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Karen Cushman McMillan
Real Estate Agent (Broker)
Seguin TX

Broker (TX: 0257580)

39 years experience

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

Contact Information

Brokerage
Karen McMillan Realtors

Office Website
Office Address
348 Lake Ridge Dr
Seguin, TX  78155
(Guadalupe County)
Office Phone
830-305-3600
Office Fax
Mobile
830-560-2500
Email
kare*@*************.com
Show Email for $5
Website

Service Areas

Comfort: TX New Berlin: TX La Vernia: TX Leesville: TX Seguin: TX McQueeney: TX Schertz: TX New Braunfels: TX Marion: TX Zuehl: TX Santa Clara: TX Cibolo: TX Nixon: TX Smiley: TX St. Hedwig: TX Geronimo: TX Stockdale: TX Pandora: TX Kingsbury: TX Staples: TX Kyle: TX Redwood: TX San Marcos: TX

About Karen McMillan

With a real estate career spanning over four decades, this seasoned Realtor has been a licensed professional since 1979 and became a Broker in 1986. Having served as President of the Seguin Board of Realtors on two occasions—first in 1998 and again in 2009—she has established herself as a leader in the industry. Her commitment to excellence has been recognized with the Texas Monthly 5 Star Professional Award for five consecutive years from 2013 to 2017.

A dedicated member of the Women's Council of Realtors, she holds several prestigious designations, including Graduate Realtor® Institute (GRI), Council of Real Estate Brokerage Manager (CRB®), and Certified Residential Specialist (CRS®). Additionally, she has obtained Referral and Relocation Certification, further enhancing her expertise.

Beyond her real estate accomplishments, she has contributed to the community through her service on the Seguin City Planning and Zoning Commission from 1983 to 1997. She has also held board positions with Seguin State Bank, the Guadalupe County Chamber of Commerce, and Guadalupe County United Way. Currently, she is actively involved as a board member of Friends of Lake McQueeney (FOLM), the Lake Ridge Homeowners Association, and the Guadalupe Regional Medical Foundation, in addition to being a member of the Shakespeare Literary Club.

Her clients benefit from her unwavering availability and commitment, as she prides herself on being "on call" 24/7. Known for her persistence, determination, and trustworthiness, she emphasizes the importance of achieving results—after all, it’s the SOLD sign that matters. After successfully building her own brokerage for a decade, she made the strategic decision to sell the company in 2014, allowing her to focus more intently on client service and the high-quality experience they expect.

Recognized for her expertise in waterfront properties, she possesses in-depth knowledge of the real estate landscape in Seguin, Lake McQueeney, Lake Placid, New Braunfels, and surrounding areas. With a background as a former classroom teacher and degrees from the University of Texas, she excels in negotiation and is dedicated to educating her clients on every aspect of their real estate transactions.

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

$378,457
Avg. Listing Price
From Karen's portfolio
3.7 / 2.7
Avg. Beds/Baths
Typical property size
2,171 sf
Avg. Square Footage
Interior living space
2093
Active Listings
Current inventory

Guadalupe County, Texas represents one of the fastest-growing real estate markets in the greater San Antonio metropolitan area, driven by its strategic location between Austin and San Antonio along the Interstate 35 corridor. This rapidly expanding market has attracted significant residential and commercial development, particularly in cities like Seguin, Schertz, and New Braunfels, where property values have surged due to population growth and economic diversification beyond traditional agriculture.

The county's real estate landscape is supported by a robust network of 738 total actively licensed agents, with 738 agents maintaining email contact information, indicating a highly connected and digitally engaged professional community. This comprehensive agent coverage reflects the market's sophistication and the increasing demand for real estate services across both established neighborhoods and emerging suburban developments throughout the region.

Major Guadalupe County, Texas Real Estate Markets

New Braunfels serves as the county's largest real estate hub, experiencing explosive growth as young families and retirees relocate from expensive Austin and San Antonio markets. The city's historic downtown charm combined with modern amenities has created a unique market dynamic where luxury homes along the Guadalupe River command premium prices, while new construction neighborhoods attract first-time buyers seeking affordability within commuting distance of major employment centers.

Seguin, the county seat, represents a more traditional market focused on historic properties and agricultural land conversions, while Schertz operates as a bridge market between Guadalupe and Bexar counties. Marion, Geronimo, and other smaller communities are experiencing surprising development pressure as land prices in primary markets push buyers toward previously overlooked rural areas with development potential.

Market Dynamics and Geographic Complexity

Guadalupe County's real estate market exhibits fascinating seasonal patterns tied to both the San Antonio military cycles and Austin's technology sector employment trends. Spring and summer months see intense competition for family homes near top-rated school districts, while fall and winter periods favor luxury properties and investment purchases as relocated professionals settle into new positions.

The market's geographic complexity stems from its position spanning multiple economic zones, from Hill Country recreational properties to suburban commuter communities and rural agricultural land facing development pressure. This diversity creates micro-markets with dramatically different pricing structures, buyer demographics, and transaction timelines, requiring specialized local knowledge that varies significantly even within individual cities.

Why Businesses Need Guadalupe County, Texas Agent Contact Data

Mortgage lenders, title companies, and home service providers require comprehensive agent contact databases to effectively penetrate this fragmented but lucrative market, where referral relationships often determine business success. The county's 738 connected agents represent direct access to buyers and sellers across diverse price points and property types, from affordable starter homes to luxury Hill Country estates.

Marketing professionals and real estate technology companies particularly benefit from complete agent email lists to introduce innovative services and tools that address this market's unique challenges, including rural property assessments, water rights transfers, and multi-jurisdictional transaction coordination that spans different municipalities and regulatory environments.

Current Property Listings

As of 2/13/2026, Karen McMillan has 2 properties for sale in Seguin and surrounding areas.

$725,000

Listed 2026-01-29

202 Wedgewood
Seguin, TX  78155

Beds: 4.0
Baths: 3.0
Sq Ft: 3,661
Lot: 43,530 sf
Single Family Map
View Full Details

$350,000

Listed 2025-12-12

2815 Wild Cherry
Schertz, TX  78154

Beds: 4.0
Baths: 2.0
Sq Ft: 2,204
Lot: 7,200 sf
Single Family Map
View Full Details

Current Property Rentals

Karen McMillan currently has no rental properties available in Seguin and surrounding areas. Check back later.