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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/501 S MOUNTAIN AVE
/// BUILDING FILE · ROLL 2025

501 S MOUNTAIN AVE.

Mt Baldy, CA 91759 · APN 8675-014-004

/// 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

1,715

SF / UNIT

858

YEAR BUILT

1907

BEDROOMS

4

BATHROOMS

3

USE · CODE 0200

DUPLEX

/// ASSESSED VALUE
LAND$117,726
IMPROVEMENTS$166,215
TOTAL$283,941
LAND BASE YEAR1977
OWNERSHIP TENUREAPPROX. 49 YEARS

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

/// LAST TRANSFER
RECORDEDOCT 17, 2022

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.
/// COMPARE

Buildings like this one.

SIMILAR SIZE AND ERA IN 91759

498 MOUNTAIN AVE→2 UNITS · BUILT 1906 · 3,294 SF
EVERY BUILDING IN 91759 →BUILT BEFORE 1930 →
/// COMMON QUESTIONS · 501 S MOUNTAIN AVE

The short answers.

Is 501 S Mountain 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 501 S Mountain Ave have?

County records list 2 units at 501 S Mountain Ave, classified as duplex across 1,715 square feet of building area, averaging about 858 square feet per unit. Unit counts on the roll can lag permitted conversions and unpermitted additions in both directions.

When was 501 S Mountain Ave built?

The assessor roll gives a build year of 1907, 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 501 S Mountain Ave last change hands?

The most recent transfer on the roll was recorded October 2022. 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 501 S Mountain Ave assessed at, and is that what it is worth?

The current assessed value is $283,941 ($117,726 land, $166,215 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 49 years.

Would the owner of 501 S Mountain Ave face a big tax bill on a sale?

Possibly. A base year going back roughly 49 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 501 S Mountain 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?

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