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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/5503 THORNBURN ST
/// BUILDING FILE · ROLL 2025

5503 THORNBURN ST.

Los Angeles, CA 90045 · APN 4103-009-014

/// 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

3

BUILDING SF

2,726

SF / UNIT

909

YEAR BUILT

1952

BEDROOMS

5

BATHROOMS

3

USE · CODE 0300

TRIPLEX

/// ASSESSED VALUE
LAND$964,922
IMPROVEMENTS$412,739
TOTAL$1,377,661
LAND BASE YEAR2019
OWNERSHIP TENUREAPPROX. 7 YEARS

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

/// LAST TRANSFER
RECORDEDDEC 21, 2018

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 COVERED BY LA RSO

Built 1952 in the City of Los Angeles with 3 units — pre-October 1978 multifamily inside city limits is generally under the Rent Stabilization Ordinance, capping annual increases and restricting evictions.

HOW LA RSO WORKS →INFERRED FROM PUBLIC RECORDS — VERIFY WITH LAHD / ZIMAS BEFORE RELYING ON IT.
/// ZIP 90045

Recent sales nearby.

ADDRESSSOLDEST. PRICEEST. $/UNITUNITS
7106 FLIGHT AVE→DEC 2024EST.$1,475,000$245,833UNITS65500 THORNBURN ST→DEC 2024EST.$963,683$240,921UNITS46757 W 86TH PL→DEC 2024EST.$925,000$462,500UNITS28939 READING AVE→DEC 2024EST.$1,336,000$334,000UNITS47127 RAMSGATE AVE→NOV 2024EST.$1,457,500$364,375UNITS46421 W 86TH PL→NOV 2024EST.$1,092,966$546,483UNITS29038 READING AVE→NOV 2024EST.$2,350,000$783,333UNITS35410 THORNBURN ST→OCT 2024EST.$1,270,000$317,500UNITS4

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

/// COMPARE

Buildings like this one.

ON THORNBURN ST · ZIP 90045

5400 THORNBURN ST→3 UNITS · BUILT 1950 · TRIPLEX5401 THORNBURN ST→5 UNITS · BUILT 1956 · 5+ UNITS5409 THORNBURN ST→2 UNITS · BUILT 1949 · DUPLEX5410 THORNBURN ST→4 UNITS · BUILT 1949 · FOURPLEX5416 THORNBURN ST→4 UNITS · BUILT 1949 · FOURPLEX5417 THORNBURN ST→4 UNITS · BUILT 1952 · FOURPLEX

SIMILAR SIZE AND ERA IN 90045

5242 KNOWLTON ST→3 UNITS · BUILT 1952 · 3,669 SF5416 ALVERN CIR→3 UNITS · BUILT 1951 · 3,366 SF5430 THORNBURN ST→3 UNITS · BUILT 1952 · 2,418 SF5740 MORLEY ST→3 UNITS · BUILT 1950 · 2,280 SF5748 MORLEY ST→3 UNITS · BUILT 1950 · 2,280 SF5931 W 79TH ST→3 UNITS · BUILT 1949 · 2,589 SF
EVERY BUILDING IN 90045 →RSO, 5–12 UNITS →LAND WORTH MORE THAN THE BUILDING →
/// COMMON QUESTIONS · 5503 THORNBURN ST

The short answers.

Is 5503 Thornburn St rent controlled?

Built 1952 in the City of Los Angeles with 3 units — pre-October 1978 multifamily inside city limits is generally under the Rent Stabilization Ordinance, capping annual increases and restricting evictions. 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 5503 Thornburn St have?

County records list 3 units at 5503 Thornburn St, classified as triplex across 2,726 square feet of building area, averaging about 909 square feet per unit. Unit counts on the roll can lag permitted conversions and unpermitted additions in both directions.

When was 5503 Thornburn St built?

The assessor roll gives a build year of 1952, 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 5503 Thornburn St last change hands?

The most recent transfer on the roll was recorded December 2018. 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 5503 Thornburn St assessed at, and is that what it is worth?

The current assessed value is $1,377,661 ($964,922 land, $412,739 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.

How do I find out what 5503 Thornburn 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.

WHAT'S IT WORTH_TALK TO SHAYA →

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