4233 Costello Avenue
Sherman Oaks, CA, 91423
$3,499,000
Original list price: $3,599,000
MLS: 26984849
Beds
5
Baths
7
Sq Ft
5,251
Lot
0.16 ac
Year Built
2018
MLS #
26984849
Days on Market
42
Listed
Sep 8, 2026
Description
Located on a premier residential street in the heart of Sherman Oaks, 4233 Costello Avenue is a masterfully designed modern residence that seamlessly pairs high-end privacy with an enviable, walkable lifestyle. Set behind imposing security gates and just steps from the area's premier restaurants, boutiques, and fitness studios, this 5-bedroom, 7-bathroom (5 full and 2 half) multi-level residence offers over 5,200 square feet of uncompromisingly luxurious living space. Beyond the architectural solid-wood pivot door, a light-filled formal living and dining area - defined by soaring ceilings, walls of glass, a custom glass wine enclosure, and the sculptural silhouette of a floating staircase-creates an exquisite atmosphere for sophisticated entertaining. Completing the front of the residence, a custom-tiled guest powder bath and a versatile main-floor en-suite bedroom - currently tailored as an office - feature a full bath and a private deck overlooking mature magnolia trees. At the rear of the home, an expansive kitchen and family great room center around a custom fireplace, an integrated surround sound system with an in-wall subwoofer, and Fleetwood glass sliders that open directly to the yard. The kitchen is curated for both function and scale, featuring a rare double island, a large walk-in pantry, extensive premium cabinetry, and a dramatic book-matched quartz accent above the stove. Complete with an elegant breakfast area, this space delivers a sense of volume and refined quality typically found in much higher-priced estates. Serving as the 1st of the home's 3 distinct levels, the lower level adds exceptional versatility, featuring a 2-car garage equipped with an EV charging station (complemented by 2 additional spaces in the driveway) finished with black epoxy floors and custom built-ins for showcasing your autos, along with a convenient half bath and a dedicated home theater. Climate-controlled by 2 HVAC systems that separate the top floor from the lower 2 levels, the upstairs features a wide, airy hallway connecting a laundry room to 4 independent en-suite bedrooms. Each suite features large picture windows with automated Shade Store shades and spa-like bathrooms with custom tilework and floating vanities. The primary suite serves as a secluded sanctuary, complete with high ceilings, a luxurious dual-sided fireplace shared between the bedroom and bath, a large walk-in closet, and an opulent porcelain bathroom featuring a soaking tub and an oversized frameless glass shower. Directly off the primary bedroom is one of the property's most distinctive features: a nearly 800-square-foot private, turfed terrace (not included in the official square footage), which is the perfect setting for a personal wellness retreat, with ample room for a sauna, cold plunge, and lounging area. From here, a private exterior staircase leads to the resort-caliber backyard, which includes a zero-edge infinity pool with a sun deck, and a manicured play area with a built-in BBQ. Designed for modern convenience, the entire estate operates as a fully integrated smart home, offering seamless WiFi control over the Nest thermostats, Ring and DVR home camera systems, Lutron lighting, pool, sprinklers, and localized Sonos speakers. Offering exceptional scale, bespoke amenities, and a coveted location, 4233 Costello Avenue stands out as a preeminent opportunity for luxury living in Sherman Oaks.
Location
Sherman Oaks, Los Angeles County, CA 91423
Open on Google Maps ↗Listed by: Alan Taylor · Compass
Listing information is provided courtesy of the Greater Antelope Valley Association of Realtors (GAVAR) and California Regional MLS (CRMLS). Information is deemed reliable but not guaranteed accurate by the MLS or by Mike Watson. All data, including square footage, lot size, room count, permits, and school assignment, should be independently verified. Properties shown may be listed by brokerages other than Keller Williams Realty. Listings are subject to prior sale, change, or withdrawal without notice.
Payment estimate
$27,061
/ month (est.)
Principal, interest, taxes, and insurance + PMI. Down payment: $349,900 · Loan: $3,149,100
Average 30-yr fixed rate 7.40% as of Oct 15, 2026 (Freddie Mac PMMS). Adjust to your quote.
- Principal & Interest
- $21,804
- Property tax (1.25%)
- $3,645
- Homeowners insurance
- $300
- Mortgage insurance
- $1,312
Login required. The full tool supports FHA / VA / USDA, PMI by credit tier, lender fees, and total cash to close — with your inputs here carried over.
Today's Rates
As of Oct 15, 2026
- 30-year fixed
- 7.40%
- 15-year fixed
- 6.71%
Source: Freddie Mac Primary Mortgage Market Survey (PMMS). Updated weekly.
About the area · Mike Watson
About the Antelope Valley
The Antelope Valley spans Lancaster, Palmdale, Quartz Hill, Rosamond, Lake Los Angeles, California City, Edwards AFB, and the Plant 42 aerospace corridor. Mike Watson is a lifelong AV resident and the #1 producing individual Realtor in the region by transaction count. Every active listing on this site is paired with a free market analysis tailored to the specific street, honest financing guidance (FHA, VA, USDA, CalHFA, conventional, and assumable loans where the financing supports it), and side-by-side comparisons against the rest of the active inventory in your target ZIP.
Financing Options
FHA Financing — 3.5% Down＋
First-time and repeat buyers can purchase this Sherman Oaks home with as little as 3.5% down using an FHA loan — roughly $122,465 down. FHA loans feature flexible credit guidelines and government-backed rates, making homeownership accessible for buyers who haven't saved a large down payment. Seller concessions up to 6% of the purchase price are also allowed.
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