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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/623 PROSPECT AVE
/// BUILDING FILE · ROLL 2025

623 PROSPECT AVE.

Hermosa Beach, CA 90254 · APN 4186-014-017

/// 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

4

BUILDING SF

2,083

SF / UNIT

521

YEAR BUILT

1942

BEDROOMS

5

BATHROOMS

4

USE · CODE 0400

FOURPLEX

/// ASSESSED VALUE
LAND$1,647,935
IMPROVEMENTS$93,777
TOTAL$1,741,712
LAND BASE YEAR2007
OWNERSHIP TENUREAPPROX. 19 YEARS

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

/// LAST TRANSFER
RECORDEDNOV 13, 2006

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 90254

Recent sales nearby.

ADDRESSSOLDEST. PRICEEST. $/UNITUNITS
934 MANHATTAN AVE→DEC 2024EST.$1,650,000$550,000UNITS3720 21ST ST→DEC 2024EST.$10,400,000$520,000UNITS2024 11TH CT→DEC 2024EST.$2,415,000$805,000UNITS3947 MONTEREY BLVD→DEC 2024EST.$1,700,000$850,000UNITS263 16TH ST→DEC 2024EST.$3,400,000$1,700,000UNITS256 15TH ST→DEC 2024EST.$2,115,128$528,782UNITS41217 OWOSSO AVE→NOV 2024EST.$1,360,000$680,000UNITS22158 MONTEREY BLVD→NOV 2024EST.$7,000,000$3,500,000UNITS2

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

/// COMPARE

Buildings like this one.

ON PROSPECT AVE · ZIP 90254

1002 PROSPECT AVE→3 UNITS · BUILT 1955 · TRIPLEX1003 PROSPECT AVE→15 UNITS · BUILT 1954 · 5+ UNITS1006 PROSPECT AVE→3 UNITS · BUILT 1955 · TRIPLEX1027 PROSPECT AVE→2 UNITS · BUILT 1954 · DUPLEX1030 PROSPECT AVE→2 UNITS · BUILT 1956 · DUPLEX1101 PROSPECT AVE→2 UNITS · BUILT 1956 · DUPLEX

SIMILAR SIZE AND ERA IN 90254

1046 4TH ST→4 UNITS · BUILT 1954 · 2,388 SF1126 MONTEREY BLVD→4 UNITS · BUILT 1937 · 2,081 SF1312 MONTEREY BLVD→4 UNITS · BUILT 1931 · 3,451 SF135 28TH ST→4 UNITS · BUILT 1956 · 2,488 SF135 30TH ST→4 UNITS · BUILT 1954 · 2,243 SF136 33RD ST→4 UNITS · BUILT 1956 · 1,936 SF
EVERY BUILDING IN 90254 →LAND WORTH MORE THAN THE BUILDING →
/// COMMON QUESTIONS · 623 PROSPECT AVE

The short answers.

Is 623 Prospect Ave 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 623 Prospect Ave have?

County records list 4 units at 623 Prospect Ave, classified as fourplex across 2,083 square feet of building area, averaging about 521 square feet per unit. Unit counts on the roll can lag permitted conversions and unpermitted additions in both directions.

When was 623 Prospect Ave built?

The assessor roll gives a build year of 1942, 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 623 Prospect Ave last change hands?

The most recent transfer on the roll was recorded November 2006. 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 623 Prospect Ave assessed at, and is that what it is worth?

The current assessed value is $1,741,712 ($1,647,935 land, $93,777 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 19 years.

Would the owner of 623 Prospect Ave face a big tax bill on a sale?

Possibly. A base year going back roughly 19 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 623 Prospect Ave 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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