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521 S Interstate 35, Round Rock, TX 78664 Property Records

Williamson County property record for 521 S Interstate 35, Round Rock, TX 78664

Property Summary

Property TypeCommercial
Details52,466 sqft · built 2001
Lot Size2.13 acres (93,088 sqft)
OwnerCompany Name on Record
Tax Bill$116,233 (2025)
Deeds & MortgagesApr 2019 Sale
Flood ZoneZone X (moderate risk)
APNR-16-3495-0000-0002

Property Details

APN / Parcel Number

Primary APNR-16-3495-0000-0002
Alternative APNs
  • R416369
  • 228355

Interior

Stories3 Stories
Building Area52,466 sqft Gross Area
1st Floor Area17,654 sqft
ElevatorElevator

Exterior

Year BuiltBuilt 2001
Effective Year BuiltEffective 2005
Exterior MaterialStucco
Roof TypeGable
Lot Area93,088 sqft

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemCentral

Location & Zoning

Account NumberR16349500000002
Street Address521 S INTERSTATE 35
CityROUND ROCK
StateTX
Zip78664-6602
Property CategoryCommercial
Property TypeCommercial > Retail
Legal DescriptionS7642 - CITY CENTRE BUSINESS PARK SEC 2, LOT 2, ACRES 2.137
Legal SubdivisionCITY CENTRE BUSINESS PARK SEC 2
Legal Block1
Legal Lot Number2
JurisdictionWILLIAMSON TX
Township / Civil DivisionROUND ROCK-GEORGETOWN
Census Block Group1
Census Block1048
Census Tract20701

Owner

Source: Williamson County records, as of September 11, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of RecordCompany Name on Record
Mailing Address111 N CENTRAL EXPY, A, RICHARDSON, TX 75080-5201
Owner TypeCompany

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed NamesName on Deed
Last SaleApr 22, 2019
Deed SaleApr 22, 2019
Deed Document Number201933401
Prior Transfer DateApr 16, 2019
Prior Transfer Doc0000033401
Record UpdatedOct 29, 2026

April 2019: Vendor's Lien, Transfer

Document TypeVendor's Lien
JurisdictionWILLIAMSON TX
Recording DateApr 22, 2019
Property Address521 N INTERSTATE 35, ROUND ROCK, TX 78664
Document Number0000033401
Map ReferenceCAB T SL 391
Instrument DateApr 16, 2019
Instrument2019033401
Transaction TypeTransfer
Record UpdatedDec 6, 2021
Title CompanyFIDELITY NATIONAL TITLE

Transaction

Tax$0.00
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name
Address00000

Transferred To (Grantee/Buyer)

NameVerified Name
Address1150 EMPIRE CENTRAL PL STE 112, 112, DALLAS, TX 75247-4312

Tax Assessment & Valuation

Source: Williamson County assessment roll, as of September 11, 2026

Property Jurisdictions

TypeName
StateTexas
CountyWilliamson County
MunicipalityRound Rock City
Unified School DistrictRound Rock Independent School District (PK - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2025$116,233.00 (-6.33%)$5,900,000 (-3.42%) Land $938,324 Building $4,961,676$5,900,000 (-3.42%) Land $938,324 Building $4,961,676
2024$124,088.00 (+15.81%)
2023$107,151.00 (+41.3%)$6,108,840 Land $938,324 Building $5,170,516$6,108,840 Land $938,324 Building $5,170,516
2022$75,831.00

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 October 5, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
moderate risk
500-Year FloodplainYes
0.2% annual chance
Nearest Special Flood Hazard AreaZone AE, within 500 ft
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies2 in force
Nearby Flood Claims8 (1984–1991)
Most Recent ClaimJan 1991 · river or lake flooding

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 99.1% of the US · lower than 99.3% of Texas
Wildfire LikelihoodUnder 0.01% annual chance
ExposureNone
beyond ember reach

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 ROUND ROCK
serves 130,662 people · EPA ID TX2460003
Water SourceSurface water
Last State InspectionSep 2023
Lead5 ppb (2021–2023)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
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 66 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
AT&T
Fiber · DSL · Fixed Wireless in parts of the area		5,000 / 5,000
Spectrum
Cable · Fiber in parts of the area		1,000 / 50
Verizon
Fixed Wireless		300 / 20
T-Mobile
Fixed Wireless		100 / 20

May also be available: Astound Broadband, Google Fiber, SOS Communications.

Nearby Properties on S Interstate 35

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