If you've been looking for a 4-bedroom, 3 full bath home PLUS a spacious BONUS ROOM for your office or creative space, look no further than 27426 Sereno in the heart of Mission Viejo. With only one HOA the entire family will enjoy this premier corner lot home, expanded from its original layout. A vinyl picket fence, soothing water feature, and lush landscaping create a warm and inviting first impression. Inside, natural light fills the living space, highlighted by a cozy gas fireplace, front-facing windows, unique tile flooring with wood-like inlay, and an open niche perfect for media or decor. The main level offers three bedrooms, including a spacious primary suite with wainscoting, recessed lighting, ceiling fan, and a double-pane sliding glass door with direct backyard access. It also features a large walk-in closet, an additional closet for everyday essentials, and a private bath. Two secondary bedrooms share a full bath with a jetted tub and ample linen storage. The kitchen features ample cabinetry, stainless steel appliances, and a peninsula with optional bar seating that opens to the dining area. A built-in storage cabinet in the dining area keeps everyday essentials neatly tucked away. Two sliding glass doors provide seamless access to the side and backyard, creating a natural indoor-outdoor flow that's perfect for entertaining. Upstairs, a light-filled staircase with rich wood laminate flooring, high ceilings, and multiple windows. Here you'll find an additional bedroom with a closet, a full bath with jetted tub, and an expansive BONUS ROOM filled with natural light, a stone gas fireplace and remote-controlled shades--perfect as a virtual home office or an extra bedroom for extended family or guests. The upper level also includes convenient built-in storage ideal for keeping linens and household essentials neatly organized. The backyard is designed for year-round enjoyment with a gazebo, fire pit, and TV, along with the best lemon and orange trees, your own herbs - sage and rosemary with plenty of grassy play areas, vinyl fencing, and a raised seating area with custom pavers. This home also offers added accessibility with two ramps--one in the garage providing access into the living area, and another in the backyard. Additional features include a tankless water heater, attached two-car direct-access garage, and access to Lake Mission Viejo with so many fun amenities. A home that offers space, flexibility, and comfort in a beautiful setting.