415 S 43rd St, Boulder, CO 80305 Property Records

Boulder County property record for 415 S 43rd St, Boulder, CO 80305

Property Summary

Property Type	Single Family Home
Details	3 bd · 1.75 ba · 2,500 sqft · built 1957
Lot Size	0.169 acres (7,348 sqft)
Owner	Individual Name on Record
Last Sale	$610,000 (Jun 2018)
Tax Bill	$4,800 (2025)
Deeds & Mortgages	Nov 2021 Sale Jun 2018 Sale & Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`1577-05-4-25-021`

Property Details

APN / Parcel Number

Primary APN	`1577-05-4-25-021`
Alternative APNs	`R0010342` `0010342`

Interior

Bedrooms	3 Beds
Full Baths	1.75 Baths
Half Baths	1 Half Bath
Total Rooms	5 Rooms
Stories	1 Story
Building Area	2,500 sqft Living Area
Gross Area	2,700 sqft
1st Floor Area	1,150 sqft
Basement Area	1,350 sqft
Finished Basement	1,350 sqft
Interior Walls	Wallboard/Drywall

Exterior

Year Built	Built 1957
Effective Year Built	Effective 1957
Architectural Style	Ranch
Exterior Material	Brick Veneer
Construction Type	Masonry / Concrete Block
Lot Area	7,348 sqft (0.169 acres)
Garage Type	Attached
Garage Area	200 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Account Number	R0010342
Street Address	415 S 43RD ST
City	BOULDER
State	CO
Zip	80305-6007
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	LOT 21 BLK 8 MARTIN ACRES 2
Legal Range	70
Legal Township	1S
Legal Section	05
Legal Subdivision	MARTIN ACRES 2 - BO
Legal Block	8
Legal Lot Number	21
Jurisdiction	BOULDER CO
Township / Civil Division	BOULDER
Census Block Group	3
Census Block	3009
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	415 S 43RD ST, BOULDER, CO 80305-6007
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Nov 18, 2021	Special Warranty Deed, Transfer
Jun 12, 2018	Warranty Deed, Transfer · Conventional Mortgage CITIBANK NA
Mar 13, 2018	Grant Deed, Transfer
Mar 13, 2018	Quit Claim Deed, Transfer Quitclaim

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jun 12, 2018 · Amount on Record
Deed Sale	Jun 12, 2018 · Amount on Record
Prior Sale	Feb 6, 1980
Deed Document Number	20183660385
Prior Transfer Date	Mar 7, 2018
Prior Transfer Doc	0003644893
Record Updated	Oct 29, 2026

November 2021: Special Warranty Deed, Transfer

Document Type	Special Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Nov 18, 2021
Property Address	415 S 43RD ST, BOULDER, CO 80305-6007
Document Number	0003929268
Instrument Date	Nov 8, 2021
Instrument	3929268
Transaction Type	Transfer
Record Updated	Dec 3, 2021

Transaction

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

Transferred From (Grantor/Seller)

Name	Verified Name
Address	211 SHADOWBEND DR, 211, WHEELING, IL 60090-3153

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	415 S 43RD ST, BOULDER, CO 80305-6007

June 2018: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jun 12, 2018
Property Address	415 S 43RD ST, BOULDER, CO 80305-6007
Document Number	0003660385
Instrument Date	Jun 1, 2018
Instrument	3660385
Transaction Type	Transfer
Record Updated	Mar 31, 2022
Title Company	LAND TITLE GUARANTEE CO

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$61.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name
Address	00000

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	211 SHADOWBEND DR, WHEELING, IL 60090-3153

Mortgage

Document Number	0003660386
Date	Jun 12, 2018
Instrument	3660386

Lender

Name	CITIBANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Jul 1, 2048

March 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	BOULDER CO
Recording Date	Mar 13, 2018
Property Address	415 S 43RD ST, BOULDER, CO 80305-6007
Document Number	0003644893
Instrument Date	Mar 7, 2018
Instrument	3644893
Transaction Type	Transfer
Record Updated	Mar 20, 2018

Transaction

Tax	$0.00
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1605 RIVERSIDE ST MILES CITY MT 593012125, MILES CITY, MT 59301-2125

March 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	BOULDER CO
Recording Date	Mar 13, 2018
Property Address	415 S 43RD ST, BOULDER, CO 80305-6007
Document Number	0003644895
Instrument Date	Mar 7, 2018
Instrument	3644895
Transaction Type	Transfer
Record Updated	Mar 20, 2018

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	1605 RIVERSIDE ST MILES CITY MT 593012125, MILES CITY, MT 59301-2125

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		$50,014 (-0.66%) Land $33,701 Building $16,313	$805,500 (-) Land $565,600 Building $239,900
2025	$4,800.00 (+2.83%)	$50,344 (-12.82%) Land $35,350 Building $14,994	$805,500 (-6.54%) Land $565,600 Building $239,900
2023	$4,668.00 (+11.81%)	$57,747 (+28.42%) Land $41,419 Building $16,328	$861,900 (+33.21%) Land $618,200 Building $243,700
2022	$4,175.00	$44,967 Land $30,726 Building $14,241	$647,000 Land $442,100 Building $204,900

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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