For sale Home

Listed Sep 8, 2026

$3,750,000 Est. $24,803/mo

12639 Promontory Road

  • 4

    Beds

  • 5

    Baths

  • 5,023

    Sq ft

The story

  • Pool

Over 5,000 square feet of grand-scale living with 24-hour guard gated security in the picturesque Mountaingate community of Brentwood. An extraordinary combination of space, security, privacy and resort-style living, this 4BR, 4.50BA home is one of the most ideal retreats in LA! Soaring ceilings, dramatic architectural volume, tall doors, oversized windows and sweeping open views create light-filled interiors with an impressive sense of scale from the moment you enter. The main level features expansive living and dining rooms, a comfortable family room, and spacious kitchen with breakfast area. Upstairs, a library provides an ideal setting for a home office, study or relaxed den for family members to enjoy. The generous primary suite features a veranda, fireplace, high ceilings and large bath with dual amenities and two walk-in closets. BR's 2,3 and 4 are all ensuite and offer full privacy on their own wings. Hardwood floors throughout much of the residence, three fireplaces and a three-car garage complete the interior. Outside, a low-maintenance backyard creates its own resort-like setting with BBQ, entertainers patios, a refreshing pool and an exceptionally large spa with ample room for exercise or simply relaxing outdoors. Ready to enjoy today with minor remodeling while offering an exceptional opportunity to personalize over time. For more than two decades, this was the longtime home of NBA veteran and trailblazer Jason Collins, a groundbreaking figure whose influence and legacy extended far beyond the basketball court. Mountaingate offers a unique park-like environment with 24-hour guard-gated security and hourly manned patrols, beautifully maintained common-area landscaping, trash-can services, community pool and spa, alarm monitoring and other community services. Enjoy the breathtaking Santa Monica conservatory mountains with its glorious hiking trails and stunning natural terrain. Plus, great schools - Roscomare, Paul Revere and Palisades High. Optional membership at Mountaingate Country Club offers golf, tennis and social memberships with restaurant and gym/fitness facilities. Conveniently located near the Getty, UCLA , USC and the best dining and shopping of Brentwood and the Westside. Offered at approximately $747 per square foot, this is an exceptional opportunity to own more than 5,000 square feet in Brentwood and a remarkable combination of scale, security, privacy and value. TRUST SALE, As Is condition, no court confirmation needed. Please use Trust Advisory with offer.

Facts & features

Home type

Home

Year built

1989

Floors

2

Lot size

6 acres

Price per sq ft

$747

HOA

$1,421 / monthly

Parking

3-car garage

Included features

  • Pool

    Yes

  • Fireplace

    Yes

  • Cooling

    Central Air

  • Heating

    Central, Forced Air

  • Appliances

    Dishwasher, Disposal, Refrigerator, Dryer, Washer

  • Flooring

    Carpet, Wood

  • View

    Mountain

Mortgage calculator

Estimated monthly payment

$24,803 /mo

7% rate · 30-yr fixed · 20% down

  • Principal & interest $19,959
  • Property tax $3,750
  • Insurance $1,094

Includes principal, interest, taxes & insurance.

Your Property Journey

Interested in this, or something like it?

Submit an inquiry

Drop your details and we will help you find what you are looking for.

Not quite. Help me find the right one

Talk it through or type it out, whichever feels easiest.

Your contact details

An agent will reach out personally, no automated calls.

Smart Assistant

Hi, how can I help you find your dream home?

Tap the voice button to talk, or just start typing.

Tap anywhere to fix a word or add more

Tap stop when you’re done. You can edit the text before searching.

By submitting, you agree to our Privacy Policy and Terms.

Listing Broker

Coldwell Banker Realty

Broker Name

Coldwell Banker Realty

Agent

Tania Ferris

Location

Beverly Hills CA 90210