520 Mapleton Ave, Boulder, CO 80304 Property Records

Boulder County property record for 520 Mapleton Ave, Boulder, CO 80304 · Last verified June 2026

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	4 Beds
Bathrooms	2 Baths
Year Built	Built 1985
Square Footage	1,928 sqft Living Area
Lot Size	7,121 sqft (0.164 acres)
Garage	Detached, 391 sqft
Last Sale	$1,725,000 (2023)
Tax Bill	$10,161.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`1461-25-4-08-003`
Alternative APNs	`R0000606` `0000606`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	7 Rooms
Building Area	1,928 sqft Living Area
Gross Area	1,988 sqft Gross Area
1st Floor	1,339 sqft 1st Floor
Upper Floors	589 sqft Upper Floors
Stories	2 Stories
Interior Structure	Plaster Interior Structure

Exterior

Year Built	Built 1958
Effective Year Built	Effective 1985
Exterior Material	Brick Veneer Exterior
Construction Type	Masonry/Concrete Masonry Units (CMUs) Construction
Roof Material	Asphalt Roof
Lot Area	7,121 sqft (0.164 acres)
Parking Spaces	1 Parking Spaces
Garage Type	Detached Garage
Garage Area	391 sqft Garage
Porch	Enclosed Porch
Porch Area	60 sqft Porch

Utilities and HVAC

Heating System	Forced Air with Air Conditioning Heating

Location & Zoning

Account Number	R0000606
Street Address	520 MAPLETON AVE
City	BOULDER
State	CO
Zip	80304-3986
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	LOTS 8-9 BLK 5 MAPLETON
Legal Range	71
Legal Township	1N
Legal Section	25
Legal Subdivision	MAPLETON - BO
Legal Block	5
Legal Lot Number	8
Jurisdiction	BOULDER CO
Minor Civil Division	BOULDER
Census Blockgroup	4
Census Block	4012
Census Tract	12101

Owner

Source: Boulder County records · APN 1461-25-4-08-003

Assessment roll updated June 15, 2026 · Last verified June 2026

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

Owner of Record	Individual Owner on File
Mailing Address	520 MAPLETON AVE, BOULDER, CO 80304-3986
Owner Type	Owner is a Company
Vesting	Owner is a Trust, Revocable Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Known Transactions	Last Sale Amount on Jan 17, 2023 Deed Sale Price on Jan 17, 2023 Prior Sale Amount on Sep 09, 1986
Deed Doc Number	20233994708
Prior Transfer Date	Apr 27, 2009
Prior Transfer Doc	0002997958
Record Refreshed	Sep 20, 2026

January 2023: Warranty Deed, Transfer

Document Type	Warranty Deed
Jurisdiction	BOULDER CO
Recording Date	Jan 17, 2023
Property Address	520 MAPLETON AVE, BOULDER, CO 80304-3986
Document Number	0003994708
Instrument Date	Jan 13, 2023
Instrument	3994708
Transaction Type	Transfer
Record Updated	Jan 24, 2023
Title Company	HERITAGE TITLE COMPANY

Transaction

Amount	Amount Recorded
Tax	$172.50
Amount Accuracy	Full Amount Stated
Additional	Arms Length Transaction

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	520 MAPLETON AVE, BOULDER, CO 80304-3986

Tax Assessment & Valuation

Source: Boulder County records · Assessment roll updated June 15, 2026 · Last verified June 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

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.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$115,954 (+8.8%) Land $83,212 Building $32,742	$1,705,200 (-) Land $1,223,700 Building $481,500
2025	$10,161.00 (-3.53%)	$106,575 (-15.19%) Land $76,481 Building $30,094	$1,705,200 (-9.08%) Land $1,223,700 Building $481,500
2023	$10,533.00 (-5.9%)	$125,659 (+4.95%) Land $106,329 Building $19,330	$1,875,500 (+8.87%) Land $1,587,000 Building $288,500
2022	$11,193.00	$119,728 Land $80,245 Building $39,483	$1,722,700 Land $1,154,600 Building $568,100