1603 Sea Horse Circle Tucked away in the heart of Eastside Costa Mesa, South of 17th Street, this beautifully updated four-bedroom residence offers the perfect blend of modern style, comfort, and indoor-outdoor living. A dramatic vaulted ceiling, abundant natural light, wide-plank flooring, and a custom fireplace create a warm and inviting atmosphere from the moment you enter. The open-concept living and dining areas flow effortlessly into a thoughtfully updated kitchen featuring rich navy cabinetry, quartz countertops, a farmhouse sink, stainless steel appliances, and designer lighting. Upstairs, four spacious bedrooms provide flexibility for family, guests, or a dedicated home office. The primary suite offers a relaxing retreat with vaulted ceilings, a striking accent wall, and a beautifully appointed bathroom featuring dual sinks and a separate soaking tub. Outside, the private backyard is designed for year-round enjoyment, with low-maintenance landscaping, lush privacy hedges, ambient string lighting, and multiple areas for lounging, dining, and entertaining. Additional highlights include an attached two-car garage, central air conditioning, and a desirable location within a charming four-home community. Just moments from the shops and restaurants of 17th Street, neighborhood parks, and the beaches of Newport Beach, this home offers the best of the Eastside lifestyle with the comfort and convenience of a thoughtfully designed retreat.