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Sarah Kowalczyk & Lotte Moore present:

Industrial Modern Nature Sanctuary


About this home's










Idyllically situated on a quiet hillside street just above walk-to-town downtown San Anselmo, this stunning industrial-style modern home with 4 bedrooms and 3 baths, provides an unexpected and astoundingly unique living experience, on a quarter acre-lot surrounded by redwood trees, in a residence intentionally designed to integrate with nature.

Outfitted with striking corrugated metal contrasted against redwood and cedar siding, the 2,052 square foot residence is the result of a meticulous head-to-toe remodel in 2012-13 by the owners, who expanded and transformed the home from a 1958 summer cottage, into a one-of-a-kind, contemporary, magical, light-filled architectural gem.

With numerous highly inventive and appealing features, the house includes a contemporary open great room that combines living, dining and kitchen areas and features exposed steel frame beams and ten skylights overhead, adjacent a state-of-the-art media lounge and a uniquely designed primary suite with 14-foot ceilings and clerestory windows on four sides.

In addition to reinventing the house, the renovation included reimaging the outdoor environment, with the goal of habitat restoration and creating a natural oasis at the urban wildlife interface. The landscape now includes a grove of redwood trees, planted 15 years ago, and a system of retaining walls. The distinctive property, which also boasts an intermittent creek, has the added distinction of receiving a lot line adjustment and is poised for permitted expansion to allow for 1,000 additional square feet of prime living space.

House Flow:

Arrive at the property to a visually arresting contemporary street-facing façade, including corrugated steel siding and a modern garage door featuring panes of tempered glass. Head up a poured concrete stairway flanked by gorgeous greenery to reach the front door. Here step into an entrance/mud room. This former porch, now enclosed, is surrounded by windows on all sides and provides a transitional space between the exterior space and interior residence.

From the mudroom enter the great room, through a wall of light filtering interior windows.

With open living, kitchen and dining room spaces, this custom-designed great room reimagines a traditional living space, in favor of exposed load bearing support beams, and multiple natural light sources connecting the outside to the inside.

The open space includes a living room on one side under a series of clerestory windows. On the opposite wall find an industrial-style kitchen boasting “chalk-board black” phenolic resin kitchen counters, and stainless-steel appliances, including Jenn Air gas range, and Bosch dishwasher. A dining area, adjacent the kitchen, includes modern drum light fixture overhead, and sits under a wall of windows, offering pristine nature views of maple and redwood trees.

Adjacent to the dining space, under an exposed wooden arch, step into a sumptuous and plush media lounge room. Fully wired for sound and designed for a film projector, the room is surrounded by mood enhancing curtains, and offers an enhanced setting for entertainment and relaxation.

Bedroom Retreats with Views of the Natural World

A hallway to the right of the great room provides access to two separate bedroom retreats with a modern guest bathroom. The first bedroom on the right faces the street and includes a large, outfitted closet and a private contemporary balcony overlooking the street. The adjacent bath is outfitted with a modern sink over vanity, and shower over tub, surrounded by glow in the dark tiles. A second bedroom on the left offers fully outfitted closet, with large skylights overhead.

Step to the rear of the house to enter a custom-designed and luxurious primary suite. With soaring fourteen-foot open beam ceilings, and a private redwood deck under the trees, this spectacular retreat benefits from light streaming in from five directions, including multiple skylights and windows.

A creatively designed en-suite bathroom sits within the square bedroom space and is surrounded by interior clerestory windows. Outfitted with radiant floors, as well as black phenolic resin counters over modern vanity, the bathroom includes a glass enclosed, deep, two person Japanese soaking tub, situated under a “moonlit” skylight.

This spacious bedroom suite has an adaptive floorplan, with heavy gauge galvanized metal room dividers, hanging from a steel beam, that slide to partition off a portion of the room to create a private workspace. In the corner of the bedroom a pocket door opens directly to the media room for easy access.

 Divine and blissful outdoor nature spaces:

Head outside to explore this incredible quarter acre lot where nearly every inch has been developed to heighten the experience of outdoor living alongside glorious nature. 

Wander the property to find a landscaped seating area to the left of entrance, a beautiful spot for soaking in the morning sun surrounded by nature in a sheltered environment. There are myriad paths to explore throughout the property, including a short cut to Bald Hill preserve, or an intermittent creek surrounded by blossoming plant life.

Walk down to the street level to find a scrupulously maintained garage, with abundant built-in shelving for storage. The garage is adjacent an additional bedroom suite with separate entrance and full bath attached, and a deep walk-in storage closet. From here walk to charming downtown San Anselmo in minutes, top elementary schools, or explore an endless amount of open space and wildlife for hiking, biking, and nature gazing.

