Set within terraced gardens and a magical redwood forest, 39 Renz was originally built in 1912 and has been meticulously updated for modern comfort and convenience. This charming 3-bedroom, 3.5-bathroom craftsman features an updated kitchen with marble countertops and Viking and Miele appliances, a classic fireplace, built-in cabinetry, and a formal dining room with timeless period details. The .5-acre, street-to-street lot boasts a Dwell-worthy detached treehouse retreat designed by renowned Bay Area artist Jay Nelson. The home includes a garage, a storage shed, multiple storage areas, a backup power system, new HVAC with a Mitsubishi mini-split, and an EV charger. This property offers a rare combination: complete privacy nestled within coastal redwoods, yet effortless access to downtown Mill Valley via your own private hillside path. A dedicated shed at the bottom of your path holds bikes, strollers and all your gear, with easy access to ample parking and your choice of flat, scenic walks: head left for Cascade Waterfall or right for Mill Valley Library, Old Mill School, and the villageboth destinations are just a short stroll away. Whether you're heading into town or staying home in your forest retreat, you're surrounded by natural beauty at every turn. The terraced woodland gardens embrace the house with color and texture. Flowers, ferns, shrubs, and trees grace the yard alongside a dedicated herb garden, artificial turf play areas, and multiple patios and decks. And if that is not enough, professional plans for the garden to be reimagined by the amazing SF landscape design firm, TALC Studio, have been prepared and are included with the sale. Outside the backdoor, the incredible treehouse retreat with built-in desk area and loft is suspended on the trunk of a coastal redwood. Designed by Bay Area artist Jay Nelson (featured in Dwell and Sunset magazines), this isn't just a backyard structureit's a work of art and a functional creative space. Whether working, playing, or simply relaxing, you'll love this gorgeous elevated sanctuary. Research shows that immersing yourself in nature has many benefits, but nowhere else can you forest bathe with such style! Multiple options exist for indoor-outdoor entertaining and play. Built-in cabinetry, cozy seating, and period details provide hard-to-find character and charm. A darling nook off one bedroom offers flexible space for play, office or storage. Tam views, outdoor adventure, it's all here--just move in!