Trillium Hollow Cohousing Community

Portland, Oregon, United States

  • Last updated: January 2, 2019 (3 seconds ago)
  • Listing created on: December 31, 1999

Mission Statement

We, the members of Trillium Hollow Cohousing Neighborhood, commit ourselves to the creation and maintenance of a supportive, enriching, and purposeful community that fosters the spiritual connection among ourselves, others, and the earth through simplicity, cooperation and service.

Community Description

We are a suburban cohousing community nested in 4 acres of lush, forested wildlife setting, with a creek and evergreen firs. Trillium Hollow is located minutes from downtown Portland, within walking and biking distance of mass transit, parks, schools (Beaverton school district), shops, and medical facilities.

Our community includes 28 self-sufficient apartments (studios, one-, two-, three-, or four-bedroom units) with one stand-alone unit, all 29 owned as condominiums. Our common facilities including a 3,600-sq-ft Common House with three guest rooms and generous dining/meeting spaces; indoor and outdoor play areas for children; a workshop; hot tub; 24/7 internet; community laundry facilities; native-plant landscaping; and organic community garden.

Our shared community life at Trillium is active: Members gather frequently for meals, work parties, celebrations, and social activities. Our regular celebrations include Winter Solstice, Talent/No Talent Show, Founders’ Day, summer bash and Halloween. We are a caring, supportive, consensus-based community, seeking to live lightly on the land, working cooperatively with our surrounding neighbors, valuing participation in our community, and living simply.

Our vision is to create and live in a community that fosters harmony with each other, the larger community, and nature.

  • Status: Established (At least 4+ adults, 2+ years)
  • Started Planning: 1991
  • Start Living Together: 1998
  • Visitors accepted: Yes
  • Open to new Members: Yes
  • Please read the details in Membership below before contacting this community. Send Message
  • Website address:
  • Contact Name: Trillium Hollow


  • Type(s): Cohousing (individual homes within group owned property)
  • Programs & Activities: Neighborhood, Community Housing, or Homeowner’s Association
  • Location: Suburban


  • Status: We have land we have developed on
  • Area: 4 acres
  • Current Residence Types: Single-family homes
  • Current Number of Residences: 29
  • Housing Provided: Purchase, Rental
  • Land owned by: The entire community membership
  • Additional Comments:

    Backyard wilderness within a suburban area


  • Adult Members: 43
  • Child Members: 12
  • Non-member Residents: 0
  • Percent Women: 51-60%
  • Percent Men: 31-40%
  • Percent Transgender: 0%
  • Visitors accepted: Yes
  • Visitor Process:

    We hold a regular orientation tour on the first Saturday of every month. Please inquire for specific availability.

    Additional tours are scheduled as necessary. Email us at [email protected] for more information.

  • Open to new Members: Yes
  • Membership Process:

    We encourage prospective members to participate in our Path to Neighborhood process to discern if Trillium & cohousing is right for them.


  • Decision Making: Modified Consensus (everyone agrees, with some exceptions or fallbacks.)
  • Identified Leader: No
  • Leadership Core Group: No
  • Additional Comments:

    We are a consensus based community and we work through teams. Each team has a lead person that rotates over time. See our website for a description of our teams, and to see how we manage our maintenance and community building.

    Proposals for community consideration usually come from our work teams and are presented at HOA meetings for consideration by the whole community.


  • Dues, Fees, or Shared Expenses: Yes
  • Shared Income: None
  • Required Labor Contribution per Week: 2
  • Open to members with existing debt: Yes
  • Additional Comments:

    As part of our work share policy members are expected to contribute 6 hours per month for each resident adult to maintenance of the property and participate on one or more teams.

    We are legally a condominium association. Ownership or rental of a unit and payment of monthly HOA dues are the only fees.

    We share the expense of common maintenance, electricity, water, etc. as part of our monthly assessments, as in any condominium association.

Sustainability Practices

  • Energy Infrastructure: We are connected to the grid.
  • Current renewable energy generation: 0%, or close to 0%
  • Current food produced: Up to 25%
  • Planned food produced: Up to 25%
  • Food produced locally: Up to 25%


  • Common Facilities: Common House, Garden(s), Greenhouse(s), Workshop, Hot tub or hot springs, Large Scale Kitchen, Fire pit, Swingsets & play areas, Internet
  • Internet Available: Yes, both the community and individuals provide it
  • Internet Fast?: Yes, it’s fine.
  • Cell Phone Service: Good for most people.
  • Shared meals: About once a week
  • Dietary Practice: Omnivorous (plants and animals), Paleo (no grains, dairy, processed foods, or legumes), Local (food sourced within 150 miles), Organic (no pesticides or synthetic fertilizers), GMO Free (only non-genetically modified organisms), Vegetarian Only (no animal meat; dairy and eggs okay) – Please check this only if you are 100% Vegetarian, Mostly Vegetarian, Vegan Only (plants only, no animal products) – Please check this only if you are 100% Vegan., Mostly Vegan, Opportunivore (dumpster diving, nature harvesting, etc.), Raw or Mostly Raw, Kosher, Halal, Dairy-Free, Gluten-Free
  • Dietary Choice or Restrictions: No – people may eat however they wish.
  • Special Diets OK: Yes
  • Alcohol Use: Yes, used occasionally.
  • Tobacco Use: Yes, used seldomly, or ceremoniously.
  • Additional Diet Comments:

    Our Meal Program is being re-imagined for September through June. Meals are cooked by volunteer teams and anyone can sign up ahead of time to attend. We also have a Community Lunch on work party days and frequent pot luck dinners during the summer.

  • Common Spiritual Practice(s): Ecumenical (accepts all religions or spiritual practices), Eclectic (integrates multiple religious or spiritual beliefs), Not a particularly spiritual or religious community, Christian, Buddhist, Jewish, Protestant, Catholic, Unitarian Universalist, Paganism or Earth Religions, Mixed Eastern Philosophy or Practice, Ananda Community, Atheist, Agnostic, Humanist
  • Education Style(s): Up to each family or individual
  • Healthcare Options: Up to each family or individual

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Community Network or Organization Affiliations



birds, nature, kids, multi-generational, garden, native habitat