Converting your Marin County home to a long-term rental makes financial sense in 2026 if your rental income can cover or come close to your monthly housing costs (PITI), you’re planning to be away for at least two to three years, and the property is in move-in-ready condition. The Marin rental market remains strong — based on Foundation Homes’ closed lease data and MLS transactions from 2022–2026, 3-bedroom single-family rents range from $3,500/month in San Rafael to over $10,000/month in Belvedere and Ross. The decision gets more complicated if you’re planning to sell within five years, have a low-basis home, or are emotionally attached to the property. The honest answer: run the numbers first, and don’t make the decision based on what the market feels like.