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John Denman Mahon Jr

John Denman Mahon Jr
Real Estate Agent (Management Level Salesperson)
Columbus OH

Management Level Salesperson (OH: 2015002818)

10 years experience

REALTOR® 2 Active Listings Serves Franklin County, OH
View on Realtor.com

Contact Information

Brokerage
Casto Residential Realty

Office Website
Office Address
250 Civic Ctr Dr Ste 500
Columbus, OH  43215-5088
(Franklin County)
Office Phone
614-744-2098
Office Fax
614-229-4330
Mobile
614-354-1272
Email
jdmjr1221@gmail.com

Service Areas

Westerville: OH Harlem Township: OH Dublin: OH Columbus: OH Hilliard: OH Amlin: OH Riverlea: OH Worthington: OH Upper Arlington: OH Marble Cliff: OH Grandview Heights: OH Huber Ridge: OH New Albany: OH Gahanna: OH Blacklick: OH Reynoldsburg: OH Pataskala: OH Brice: OH Obetz: OH Blacklick Estates: OH Whitehall: OH Bexley: OH Valleyview: OH New Rome: OH Lincoln Village: OH Groveport: OH Canal Winchester: OH Darbydale: OH Grove City: OH Urbancrest: OH Minerva Park: OH

About John Mahon

John is dedicated to exploring innovative avenues that enable clients to discover their ideal homes and assist investors in identifying properties that align with their objectives.

With a deep understanding of the Columbus real estate market, John prioritizes the diverse needs of clients, ensuring they find the perfect home at the right price. For investors, [he/she/they] focuses on sourcing premier properties that cater to their unique lifestyles and aspirations.

Having grown up in a family immersed in real estate, John brings a lifetime of industry insight to [his/her/their] role as a professional Realtor®. [His/Her/Their] experience managing a family investment portfolio has equipped [him/her/them] with valuable skills that benefit homebuyers throughout Central Ohio.

John leverages [his/her/their] background in real estate investment to educate clients on home renovations and provide trusted vendor recommendations, ensuring they make informed decisions.

At the core of [his/her/their] work is a commitment to realizing clients' dreams of homeownership. John views being a Realtor® as more than just a profession; it is a way of life. Always accessible, [he/she/they] believes in maintaining open lines of communication, ensuring that clients feel supported throughout their journey. John takes pride in delivering results that meet and exceed client expectations.

Franklin County, OH Real Estate Market Analysis (Single Family Homes)

$440,503
Avg. Listing Price
From John's portfolio
3.3 / 2.4
Avg. Beds/Baths
Typical property size
1,996 sf
Avg. Square Footage
Interior living space
3190
Active Listings
Current inventory

Mortgage lenders, title companies, and PropTech startups rely on targeted real estate agent email lists to connect with licensed professionals who drive property transactions in Franklin County, Ohio. Insurance brokers, continuing education providers, and recruiting firms also leverage these verified contact databases to reach the 9,136 actively licensed agents who need their services, products, and career opportunities.

Rather than wasting marketing budgets on broad demographic targeting that reaches random consumers, savvy businesses invest in precise professional databases that connect them directly with decision-makers in the real estate industry. Franklin County's robust agent population represents one of Ohio's most active real estate markets, making it essential for B2B companies to access current, verified contact information for licensed professionals in this high-opportunity region.

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Dr Bill sources all agent data directly from Ohio's state licensing boards, ensuring every contact represents a currently licensed, actively practicing real estate professional. While cheap list vendors scrape outdated information from public websites, our database receives monthly updates and maintains a 96% deliverability guarantee, eliminating the wasted spend and reputation damage that comes from bounced emails and invalid contacts.

This Franklin County database contains verified email addresses, phone numbers, and mailing addresses for all 9,136 licensed agents, available for purchase at state, county, city, or individual zip code levels. No other vendor offers zip code-level segmentation within Franklin County, giving you unprecedented targeting precision for localized marketing campaigns that speak directly to agents working specific territories and neighborhoods.

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Email outreach remains the most cost-effective way to reach real estate professionals, but mainstream platforms like Mailchimp and Constant Contact prohibit purchased lists in their terms of service. Cold-email platforms designed for B2B prospecting handle purchased data legally and effectively, with Zap Contact (zapcontact.com) serving as Dr Bill's purpose-built platform specifically optimized for purchased professional lists and compliance management.

Beyond email campaigns, this verified database supports direct mail pieces, phone prospecting, and LinkedIn connection strategies that help you build relationships with agents across Franklin County. You can segment contacts by broker versus sales agent status, target specific cities or zip codes, or create customized campaigns for different service offerings that match each agent's potential needs and transaction volume.

Why Franklin County, Ohio Agent Data Matters

Franklin County encompasses Columbus, Ohio's capital and largest city, plus growing communities like Dublin, Westerville, Reynoldsburg, and Gahanna where active real estate professionals serve diverse market segments. With 9,136 licensed agents concentrated in this single county, you're accessing one of the Midwest's most robust real estate markets without paying for statewide coverage that includes rural areas with minimal agent activity.

Local targeting consistently outperforms broad geographic campaigns because agents respond better to vendors who understand their specific market conditions and neighborhood dynamics. When you buy Franklin County real estate agent email list data, you're investing in precision marketing that acknowledges the unique characteristics of Central Ohio's real estate landscape and the professionals who navigate it daily.

Current Property Listings

As of 5/29/2026, John Mahon has 2 properties for sale in Columbus and surrounding areas.

$1,495,000

Listed 2026-05-08

2771 Scioto Villas Dr
Upper Arlington, OH  43221

Beds: 4.0
Baths: 5.0
Sq Ft: 4,304
Lot: 3,049 sf
Single Family Map
View Full Details

$795,000

Listed 2026-04-27

1955 Rosebery Dr
Upper Arlington, OH  43220

Beds: 4.0
Baths: 2.5
Sq Ft: 2,767
Lot: 13,504 sf
Single Family Map
View Full Details

Current Property Rentals

John Mahon currently has no rental properties available in Columbus and surrounding areas. Check back later.