3504 Shellcastle Ln, Round Rock, TX 78681 Property Records

Williamson County property record for 3504 Shellcastle Ln, Round Rock, TX 78681

Property Summary

Property Type	Single Family Home
Details	2 ba · 1,903 sqft · built 2007
Lot Size	0.156 acres (6,799 sqft)
Owner	Owner Name on File
Tax Bill	$6,338 (2025)
Deeds & Mortgages	Jul 2020 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`R-16-5693-000G-0013`

Property Details

APN / Parcel Number

Primary APN	`R-16-5693-000G-0013`
Alternative APNs	`R460800` `261005`

Interior

Full Baths	2 Baths
Stories	1 Story
Building Area	1,903 sqft Living Area
1st Floor Area	1,903 sqft
Interior Walls	Wallboard/Drywall
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 2007
Effective Year Built	Effective 2008
Exterior Material	Brick Veneer
Foundation Type	Slab (Mat/Raft)
Roof Type	Hip
Lot Area	6,799 sqft
Garage Area	418 sqft
Parking Spaces	2 Parking Spaces
Porch	Open Porch
Porch Area	175 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Central

Location & Zoning

Account Number	R460800
Street Address	3504 SHELLCASTLE LN
City	ROUND ROCK
State	TX
Zip	78681-1143
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	S8720 - VILLAGE AT MAYFIELD RANCH PH 3, BLOCK G, LOT 13
Legal Subdivision	VILLAGE AT MAYFIELD RANCH
Legal Phase	3
Legal Block	G
Legal Lot Number	13
Jurisdiction	WILLIAMSON TX
Township / Civil Division	ROUND ROCK-GEORGETOWN
Census Block Group	2
Census Block	2009
Census Tract	20608

Owner

Source: Williamson County records · APN R-16-5693-000G-0013

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	ROUND ROCK, TX
Occupancy	Owner Occupied

Deeds, Mortgages & Sale History

Assessor's Deed Record

Last Sale	Apr 02, 2008
Deed Sale	Apr 02, 2008
Prior Sale	Apr 02, 2008
Deed Document Number	0000025213
Last Transfer Date	Dec 01, 2014
Transfer Doc	0000095275
Record Updated	Jun 08, 2026

July 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	WILLIAMSON TX
Property Address	3504 SHELLCASTLE LN, ROUND ROCK, TX 78681-1143
Document Number	0000087244
Instrument Date	Jul 21, 2020
Transaction Type	Mortgage
Record Updated	Aug 11, 2020
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Husband and Wife
Address	3504 SHELLCASTLE LN ROUND ROCK TX 786811143, ROUND ROCK, TX 78681-1143

Mortgage

Document Number	0000087244
Date	Jul 24, 2020
Instrument	87244

Lender

Name	QUICKEN LNS
Type	Funding / Finance Company
Address	DETROIT, MI 48226-1906

Agreement

Amount	Amount Recorded
Term	360 Months
Due	Jul 23, 2050

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	Round Rock 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	$6,338.00 (+11.86%) Homeowner's exemption	$467,450 (+9.57%) Land $120,000 Building $347,450	$467,450 (+9.57%) Land $120,000 Building $347,450
2023	$5,666.00 (-6.38%) Homeowner's exemption	$426,604 Land $136,000 Building $290,604	$426,604 Land $136,000 Building $290,604
2022	$6,052.00

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	1 in force

Wildfire

Wildfire Risk	Low lower than 80% of the US · lower than 94% of Texas
Wildfire Likelihood	0.01% annual chance
Exposure	None beyond ember reach

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)
Spectrum Cable	1,000 / 1,000
Verizon Fixed Wireless	300 / 20
T-Mobile USA Fixed Wireless	100 / 20

May also be available: AT&T, Electronic Corporate Pages, SOS Communications, Valley Telephone Cooperative, Inc. (TX).

Based on FCC filings for 731 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.