In a large mixing bowl, combine the avocado oil, fresh lemon juice, lemon zest, minced garlic, chopped parsley, dried oregano, dried thyme, and sea salt. Whisk the ingredients together until well blended.
Add the chicken thighs to the marinade, ensuring that each piece is generously coated. Cover the bowl with plastic wrap or transfer the chicken and marinade to a resealable plastic bag. Let it marinate in the refrigerator for at least 1 hour, or preferably overnight for maximum flavor.
When you're ready to cook, preheat your oven to 425°F (220°C). This high temperature will help to crisp up the skin while keeping the chicken moist and tender.
Remove the chicken from the marinade, allowing any excess liquid to drip off. Place the chicken thighs skin-side up in a roasting pan or baking dish. You can pour a little of the marinade over the top for extra flavor, but don't overcrowd the pan.
Roast the chicken in the preheated oven for about 35-45 minutes, or until the internal temperature reaches 165°F (75°C) and the skin is golden brown and crispy. For an extra crispy skin, you can broil the chicken for the last 2-3 minutes, but keep a close eye on it to prevent burning.
Once cooked, remove the chicken from the oven and let it rest for about 5-10 minutes. This allows the juices to redistribute, ensuring every bite is juicy and flavorful.