520 S 46th St, Boulder, CO 80305 Property Records

Boulder County property record for 520 S 46th St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,428 sqft · built 1958
Lot Size	0.157 acres (6,822 sqft)
Owner	Company Name on File
Last Sale	$298,500 (Jan 2005)
Tax Bill	$4,684 (2025)
Deeds & Mortgages	Sep 2021 Line of Credit Jan 2019 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`1577-08-1-01-002`

Property Details

APN / Parcel Number

Primary APN	`1577-08-1-01-002`
Alternative APNs	`R0013669` `0013669`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	5 Rooms
Stories	2 Stories
Building Area	1,428 sqft Living Area
Gross Area	1,714 sqft
1st Floor Area	884 sqft
Upper Floors Area	544 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1958
Effective Year Built	Effective 1963
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Roof Material	Asphalt
Lot Area	6,822 sqft (0.157 acres)
Garage Type	Attached
Garage Area	286 sqft
Parking Spaces	1 Parking Space
Patio Area	180 sqft

Utilities, Heating & Cooling

Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0013669
Street Address	520 S 46TH ST
City	BOULDER
State	CO
Zip	80305-6038
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 2 BLK 1 MARTIN ACRES 3
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	MARTIN ACRES 3 - BO
Legal Block	1
Legal Lot Number	2
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	1
Census Block	1001
Census Tract	12508

Owner

520 S 46th St is owned by a company that acquired it in March 2016.

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

Owner of Record	Company Name on File
Mailing Address	300 CENTER DR, G243, SUPERIOR, CO 80027-8625
Owner Type	Company
Vesting	Company

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

Deeds, Mortgages & Sale History

Date	Document
Sep 29, 2021	Deed of Trust, Mortgage · Line of Credit FIRSTBANK
Jan 18, 2019	Deed of Trust, Mortgage · Conventional Mortgage FIRSTBANK

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jan 3, 2005 · Amount on File
Deed Sale	Jan 3, 2005 · Amount on File
Prior Sale	Mar 14, 1988
Deed Document Number	20052654913
Last Transfer Date	Mar 10, 2016
Transfer Doc	0003505590
Record Updated	Oct 29, 2026

September 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	520 S 46TH ST, BOULDER, CO 80305-6038
Transaction Type	Mortgage
Record Updated	Oct 19, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003917153
Date	Sep 29, 2021
Instrument	3917153

Lender

Name	FIRSTBANK
Type	Bank
Address	DENVER, CO 80215

Agreement

Type	Line of Credit
Amount	Amount on Record

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

January 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	520 S 46TH ST, BOULDER, CO 80305-6038
Document Number	0003694786
Instrument Date	Jan 18, 2019
Transaction Type	Mortgage
Record Updated	Jan 30, 2019
Title Company	LAND TITLE GUARANTEE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	520 S 46TH ST BOULDER CO 803056038, BOULDER, CO 80305-6038

Mortgage

Document Number	0003694786
Date	Jan 22, 2019
Instrument	3694786

Lender

Name	FIRSTBANK
Type	Bank
Address	LAKEWOOD, CO 80215

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Jan 21, 2049

Interest

Rate Type	Adjustable Rate
Rate	5.12%

Tax Assessment & Valuation

The 2025 property tax bill for 520 S 46th St was $4,684.

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		$47,770 (-1.06%) Land $26,833 Building $20,937	$772,500 (-) Land $464,600 Building $307,900
2025	$4,684.00	$48,282 Land $29,038 Building $19,244	$772,500 Land $464,600 Building $307,900
2023	$4,516.00 (+11.81%)	$55,121 (+29.13%) Land $34,311 Building $20,810	$822,700 (+33.95%) Land $512,100 Building $310,600
2022	$4,039.00	$42,687 Land $25,541 Building $17,146	$614,200 Land $367,500 Building $246,700

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

FEMA maps place 520 S 46th 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	1 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 520 S 46th St is moderate, ranking above 40% of the US, with a 0.06% annual chance of wildfire.

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

Wildfire Risk	Moderate above 40% of the US · lower than 76% of Colorado
Wildfire Likelihood	0.06% annual chance
Exposure	Indirect 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 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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