545 S 42nd St, Boulder, CO 80305 Property Records

Boulder County property record for 545 S 42nd St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 2,214 sqft · built 1958
Lot Size	0.165 acres (7,185 sqft)
Owner	Individual Name on File
Last Sale	$508,000 (Jul 2008)
Tax Bill	$6,101 (2025)
Deeds & Mortgages	Dec 2023 Sale May 2020 Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`1577-08-1-06-032`

Property Details

APN / Parcel Number

Primary APN	`1577-08-1-06-032`
Alternative APNs	`R0011116` `0011116`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	2 Half Baths
Total Rooms	10 Rooms
Stories	1 Story
Building Area	2,214 sqft Living Area
Gross Area	2,478 sqft
1st Floor Area	1,107 sqft
Basement Area	1,107 sqft
Finished Basement	1,107 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1958
Effective Year Built	Effective 2000
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	7,185 sqft (0.165 acres)
Garage Type	Attached
Garage Area	264 sqft
Parking Spaces	1 Parking Space

Exterior Amenities

Porch	Porch
Porch Area	50 sqft
Deck Area	84 sqft
Patio Area	244 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0011116
Street Address	545 S 42ND ST
City	BOULDER
State	CO
Zip	80305-5906
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 32 BLK 6 MARTIN ACRES 3
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	MARTIN ACRES 3 - BO
Legal Block	6
Legal Lot Number	32
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3004
Census Tract	12508

Owner

545 S 42nd St is owned and occupied by an individual who acquired it in November 2023.

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

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Individual Name on File
Mailing Address	545 S 42ND ST, BOULDER, CO 80305-5906
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Dec 4, 2023	Warranty Deed, Transfer
May 27, 2020	Deed of Trust, Mortgage · Conventional Mortgage PLANET HM LNDG
Sep 20, 2019	Deed of Trust, Mortgage · Conventional Mortgage PLANET HM LNDG
Aug 4, 2017	Deed of Trust, Mortgage · Line of Credit ELEVATIONS CU

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jul 28, 2008 · Amount on File
Deed Sale	Jul 28, 2008 · Amount on File
Prior Sale	Dec 4, 2006 · Amount on File
Deed Document Number	20082945758
Last Transfer Date	Nov 9, 2023
Transfer Doc	0004030096
Record Updated	Oct 29, 2026

December 2023: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Dec 4, 2023
Property Address	545 S 42ND ST, BOULDER, CO 80305-5906
Document Number	0004030096
Instrument Date	Nov 9, 2023
Instrument	4030096
Transaction Type	Transfer
Record Updated	Jan 4, 2024

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	545 S 42ND ST, BOULDER, CO 80305-5906

May 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	545 S 42ND ST, BOULDER, CO 80305-5906
Document Number	0003788115
Instrument Date	May 27, 2020
Transaction Type	Mortgage
Record Updated	Jul 10, 2020
Title Company	HERITAGE TITLE COMPANY, HERITAGE TITLE CO.

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	545 S 42ND ST BOULDER CO 803055906, BOULDER, CO 80305-5906

Mortgage

Document Number	0003788115
Date	Jun 2, 2020
Instrument	3788115

Lender

Name	PLANET HM LNDG
Address	MERIDEN, CT 06450

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jun 1, 2050

September 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	545 S 42ND ST, BOULDER, CO 80305-5906
Document Number	0003739056
Instrument Date	Sep 20, 2019
Transaction Type	Mortgage
Record Updated	Oct 15, 2019
Title Company	OTHER

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	545 S 42ND ST BOULDER CO 803055906, BOULDER, CO 80305-5906

Mortgage

Document Number	0003739056
Date	Sep 27, 2019
Instrument	3739056

Lender

Name	PLANET HM LNDG
Address	MERIDEN, CT 06450

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Sep 26, 2049

August 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	545 S 42ND ST, BOULDER, CO 80305-5906
Document Number	0003607973
Instrument Date	Aug 4, 2017
Transaction Type	Mortgage
Record Updated	Aug 15, 2017

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	545 S 42ND ST BOULDER CO 803055906, BOULDER, CO 80305-5906

Mortgage

Document Number	0003607973
Date	Aug 9, 2017
Instrument	3607973

Lender

Name	ELEVATIONS CU
Address	BOULDER, CO 80301

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	240 Months
Due	Aug 8, 2037

Interest

Rate Type	Adjustable Rate

Tax Assessment & Valuation

The 2025 property tax bill for 545 S 42nd St was $6,101.

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		$64,858 (+1.36%) Land $27,662 Building $37,196	$1,023,800 (-) Land $476,800 Building $547,000
2025	$6,101.00	$63,988 Land $29,800 Building $34,188	$1,023,800 Land $476,800 Building $547,000
2023	$6,002.00 (+16.95%)	$73,191 (+32.43%) Land $35,215 Building $37,976	$1,092,400 (+37.37%) Land $525,600 Building $566,800
2022	$5,132.00	$55,266 Land $26,215 Building $29,051	$795,200 Land $377,200 Building $418,000

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

FEMA maps place 545 S 42nd St in Zone X, an area of minimal flood risk.

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	5 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 545 S 42nd St is low, with 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 80% of the US · lower than 91% of Colorado
Wildfire Likelihood	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 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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