Deborah Olinger Siefkin

Deborah Olinger Siefkin
Real Estate Agent (Broker)
Austin TX

Broker (TX: 0606909)

16 years experience

REALTOR® 3 Active Listings Serves Travis County, TX
View on Realtor.com

Contact Information

Brokerage
Rightsize Realty Assoc Llc
Office Address
4800 Spicewood Springs Rd
Austin, TX  78759
(Travis County)
Office Phone
940-368-1013
Office Fax
Mobile
940-368-1013
Email
debsiefkin@me.com

Service Areas

Flower Mound: TX Bartonville: TX Double Oak: TX Denton: TX Corral City: TX Argyle: TX Lantana: TX Copper Canyon: TX Northlake: TX Highland Village: TX

About Deborah Siefkin

Deb Siefkin brings over a decade of expertise in residential real estate, having collaborated with both national and local brokerages, builders, and currently operating her own firm, RightSize Realty Associates LLC. She focuses on the rapidly developing I-35 West corridor in Denton County, Texas, serving clients from Denton to North Fort Worth. Renowned for her reliability, responsiveness, and ethical approach, Deb is a trusted advisor for clients looking to buy or sell both new and pre-owned homes in Robson Ranch and throughout Denton County.

A resident of Denton County for more than 25 years, Deb has spent 17 years as a pioneer in Robson Ranch, an active adult resort community. Her extensive market knowledge, sharp insights, and specialized skills enable her to assist clients in enhancing their lives by finding homes that better suit their needs and lifestyles.

For buyers, Deb excels in helping clients identify gaps in their current living situations and articulating their desires for a new home and community. She guides them in discovering properties that align with their vision of a more fulfilling lifestyle.

For sellers, Deb offers a wealth of market knowledge and experience, ensuring that properties are accurately priced, effectively marketed, and successfully closed at optimal prices with minimal time on the market.

Deb holds specialized training in serving clients aged 40 and above, including designations as a Senior Real Estate Specialist (SRES), Graduate REALTOR® Institute (GRI), and Master Certified Negotiations Expert (MCNE). She earned her Bachelor’s degree from the University of Delaware and a Master’s degree from the University of North Texas. As a trained lifestyle coach, Deb is passionate about helping clients improve their lives through the process of finding the right-sized home and enhancing their lifestyle.

Married to “Tall Bill” for 47 years, Deb has navigated various life changes alongside him, currently enjoying their third new home in Robson Ranch. They have three adult children and six grandchildren, most of whom reside in the North Texas area. In her free time, Deb enjoys spending time with her grandchildren, traveling, reading, cooking, wine tasting, and attending music and opera events, all while maintaining strong connections with friends and family and continuing her mission to help clients enhance their lives.

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

$919,477
Avg. Listing Price
From Deborah's portfolio
3.6 / 3.0
Avg. Beds/Baths
Typical property size
2,451 sf
Avg. Square Footage
Interior living space
5553
Active Listings
Current inventory

If you need to reach working real estate agents in the Austin metro area, this list was built for you. Mortgage lenders, title companies, PropTech platforms, insurance providers, continuing education companies, and recruiters all buy Travis County real estate agent email list data to connect directly with licensed professionals who are actively closing deals. These are not passive leads — they are credentialed agents verified through the Texas Real Estate Commission, and they are the exact decision-makers your offer needs to reach.

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Why Travis County, Texas Agent Data Matters

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Current Property Listings

As of 6/27/2026, Deborah Siefkin has 3 properties for sale in Austin and surrounding areas.

$495,000

Listed 2026-03-06

1836 Harrier Ln
Argyle, TX  76226

Beds: 5.0
Baths: 3.0
Sq Ft: 2,747
Lot: 6,839 sf
Single Family Map
View Full Details

$789,000

Listed 2025-11-25

8813 Basanite Ave
Denton, TX  76207

Beds: 2.0
Baths: 3.5
Sq Ft: 3,271
Lot: 9,148 sf
Single Family Map
View Full Details

$800,000

Listed 2026-03-20

11901 Southerland Dr
Denton, TX  76207

Beds: 2.0
Baths: 2.5
Sq Ft: 2,890
Lot: 6,316 sf
Single Family Map
View Full Details

Current Property Rentals

Deborah Siefkin currently has no rental properties available in Austin and surrounding areas. Check back later.