Justin Flanagan

Justin Flanagan
Real Estate Agent (Salesperson)
Houston TX

Salesperson (TX: 0578556)

19 years experience

REALTOR® 2 Active Listings Serves Harris County, TX
View on Realtor.com

Contact Information

Brokerage
Exp Realty Llc
Office Address
One Riverway Ste 1700
Houston, TX  77056
(Harris County)
Office Phone
888-519-7431
Office Fax
Mobile
281-698-7787
Email
justin@topmarkrealty.com

Service Areas

Cinco Ranch: TX Park Row: TX Fulshear: TX Houston: TX Katy: TX Barker: TX Simonton: TX Weston Lakes: TX Richmond: TX Pecan Grove: TX Cumings: TX Booth: TX Fairchilds: TX Thompsons: TX Clodine: TX Rosenberg: TX Sugar Land: TX Pleak: TX Bunker Hill Village: TX Hunters Creek Village: TX Piney Point Village: TX Hedwig Village: TX Cypress: TX Galveston: TX Jamaica Beach: TX Texas City: TX Tiki Island: TX Pearland: TX Brookside Village: TX Manvel: TX Hitchcock: TX Bayou Vista: TX Spring Valley Village: TX Hilshire Village: TX Orchard: TX Missouri City: TX Sienna: TX Fresno: TX Brookshire: TX Pattison: TX San Felipe: TX Wallis: TX Shenandoah: TX Oak Ridge North: TX The Woodlands Cust: TX The Woodlands: TX Spring: TX

About Justin Flanagan

Topmark Realty, a distinguished office within Keller Williams, is spearheaded by Justin Flanagan and serves the vibrant Katy, TX real estate market. Driven by a desire to give back and share the benefits of Keller Williams, Flanagan established Topmark Realty to cultivate a team of dedicated real estate professionals who embody integrity and a commitment to client service.

Under Flanagan's leadership, Topmark Realty has assembled a group of experts ready to assist families, individuals, and investors in navigating the complexities of buying and selling homes and investment properties in Katy. The fast-paced nature of the Katy real estate market necessitates skilled professionals who can effectively identify favorable opportunities for their clients.

As a proud extension of Keller Williams Signature, Topmark Realty operates with the same high standards of integrity and professionalism that characterize its parent office. Being part of one of the largest and most successful real estate networks globally instills a sense of trust in clients seeking assistance from Topmark Realty agents. Each member of the Topmark team undergoes rigorous training through Keller Williams to ensure they meet the high expectations set by the organization.

For those looking to engage with top-tier real estate professionals in Katy, Topmark Realty stands ready to provide exceptional service. Contact Topmark Realty today to schedule an appointment with one of their knowledgeable agents.

Harris County, TX Real Estate Market Analysis (Single Family Homes)

$487,691
Avg. Listing Price
From Justin's portfolio
3.6 / 3.0
Avg. Beds/Baths
Typical property size
2,400 sf
Avg. Square Footage
Interior living space
18698
Active Listings
Current inventory

If you need to reach working real estate agents in the Houston metro, this list was built for you. Mortgage lenders, title companies, PropTech platforms, insurance providers, continuing education companies, and recruiters all buy Harris County real estate agent email list data to get in front of licensed professionals who are actively closing deals and consistently looking for tools, services, and partnerships that help them do it better.

Harris County is one of the most competitive real estate markets in the country, and the professionals operating inside it are worth reaching directly. Whether you are pitching E&O insurance, a new transaction management platform, a CE course, or a recruitment opportunity, this list gives you a direct line to {{AGENT_COUNT}} verified, actively licensed agents — including {{CELL_COUNT}} with cell phone numbers on file for SMS or direct dial campaigns.

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

Every record in this database is sourced directly from the Texas Real Estate Commission, the official state licensing authority — not scraped from third-party directories or aggregated from stale web data. Emails are cleaned monthly, new contacts are added weekly, and the entire database is fully refreshed twice a year. The result is a 96% deliverability guarantee that cheap list vendors simply cannot match, because they are not doing the maintenance work required to back that number up.

Dr Bill has been selling real estate agent email lists since 2005 with over 31,000 lists sold across the country. That track record means the data standards, the update cycles, and the deliverability guarantee are proven at scale. You are not gambling on a CSV file from an unknown source — you are buying from the most experienced vendor in this space.

How to Use This Harris County Agent List

The most common use case is cold email outreach through platforms like Zap Contact (zapcontact.com), which are purpose-built to send compliant, high-volume prospecting campaigns to professional audiences. The list is formatted to load directly into cold-email platforms so you can be sending within hours of purchase. You can also use it for direct mail, LinkedIn audience matching, or live phone outreach using the included cell numbers.

Smart buyers segment the data before they launch. Separating broker licensees from sales agents, for example, lets you tailor your message — a recruitment pitch lands differently with a broker than it does with a first-year agent. The list supports that kind of targeting out of the box.

Why Harris County, Texas Agent Data Matters

Harris County encompasses Houston and dozens of surrounding cities including Pasadena, Baytown, Humble, Katy, and Sugar Land. With {{AGENT_COUNT}} actively licensed agents concentrated in a single county, the density of opportunity here is unusually high. No other vendor offers zip-code-level segmentation within Harris County — meaning you can target agents in a specific neighborhood or corridor rather than blasting the entire metro.

Statewide Texas lists are broad by necessity. A Harris County-specific list lets you focus your budget, improve response rates, and speak to the local context your prospects actually care about. Precision targeting at the county and zip level is the difference between a campaign that converts and one that gets ignored.

Current Property Listings

As of 6/27/2026, Justin Flanagan has 2 properties for sale in Houston and surrounding areas.

$324,990

Listed 2026-03-25

40203 Bay Warbler Way
Magnolia, TX  77354

Beds: 4.0
Baths: 3.0
Sq Ft: 2,642
Lot: 6,412 sf
Single Family Map
View Full Details

$599,000

Listed 2025-03-29

274 Robinson Tract
Livingston, TX  77351

Beds: 3.0
Baths: 2.0
Sq Ft: 2,411
Lot: 249,163 sf
Single Family Map
View Full Details

Current Property Rentals

Justin Flanagan currently has no rental properties available in Houston and surrounding areas. Check back later.