520 Maxwell Ave, Boulder, CO 80304 Property Records

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

Property Highlights

Property Type	Residential > Single Family > Home
Bedrooms	4 Beds
Bathrooms	3.75 Baths
Year Built	Built 2010
Square Footage	3,939 sqft Living Area
Lot Size	7,258 sqft (0.167 acres)
Occupancy	Owner Occupied
Last Sale	$755,000 (2011)
Tax Bill	$15,601.00 (2025)

Property Details

APN / Parcel Number

Primary APN	`1461-25-4-05-009`
Alternative APNs	`R0001159` `0001159`

Interior

Bedrooms	4 Beds
Full Baths	3.75 Baths
Partial Baths	3 Partial Baths
Total Rooms	11 Rooms
Building Area	3,939 sqft Living Area
Gross Area	4,056 sqft Gross Area
1st Floor	1,294 sqft 1st Floor
Upper Floors	1,126 sqft Upper Floors
Basement Area	1,636 sqft Basement
Finished Basement	1,519 sqft Finished
Unfinished Basement	117 sqft Unfinished
Stories	2 Stories
Interior Structure	Wallboard/Drywall Interior Structure

Exterior

Year Built	Built 1905
Effective Year Built	Effective 2010
Architectural Style	A-Frame Style
Exterior Material	Wood Shingle Exterior
Construction Type	Frame Construction
Roof Material	Asphalt Roof
Lot Area	7,258 sqft (0.167 acres)
Parking Spaces	2 Parking Spaces
Garage Area	400 sqft Garage
Deck Area	176 sqft Deck
Porch	Porch
Porch Area	476 sqft Porch

Utilities and HVAC

Heating System	Hot Water Heating

Location & Zoning

Account Number	R0001159
Street Address	520 MAXWELL AVE
City	BOULDER
State	CO
Zip	80304-3938
Property Usage	Residential Property Usage
Type	Residential > Single Family > Home
Legal Description	LOT 9 & E 15 FT LOT 10 BLK 4 MAPLETON
Legal Range	71
Legal Township	1N
Legal Section	25
Legal Subdivision	MAPLETON - BO
Legal Block	4
Legal Lot Number	9
Jurisdiction	BOULDER CO
Minor Civil Division	BOULDER
Census Blockgroup	4
Census Block	4005
Census Tract	12101

Owner

Source: Boulder County records · APN 1461-25-4-05-009

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 MAXWELL AVE, BOULDER, CO 80304-3938
Occupancy	Owner Occupied
Owner Type	Owner is an Individual, Couple or Unincorporated Entity

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Verified Name on Deed
Known Transactions	Last Sale Amount on Aug 25, 2011 Deed Sale Price on Aug 25, 2011 Prior Sale Amount on Jul 27, 2001
Deed Doc Number	20113167372
Prior Transfer Date	Jul 01, 2009
Prior Transfer Doc	0003021853
Record Refreshed	Sep 20, 2026

September 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	BOULDER CO
Property Address	520 MAXWELL AVE, BOULDER, CO 80304-3938
Transaction Type	Mortgage
Record Updated	Feb 05, 2021

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0003812644
Date	Sep 03, 2020
Instrument	3812644

Lender

Name	LOANDEPOT.COM LLC
Type	Mortgage Company
Address	FOOTHILL RANCH, CA 92610

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	360 Months
Due	Sep 01, 2050

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		$178,024 (+8.8%) Land $113,757 Building $64,267	$2,618,000 (-) Land $1,672,900 Building $945,100
2025	$15,601.00 (+1.71%)	$163,625 (-9.75%) Land $104,556 Building $59,069	$2,618,000 (-3.26%) Land $1,672,900 Building $945,100
2023	$15,339.00 (+21.25%)	$181,309 (+33.09%) Land $113,833 Building $67,476	$2,706,100 (+38.05%) Land $1,699,000 Building $1,007,100
2022	$12,651.00	$136,234 Land $73,538 Building $62,696	$1,960,200 Land $1,058,100 Building $902,100