FIRST TIME ON THE MARKET: Recently featured by Architectural Digest, this masterwork by San Diego architect Kendrick Bangs Kellogg resides high atop its 40-acre Valley Center parcel offering 360-degree views through expansive walls of glass. The hand-crafted organic architecture and landscape melds together offering an array of intimate spaces scaled for everyday living. Inspired to return to their agrarian roots, in 1972 the family purchased a 40 acre plot and planted over 900 avocado trees. Designed by the architect in 1984, the home of glass and wood with rock walls sourced from the surrounding property took 6 years to build. Nestled amongst the avocado grove, the home’s high perch lends itself to breathtaking 360 degree views of the area through the floor to ceiling windows. With 5 bedrooms and 3 bathrooms, as well as two fireplaces and custom woodwork throughout, this home captures some of Kellogg’s most inspired work, blurring the line between nature and home, between architecture and sculpture.
Single-familyProperty Type
1991Year Built
$532Price/Sq.Ft.
3 garage spacesParking
Listed by Keith York•DRE #01874926• Agents of Architecture
•619-417-2651 (agent)
•keith@modernsandiego.com (agent)
Bought with Keith York•DRE #01874926• Agents of Architecture
Est. $5,883 per month, based on comparable rentals
Sale and tax history for 10650 Old Castle Rd
Sale History
Tax History
Date
Event
Price
SDMLS #250043644
Aug 20, 2026
Sold
$2,200,000
$532/sq ft
May 28, 2026
Pending
—
Feb 2, 2026
Price Changed
$2,695,000
$652/sq ft
Nov 7, 2025
Listed
$2,995,000
$725/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$15,686 (+2.1%)
$262,642 + $1,011,565
$1,274,207
2024
$15,360 (+2.2%)
$257,493 + $991,731
$1,249,224
2023
$15,029 (+1.8%)
$252,445 + $972,286
$1,224,731
2022
$14,771 (+1.9%)
$247,496 + $953,222
$1,200,718
2021
$14,497 (+1.0%)
$242,644 + $934,532
$1,177,176
2020
$14,350 (−0.3%)
$237,887 + $916,208
$1,154,095
2019
$14,392 (+2.5%)
$235,448 + $906,814
$1,142,262
2018
$14,036 (+2.0%)
$230,832 + $889,034
$1,119,866
2017
$13,765 (−0.1%)
$221,869 + $854,512
$1,076,381
2016
$13,785 (+0.8%)
$221,869 + $854,512
$1,076,381
2015
$13,673 (+2.2%)
$217,519 + $837,757
$1,055,276
2014
$13,377 (+10.1%)
$210,056 + $809,010
$1,019,066
2013
$12,152 (−6.3%)
$210,056 + $809,010
$1,019,066
2012
$12,965 (+2.2%)
$300,000 + $620,000
$920,000
2011
$12,683 (+1.1%)
$205,273 + $790,591
$995,864
2010
$12,550 (+1.1%)
$201,249 + $775,090
$976,339
2009
$12,413 (+2.1%)
$199,745 + $769,298
$969,043
2008
$12,156
$200,220 + $771,126
$971,346
Public record
Public record
Zoning
Beds
5
Baths
4
Stories
—
Lot width
—
Lot depth
—
Lot size
40.45 Acres
Year renovated
1991
Sq. Ft.
4,133
Year built
1991
Style
Single Family Residential
County
San Diego County
APN
1850410100
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Aug 28, 2026.
A70
Limited Agricultural Zone
The A70 Use Regulations are intended to create and preserve areas intended primarily for agricultural crop production. Additionally, a limited number of small farm animals may be kept and agricultural products raised on the premises may be processed.
Typically, the A70 Use Regulations would be applied to areas throughout the County to protect moderate to high quality agricultural land.