309 Mapleton Ave, Boulder, CO 80304 Property Records

Boulder County property record for 309 Mapleton Ave, Boulder, CO 80304 · Last verified June 2026

Property Highlights

Property Type	Other > Exempt (Full or Partial)
Lot Size	2.71 acres

Primary APN	`1461-25-2-00-012`
Alternative APNs	`R0121714` `0121714`

Lot Area	118,251 sqft

Account Number	R0121714
Street Address	309 MAPLETON AVE
City	BOULDER
State	CO
Zip	80304
Property Usage	Other Property Usage
Type	Other > Exempt (Full or Partial)
Legal Description	PT N1/2 SE 1/4 NW 1/4 W OF MOUNTAIN HEIGHTS SUB PER DEEDS 1554295 & 1554297 10/11/95 BCR 3 ACS SPLIT FROM ID 85709/DEED 11/95
Legal Range	71
Legal Township	1N
Legal Section	25
Legal Subdivision	TR, NBR 191, 192 - COMMERCIAL
Legal Block	1
Jurisdiction	BOULDER CO
Minor Civil Division	BOULDER
Census Blockgroup	1
Census Block	1007
Census Tract	12101

Source: Boulder County records · APN 1461-25-2-00-012

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.

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

Type	Name
State	Colorado
County	Boulder County
Municipality	Boulder City
Unified School District	Boulder Valley School District RE-2 (PK - 12)

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Year	Tax Bill	Assessed Value	Assessed Market Value
2026		$2,089,620 (-3.7%) Land $2,089,620	$8,037,000 (-) Land $8,037,000
2025	Additional exemption filed	$2,169,990 (+109.34%) Land $2,169,990	$8,037,000 (+116.32%) Land $8,037,000
2023	Additional exemption filed	$1,036,573 Land $1,036,573	$3,715,314 Land $3,715,314