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© 2026 SHAYA LOWENSTEIN · LYON STAHL INVESTMENT REAL ESTATE830 S PACIFIC COAST HWY, SUITE D-200, EL SEGUNDO, CA 90245SHAYA@LYONSTAHL.COM · DRE #01942326
BUILDINGS/21503 MAIN ST
/// BUILDING FILE · ROLL 2025

21503 MAIN ST.

Carson, CA 90745 · APN 7343-011-067

/// WHERE DO WE REACH YOU?

ONE EMAIL, USED TO KEEP THIS LIST AND TO TELL YOU IF A WATCHED BUILDING LISTS OR SELLS. UNSUBSCRIBE ANY TIME.

UNITS

2

BUILDING SF

2,970

SF / UNIT

1,485

YEAR BUILT

1957

BEDROOMS

6

BATHROOMS

3

USE · CODE 0200

DUPLEX

/// ASSESSED VALUE
LAND$210,664
IMPROVEMENTS$151,568
TOTAL$362,232
LAND BASE YEAR1975
OWNERSHIP TENUREAPPROX. 51 YEARS

PROP 13 ASSESSED VALUES — USUALLY WELL BELOW MARKET ON LONG-HELD BUILDINGS.

/// LAST TRANSFER
RECORDEDJAN 10, 1989

No market sale detected on this parcel since 2021. The last recorded transfer may have been a refinance, trust move, or family transfer that didn't reset the Prop 13 base.

/// RENT CONTROL

LIKELY UNDER AB 1482 STATE CAP (5% + CPI, MAX 10%)

Outside LA RSO coverage on these records — most California multifamily over 15 years old falls under the AB 1482 statewide cap of 5% plus CPI, never more than 10% per year.

AB 1482 VS RSO →INFERRED FROM PUBLIC RECORDS — VERIFY WITH LAHD / ZIMAS BEFORE RELYING ON IT.
/// ZIP 90745

Recent sales nearby.

ADDRESSSOLDEST. PRICEEST. $/UNITUNITS
332 W 214TH ST→DEC 2024EST.$1,415,000$471,667UNITS320848 JAMISON AVE→DEC 2024EST.$1,302,576$651,288UNITS2105 W CLARION DR→DEC 2024EST.$850,000$283,333UNITS321036 SHEARER AVE→DEC 2024EST.$710,000$355,000UNITS2334 1/2 E 220TH ST→NOV 2024EST.$2,100,000$420,000UNITS5229 E 219TH ST→OCT 2024EST.$2,000,000$285,714UNITS721028 MARTIN ST→JUL 2024EST.$750,000$375,000UNITS222121 AVALON BLVD→JUN 2024EST.$5,650,000$61,413UNITS92

PRICES ESTIMATED FROM ASSESSOR REASSESSMENT AT SALE (ASSESSED VALUE DEFLATED 2%/YR) — NOT VERIFIED CLOSING PRICES.

/// COMPARE

Buildings like this one.

ON MAIN ST · ZIP 90745

21032 MAIN ST→2 UNITS · BUILT 1957 · DUPLEX21205 MAIN ST→34 UNITS · BUILT 2019 · 5+ UNITS21205 MAIN ST→12 UNITS · BUILT 2019 · 5+ UNITS21735 MAIN ST→45 UNITS · BUILT 1992 · 5+ UNITS21811 MAIN ST→101 UNITS · BUILT 1980 · 5+ UNITS21811 MAIN ST→101 UNITS · BUILT 1980 · 5+ UNITS

SIMILAR SIZE AND ERA IN 90745

113 E 216TH ST→2 UNITS · BUILT 1947 · 1,914 SF1132 E LAUDER ST→2 UNITS · BUILT 1953 · 1,624 SF1218 E 213TH ST→2 UNITS · BUILT 1955 · 1,942 SF1244 E 213TH ST→2 UNITS · BUILT 1948 · 2,436 SF133 W 219TH ST→2 UNITS · BUILT 1959 · 2,874 SF1544 E ABILA ST→2 UNITS · BUILT 1942 · 1,623 SF
EVERY BUILDING IN 90745 →
/// COMMON QUESTIONS · 21503 MAIN ST

The short answers.

Is 21503 Main St rent controlled?

Outside LA RSO coverage on these records — most California multifamily over 15 years old falls under the AB 1482 statewide cap of 5% plus CPI, never more than 10% per year. This is an inference from public assessor records, not a determination — confirm the certificate of occupancy date with the LA Housing Department or ZIMAS before you rely on it for pricing or notices.

How many units does 21503 Main St have?

County records list 2 units at 21503 Main St, classified as duplex across 2,970 square feet of building area, averaging about 1,485 square feet per unit. Unit counts on the roll can lag permitted conversions and unpermitted additions in both directions.

When was 21503 Main St built?

The assessor roll gives a build year of 1957, which puts it in the pre-1979 stock that the LA Rent Stabilization Ordinance generally covers inside city limits. Age drives more than character here: it sets rent-cap exposure, seismic retrofit obligations, and what a lender will underwrite.

When did 21503 Main St last change hands?

The most recent transfer on the roll was recorded January 1989. Not every recorded transfer is a market sale — refinances, trust transfers, and family conveyances all appear in the same field, and those do not reset the assessed value.

What is 21503 Main St assessed at, and is that what it is worth?

The current assessed value is $362,232 ($210,664 land, $151,568 improvements). Assessed value is not market value. Under Proposition 13 it resets only on a change of ownership and then climbs about 2% a year, so a long-held building is often assessed far below what it would trade for — and this one has held its base year for roughly 51 years.

Would the owner of 21503 Main St face a big tax bill on a sale?

Possibly. A base year going back roughly 51 years usually means a low tax basis, and a low basis means a large taxable gain on a straight sale — capital gains plus depreciation recapture, with California taxing gains at ordinary income rates. It is also why long-held buildings so often sell through a 1031 exchange instead, or pass through an estate for the step-up in basis.

How do I find out what 21503 Main St would sell for today?

Public records give you the frame — units, size, age, assessed value, when it last traded — but pricing needs in-place rents, expenses, and the condition of the units, none of which appear in county data. A broker valuation puts closed comps and a rent survey against the actual rent roll. Shaya Lowenstein does that free for LA multifamily owners, typically within 48 hours, with no obligation to list.

/// OWNER READING
WHAT IS MY BUILDING WORTH? →SELLING WITH TENANTS IN PLACE →HOW LA RSO WORKS →

Own this building?

FREE, CONFIDENTIAL VALUATION FROM CLOSED COMPS — 48H TURNAROUND.

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