Exterior Design
This Accessory Dwelling Unit (ADU) delivers a cozy **578 sq ft** of heated living space in a simple, stylish package. The exterior is marked by clean rooflines and classic cottage charm, perfect for a backyard addition, guest house, or rental. Wide windows bring in natural light, while a covered entry creates a welcoming touch.
The compact footprint makes it adaptable to tight lots, and its streamlined design blends easily with modern, farmhouse, or traditional settings.
Interior Layout
Inside, a vaulted ceiling runs through the living room and kitchen, dramatically increasing the sense of space. This open core makes entertaining or relaxing feel natural, with light and air flowing across the plan.
A thoughtful circulation path means every square foot is maximized—no wasted hallways, just efficient transitions between living, cooking, and resting zones.
Floor Plan:
Bedrooms & Bathrooms
This ADU includes a comfortable bedroom tucked privately at one end of the plan. Ample closet space keeps belongings organized, while a nearby full bathroom is easily accessible to both resident and guests.
The bathroom’s proximity to the living area adds convenience, especially when the space is used for entertaining or hosting overnight visitors.
Living & Dining Spaces
The vaulted living room is the showpiece, transforming this modest plan into something that feels much larger. There’s room for a sofa, small dining setup, and entertainment center—an airy environment for both solo living and company.
Kitchen Features
The kitchen is compact but efficient, designed with modern lifestyles in mind. An L-shaped counter run offers plenty of prep space, while upper cabinets and open shelving maximize storage. Positioned under the vaulted ceiling, it feels open, bright, and welcoming.
Outdoor Living (porch, deck, patio, etc.)
A covered front entry porch expands the livable area outdoors, offering space for a bench, planters, or a pair of chairs. With minimal square footage, this porch becomes an essential everyday retreat.
Garage & Storage
This ADU does not include a garage, keeping the footprint efficient and accessible. Interior closets and smart cabinetry provide sufficient storage, and a detached shed or carport could easily supplement the design if needed.
Bonus/Expansion Rooms
While there are no bonus rooms, the vaulted ceiling invites creativity—such as a lofted sleeping area, storage platform, or decorative beams to add character. The plan’s compact footprint also allows for easy site adaptations, like adding a patio or small deck.
Estimated Building Cost
The estimated cost to build this ADU in the United States ranges between $150,000 – $250,000, depending on location, labor rates, and finishes. Its smaller scale and efficient layout help keep costs manageable while delivering modern comforts.
In summary, this 578 sq ft ADU is a small but mighty design. With its vaulted living room, functional kitchen, cozy bedroom, and inviting porch, it offers a flexible solution for guest housing, rental income, or independent living—all in a smart, stylish package.
