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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/10140 MOUNTAIR AVE
/// BUILDING FILE · ROLL 2025

10140 MOUNTAIR AVE.

Los Angeles, CA 91042 · APN 2558-022-061

/// 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

26

BUILDING SF

18,218

SF / UNIT

701

YEAR BUILT

1985

BEDROOMS

—

BATHROOMS

—

USE · CODE 0500

5+ UNITS

/// ASSESSED VALUE
LAND$1,281,174
IMPROVEMENTS$1,889,733
TOTAL$3,170,907
LAND BASE YEAR2011
OWNERSHIP TENUREAPPROX. 15 YEARS

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

/// LAST TRANSFER
RECORDEDAPR 14, 2011

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 91042

Recent sales nearby.

ADDRESSSOLDEST. PRICEEST. $/UNITUNITS
10253 COMMERCE AVE→DEC 2024EST.$418,861$209,430UNITS27064 GREELEY ST→DEC 2024EST.$4,050,000$450,000UNITS910030 PINEWOOD AVE→DEC 2024EST.$1,050,000$350,000UNITS310155 SILVERTON AVE→DEC 2024EST.$2,700,000$192,857UNITS1410207 HELENDALE AVE→NOV 2024EST.$745,000$372,500UNITS27727 APPERSON ST→OCT 2024EST.$740,000$370,000UNITS27137 GREELEY ST→OCT 2024EST.$2,600,000$325,000UNITS87636 DAY ST→OCT 2024EST.$720,000$360,000UNITS2

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

/// COMPARE

Buildings like this one.

ON MOUNTAIR AVE · ZIP 91042

10050 MOUNTAIR AVE→39 UNITS · BUILT 1964 · 5+ UNITS10062 MOUNTAIR AVE→3 UNITS · BUILT 1947 · TRIPLEX10063 MOUNTAIR AVE→8 UNITS · BUILT 1987 · 5+ UNITS10069 MOUNTAIR AVE→2 UNITS · BUILT 1948 · DUPLEX10109 MOUNTAIR AVE→4 UNITS · BUILT 1962 · FOURPLEX10118 MOUNTAIR AVE→9 UNITS · BUILT 1947 · 5+ UNITS

SIMILAR SIZE AND ERA IN 91042

10037 SAMOA AVE→18 UNITS · BUILT 1986 · 9,448 SF10042 COMMERCE AVE→32 UNITS · BUILT 1983 · 14,800 SF10051 PINEWOOD AVE→27 UNITS · BUILT 1988 · 24,769 SF10059 PINEWOOD AVE→24 UNITS · BUILT 1972 · 21,096 SF10059 TUJUNGA CANYON BLVD→17 UNITS · BUILT 1984 · 8,254 SF10075 TUJUNGA CANYON BLVD→40 UNITS · BUILT 1984 · 20,220 SF
EVERY BUILDING IN 91042 →
/// COMMON QUESTIONS · 10140 MOUNTAIR AVE

The short answers.

Is 10140 Mountair 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 10140 Mountair Ave have?

County records list 26 units at 10140 Mountair Ave, classified as 5+ units across 18,218 square feet of building area, averaging about 701 square feet per unit. Unit counts on the roll can lag permitted conversions and unpermitted additions in both directions.

When was 10140 Mountair Ave built?

The assessor roll gives a build year of 1985, which is after the October 1978 RSO cutoff. Age drives more than character here: it sets rent-cap exposure, seismic retrofit obligations, and what a lender will underwrite.

When did 10140 Mountair Ave last change hands?

The most recent transfer on the roll was recorded April 2011. 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 10140 Mountair Ave assessed at, and is that what it is worth?

The current assessed value is $3,170,907 ($1,281,174 land, $1,889,733 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 15 years.

Would the owner of 10140 Mountair Ave face a big tax bill on a sale?

Possibly. A base year going back roughly 15 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 10140 Mountair 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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