5100 Portmarnock Ct
Austin, TX 78747
Onion Creek- Studio
- 3 Baths
- 2,509 sqft (on 0.30 acres)
Studio
3 Baths
2,509 sqft
(on 0.30 acres)
Local Information
-- mins to
Description
This single-family home is located at 5100 Portmarnock Ct, Austin, TX. 5100 Portmarnock Ct is in the Onion Creek neighborhood in Austin, TX and in ZIP code 78747. This property has 3 bathrooms and approximately 2,509 sqft of floor space. This property has a lot size of 0.30 acres and was built in 1996.
5100 Portmarnock Ct, Austin, TX 78747 is a studio, 3 bathroom, 2,509 sqft single-family home in Onion Creek, built in 1996. It is currently off market. The Trulia Estimate is $556,100, with a rent estimate of $2,864/month.
Home Highlights
Parking
Garage
Outdoor
No Info
A/C
Heating & Cooling
HOA
None
Price/Sqft
No Info
Listed
Less than a day ago
Home Details for 5100 Portmarnock Ct
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Heating & Cooling Heating: OtherAir ConditioningCooling System: CentralHeating Fuel: Other |
Levels, Entrance, & Accessibility Stories: 1 |
Fireplace & Spa Fireplace |
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Exterior Home Features Roof: CompositionFoundation Type: Slab |
Parking & Garage GarageParking: Garage Attached |
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Year Built Year Built: 1996 |
Property Type / Style Property Type: Single Family Home |
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Units in Building: 1 |
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Lot Area: 0.30 acres |
Market trends in Austin
Last updated May 2026
Avg. sale price
$555K
$14.2KMoM
Sale-to-List Price
97.8%
0.3%MoM
Price per sq ft
$294
$1MoM
Available listings
5593
254MoM
Property Tax and Assessment
| Year | 2025 |
|---|---|
| Tax | $3,060 |
| Assessment | $592,199 |
Home facts updated by county records
Comparable Sales for 5100 Portmarnock Ct
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.05 | Single-Family Home | - | 10/03/25 | 3 | 3 | 2,626 | |
0.35 | Single-Family Home | - | 01/06/26 | 3 | 2,910 | ||
0.40 | Single-Family Home | - | 09/18/25 | 4 | 3 | 2,658 | |
0.40 | Single-Family Home | - | 07/07/25 | 5 | 3 | 2,612 | |
0.49 | Single-Family Home | - | 09/29/25 | 4 | 3 | 2,171 | |
0.51 | Single-Family Home | - | 06/23/26 | 4 | 4 | 3,195 | |
0.55 | Single-Family Home | - | 10/29/25 | 5 | 4 | 2,302 | |
0.63 | Single-Family Home | - | 10/27/25 | 4 | 2 | 2,380 | |
0.69 | Single-Family Home | - | 08/22/25 | 2 | 2,663 | ||
0.66 | Single-Family Home | - | 08/22/25 | 4 | 4 | 3,655 |
Nearby homes
Get a sense of prices in the area by checking nearby homes.Assigned Schools
These are the assigned schools for 5100 Portmarnock Ct.
What Locals Say about Onion Creek
At least 1 Trulia users voted on each feature.
100 % Say car is needed
100 % Say it's dog friendly
100 % Say people would walk alone at night
100 % Say parking is easy
100 % Say there's holiday spirit
100 % Say yards are well-kept
100 % Say there's wildlife
100 % Say streets are well-lit
75 % Say they plan to stay for at least 5 years
75 % Say it's quiet
67 % Say neighbors are friendly
67 % Say kids play outside
50 % Say there are community events
50 % Say it's walkable to restaurants
33 % Say there are sidewalks
25 % Say it's walkable to grocery stores
Sourced by Trulia users. Learn more about our methodology.
LGBTQ Local Legal Protections
LGBTQ Local Legal Protections