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5101 Portmarnock CT
Austin, TX, 78747
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$560,000
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This spacious 3 bedroom, 2 bathroom home in South Austin is a must see. It offers plenty of space with two living spaces & two dining areas. Conveniently located to downtown Austin in Onion Creek subdivision within a golf course community, on a quiet cul de sac. Large windows overlook the front and backyard, with an enclosed screen patio. Home has been recently upgraded with hardwood floors, crown molding, granite countertops and stainless-steel appliances. Charming home that has been well maintained from the inside out.
Property Type
Residential
Year Built
1998
Lot Size
0.24 acres
$/Sq Ft
$205
HOA
$144/mo
Garage
2 spaces
Listed by Keller Williams Realty
Property Details
Features
Appliances
Flooring
Features
Construction
Lot Features
Fencing
Foundation
Patio / Porch
Parking
Waterfront
Verified property facts
5101 Portmarnock CT is listed at $560,000 with 3 bedrooms, 2 full bathrooms, 2,734 square feet, 0.24-acre lot. This places it above the 78747 median of $372,384.
5101 Portmarnock CT is zoned for Austin ISD with assigned schools: Blazier (8/10) (elementary), Paredes (2/10) (middle), Akins (6/10) (high). School assignments should be verified directly with the district.
5101 Portmarnock CT is a Residential built in 1998 featuring 3 bedrooms, 2 full bathrooms, 2,734 square feet, 0.24-acre lot.
5101 Portmarnock CT is presented by the Keenan Group at Compass Real Estate, the #1 Austin Board of Realtors Team (2024) with 1,000+ career transactions and $1B+ in career volume across Austin's luxury market.
With 20% down ($112,000) on a 30-year fixed mortgage at approximately 6.75%, the estimated monthly payment for 5101 Portmarnock CT is around $3,932 including principal, interest, and estimated taxes. Actual payment varies by rate, down payment, insurance, and HOA fees.
#1 Austin Board of Realtors Team. Over 1,000 successful transactions with high-end expertise.
25+ years advising buyers and sellers in this community
Listing timeline with current price, original ask, and market time.
Public record data from county appraisal records. Market value can differ from assessed value.
| Year | Taxes | Total Assessment | Land | Additions |
|---|---|---|---|---|
2025-6.1% | — | $582,513 | — | — |
2024-10.8% | — | $620,621 | $66,000 | $449,445 |
2023+58.1% | — | $695,865 | $66,000 | $554,621 |
2022 | — | $440,087 | $66,000 | $629,865 |
Zoned assignments come from the property school fields available to us. District context schools are shown only when an assigned tier is missing. Contact the school district directly to verify current boundaries and enrollment eligibility. Ratings from GreatSchools.org.
20% ($112K)
$560,000
Luxury property intelligence
A sourced read on Onion Creek pricing, timing, and property scale. No automated valuation claim.
List price
$560,000
Price per sqft
$205/sqft
Vs. Onion Creek median
Not available
Days on market
1,928 days
Original to current
No verified reduction
$515K original
Active inventory context
Ask for current inventory
Source: MLS Grid / Unlock MLS and Keenan Group review as of Apr 25, 2026.
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#1 ABOR Team 2024 with $1B+ career sales volume
At $560,000, 5101 Portmarnock CT is in the Onion Creek market where there are currently 166 active listings in 78747.
5101 Portmarnock CT includes verified waterfront access: None. Buyers should confirm shoreline, dock rights, and floodplain status during due diligence.
5101 Portmarnock CT is part of a managed community with HOA dues of $144 semi-annually. HOA-managed communities in Austin's luxury market typically provide amenities such as common areas, security, and exterior maintenance. Verify current dues and rules with the HOA directly.
Answers use visible listing facts, school context, and neighborhood data available on this page. Verify time-sensitive details before making decisions.
7 events on record
Current Price
$515,000
Timeline data compiled from MLS records and public records. Information deemed reliable but not guaranteed.
| Year | Taxes | Total Assessment | Land | Additions |
|---|---|---|---|---|
2025-6.1% | — | $582,513 | — | — |
2024-10.8% | — | $620,621 | $66,000 | $449,445 |
2023+58.1% | — | $695,865 | $66,000 | $554,621 |
2022 | — | $440,087 | $66,000 | $629,865 |
Timeline merges MLS activity (when permitted) with public records. Some details may be restricted to registered VOW clients.
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