3944 Sapphire Loop, Round Rock, TX 78681 Property Records

Williamson County property record for 3944 Sapphire Loop, Round Rock, TX 78681

Property Summary

Property Type	Single Family Home
Details	3 ba · 2,815 sqft · built 2006
Owner	Owner Name on File
Tax Bill	$10,612 (2025)
Deeds & Mortgages	May 2021 Line of Credit
Flood Zone	Zone X (minimal risk)
APN	`R475458`

Property Details

APN / Parcel Number

Primary APN	`R475458`
Alternative APNs	`R-17-W334-609A-0033-0005` `277262`

Interior

Full Baths	3 Baths
Stories	2 Stories
Building Area	2,815 sqft Living Area
1st Floor Area	1,645 sqft
2nd Floor Area	1,170 sqft
Flooring	Carpet
Interior Walls	Wallboard/Drywall
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 2006
Effective Year Built	Effective 2007
Exterior Material	Marblecrete
Foundation Type	Slab (Mat/Raft)
Garage Area	480 sqft
Parking Spaces	2 Parking Spaces

Exterior Amenities

Pool Area	495 sqft
Porch	Open Porch
Porch Area	125 sqft
Patio Area	504 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Account Number	R475458
Street Address	3944 SAPPHIRE LOOP
City	ROUND ROCK
State	TX
Zip	78681-2429
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	S9099 - MAYFIELD RANCH SEC 9, BLOCK A, LOT 33
Legal Subdivision	MAYFIELD RANCH
Legal Block	A
Legal Lot Number	33
Jurisdiction	WILLIAMSON TX
Township / Civil Division	ROUND ROCK-GEORGETOWN
Census Block Group	1
Census Block	1013
Census Tract	20609

Owner

Source: Williamson County records · APN R475458

Assessment roll updated August 1, 2025 · Last verified October 2025

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

Owner of Record	Owner Name on File
Mailing Address	3944 SAPPHIRE LOOP, ROUND ROCK, TX 78681-2429
Occupancy	Owner Occupied

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	May 08, 2007
Deed Sale	May 08, 2007
Prior Sale	May 08, 2007
Deed Document Number	0000038258
Last Transfer Date	Dec 14, 2012
Transfer Doc	0000103650
Record Updated	Jun 08, 2026

May 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	WILLIAMSON TX
Property Address	3944 SAPPHIRE LOOP, ROUND ROCK, TX 78681-2429
Transaction Type	Mortgage
Record Updated	Jun 02, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000075077
Date	May 20, 2021
Instrument	2021075077

Lender

Name	UNIVERSITY FCU
Type	Credit Union
Address	AUSTIN, TX 78759

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	119 Months
Due	Apr 01, 2031

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

Tax Assessment & Valuation

Source: Williamson County records · Assessment roll updated August 1, 2025 · Last verified October 2025

Property Jurisdictions

Type	Name
State	Texas
County	Williamson County
Municipality	Round Rock City
Unified School District	Leander Independent School District (PK - 12)

Tax Bill & Assessment History

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

Year	Tax Bill	Assessed Value	Assessed Market Value
2025	$10,612.00 (+12.71%) Homeowner's exemption	$660,575 (-0.36%) Land $128,000 Building $532,575	$660,575 (-0.36%) Land $128,000 Building $532,575
2023	$9,415.00 (-4.65%) Homeowner's exemption	$662,971 Land $132,000 Building $530,971	$662,971 Land $132,000 Building $530,971
2022	$9,874.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 5, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	3 in force

Wildfire

Wildfire Risk	Low lower than 80% of the US · lower than 94% of Texas
Wildfire Likelihood	0.02% annual chance
Exposure	Direct burnable vegetation at the parcel

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

Provider	Max Down / Up (Mbps)
AT&T Fiber	5,000 / 5,000
Spectrum Fiber · Cable in parts of the area	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
Electronic Corporate Pages Fixed Wireless	200 / 40
T-Mobile USA Fixed Wireless	100 / 20

Based on FCC filings for 537 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CITY OF ROUND ROCK serves 130,662 people
Water Source	Surface water
Last State Inspection	Sep 2023
Lead	5 ppb (2021–2023) action level 15 ppb

Violations Reported to EPA

Water Quality	None last 10 years
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system as reported to EPA, 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. The full violation and enforcement history is in the system's EPA record.