Diana J Marshall

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

Salesperson (CA: 01236155)

28 years experience

REALTOR® 31 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
diana-re@hotmail.com
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)

$1,268,273
Avg. Listing Price
From Diana's portfolio
3.7 / 2.8
Avg. Beds/Baths
Typical property size
2,320 sf
Avg. Square Footage
Interior living space
1999
Active Listings
Current inventory

Professionals who need direct access to working real estate agents in Contra Costa County turn to this list for one reason: it gets results. Mortgage lenders, title companies, and insurance providers use it to pitch services directly to the agents who influence their clients' decisions. PropTech companies rely on it to demonstrate tools to an active, local audience. Recruiters use it to identify experienced agents worth poaching. Continuing education providers use it to fill course seats before license renewal deadlines hit.

When you buy a Contra Costa County real estate agent email list, you are not guessing at who works in this market — you are reaching {{AGENT_COUNT}} verified, actively licensed agents with confirmed email addresses, plus {{CELL_COUNT}} agents who also have cell phone numbers on file. That combination of volume and verification is what separates a productive campaign from a wasted budget.

Why Buy a Contra Costa County Real Estate Agent Email List From Dr Bill

Every record in this list is sourced directly from the California Department of Real Estate licensing database, so you are never working with fabricated or scraped data. New emails are added weekly, the full list is cleaned monthly, and the entire dataset is rebuilt from scratch twice a year. That discipline produces a 96% deliverability guarantee — a number that cheap list vendors simply cannot match because they are not doing the ongoing maintenance required to earn it.

Dr. Bill has been in this business since 2005 and has sold over 31,000 lists in that time. The experience shows in the structure of the data. You can filter by state, county, city, or zip code — and no other vendor offers zip code-level segmentation within Contra Costa County. That granularity alone justifies the purchase for anyone running a geographically targeted campaign.

How to Use This Contra Costa County Agent List

Cold email is the most scalable use case. Load the list directly into platforms built for outreach at volume — Zap Contact at zapcontact.com is purpose-built for this and handles deliverability, follow-up sequences, and compliance cleanly. Beyond email, the cell phone data supports direct SMS or call campaigns, and the full records can be used for LinkedIn audience matching to reinforce your message across channels.

Segmenting by license type sharpens your results significantly. Separating broker licensees from sales agents lets you tailor your pitch — brokers control vendor relationships and influence entire offices, while sales agents are often the better target for individual services like CE courses or personal insurance products. Direct mail append is also available for campaigns that benefit from a physical touchpoint.

Why Contra Costa County, California Agent Data Matters

Contra Costa County covers a diverse and densely populated stretch of the East Bay, including active markets in Walnut Creek, Concord, Antioch, Richmond, Brentwood, and Pleasant Hill. Each city has its own agent community, transaction volume, and buyer profile. A campaign built on zip-level targeting inside this county reaches the right agents in the right submarkets instead of drowning your message in a statewide blast.

With {{AGENT_COUNT}} actively licensed agents operating across these cities, the addressable audience here is substantial enough to support serious outreach campaigns. Local targeting at this scale means your cost per meaningful contact drops while your relevance to the recipient goes up — which is exactly why county-level lists consistently outperform broader geographic pulls.

Current Property Listings

As of 6/27/2026, Diana Marshall has 31 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: 0
Lot: 11,805 sf
Land Map
View Full Details

$415,000

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

$90,000

Listed 2025-08-11

3001 Simpson Stuart Rd
Dallas, TX  75241

Beds:
Baths:
Sq Ft: 0
Lot: 22,216 sf
Land Map
View Full Details

$195,000

Listed 2025-10-30

Irone Ave
Rosamond, CA  93560

Beds:
Baths:
Sq Ft: 0
Lot: 108,900 sf
Land Map
View Full Details

$10,800

Listed 2026-03-16

W Cor Ave # C12
Lancaster, CA  93536

Beds:
Baths:
Sq Ft: 0
Lot: 99,317 sf
Land Map
View Full Details

$18,000

Listed 2025-05-23

W Vic Ave # E12
Lancaster, CA  93536

Beds:
Baths:
Sq Ft: 0
Lot: 437,778 sf
Land Map
View Full Details

$5,000

Listed 2025-05-23

Cor Ave # A10
Lancaster, CA  93536

Beds:
Baths:
Sq Ft: 0
Lot: 108,464 sf
Land Map
View Full Details

$12,500

Listed 2025-06-30

Vic # I10
Lancaster, CA  93535

Beds:
Baths:
Sq Ft: 0
Lot: 226,076 sf
Land Map
View Full Details

$213,000

Listed 2026-02-05

Randsburg Cutoff Rd
Tehachapi, CA  93561

Beds:
Baths:
Sq Ft: 0
Lot: 3,108,006 sf
Land Map
View Full Details

$29,500

Listed 2024-06-21

E 168th St
Palmdale, CA  93591

Beds:
Baths:
Sq Ft: 0
Lot: 220,849 sf
Land Map
View Full Details

Current Property Rentals

As of 6/27/2026, Diana Marshall has the following rental properties available in San Ramon and surrounding areas. These are the top 10 listings.

$2,650

Listed 2026-06-17

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