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4742 18th St, Boulder, CO 80304 Property Records

Boulder County property record for 4742 18th St, Boulder, CO 80304

Property Summary

Property TypeSingle Family Home
Details1 bd · 1 ba · 888 sqft · built 2004
Lot Size0.036 acres (1,549 sqft)
OwnerIndividual Name on Record
Last Sale$519,000 (Sep 2020)
Tax Bill$3,668 (2025)
Deeds & MortgagesSep 2020 Sale
Flood ZoneZone X (minimal risk)
APN1463-07-0-40-040

Property Details

APN / Parcel Number

Primary APN1463-07-0-40-040
Alternative APNs
  • R0504960
  • 0504960

Interior

Bedrooms1 Bed
Full Baths1 Bath
Total Rooms5 Rooms
Building Area888 sqft Living Area
Gross Area1,108 sqft
1st Floor Area660 sqft
Upper Floors Area228 sqft
Interior WallsWallboard/Drywall

Exterior

Year BuiltBuilt 2004
Effective Year BuiltEffective 2004
Architectural StyleTownhouse
Exterior MaterialCombination
Construction TypeFrame
Roof MaterialAsphalt
Lot Area1,549 sqft (0.036 acres)
Garage TypeAttached
Garage Area220 sqft
Parking Spaces1 Parking Space
PorchPorch
Porch Area36 sqft
Deck Area102 sqft

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemForced Air with A/C

Location & Zoning

Account NumberR0504960
Street Address4742 18TH ST
CityBOULDER
StateCO
Zip80304-2261
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionLOT 40 BLK 18 HOLIDAY NEIGHBORHOOD
Legal Range70
Legal Township1N
Legal Section07
Legal SubdivisionHOLIDAY NEIGHBORHOOD
Legal Block18
Legal Lot Number40
JurisdictionBOULDER CO
Township / Civil DivisionBOULDER
Census Block Group1
Census Block1003
Census Tract12105

Owner

Source: Boulder County records, as of September 29, 2026

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

Owner of RecordIndividual Name on Record
Mailing Address1835 YAUPON AVE, BOULDER, CO 80304-4441
Owner TypeIndividual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed NamesName on Deed
Last SaleSep 25, 2020 · Amount on Record
Deed SaleSep 25, 2020 · Amount on Record
Prior SaleAug 1, 2012 · Amount on Record
Deed Document Number20203818553
Prior Transfer DateFeb 13, 2008
Prior Transfer Doc0002910514
Record UpdatedOct 29, 2026

September 2020: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionBOULDER CO
Recording DateSep 25, 2020
Property Address4742 18TH ST, BOULDER, CO 80304-2261
Document Number0003818553
Instrument DateSep 24, 2020
Instrument3818553
Transaction TypeTransfer
Record UpdatedOct 15, 2020
Title CompanyFIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE INSURA

Transaction

AmountAmount Recorded
Tax$52.00
Amount AccuracyConfirmed
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address4742 18TH ST BOULDER CO 803042261, BOULDER, CO 80304-2261

Tax Assessment & Valuation

Source: Boulder County assessment roll, as of September 18, 2026

Property Jurisdictions

TypeName
StateColorado
CountyBoulder County
MunicipalityBoulder City
Unified School DistrictBoulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2026$37,669 (-2.08%) Land $15,895 Building $21,774$615,500 (-) Land $295,300 Building $320,200
2025$3,668.00 (+5.13%)$38,469 (-12.75%) Land $18,456 Building $20,013$615,500 (-6.47%) Land $295,300 Building $320,200
2023$3,489.00 (+6.5%)$44,093 (+24.96%) Land $19,189 Building $24,904$658,100 (+29.62%) Land $286,400 Building $371,700
2022$3,276.00$35,285 Land $15,547 Building $19,738$507,700 Land $223,700 Building $284,000

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer, effective October 14, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Community Rating SystemClass 5 (25% premium discount)
Nearby Flood Policies6 in force
Nearby Flood Claims1 (1982)
Claims Outside the SFHA1 of 1
Most Recent ClaimJul 1982 · tidal / storm surge

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 RiskHigh
above 76% of the US · above 76% of Colorado
Wildfire Likelihood0.5% annual chance
ExposureIndirect
within ember reach
Adjoins Burnable LandYes

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 BOULDER
serves 166,080 people · EPA ID CO0107152
Water SourceSurface water
Last State InspectionSep 2024
Lead2 ppb (2023–2025)
action level 15 ppb

Violations Reported to EPA

Water QualityHaloacetic acids
resolved · Jul 2017
Treatment and ProcedureNone
last 10 years
Monitoring and Reporting1
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 748 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Ayva Networks
Fixed Wireless		2,500 / 2,500
Xfinity
Cable		2,000 / 250
Verizon
Fixed Wireless		300 / 20
LiveWireNet
Fixed Wireless		250 / 100
CenturyLink
DSL · Fiber in parts of the area		140 / 20
AT&T
Fixed Wireless		100 / 20

May also be available: T-Mobile.

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