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

Boulder County property record for 435 S 45th St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 2,420 sqft · built 1957
Lot Size	0.159 acres (6,934 sqft)
Owner	Individual Name on Record
Last Sale	$538,000 (Sep 2013)
Tax Bill	$5,646 (2025)
Deeds & Mortgages	Jan 2022 Mortgage Apr 2020 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`1577-05-4-27-014`

Property Details

APN / Parcel Number

Primary APN	`1577-05-4-27-014`
Alternative APNs	`R0014002` `0014002`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	2,420 sqft Living Area
Gross Area	3,134 sqft
1st Floor Area	1,530 sqft
Upper Floors Area	720 sqft
Basement Area	884 sqft
Finished Basement	170 sqft
Unfinished Basement	714 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1957
Effective Year Built	Effective 1975
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	6,934 sqft (0.159 acres)

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0014002
Street Address	435 S 45TH ST
City	BOULDER
State	CO
Zip	80305-6047
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 14 BLK 10 MARTIN ACRES 2
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	MARTIN ACRES 2 - BO
Legal Block	10
Legal Lot Number	14
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3011
Census Tract	12507

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 Record	Individual Name on Record
Mailing Address	435 S 45TH ST, BOULDER, CO 80305-6047
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Jan 27, 2022	Deed of Trust, Mortgage · Conventional Mortgage ROCKET MORTGAGE LLC
Apr 23, 2020	Deed of Trust, Mortgage · Conventional Mortgage CHERRY CREEK MORTGAGE CO INC
Aug 10, 2020	Deed of Trust, Mortgage · Conventional Mortgage QUICKEN LOANS LLC

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Sep 16, 2013 · Amount on Record
Deed Sale	Sep 16, 2013 · Amount on Record
Prior Sale	Jan 27, 1999 · Amount on Record
Deed Document Number	20133341601
Prior Transfer Date	Aug 8, 2013
Prior Transfer Doc	0003341600
Record Updated	Oct 29, 2026

January 2022: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	435 S 45TH ST, BOULDER, CO 80305-6047
Transaction Type	Mortgage
Record Updated	Feb 11, 2022
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003942458
Date	Jan 27, 2022
Instrument	3942458

Lender

Name	ROCKET MORTGAGE LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Feb 1, 2052

April 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	435 S 45TH ST, BOULDER, CO 80305-6047
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	HERITAGE TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003779125
Date	Apr 23, 2020
Instrument	3779125

Lender

Name	CHERRY CREEK MORTGAGE CO INC
Type	Mortgage Company
Address	ENGLEWOOD, CO 80111

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	May 1, 2050

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	435 S 45TH ST, BOULDER, CO 80305-6047
Transaction Type	Mortgage
Record Updated	Feb 5, 2021
Title Company	AMROCK INC

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003805255
Date	Aug 10, 2020
Instrument	3805255

Lender

Name	QUICKEN LOANS LLC
Type	Mortgage Company
Address	DETROIT, MI 48226

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Aug 1, 2050

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	Colorado
County	Boulder County
Municipality	Boulder City
Unified School District	Boulder Valley School District RE-2 (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$59,670 (+0.76%) Land $32,599 Building $27,071	$947,500 (-) Land $549,400 Building $398,100
2025	$5,646.00 (+1.66%)	$59,219 (-12.92%) Land $34,338 Building $24,881	$947,500 (-6.65%) Land $549,400 Building $398,100
2023	$5,554.00 (+11.66%)	$68,006 (+26.95%) Land $40,234 Building $27,772	$1,015,000 (+31.68%) Land $600,500 Building $414,500
2022	$4,974.00	$53,570 Land $29,843 Building $23,727	$770,800 Land $429,400 Building $341,400

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 Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Community Rating System	Class 5 (25% premium discount)
Nearby Flood Policies	6 in force
Nearby Flood Claims	7 (1979–2022)
Claims Outside the SFHA	5 of 7
Most Recent Claim	Jul 2022 · rainfall accumulation
Claims by Event	Severe Storms, Flooding, Landslides, And Mudslides, Sep 2013 · 5 claims

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 Risk	Low lower than 80% of the US · lower than 91% of Colorado
Wildfire Likelihood	0.03% 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 BOULDER serves 166,080 people · EPA ID CO0107152
Water Source	Surface water
Last State Inspection	Sep 2024
Lead	2 ppb (2023–2025) action level 15 ppb

Violations Reported to EPA

Water Quality	Haloacetic acids resolved · Jul 2017
Treatment and Procedure	None last 10 years
Monitoring and Reporting	1 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

Provider	Max 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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