1. Home
  2. Texas
  3. Travis County
  4. Austin
  5. Sidereal Dr

4503 Sidereal Dr, Austin, TX 78727 Property Records

Travis County property record for 4503 Sidereal Dr, Austin, TX 78727

Property Summary

Property TypeSingle Family Home
Details2.25 ba · 1,679 sqft · built 1984
Lot Size0.172 acres (7,481 sqft)
Owner2 Individual Names on Record
Last Sale$492,100 (Sep 2024)
Tax Bill$9,779 (2025)
Deeds & MortgagesMar 2024 Mortgage
Flood ZoneZone X (minimal risk)
APN0266080821

Property Details

APN / Parcel Number

Primary APN0266080821
Alternative APNs
  • 02660808210000
  • 270426

Interior

Full Baths2.25 Baths
Half Baths1 Half Bath
Stories1 Story
Building Area1,679 sqft Living Area
Gross Area2,128 sqft
1st Floor Area1,679 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1984
Effective Year BuiltEffective 1984
Construction TypeWood
Roof TypeHip
Roof MaterialComposition Shingle
Lot Area7,481 sqft (0.172 acres)
Lot Dimensions125 ft deep x 60 ft wide
Garage TypeAttached
Garage Area449 sqft
DrivewayDriveway
Parking Spaces2 Parking Spaces
PorchOpen Porch
Porch Area83 sqft
Patio Area145 sqft

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemCentral

Location & Zoning

Account Number270426
Street Address4503 SIDEREAL DR
CityAUSTIN
StateTX
Zip78727-5123
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionLOT 21 BLK V MILWOOD SEC 10
Legal SubdivisionMILWOOD SEC 10
Legal BlockV
Legal Lot Number21
JurisdictionTRAVIS TX
Township / Civil DivisionAUSTIN
Census Block Group1
Census Block1003
Census Tract41300

Owner

Source: Travis County records, as of August 10, 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record2 Individual Names on Record
Mailing Address4503 SIDEREAL DR, AUSTIN, TX 78727-5123
OccupancyOwner Occupied
Owner TypeIndividual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleSep 3, 2024 · Amount on Record
Deed SaleSep 3, 2024 · Amount on Record
Prior SaleMar 7, 2024 · Amount on Record
Deed Document Number202497555
Prior Transfer DateJul 26, 2006
Prior Transfer Doc0000146116
Record UpdatedSep 20, 2026

March 2024: Vendor's Lien, Transfer

Document TypeVendor's Lien
JurisdictionTRAVIS TX
Recording DateMar 7, 2024
Property Address4503 SIDEREAL DR, AUSTIN, TX 78727-5123
Document Number0000024623
Map ReferenceVOL 81 PG 235
Instrument DateMar 6, 2024
Instrument2024024623
Transaction TypeTransfer
Record UpdatedMar 29, 2024

Transaction

Tax$0.00
Additional
  • Notice of Trustee Sale
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address2323 BERWICK DR, ROUND ROCK, TX 78681-2618

Mortgage

Document Number0000024624
DateMar 7, 2024
Instrument2024024624
Lender
NameROB D HOLCOMB ETAL
TypePrivate Party
Special NotesSeller Financed
Agreement
TypeStand-Alone First Mortgage
AmountAmount Recorded

Tax Assessment & Valuation

Source: Travis County assessment roll, as of March 16, 2026

Property Jurisdictions

TypeName
StateTexas
MunicipalityAustin City
CountyTravis County
Unified School DistrictAustin Independent School District (PK - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2025$9,779.00 Homeowner's exemption$601,260 (+6.19%) Land $261,566 Building $339,694$601,260 (+6.19%) Land $261,566 Building $339,694
2023$566,227 Land $150,000 Building $416,227$566,227 Land $150,000 Building $416,227
2022$3,078.00

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective May 17, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
minimal risk
Nearest Special Flood Hazard AreaZone AE, within 500 ft
Flood Insurance RequirementNot required
lenders may require it
Community Rating SystemClass 5 (25% premium discount)
Nearby Flood Policies9 in force

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire RiskLow
lower than 94% of the US · lower than 97.4% of Texas
Wildfire Likelihood0.01% annual chance
ExposureDirect
burnable vegetation

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water SystemCITY OF AUSTIN WATER & WASTEWATER
serves 1,115,323 people · EPA ID TX2270001
Water SourceSurface water
Last State InspectionJul 2023
LeadUnder 1 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityTurbidity
resolved · Feb 2022
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 504 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Google Fiber
Fiber		8,000 / 8,000
Spectrum
Cable		1,000 / 1,000
Verizon
Fixed Wireless		300 / 20
T-Mobile
Fixed Wireless		100 / 20
AT&T
Fixed Wireless · DSL · Fiber in parts of the area		100 / 20

May also be available: Astound Broadband, Western Broadband.

Nearby Properties on Sidereal Dr

Nearby Streets

Search Property Records by Address or Parcel Number

Search by:

By searching, you agree to: Terms • Privacy • Disclosures