At Petra MJ Designs, we create timeless interior and landscape environments for homes in Sonoma Valley and beyond. Our studio offers a seamless blend of interior design, outdoor living design, 3D renderings, and custom plan development—bringing clarity and cohesion to every phase of the process.
From thoughtfully curated kitchen remodels to beautifully integrated gardens and outdoor spaces, we help clients envision the full potential of their home and bring their project to life with confidence, ease, and lasting elegance.
Our Story
Petra MJ Designs began in New England, where founder Petra Longley earned her degree in interior design and worked in historical preservation. During one project, she felt a pull back to her first love—the garden and natural world—which sparked a new path in landscape design and horticulture.
What started as a landscape maintenance company has since grown into a full-service design studio. Today, Petra brings her passion for both interiors and outdoor spaces together, creating timeless, harmonious environments that beautifully connect home and nature.
