The 2025 property tax bill for 3521 18th St was $3,428, down 13.9% from the year before.
Source: Collin County assessment roll, as of March 16, 2026
Property Jurisdictions
Type
Name
State
Texas
County
Collin County
Municipality
Plano City
Unified School District
Plano Independent School District (PK - 12)
Tax Bill & Assessment History
Year
Tax Bill
Assessed Value
Assessed Market Value
2025
$3,428.00 (-13.91%)Homeowner's exemption
$318,506Land $78,750Building $239,756
$318,506Land $78,750Building $239,756
2024
$3,982.00
2023
$304,683Land $78,750Building $225,933
$304,683Land $78,750Building $225,933
2022
$4,440.00
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Flood
FEMA maps place 3521 18th St in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 13, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
FEMA Flood Zone
Zone X minimal risk
Nearest Special Flood Hazard Area
Zone AE, within 500 ft
Flood Insurance Requirement
Not required lenders may require it
Community Rating System
Class 7 (15% premium discount)
Nearby Flood Policies
7 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
Wildfire risk around 3521 18th St is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
Wildfire Risk
Low lower than 99.1% of the US · lower than 99.3% of Texas
Wildfire Likelihood
Under 0.01% annual chance
Exposure
None 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 System
CITY OF PLANO serves 292,059 people · EPA ID TX0430007
Water Source
Purchased surface water from NORTH TEXAS MWD WYLIE WTP
Last State Inspection
Jul 2025
Lead
2 ppb (2026) 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, 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 495 locations within half a mile, as of December 31, 2025
Provider
Max Down / Up (Mbps)
Frontier Fiber
7,000 / 7,000
Spectrum Cable
1,000 / 1,000
May also be available: Hotwire Communications, Verizon.