Additional Features and Highlights:

  • 2,056 sq ft of living space on 10,800 sq ft lot; (with lot line allowing for expansion to 1,000 sq ft of additional living space)
  • 2013 head-to-toe remodel included upgrading entire infrastructure of house, adding retaining walls, strengthening foundation, replacing windows, and upgrading systems throughout
  • Open floor plan, great for entertaining w/ multiple outdoor entertaining spaces
  • Engineered wood plank flooring, throughout
  • Solar Tubes, throughout hallways & interior spaces.
  • Modern top-down bottom-up shades, entrance/mudroom & great room.
  • Overhead fans, great room & bedrooms
  • Custom-built modern closet adjacent to bathroom, primary suite
  • Soaking tub easily converts to stand up shower, primary suite.
  • Hallway closets w/ stackable Whirlpool Duet washer & dryer, coat closet and media closet for whole house speakers.
  • Multiple skylights throughout allow residents to follow the moon through the house as it travels through the night sky.


  • Forced air heat, and mini splits with A/C and heat, throughout
  • Air filtration system, throughout
  • Whole house stereo system
  • Eco-friendly central house vacuum system
  • On demand water heater


  • Board and batten exterior cedar siding built with reclaimed wood from original house
  • Hardy Plank exterior siding, corrugated metal siding
  • Fire resistant exterior
  • Northgate Garage door with aluminum and opaque glass
  • Landscaping improvements included full habitat restoration; the removal of non-native scotch broom and poison oak, in favor of redwood trees, maple, bay, alders, Ceanothus and red twig dogwood, and the creating safe passage for wildlife and bird populations.


Repairs and Upgrades


  • Retrofitted the foundation
  • Added French Drains
  • Upgraded water main
  • Upgraded electrical panel and electrical wiring
  • Upgraded Furnace
  • Added hardwired fire sprinklers and hardwired smoke detectors
  • Added central vacuum
  • Added (2) On-Demand water heaters – house and kitchen
  • Replaced/Upgraded/Added All new windows/doors
  • Added many skylights and skytubes
  • Replaced/Upgraded garage door and included electric opener
  • Replaced/Upgraded flooring in entire house
  • Added hardwired high-end sound system in Master, Living and Theater
  • Added a “movie theater” which includes Big Screen, Projector & Surround Sound
  • Added HVAC system
  • Upgraded/Added fencing around property boundary
  • Replaced roof
  • Repoured all concrete
  • Added numerous wooden retaining walls
  • Added wooden decking behind Master Bedroom
  • Added an extensive drip irrigation system
  • Enclosed/Reinforced/Raised the roof of the front porch
  • Added recessed lights
  • Added storage locker under porch
  • Added window treatments to porch and living room
  • Added 6 steel I- beams
  • Upgraded shower sinks, toilet in downstairs room
  • Added recessed lights to downstairs room
  • Upgraded shower, sink, tub, toilet in hallway bathroom
  • Added glow in the dark grout to hallway bathroom
  • Expanded Master bedroom
  • Added sliding glass doors to front bedroom
  • Raised ceilings in Master bedroom and movie room
  • Upgraded Master bathroom: tile, sink, toilet, double shower heads, heated floor, sunken tub and counter top
  • Upgraded exterior siding to hard panel and corrugated metal
  • Upgraded and replaced kitchen cabinets and countertops
  • Upgraded and replaced all kitchen appliances, sinks and fixtures
  • Upgraded and replaced plumbing: pipes and fixtures
  • Major landscaping- including at least 40 redwood trees
  • Annexed a piece of land behind property

get in touch


By Appointment:
Contact Sarah Kowalczyk
(415) 464-7484
[email protected]

Contact Lotte Moore
(415) 412-7471
[email protected]

Sarah Kowalczyk



DRE# 01742287

415.464.7484 mobile


Lotte Moore



DRE# 01744042

(415) 412-7471 office


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Neighborhood Gallery

20 Idalia Road

Great weather, access to hiking and biking trails, good schools, and a strong, vibrant downtown make San Anselmo a desirable destination for Marin County homebuyers looking to live a little off the beaten track.

The neighborhood surrounding the San Francisco Theological Seminary is a quiet, leafy enclave of large, older houses with well-tended yards. Heading up Butterfield Road will take you to the rolling hills above San Anselmo and sweeping views of the open spaces, grasslands, and oak trees of northern Marin County. Downtown, locals get their fill of delicious food at MH Bread and Butter or Cucina and and shop for clothing, gifts and accessories in many of the downtown boutiques.

San Anselmo is a town made for strolling. Small shops and many restaurants line the main street, which backs onto the active San Anselmo Creek.