This sleek, modern ADU (Accessory Dwelling Unit) showcases about 644 sq ft of smartly designed living space, tailored for comfort, efficiency, and style. With 2 bedrooms, 1 full bathroom, and an inviting open-concept living, dining, and kitchen area crowned with a dramatic vaulted ceiling, this plan feels much larger than its footprint suggests. It’s a perfect fit as a guest house, backyard rental, vacation retreat, or compact primary home that doesn’t compromise on light, flow, or architectural presence. 0
Exterior & Curb Appeal – Modern Style with Clean Lines
The exterior embraces a crisp, contemporary aesthetic with sleek horizontal siding, bold black-framed windows, and a simple single-slope roof that evokes modern design sensibilities without feeling cold. This combination creates a clean, striking profile that works beautifully on small infill lots, scenic landscapes, or as an elegant backyard addition. 1 Big expanses of glass draw the eye and provide a visual connection between inside and out, while the compact form keeps the design grounded and approachable. 2
Open Concept Living – Vaulted Great Room & Natural Light
Upon entry, you’re welcomed into an open-concept space where the living room, dining area, and kitchen flow seamlessly together. A dramatic vaulted ceiling in the great room—rising to about 10 feet—gives the interior a spacious, airy feel that enhances everyday living and social interaction. 3 Large sliding glass doors and windows flood the space with natural light, blurring the boundary between indoor comfort and outdoor surroundings. 4 Whether you’re relaxing on the couch, hosting a dinner, or enjoying a quiet evening, the openness elevates the sense of space and connection. 5
Kitchen – Functional & Streamlined
The kitchen is integrated into the open-plan living space with a layout that supports both daily use and entertaining. Clean lines, efficient work zones, and proximity to the dining area make meal preparation easy and social. 6 Thoughtful design ensures that even in a compact footprint, the kitchen feels functional and connected to the heart of the home. 7
Bedrooms – Comfortably Clustered & Private
This ADU includes two well-sized bedrooms that are positioned thoughtfully for privacy and comfortable access. The bedrooms are clustered together on one side of the plan, making them convenient for everyday use while still feeling separate from the main living area. 8 Vaulted ceilings in the bedrooms, set around 8 feet high, add to the sense of openness and warmth, so even smaller rooms feel generous. 9
Bathroom – Single Full Bath Designed for Ease
Serving the two bedroom spaces and everyday needs is a full bathroom that balances comfort and practicality. Its positioning keeps routines smooth, and the layout supports both residents and guests with ease. 10 In a compact home, efficient planning like this makes living feel seamless and stress-free. 11
Indoor-Outdoor Connection – Small Patio Extension
Large sliding glass doors open to a small patio space that serves as an outdoor extension of the living area. Whether you’re enjoying your morning coffee, stepping outside for fresh air, or creating a mini outdoor lounge, this connection enhances how the home feels and functions. 12 Making outdoor space part of everyday living elevates the comfort of this ADU beyond its compact size. 13
Efficient Laundry – Main Level Convenience
A washer and dryer located on the main level add everyday convenience, making laundry chores simple and unobtrusive. This practical detail supports efficient living without sacrificing square footage in the core living zones. 14
Foundation & Construction – Simple & Solid
The plan is designed on a slab foundation with standard 2×6 exterior walls, giving the home structural strength and excellent insulation potential. Its modest dimensions—about **31′ 0″ wide × 24′ 6″ deep** with a **max ridge height of 11′ 10″**—keep the build efficient while still providing comfortable headroom and volume. 15 With ceilings ranging from 8′ in the bedrooms to 10′ in the vaulted great room, the design balances cozy and open atmospheres elegantly. 16
Specs Summary
- Living Area: ~644 sq ft 17
- Bedrooms: 2 18
- Bathrooms: 1 full 19
- Stories: 1 20
- Foundation: Slab 21
- Exterior Walls: 2×6 22
- Dimensions: ~31′ wide × ~24′ deep 23
- Style: Modern ADU 24
Lifestyle Highlights
- An open-concept living area with vaulted ceilings enhances comfort and light.
- Two quiet, private bedrooms clustered for convenience and ease.
- Natural light and sliding glass doors create a strong indoor-outdoor connection.
- Smart layout makes everyday living feel easy, efficient, and welcoming.
- Main level laundry adds a practical touch often missed in compact designs.
Estimated U.S. Build Cost (USD)
Assuming mid-quality finishes and typical U.S. construction costs around $180–$275 per sq ft, building ~644 sq ft suggests a rough estimated range of $116,000–$177,000 USD, excluding land, permits, site preparation, utility connections, and regional cost variations. 25
Why This Modern ADU Plan Appeals
Compact, stylish, and smartly planned, this modern ADU plan proves that great design doesn’t need a large footprint. The open vaulted living area makes the home feel spacious, while careful bedroom placement preserves privacy. With thoughtful features like main level laundry and seamless indoor-outdoor flow, it’s an ideal option for a backyard guest house, rental unit, or primary dwelling where efficiency and style go hand-in-hand.
