3832 Mainsail embodies the ease of Southern California lakefront living, pairing extensive renovations with the warmth and refinement of Spanish Modern design. Beyond a private gate with keyless biometric entry, a landscaped walkway welcomes you into interiors framed by vaulted ceilings, beautiful beams, and engineered wood flooring. Lincoln windows and a striking 20-foot-wide sliding doorway draw the eye toward Westlake Lake, creating an effortless connection to the water. The kitchen features custom white oak cabinetry, porcelain countertops, ambient LED backlighting, and an inviting breakfast area. Stone and travertine finishes enrich the bathrooms, while enhanced lighting in the primary bath and custom primary closet adds a thoughtful finishing touch. A downstairs bedroom or office opens to a secluded patio shaded by lush greenery. Upstairs, the primary suite enjoys its own lakeview deck, complemented by two additional bedrooms and a shared dual-vanity bathroom. Outdoors, the two-level backyard unfolds into three distinct spaces for dining, gathering, and quiet moments by the lake. New hardscape, decking, and waterproofing are complemented by new planter walls, fresh sod, mature landscaping, and drip irrigation throughout. A mature redwood provides shade, while low-voltage downlights set the mood for evenings overlooking the water. A resurfaced dock with a boat electrical connection and an epoxy-finished garage complete this beautifully renewed waterfront retreat.