Eric Altree Residential Real Estate

140 Walnut Avenue
Mill Valley

At-a-Glance Facts:
Square Footage
3,500 +/- sq. ft. per architect
Mill Valley

A stunning luxury home awaits in heart of Sycamore Park! Situated on one of the largest lots (10,000 +/- sq. ft.) in what is widely considered Mill Valley’s premier neighborhood; the latest KCS Estates iconic luxury home is a modern take on tradition.This custom built 3,500 +/- sq. ft. (per architect), 5 bedroom, 4.5 bath home embodies the aesthetic of Modern Traditional design, seamlessly blending the elegance of a traditional home w/ clean lines, open floor plan & stylish finishes.

No detail was spared in the creation of this stunning home. The open well thought out floor plan is designed to meet a family’s needs through every stage.Traditional and modern design elements fuse seamlessly to create an aesthetic that refuses to be trendy or become outdated.It is the Modern Traditional.

Co-listing Agent: Melissa Crawford / Pacific Union International, Mill Valley


Get Walkscore for this property

Property Highlights:


  • Virtually new construction impeccably remodeled with the highest attention to detail and finish.
  • Spacious 5 bedroom, 4.5 bath home including attached guest apartment
  • 3,500 +/- sq. ft. (per plans) of living space on flat 10,000 +/- sq. ft. parcel (per tax records).
  • Detached one car garage, plus two car parking court
  • Distributed audio system features multi-room and outdoor zones
  • 2 forced air heating systems provide multi-zoned temperature control. Ready for two air conditioning units
  • Warm wide planked Beach Grass finish Oak floors throughout Great Room
  • Vaulted living room ceiling
  • Two 24” (98 bottle) Thermador Wine Preservation Columns bookend the bar in the dining area
  • French doors open to patio with its outdoor bluestone fireplace
  • Custom designed wood wall paneling and Pietra Fina Statuarietto marble provides dimension and texture to the bar, floor to ceiling fireplace surround, and custom kitchen cabinetry


  • Expansive square island made of Pietra Fina Statuarietto with custom wood paneling detail serves as the perfect hub for cooking and entertaining.
  • Custom painted cabinetry
  • 60” Wolf dual fuel range with char broiler/griddle
  • 42” Sub-Zero refrigerator with custom paneled french doors
  • State of the Art Bosch dishwasher
  • Side entry mud room with pantry storage adjoins kitchen

Master Suite

  • Multi room suite designed for maximum privacy and ultimate flexibility
  • Spacious bedroom features vaulted ceiling and sliding doors that spill out to the backyard and private deck area with built in Hot Springs Spa.
  • Ample closet space ready and waiting for personalization
  • Spacious master bath with his and her vanities and linen closets featuring stunning Walker Zanger Sterling Row linen Tuxedo Chevron tile floor and beautifully complemented by the sleek custom cabinetry, Pietra Fina Statuarietto marble and AKDO Origin White Birch tiles.
  • Oversized shower features AKDO Origin White Birch tiles
  • Soaking tub with Pietra Fina Statuarietto waterfall tub deck
  • Second room in suite perfectly suited for multiple uses: home office, gym nursery, or dressing room
  • Independently controlled temperature zone for maximum comfort

Upper Level

  • Private junior suite with walk in closet
  • 2 additional generously sized bedrooms with shared double vanity bath
  • Lounge area perfect for kids homework or hang out space
  • Laundry room

Outdoor Area

  • Level and expansive ~10,000 square foot lot offers seamless indoor/outdoor living
  • Spacious covered front porch set well back from the street and looking over the landscaped front yard and creek
  • Sunny level lawn area
  • Covered rear loggia with outdoor stone fireplace and sitting area accessed directly from the great room
  • Spacious rear patio ideal for casual outdoor dining and entertaining.
  • Additional outdoor fire pit seating area (an ideal way to spend a summer evening).

One Bedroom Guest Apartment

  • Separate front entry and interior door connection allowing for complete privacy or comfortable extended family visits.
  • Independently controlled temperature zone
  • Kitchen with Organic White Polished Ceaserstone countertops, Wolf cooktop, Fisher & Paykel refrigerator, dishwasher & custom cabinetry
  • Full bath with stall shower in Akdo Bruokku Ash Grey Mosaic and Ash Grey polished accent tiles
  • Bedroom with generous closet.
  • Flexible design allows this space to be used as either guest suite or for an au-pair or incorporated into the main living area as separate play/media room and main level bedroom
Contact Eric Altree:
Direct: 415.345.3049

Contact Eric


Newsletter Sign-Up Form

For in-depth market analysis for San Francisco and Marin County,
please sign up for Eric's newsletter.