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505 S 45th St, Boulder, CO 80305 Property Records

Boulder County property record for 505 S 45th St, Boulder, CO 80305

Property Summary

Property TypeSingle Family Home
Details3 bd · 1.75 ba · 1,553 sqft · built 1958
Lot Size0.161 acres (7,014 sqft)
Owner2 Individual Names on Record
Last Sale$87,000 (May 1987)
Tax Bill$4,358 (2025)
Deeds & MortgagesFeb 2019 Transfer
Jan 2018 Transfer
+ 1 more
Flood ZoneZone X (minimal risk)
APN1577-08-1-03-036

Property Details

APN / Parcel Number

Primary APN1577-08-1-03-036
Alternative APNs
  • R0013767
  • 0013767

Interior

Bedrooms3 Beds
Full Baths1.75 Baths
Half Baths1 Half Bath
Total Rooms7 Rooms
Stories1 Story
Building Area1,553 sqft Living Area
Gross Area2,930 sqft
1st Floor Area1,409 sqft
Basement Area1,222 sqft
Finished Basement144 sqft
Unfinished Basement1,078 sqft
Interior WallsWallboard/Drywall

Exterior

Year BuiltBuilt 1958
Effective Year BuiltEffective 1958
Architectural StyleRanch
Exterior MaterialCombination
Construction TypeMasonry / Concrete Block
Roof MaterialAsphalt
Lot Area7,014 sqft (0.161 acres)
Garage TypeAttached
Garage Area299 sqft
Parking Spaces1 Parking Space
PorchPorch
Porch Area66 sqft

Utilities, Heating & Cooling

Heating SystemForced Air with A/C

Location & Zoning

Account NumberR0013767
Street Address505 S 45TH ST
CityBOULDER
StateCO
Zip80305-6049
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionLOT 36 BLK 3 MARTIN ACRES 3
Legal Range70
Legal Township1S
Legal Section05
Legal SubdivisionMARTIN ACRES 3 - BO
Legal Block3
Legal Lot Number36
JurisdictionBOULDER CO
Township / Civil DivisionBOULDER
Census Block Group3
Census Block3001
Census Tract12508

Owner

Source: Boulder County records, as of September 18, 2026

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

Owner of Record2 Individual Names on Record
Mailing Address505 S 45TH ST, BOULDER, CO 80305-6049
OccupancyOwner Occupied
Owner TypeIndividual
VestingJoint Tenants

Deeds, Mortgages & Sale History

DateDocument
Feb 22, 2019Quit Claim Deed, Transfer
Quitclaim
Jan 26, 2018Intrafamily Transfer, Transfer
FIDELITY NATIONAL TITLE
Mar 6, 2017Quit Claim Deed, Transfer
Quitclaim

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleMay 5, 1987 · Amount on Record
Deed SaleMay 5, 1987 · Amount on Record
Prior SaleOct 28, 1976 · Amount on Record
Deed Document Number1987846585
Last Transfer DateJan 25, 2019
Transfer Doc0003698945
Record UpdatedOct 29, 2026

February 2019: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionBOULDER CO
Recording DateFeb 22, 2019
Property Address505 S 45TH ST, BOULDER, CO 80305-6049
Document Number0003698945
Instrument DateJan 25, 2019
Instrument3698945
Transaction TypeTransfer
Record UpdatedMar 1, 2019

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipJoint Tenants with Right of Survivorship
Address5055 S 45TH ST BOULDER CO 80305, BOULDER, CO 80305

January 2018: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionBOULDER CO
Recording DateJan 26, 2018
Property Address505 S 45TH ST, BOULDER, CO 80305-6049
Document Number0003638040
Map ReferenceMB7 PG8
Instrument DateJan 16, 2018
Instrument3638040
Transaction TypeTransfer
Record UpdatedMar 31, 2022
Title CompanyFIDELITY NATIONAL TITLE

Transaction

Tax$0.00
Amount AccuracyNo Consideration Stated
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name
Address00000

Transferred To (Grantee/Buyer)

NameVerified Name
Address505 S 45TH ST, BOULDER, CO 80305-6049

March 2017: Quit Claim Deed, Transfer

Document TypeQuit Claim Deed
JurisdictionBOULDER CO
Recording DateMar 6, 2017
Property Address505 S 45TH ST, BOULDER, CO 80305-6049
Document Number0003578701
Instrument DateFeb 7, 2017
Instrument3578701
Transaction TypeTransfer
Record UpdatedMar 16, 2017

Transaction

Tax$0.00
Additional
  • Quitclaim
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipJoint Tenants with Right of Survivorship
Address505 S 45TH ST BOULDER CO 803056049, BOULDER, CO 80305-6049

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$44,975 (-1.61%) Land $23,405 Building $21,570$731,400 (-) Land $414,200 Building $317,200
2025$4,358.00 (+2.86%)$45,713 (-13.34%) Land $25,888 Building $19,825$731,400 (-7.1%) Land $414,200 Building $317,200
2023$4,237.00 (+11.71%)$52,749 (+29.14%) Land $30,773 Building $21,976$787,300 (+33.96%) Land $459,300 Building $328,000
2022$3,793.00$40,846 Land $23,005 Building $17,841$587,700 Land $331,000 Building $256,700

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 Policies5 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

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire RiskLow
lower than 67% of the US · lower than 84% of Colorado
Wildfire Likelihood0.04% annual chance
ExposureIndirect
within 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 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 678 locations within half a mile, as of December 31, 2025

ProviderMax Down / Up (Mbps)
Ayva Networks
Fixed Wireless		2,500 / 2,500
CenturyLink
Fiber · DSL in parts of the area		2,000 / 1,000
Xfinity
Cable		2,000 / 250
Verizon
Fixed Wireless		300 / 20
LiveWireNet
Fixed Wireless		250 / 100
T-Mobile
Fixed Wireless		100 / 20

May also be available: AT&T.

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