845 12th St Boulder, CO 80302 / 7520

Residence for Single Family

(UPDATED: 07/29/2025)
  • 5 Beds
  • 2 Baths
  • 4.130 square feet
Property Report

Information about property on 845 12th St, Boulder CO, 80302-7520. Find out owner contacts, building history, price, neighborhood at Homemetry Address Directory.

Property Details

At 845 12th Street, Boulder, Colorado there is a large single-family A-Frame home.

Facts

  • Built in 1908
  • Lot size 6,098 sqft
  • Floor size 4,130 sqft
  • Construction Masonry
  • Rooms 12
  • Bedrooms 5
  • Last remodel year 1989
  • Style A-Frame
  • Basement Basement (not specified)
  • Heating & Cooling
  • Heat type Hot Water
  • Exterior Home Features
  • Exterior walls Wood
  • Roof type Asphalt
  • Parking & Garage
  • Parking Detached Garage
  • Parking spaces 2

Misc

  • Units 1

Listing info

  • Last sold Apr 1993 for $379,000

Householders and Tenants for 845 12th St, Boulder CO

Possible residents contact details

Person Name Phone Number Additional Info
A S Kauffman Age: 71
Anthony Knickerbocker
303-449-****
Arnie Jacobson
303-415-****
Arnold A Jacobson Age: 66
303-415-****
Residential status:
Homeowner
Job:
Professional/Technical
Lucy S Jacobson Age: 34
303-415-****
Residential status:
Homeowner
Oliver M Jacobson Age: 37
303-415-****
Residential status:
Homeowner
Ronald Rzesniowiecki Age: 78
Victoria A Johns
303-415-****
Victoria J Jacobson Age: 67
303-415-****
Residential status:
Homeowner
Job:
Service Occupations

Cost estimate history

YearTaxAssessmentMarket
2014 N/A $96,722 N/A
2013 $8,132 N/A $1,215,100

Where is 845 12th St, Boulder CO located on map?

Building Permits

To date, we have no information about building permits in 2025
Feb 23, 2016
Description: Kitchen remodel of 100 sq.ft. scope of work includes associated meps, to include electrical wiring & new can lights, gas piping, and replacing of plumbing fixtures (only).
  • Valuation: $1,100,000
  • Client: Arnold Jacobson
  • Parcel #: #0007934
  • Permit #: PMT2016-00762
Nov 14, 2013
Description: Total tear off and reroof of existing residence with 22 squares of certainteed presidential tl shingles on roof pitch represented as 6/12.
  • Client: Arnold Jacobson
  • Parcel #: 0007934
  • Permit #: PMT2013-06434
Sep 6, 2011
Description: Electrical permit for 200 amp service change on single-family residence.
  • Client: Arnold Jacobson
  • Parcel #: 0007934
  • Permit #: PMT2011-03802
Jul 12, 2007
Description: Add new deck off second floor. 96 sf
  • Valuation: $183,300
  • Client: Victoria Johns
  • Parcel #: 0007934
  • Permit #: PMT2007-02888
Jun 11, 2004
Description: Construct new retaining with stairs as shown on attached plans.
  • Client: Arnold Jacobson
  • Parcel #: 0007934
  • Permit #: PMT2004-02236

12th St Fire Incident History

To date, we have no information about fire incidents in 2025
28 Dec 2019 Building fires
Property Use —
Multifamily dwellings
Area of Origin —
Bathroom, checkroom, lavatory, locker room
First Ignition —
Electrical wire, cable insulation
Heat Source —
Spark, ember or flame from operating equipment
28 Jun 2018 Special outside fire, other
Property Use —
Multifamily dwellings
Area of Origin —
Outside area, other
First Ignition —
Organic materials, other
Heat Source —
Hot or smoldering object, other
25 Oct 2015 Natural vegetation fire, other
Property Use —
Outside or special property, other
Area of Origin —
Outside area, other
First Ignition —
Decoration
Heat Source —
Flame/torch used for lighting
03 Oct 2008 Building fires
Property Use —
Sorority house, fraternity house
Area of Origin —
Egress/exit, other
First Ignition —
Flammable liquid/gas - in/from final container
Heat Source —
Heat source: other

View more

12 St Incidents registered in FEMA
(Federal Emergency Management Agency)

To date, we have no information about incidents registered in FEMA in 2025
29 Mar 2015 Unauthorized burning
Property Use —
Multifamily dwellings
11 Oct 2014 Outside rubbish, trash or waste fire
Property Use —
Sorority house, fraternity house
05 Mar 2014 Gas leak (natural gas or LPG)
Property Use —
Sorority house, fraternity house
15 Jan 2014 Gas leak (natural gas or LPG)
Property Use —
Street or road in commercial area

View more

Properties Nearby

Street AddressResidens/Landlords
620 12 St, Boulder, CO 80302-7517
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  • 4 baths
  • 6,773 sqft
  • Built in 1917
Martha Medina, Marcela Medinasanchez
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  • 1.5 baths
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  • Built in 1927
L Hagen, L L Wilson
800 12 St, Boulder, CO 80302-7521
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  • 2.5 baths
  • 2,730 sqft
  • Built in 1950
Emily M Kelton, Margaret Schatz
844 12 St, Boulder, CO 80302-7521
Single Family Residential
  • 2 beds
  • 1 bath
  • 2,165 sqft
  • Built in 1920
Alpine Hydroecology, Christopher Campbell Armstrong
855 12 St, Boulder, CO 80302-7520
Single Family Residential
  • 3 beds
  • 2 baths
  • 2,216 sqft
  • Built in 1950
Lauren Fowler, Anna D Goodnow
916 12 St, Boulder, CO 80302-7209
Single Family
  • 4 beds
  • 3 baths
  • 2,860 sqft
  • Built in 1923
Frank L Marice, Frank L Marics
945 12 St, Boulder, CO 80302-7208
Single Family Residential
  • 3 beds
  • 1 bath
  • 2,802 sqft
  • Built in 1939
Alice R Bruns, Geoffrey S Johnson
969 12 St, Boulder, CO 80302-7208
Single Family Residential
  • 4 beds
  • 2 baths
  • Lot: 7,623 sqft
  • Built in 1937
Carrie L Crawford, Heidi J Freiburger
1037 12 St, Boulder, CO 80302-7265
Multi-Family Home
  • 13 beds
  • 6 baths
  • Lot: 6,229 sqft
  • Built in 1895
Anna Cristina Arguello, Benjamin Assini
1045 12 St, Boulder, CO 80302-7285
Multi Family
  • 11 beds
  • 6 baths
  • 5,058 sqft
  • Built in 1906
Rachel Altman, Adrian Amodeo
 

FAQ about the house at 845 12 St, Boulder, CO


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