Seller's Agent in 2026
Jason Berns
Keller Williams Realty
(626) 243-4309
358 Total Sales
Estimated Value: $1,926,546 - $2,149,000
From the moment you arrive, the stature & grandeur of this remarkable residence are unmistakable. Welcome to the Upton Sinclair House, an iconic Spanish Colonial Revival estate originally built in 1923 & recognized as a Registered National Historic Landmark. Among the most storied homes in the City of Monrovia, this architectural treasure was purchased in 1942 by Pulitzer Prize-winning author Upton Sinclair, whose legacy remains deeply woven into the fabric of this extraordinary property. A custom stone-arched entry & handcrafted wood, wrought iron & glass front door introduce interiors rich in period detail & craftsmanship. Hardwood floors, intricate crown molding & a stone fireplace anchor the living room, which is framed by French doors that bring in abundant natural light. 2 of French doors open to a covered side patio, blending indoor & outdoor living. A masterfully carved wood archway with detailed pocket doors leads to the formal dining room. Multiple French doors open to intimate balconies & the side patio, creating an elegant setting. An intricately designed swinging door with stained glass detailing leads into the kitchen, where classic character meets thoughtful updates. Stone countertops, iconic black & white checkered flooring, stainless steel appliances & a cozy breakfast nook overlooking the garden. Pantry storage & access to the finished basement, currently housing laundry & a flexible bonus space, adds both charm & functionality. A custom interior wrought iron gate from the living area leads to the staircase to the 2nd level & a convenient 1/2 bathroom. Once upstairs, a barrel-ceiling hallway leads to 3 generously sized bedrooms. The primary suite features a decorative fireplace, multiple walk-in closets & French doors opening to private balconies. The ensuite bathroom accessible from both the hallway & primary showcases custom tilework, a pedestal sink & a glass-enclosed shower. Outdoors, a stone-laid patio with a covered lounge area & outdoor fireplace creates the perfect setting. The property includes a detached 2-car garage, bonus studio/storage space & a charming ADU with a kitchenette, 3/4 bathroom, a Murphy bed & a flexible living area. Thoughtfully designed landscaping & garden spaces wrap around the home. This rare offering combines architectural distinction & historical provenance, all supported by the financial benefits of a Mills Act designation. A once-in-a-generation opportunity for a true Southern California landmark
Last Agent to Sell the Property
Keller Williams Realty License #01787757 Listed on: 01/16/2026
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Buyer | Sale Price | Title Company |
|---|---|---|---|
| -- | None Listed On Document | ||
| $2,137,500 | Lawyers Title Company | ||
| -- | Calcounties Title Nation | ||
| -- | Calcounties Title Nation | ||
| -- | Accommodation | ||
| $1,100,000 | Chicago Title Company | ||
| $725,000 | -- | ||
| -- | First American | ||
| $135,000 | -- |
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Status | Borrower | Loan Amount |
|---|---|---|---|
| Previous Owner | $1,355,000 | ||
| Previous Owner | $413,000 | ||
| Previous Owner | $417,000 | ||
| Previous Owner | $440,000 | ||
| Previous Owner | $231,000 |
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Date | Event | Price | List to Sale | Price per Sq Ft |
|---|---|---|---|---|
| 02/19/2026 02/19/26 | Sold | $2,137,250 | +6.9% | $801 / Sq Ft |
| 01/16/2026 01/16/26 | For Sale | $1,999,000 | -- | $750 / Sq Ft |
We collect this data history from publicly available records. To have your information removed, we recommend requesting removal directly through your county’s website.
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2025 | $5,379 | $370,000 | $235,500 | $134,500 |
| 2024 | $5,345 | $370,000 | $235,500 | $134,500 |
| 2023 | $7,284 | $524,000 | $333,500 | $190,500 |
| 2022 | $7,369 | $537,000 | $341,700 | $195,300 |
| 2021 | $7,324 | $535,000 | $340,500 | $194,500 |
| 2019 | $6,309 | $465,000 | $297,500 | $167,500 |
| 2018 | $6,495 | $485,000 | $310,300 | $174,700 |
| 2016 | $5,373 | $397,200 | $254,150 | $143,050 |
| 2015 | $5,074 | $376,400 | $239,530 | $136,870 |
| 2014 | $4,688 | $341,700 | $217,400 | $124,300 |
Seller's Agent in 2026
Jason Berns
Keller Williams Realty
(626) 243-4309
358 Total Sales
Buyer's Agent in 2026
DARRELL DONE
Coldwell Banker Realty
(626) 354-3551
68 Total Sales
Source: Pasadena-Foothills Association of REALTORS®
MLS Number: P1-25479
APN: 8520-013-029
Ask me questions while you tour the home.