism, they have a background in journalism, having worked for a newspaper during their college years. Committed to professional growth, they regularly pursue educational opportunities, attending real estate classes and seminars to stay abreast of industry trends.

Dedicated to community service, they actively participate in the Kern Desert Search and Rescue Unit, California City DIRT, and CERT. Additionally, they are a member of LACDECERT, which focuses on the evacuation and care of large animals during natural disasters, such as the frequent fires in Southern California.

An avid equestrian for over 20 years, they have owned their horse, Wendy, for 17 years. Wendy, a beautiful running quarter horse, is known for her gentle demeanor with both people and other animals. Together, they have been past members of the Marshall Canyon Mounted Assistance Unit.

In addition to their equestrian pursuits, they have a passion for auto racing and have competed in dwarf car racing for several years.

Contra Costa County, CA Real Estate Market Analysis (Single Family Homes)

$1,188,152
Avg. Listing Price
From Diana's portfolio
3.7 / 2.7
Avg. Beds/Baths
Typical property size
2,203 sf
Avg. Square Footage
Interior living space
3220
Active Listings
Current inventory

Contra Costa County's real estate market represents one of the Bay Area's most dynamic and complex landscapes, where suburban family neighborhoods meet industrial corridors and waterfront communities. With 11,034 total actively licensed agents operating throughout the county, this market demonstrates remarkable depth and specialization across diverse price points and property types. The sheer concentration of real estate professionals reflects the county's position as both a residential haven for Bay Area commuters and a standalone economic powerhouse.

What makes Contra Costa County particularly fascinating is its role as a bridge between San Francisco's premium market and the Central Valley's affordability. The county's 11,034 agents with email contact information represent a digitally connected professional network that spans from luxury waterfront properties in Danville to industrial developments in Pittsburg, creating opportunities for sophisticated marketing campaigns and targeted outreach across multiple market segments.

Major Contra Costa County, California Real Estate Markets

The county's real estate activity centers around several distinct metropolitan clusters, each with unique characteristics and agent specializations. Walnut Creek and Concord anchor the central corridor, where agents focus heavily on family housing and commercial development, while Lafayette, Orinda, and Moraga form the prestigious Lamorinda region known for top-rated schools and million-dollar properties. Meanwhile, Antioch and Pittsburg represent the county's most affordable markets, attracting first-time buyers and investors seeking value plays.

Eastern communities like Brentwood and Oakley have emerged as surprising growth engines, where newer construction meets agricultural preservation, creating unique opportunities for agents specializing in suburban expansion markets. The western waterfront areas, including Richmond and Hercules, blend industrial redevelopment with residential gentrification, requiring agents with expertise in both commercial transitions and community revitalization projects.

Market Dynamics and Geographic Complexity

Contra Costa County's market operates on multiple pricing tiers simultaneously, with median home prices varying by over $800,000 between different cities within the same county. This creates distinct agent ecosystems where professionals in Alamo and Danville rarely compete directly with those serving Bay Point or San Pablo, despite operating under the same regional market conditions. The county's BART accessibility significantly influences pricing patterns, with stations in Walnut Creek, Concord, and Pleasant Hill commanding premium valuations.

Agent specialization has become increasingly sophisticated, with many focusing on specific property types rather than geographic territories. Some concentrate on the county's substantial 55+ active adult communities, while others specialize in the region's significant inventory of townhomes and condominiums that serve as entry points for Bay Area professionals. The industrial and logistics sectors, particularly around Highway 4 corridors, support a robust commercial agent network serving warehouse and distribution facility demands.

Why Businesses Need Contra Costa County, California Agent Contact Data

Financial services companies find Contra Costa County's agent database particularly valuable because the market's price diversity creates opportunities across multiple lending products, from FHA loans in eastern communities to jumbo mortgages in central hillside areas. Insurance providers benefit from the county's varied risk profiles, ranging from wildfire-prone hillside properties to flood-consideration areas near the Delta, requiring targeted product offerings for different agent networks.

Technology and service providers discover that Contra Costa County agents operate in a uniquely competitive environment where differentiation matters significantly. With over 11,000 licensed professionals serving diverse communities, agents actively seek tools, marketing services, and platforms that help them stand out in specific neighborhood niches, creating substantial opportunities for B2B companies offering specialized real estate solutions and lead generation services.

Current Property Listings

As of 3/27/2026, Diana Marshall has 42 properties for sale in San Ramon and surrounding areas. These are the top 10 listings.

$65,000

Listed 2025-10-20

1920 Boston St
Laredo, TX  78041

Beds:
Baths:
Sq Ft:
Lot: 11,805 sf
Land Map
View Full Details

$450,000

Listed 2025-11-19

1933 Steppe Trail Dr
Aubrey, TX  76227

Beds: 4.0
Baths: 2.5
Sq Ft: 3,202
Lot: 7,144 sf
Single Family Map
View Full Details

$395,000

Listed 2026-03-13

916 Falcon Rd
Argyle, TX  76226

Beds: 3.0
Baths: 2.0
Sq Ft: 1,872
Lot: 5,750 sf
Single Family Map
View Full Details

$120,000

Listed 2025-08-11

3001 Simpson Stuart Rd
Dallas, TX  75241

Beds:
Baths:
Sq Ft:
Lot: 22,216 sf
Land Map
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$22,500

Listed 2026-01-29

Vic Ave # E2
High Vista, CA  93535

Beds:
Baths:
Sq Ft:
Lot: 223,027 sf
Land Map
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$78,600

Listed 2026-01-14

Vic Ave # D12
Lancaster, CA  93535

Beds:
Baths:
Sq Ft:
Lot: 453,460 sf
Land Map
View Full Details

$10,000

Listed 2024-06-21

Vic P Ave
Lancaster, CA  93535

Beds:
Baths:
Sq Ft:
Lot: 114,998 sf
Land Map
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$8,950

Listed 2024-03-25

Vic Ave # D10
Lancaster, CA  93535

Beds:
Baths:
Sq Ft:
Lot: 111,949 sf
Land Map
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$64,950

Listed 2024-08-30

Vic Ave # I4
Lancaster, CA  93535

Beds:
Baths:
Sq Ft:
Lot: 1,346,004 sf
Land Map
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$22,500

Listed 2025-11-03

Vic Aveune # 12
Lancaster, CA  93536

Beds:
Baths:
Sq Ft:
Lot: 54,886 sf
Land Map
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Current Property Rentals

Diana Marshall currently has no rental properties available in San Ramon and surrounding areas. Check back later.