bridgeMLS, Bay East AOR, or Contra Costa AOR #27450559
Jun 27, 1997
Sold
$401,250
Apr 25, 1997
Listing Removed
—
Mar 22, 1997
Listed
$439,000
Public Records
Nov 3, 1977
Sold
$91,000
Year
Property tax
Land + Additions
Assessment*
2025
$13,790 (+6.0%)
$196,082 + $457,308
$653,390
2024
$13,004 (+1.7%)
$196,082 + $457,308
$653,390
2023
$12,782 (+2.8%)
$192,237 + $448,342
$640,579
2022
$12,429 (+4.1%)
$184,774 + $430,935
$615,709
2021
$11,935 (+0.6%)
$184,774 + $430,935
$615,709
2020
$11,859 (+3.0%)
$181,151 + $422,486
$603,637
2019
$11,509 (+3.4%)
$179,294 + $418,156
$597,450
2018
$11,134 (+0.4%)
$175,780 + $409,959
$585,739
2017
$11,090 (+7.2%)
$168,956 + $394,043
$562,999
2016
$10,348 (+0.4%)
$168,956 + $394,043
$562,999
2015
$10,304 (+1.7%)
$165,643 + $386,319
$551,962
2014
$10,131 (+0.3%)
$159,961 + $373,065
$533,026
2013
$10,101 (+3.5%)
$159,961 + $373,065
$533,026
2012
$9,755 (+0.5%)
$159,238 + $371,380
$530,618
2011
$9,704 (+2.9%)
$156,116 + $364,099
$520,215
2010
$9,429 (−0.9%)
$153,056 + $356,961
$510,017
2009
$9,512 (+8.9%)
$151,912 + $354,293
$506,205
2008
$8,735
$152,273 + $355,136
$507,409
Tax history for 20 Prospect Rd
Year
Property tax
Land + Additions
Assessment*
2025
$13,790 (+6.0%)
$196,082 + $457,308
$653,390
2024
$13,004 (+1.7%)
$196,082 + $457,308
$653,390
2023
$12,782 (+2.8%)
$192,237 + $448,342
$640,579
2022
$12,429 (+4.1%)
$184,774 + $430,935
$615,709
2021
$11,935 (+0.6%)
$184,774 + $430,935
$615,709
2020
$11,859 (+3.0%)
$181,151 + $422,486
$603,637
2019
$11,509 (+3.4%)
$179,294 + $418,156
$597,450
2018
$11,134 (+0.4%)
$175,780 + $409,959
$585,739
2017
$11,090 (+7.2%)
$168,956 + $394,043
$562,999
2016
$10,348 (+0.4%)
$168,956 + $394,043
$562,999
2015
$10,304 (+1.7%)
$165,643 + $386,319
$551,962
2014
$10,131 (+0.3%)
$159,961 + $373,065
$533,026
2013
$10,101 (+3.5%)
$159,961 + $373,065
$533,026
2012
$9,755 (+0.5%)
$159,238 + $371,380
$530,618
2011
$9,704 (+2.9%)
$156,116 + $364,099
$520,215
2010
$9,429 (−0.9%)
$153,056 + $356,961
$510,017
2009
$9,512 (+8.9%)
$151,912 + $354,293
$506,205
2008
$8,735
$152,273 + $355,136
$507,409
*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.
Public record
Public record
Zoning
Permits
Beds
3
Baths
2
Stories
2
Lot width
—
Lot depth
—
Lot size
5,145 Sq. Ft.
Year renovated
1925
Sq. Ft.
1,909
Year built
1925
Style
Single Family Residential
County
Alameda County
APN
051 473703700
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Jul 27, 2026.
SFR
Single Family Residential
The intent is to: Preserve, protect and enhance Piedmont's residential character, protecting the quiet, family atmosphere of neighborhoods.; Protect residents from the harmful effects of excessive noise, light deprivation, intrusions on privacy, overcrowding, excessive traffic, insufficient parking, blockage of significant views, and other adverse environmental impacts.; Maintain openness and areas of vegetation between residences to enhance a healthy environment.; Achieve design compatibility between additions, remodeling and other new construction by establishing development standards.; Minimize the out-of-scale appearance of large homes, parking areas, and other development relative to the lot size and to other homes in a neighborhood.
Aug 26, 2025 • Final
Mechanical
Add a new heat pump to an existing heating and air conditioning system. Install a new electrical circuit for the unit.
Heat pump
HVAC
Oct 7, 2019 • Final
Mechanical
Remove and replace the existing furnace in a residential building.
HVAC
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property information provided by bridgeMLS, Bay East AOR, or Contra Costa AOR when last listed in 1997. This data may not match public records. Learn more.