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Dietrich Onnen

Dietrich Onnen
Real Estate Agent
Lutherville Timonium MD

(MD: 648410)

REALTOR® 0 Active Listings Serves Baltimore County, MD
View on Realtor.com

Contact Information

Brokerage
Long & Foster Towson

Office Website
Office Address
1312 Bellona Ave
Lutherville Timonium, MD  21093
(Baltimore County)
Office Phone
410-583-9400
Office Fax
Mobile
410-375-4158
Email
donn***@*****.com
Show Email for $5
Website

Service Areas

Cockeysville: MD Lutherville Timonium: MD Towson: MD Mays Chapel: MD Lutherville: MD Hampton: MD Pikesville: MD Timonium: MD

About Dietrich Onnen

Dietrich Onnen is a seasoned entrepreneur and developer with a keen aptitude for digital strategies. Raised in Baltimore County, he attended The Boys’ Latin School of Maryland for twelve years. He later earned a Bachelor’s degree in Business from Washington College, where he honed his skills and identified his passion for competitive environments that prioritize helping others.

In 2010, Dietrich founded a successful internet marketing firm, which laid the groundwork for his transition into the real estate sector. His extensive knowledge of Baltimore City and County neighborhoods, combined with his expertise in online marketing, sets him apart from many of his peers in the industry. Understanding the importance of a robust online presence, Dietrich is committed to ensuring that clients can secure their dream homes at optimal prices or achieve top dollar for their current properties. With Dietrich as your agent, you can be confident in a strategic and effective approach to your real estate needs.

Baltimore County, MD Real Estate Market Analysis (Single Family Homes)

$575,062
Avg. Listing Price
From Dietrich's portfolio
3.9 / 2.9
Avg. Beds/Baths
Typical property size
2,462 sf
Avg. Square Footage
Interior living space
2062
Active Listings
Current inventory

Mortgage lenders, title companies, PropTech startups, real estate recruiters, insurance agents, and continuing education providers all rely on targeted outreach to Baltimore County's 4,814 actively licensed real estate professionals. This verified email list delivers direct access to agents and brokers who need your services, whether you're offering loan products, closing services, lead generation tools, career opportunities, or professional development courses.

Smart businesses know that broad, untargeted marketing wastes money and delivers poor results. Our Baltimore County real estate agent email list lets you focus your resources on the exact professionals most likely to become clients, partners, or hires. Every email address is verified and actively licensed, ensuring your message reaches decision-makers who can actually respond to your offer.

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

Our data comes directly from Maryland state licensing boards and gets updated monthly, delivering 96% email deliverability that cheap, outdated lists simply cannot match. While competitors sell stale databases scraped from public websites, we maintain fresh contact information for all 4,814 licensed agents in Baltimore County, complete with licensing details and brokerage affiliations that help you craft targeted messages.

You can purchase this data at the state, county, city, or individual zip code level – no other vendor offers zip code granularity within Baltimore County. This precision targeting means higher response rates and better ROI compared to generic statewide blasts that hit agents who will never work in your service area or meet your ideal client profile.

How to Use This Baltimore County Agent List

Email outreach generates the fastest results when you use cold-email platforms designed for purchased lists like Zap Contact (zapcontact.com), Dr Bill's purpose-built system that handles deliverability and compliance automatically. Mainstream platforms like Mailchimp or Constant Contact prohibit purchased lists, but specialized cold-email tools let you launch targeted campaigns immediately while tracking opens, clicks, and responses.

Beyond email marketing, this list powers direct mail campaigns, phone outreach, and LinkedIn connection strategies. You can segment by broker versus sales agent to customize your messaging, or target specific cities within the county based on where your services are strongest. The verified contact data ensures your outreach investments reach real decision-makers instead of bouncing to dead addresses.

Why Baltimore County, Maryland Agent Data Matters

Baltimore County encompasses major markets like Towson, Dundalk, Catonsville, and Pikesville, each with distinct agent populations and service needs. When you buy Baltimore County real estate agent email list data, you're targeting professionals who understand local market conditions and client preferences that differ significantly from other Maryland regions. This geographic focus helps your messaging resonate with agents who actually work where your business operates.

With 4,814 active agents concentrated in this single county, you get substantial market coverage without paying for statewide data that includes agents you'll never work with. Local targeting builds stronger relationships and generates higher conversion rates because agents recognize you understand their specific market area and can deliver relevant value to their business operations.

Current Property Listings

As of 3/27/2026, Dietrich Onnen has 0 properties for sale in Lutherville Timonium and surrounding areas.

$215,000

Listed 2026-03-01

417 Torner Rd
Baltimore, MD  21221

Beds: 3.0
Baths: 1.0
Sq Ft: 1,144
Lot: 1,600 sf
Townhomes Map
View Full Details

$185,000

Listed 2026-02-23

2401 Paper Mill Rd
Phoenix, MD  21131

Beds:
Baths:
Sq Ft:
Lot: 135,036 sf
Land Map
View Full Details

$499,000

Listed 2026-03-01

2120 Blue Mount Rd
Monkton, MD  21111

Beds: 3.0
Baths: 2.0
Sq Ft: 1,280
Lot: 145,926 sf
Single Family Map
View Full Details

Current Property Rentals

Dietrich Onnen currently has no rental properties available in Lutherville Timonium and surrounding areas. Check back later.