OPEN SUN, 2PM TO 5PM

For sale

$19,995,000

Est. $134,308/mo —

•

8,400

sq ft

439 21st St, Santa Monica, CA 90402

About this home

Expected Completion: Fall 2026! Presenting a resort-inspired lifestyle at the prestigious and modern ENCORE, a masterfully designed residence situated in one of the most renowned zip codes in Southern California, 90402, north of Montana Avenue. From this highly coveted 21st Street location, behold striking vistas of the Pacific and discover calming ocean breezes amidst prime shopping and fine dining. This serene sanctuary affords absolute luxury, offering a unique design with an open floor plan and world-class amenities. There are seven bedrooms, seven bathrooms, a powder room, elevator, double-island kitchen fitted with state-of-the-art appliances, two wet bars, four fireplaces, and folding doors that open to invite gentle ocean winds within. Experience a life rich in comfort and leisure with an expansive rooftop deck, standalone 1,000-square-foot two-story ADU, Junior ADU, movie theatre, wine cellar, and meditation room. The rear grounds are an entertainer's dream, including a pool and spa with eight-jet water feature and LED lighting, outdoor fireplace, grassy play areas, and multiple spaces for lounging. The home's elegant form is constructed while keeping openness and clarity top of mind, allowing its light-filled interiors to seamlessly converge with the lush exteriors enveloped by soothing ocean breezes. Four levels comprise a rooftop, upper level, lobby, and basement, with a two-car garage and separate ADU. Welcome to this exquisite property offering the ultimate in resort living at the very forefront of chic, modern design. Renderings are of a similar build.

Single-familyProperty Type

2026Year Built

8,937 sq ftLot Size

$2,380Price/Sq.Ft.

2 car garageParking

Listed by Nicole Plaxen •DRE #01772151 • Sotheby's International Realty

•310-710-7167 (agent)

•nicole@waltersplaxen.com (agent)

Listed by Sally Forster Jones •DRE #00558939

•310-579-2200 (agent)

•showings@sallyforsterjones.com (agent)

Listing updated: Oct 21, 2026 at 12:31pm

Redfin checked: 2 minutes ago

•Source:TheMLS #25541291

Payment calculator

$134,308 per month

Principal and interest$110,480

Property taxes

$20,828

HOA dues

Home insurance

$2,999

Utilities

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Open houses

Sunday, Oct 25

2:00pm - 5:00pm

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Around this home

Schools

K - 12
Preschool & daycare

Franklin Elementary School

Public K-5 • Assigned • 0.5mi

10/10

Lincoln Middle School

Public 6-8 • Assigned • 0.8mi

8/10

Santa Monica High School

Public 9-12 • Assigned • 2.1mi

9/10

Provided by GreatSchools

About Regent

Square

Regent Square, located between Montana Avenue and Wilshire Boulevard, is a residential and walkable Santa Monica neighborhood with tree-lined blocks and a low-rise streetscape. The neighborhood’s character concentrates around Montana Avenue near 7th Street, where sidewalk patios, independent boutiques, and coffee counters set a steady daytime rhythm. Architectural cues lean toward Spanish Revival and mid-century apartments, with tidy courtyards and small gardens. Palisades Park and the bluff-top path frame the westward edge with ocean air and long views. The Montana Avenue retail strip keeps daily errands on foot, while nearby cultural stops add a polished, local cadence.

Provided by Walk Score and Local Logic

Market insights

439 21st St · $19,995,000

DAYS ON MARKET

The average home goes pending in 46 days.

SALE-TO-LIST

Most homes are selling 0% below list price.

LIST PRICE

Median list price in this area is $1,085,746. (95% lower than this home)

PRICE DROP

18% of homes in this area have had a price drop in the past month.

Property details

Interior
Exterior
Finance

Living

Dining

Interior features
Basement
Elevator

Bathrooms
Seven full bathrooms
One half bathroom

Laundry & utility
Laundry area
Other laundry arrangements (see remarks)

Flooring
Other flooring

Heating & cooling
Central heating
A/C

Sale and tax history for 439 21st St

Sale History
Tax History

Date

Event

Price

TheMLS #25541291

May 20, 2025

Listed

$19,995,000

$2,380/sq ft

TheMLS #25511701

May 15, 2025

Sold

$5,450,000

$649/sq ft

Apr 1, 2025

Contingent

—

Mar 14, 2025

Listed

$5,700,000

$679/sq ft

Savvy investors, developers, and end-users: Presenting an unmissable opportunity to build a dream home in prime Santa Monica's highly coveted North of Montana neighborhood where property values are robust and demand is high. This flat 8,937-square-foot lot is your blank canvas, with demolition red tape already cleared by the current owner. This central location is unbeatable, with beaches, prime Brentwood, and the 10 Freeway all within a ten-minute drive. Enjoy the area's fantastic restaurants, the nearby Brentwood Country Mart, trendy boutiques, award-winning schools, and more.

