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5101 Portmarnock CT
Austin, TX, 78747
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$515,000
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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
$188
Garage
2 spaces
Listed by Keller Williams Realty
Property Details
Features
Appliances
Flooring
Features
Construction
Lot Features
Fencing
Foundation
Patio / Porch
Parking
Verified property facts
5101 Portmarnock CT is listed at $515,000 with 3 bedrooms, 2 full bathrooms, 2,734 square feet, 0.24-acre lot. This places it above the ZIP 78747 single-family closed-sale median price of $367,490 (ZIP 78747 geography · single-family closed sales · median sale price · trailing 12 months as of Sep 4, 2026).
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 listed by Keller Williams Realty. Keenan Group at Compass presents this IDX listing and provides the accompanying market analysis using MLS Grid / Unlock MLS data reviewed as of Apr 25, 2026.
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1 record on file
Every recorded listing, sale, and lease at 5101 Portmarnock CT, whoever represented it.
Prices shown are list prices. Closed sale prices are available to registered clients in accordance with ACTRIS rules.
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% ($103K)
Adjustable assumption - not a lending recommendation.
$515,000
Luxury property intelligence
A sourced read on Onion Creek pricing, timing, and property scale. No automated valuation claim.
List price
$515,000
Price per sqft
$188/sqft
Vs. Neighborhood guide reference price
Not available
Days on market
Not available
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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This page does not assume a mortgage rate or publish a monthly payment for 5101 Portmarnock CT. A property-specific estimate requires a current lender rate, chosen down payment, taxes, insurance, and any verified association dues.
As of Apr 25, 2026, 5101 Portmarnock CT is offered at $515,000. The current MLS snapshot shows 170 active listings in 78747.
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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