Portland Permaculture Retrofit: 2025 Resilience Project Results
TL;DR: An urban permaculture retrofit in Portland achieved significant self-sufficiency in food, energy, and waste management on a small lot.
- Urban permaculture can achieve 70% food self-sufficiency.
- Stacked functions optimize small spaces for diverse yields.
- Integrated systems reduce water use by 50% and energy by 30%.
- Initial investment of $8,000 yields $1,500 annual savings.
- Designs offer resilience for up to six months without external inputs.
Why it matters: This case study demonstrates a practical and replicable model for urban dwellers seeking greater autonomy and resilience in the face of supply chain disruptions.
Do this next: Assess your household’s organic waste stream and explore options for composting or vermicomposting to reduce landfill contributions and generate soil fertility.
Recommended for: Urban dwellers seeking to implement tangible permaculture solutions for food, energy, and waste on a small, residential scale.
This Resilience.org case study documents a permaculture retrofit on a 0.1-acre urban lot in Portland, achieving 70% produce self-sufficiency through stacked functions for energy, food, and waste. Design applies ethics (earth care, people care, fair share) via zoned layouts: Zone 1 stacked greenhouse with aquaponics (tilapia + greens yielding 200kg/year), greywater from sinks irrigating fruit trees. Waste systems include compost tumblers processing 90% household organics, feeding worm bins for liquid fertilizer. Resilience to disruptions shown by 6-month no-input survival, with solar pumps and rainwater tanks (5,000L capacity). Cost breakdowns: $8,000 total ($2k earthworks, $3k plants/systems), ROI via $1,500 annual savings. Scalable designs include stacked functions like trellised berries shading cool storage, chicken tractors fertilizing guilds (currants, kale, nasturtiums). Metrics: water use down 50% via reed-bed filtration specs (flow rates, media layers), energy offset 30% from passive solar. Lessons cover urban challenges like shade/neighbor dynamics, solved by vertical guilds and community shares. Blueprints, material lists, and phased implementation (Month 1: water; Month 3: soil; Month 6: animals) provide replicable steps for city dwellers building autonomy amid supply chain risks.