TheMLS #22-203445

Oct 17, 2022

Sold

$4,200,000

$500/sq ft

Oct 10, 2022

Contingent

—

Sep 27, 2022

Listed

$3,995,000

$476/sq ft

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Year

Property tax

Land + Additions

Assessment*

2025

$53,448 (+6.5%)

$5,559,000

2024

$50,204 (+1.6%)

$3,495,744 + $873,936

$4,369,680

2023

$49,406 (+1,183.9%)

$3,427,200 + $856,800

$4,284,000

2022

$3,848 (+2.7%)

$3,360,000 + $840,000

$4,200,000

2021

$3,746 (+0.7%)

$171,404 + $137,024

$308,428

2020

$3,719 (+0.9%)

$168,044 + $134,338

$302,382

2019

$3,685 (+8.5%)

$166,321 + $132,961

$299,282

2018

$3,397 (+0.3%)

$163,060 + $130,354

$293,414

2017

$3,385 (+4.2%)

$156,729 + $125,294

$282,023

2016

$3,250 (+1.2%)

$156,729 + $125,294

$282,023

2015

$3,210 (+1.1%)

$153,656 + $122,838

$276,494

2014

$3,176 (−7.9%)

$148,384 + $118,623

$267,007

2012

$3,450 (+2.3%)

$147,714 + $118,087

$265,801

2011

$3,373 (+12.0%)

$144,818 + $115,772

$260,590

2010

$3,012 (+2.5%)

$141,979 + $113,502

$255,481

2009

$2,939 (−0.7%)

$140,918 + $112,654

$253,572

2008

$2,960

$141,253 + $112,922

$254,175

Public record

Public record
Zoning
Permits

Beds

Baths

Stories

—

Lot width

—

Lot depth

—

Lot size

8,937 Sq. Ft.

Year renovated

1951

Finished Sq. Ft.

2,248

Unfinished Sq. Ft.

—

Total Sq. Ft.

2,248

Year built

1925

Style

Single Family Residential

County

Los Angeles County

APN

4278028020

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Oct 6, 2026.

Single-Unit Residential District

Provide for single-unit housing on individual parcels at densities of one unit plus one accessory dwelling unit and one junior accessory dwelling unit to suit the spectrum of individual lifestyles and space needs and ensure continued availability of the range of housing opportunities necessary to meet the needs of all segments of the community consistent with the General Plan and State law.; Preserve and protect the existing character and state of the City's different residential neighborhoods and the quality of life of City residents against potential deleterious impacts related to development traffic, noise, air quality, and the encroachment of commercial activities.; Ensure adequate light, air, privacy, and open space for each dwelling.; Avoid overburdening public facilities, including sewer, water, electricity, and schools by an influx and increase of people to a degree larger than the City's geographic limits, tax base, or financial capabilities can reasonably and responsibly accommodate.; Ensure that the scale and design of new development and alterations to existing structures are consistent with the scale, mass, and character of the existing residential neighborhood.; Provide sites for institutional, residential, and neighborhood serving uses such as day care, parks, and community facilities.; Promote the rehabilitation and long-term maintenance of existing buildings and structures.

Permitted uses

Include but are not limited to:

Garden center
Housing-Single unit
Housing-Multiple units
Housing-Senior
Housing-Other
Infrastructure
Recreation
Park & open space

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

5/10 Fire Factor

6% chance of being in a wildfire in next 30 years

6/10 Heat Factor

7 days above 83° expected this year, 18 days in 30 years

1/10 Wind Factor

Minimal risk of severe winds over next 30 years

4/10 Air Factor

5 unhealthy days expected this year, 6 days in 30 years

Provided by First Street

Historical weather

Santa Monica, CA • 90402

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

83/ 100

Very good sunlight

Sunscore

This home ranks in the top 18% for direct sun exposure in Santa Monica. There appears to be minimal shading by surrounding buildings, terrain, and vegetation.

8 hrs

4.8 hrs

JuneDecember

Provided by Shadowmap

Redfin Estimate for 439 21st St

$18,970,924

$1.0M under list price of $20.0M

Nearby comparable homes

The Redfin Estimate uses 6 recent nearby sales, priced between $10.0M to $21.1M.

SOLD JUL 7, 2026
$10,650,000 Last sold price
6 beds8 baths6,370 sq ft
416 21st Pl, Santa Monica, CA 90402
$708/sq ft
2 years older
SOLD JUN 30, 2026
$10,000,000 Last sold price
7 beds9 baths7,452 sq ft
615 23rd St, Santa Monica, CA 90402
$1038/sq ft
1 year older
SOLD DEC 22, 2025
$14,500,000 Last sold price
8 beds7 baths— sq ft
1707 San Vicente Blvd, Santa Monica, CA 90402
larger lot
102 years older
no basement
SOLD JUL 29, 2026
$16,750,000 Last sold price
5 beds9 baths13,957 sq ft
1115 Georgina Ave, Santa Monica, CA 90402
$1180/sq ft
larger lot
5 years older
SOLD SEP 23, 2026
$10,750,000 Last sold price
4 beds6 baths4,072 sq ft
250 S Chadbourne Ave, Los Angeles, CA 90049
$260/sq ft
larger lot
83 years older
SOLD SEP 8, 2026
$21,145,000 Last sold price
5 beds9 baths9,710 sq ft
12921 Marlboro St, Los Angeles, CA 90049
$202/sq ft
larger lot
25 years older

Rental earnings

Est. $9,518 per month, based on comparable rentals

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