4 Beds 3 Baths Twin Barndominium with ADU
Two barns, one brilliant idea. The Twin is a modern barndominium house plan with a twist: a main residence and a separate ADU (accessory dwelling unit) joined by a screen porch — so you get four bedrooms, room for extended family, and a built-in option for rental income, all wrapped in one striking black barn-style design.
Every square foot is designed to be functional while pulling in the beauty of the landscape. The sleek black siding and roof contrast beautifully with light wood accents, and the simple, conventional wood-framed forms keep construction straightforward and budget-friendly — standard door and window sizes mean you can source materials locally.
Inside, the living and dining areas open up under high vaulted cathedral ceilings, with large double-height windows framing the view and a sliding door to the deck. The L-shaped kitchen has a center island and a proper pantry, plus a ground-floor powder room, a coat closet, and clever under-stair storage. There's even a dedicated dog-washing station in the laundry/mudroom, and a master suite with a walk-in closet and a bathroom with a separate wet room for the shower and tub.
Upstairs you'll find two more bedrooms with generous closets, two home offices built for the work-from-home era, a play area, and a bathroom. The flexible play space can be enclosed as a game room — or finished to make this a true four-bedroom house.
A 164 sqft screen porch connects the two structures and extends the living space outdoors — perfect for entertaining or dinner parties, with protection from mosquitoes and rain on those beautiful summer days.
The standout feature is the attached ADU. It packs a multi-functional room (a bedroom with space for a work desk), a kitchenette, a bath, and a cozy loft bedroom — ideal for aging parents, adult kids, guests, or rental income. A separate workshop and storage area with a French garage door rounds it out. Both ADU spaces are independent of the main house and accessed from outside, making this one of the most practical multigenerational house plans and ADU house plans around.
Whether you're building a forever family home or an income-generating property, the Twin is a versatile, eco-friendly barn house plan that adapts to how you actually live.
Multigenerational families, work-from-home households, hosts, and investors shopping barndominium house plans or ADU house plans who want flexibility, four bedrooms, and rental potential without giving up modern style.
Want a lakeside barndominium? See the 4 bed lake barndominium house plan. Prefer single-level living? Check the 3 bed 2 bath ranch house plan. Looking for a modern cabin? Explore the 2 bed modern cabin & lake house plan or the 3 bed modern loft house plan.
Yes. It includes a separate accessory dwelling unit (ADU) with a kitchenette, a bathroom, a multi-functional bedroom/office space, and a cozy loft bedroom, plus a workshop and storage area with a French garage door. The ADU is independent of the main house and accessed from outside.
The main residence has three bedrooms (a ground-floor master plus two upstairs), and the ADU adds a fourth with its loft bedroom. A flexible upstairs play area can also be enclosed as an additional room.
Yes — the self-contained ADU makes it ideal for aging parents, adult children, or guests, and it can just as easily be rented out for income since it has its own entrance, kitchenette, and bath.
The Twin is two simple barn-style structures — the main house and the ADU — joined by a screen porch, creating a distinctive modern-meets-traditional look.
There are two full bathrooms in the main house plus a ground-floor powder room, and a separate bathroom in the ADU.
The Study Plans Package is a preliminary set for reviewing the design, sharing with family, and getting early build estimates. The Building Plans Package is the full, detailed construction set your builder uses to permit and build the home.
Generally, our customers receive quotes in line with local average construction costs, ranging between $250 - $600 per sqft, depending on location, finishes, and site conditions. For a more accurate and detailed estimate, we recommend purchasing the study set and sharing it with your preferred builder.
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See the Study Plans Detailed - Click Here
The Study Plans Includes:
• 9 - 15 sheets of Digital PDF Format Drawings
• Floorplans
• Exterior Elevations
• Building Sections
• Kitchen and Bathroom elevations
• Kitchen Cabinet chart
• Wall details with materials
* Easy upgrade. We will deduct the study set payment when you purchase the building plans.
Designed to help you take the first step toward building your green home, the drawing pack contains everything you need to make informed choices about your home. The drawing pack comes in a digital PDF file and includes 15 sheets of architectural drawings with detailed dimensions. This set can be used to get an exact cost estimate and inquire about the local permit process.
Note * The study set does not grant a license to the user to build the house using these plans. It is intended as a general inquiry and guide.
See the Building Plans Detailed - Click Here
The Building Plans Package Includes:
• 17 - 30 sheets of Digital PDF Format Drawings + CAD and 3D Files
• Wall types with materials
• Floor plan
• Roof Plan
• Foundation Plan
• Truss Plan
• Deck Framing Plan
• Exterior Elevations
• Building Sections
• Wall Details and Eaves Details
• Windows and Doors Schedule
• All Interior Elevations
• Cabinet Schedule
• HVAC and Faucet Plumbing Plan
• Duct Plan
• Electrical Plan
• Foundations details
When it comes to building your dream home, there is one thing that should always be on the agenda: obtaining a set of quality drawings. Our package includes details and CAD and 3D files to collaborate with your local designer, engineer, specialty consultants, and builder. Our design team also offers design edits in-house if needed.
The blueprint package includes 26 sheets of drawings and information! With our blueprint package, you can get bids from contractors, have your plans prepared and stamped by a local engineer, and apply for a building permit with your local code enforcement office. Our package lets you break ground as soon as possible, streamlining the building process and turning your dream home into a reality.
All orders are delivered digitally and automatically upon purchase. You will receive a download link directly to your email inbox within minutes of completing your order.
If you haven't received your download link within 24 hours, please contact us at hello@designwithfrank.com and we'll be happy to help.
No Physical Copies
All plan sets are digital files only — no physical prints are shipped. Files are formatted to standard architectural paper sizes and can be printed at any local print shop, Staples, or FedEx Office location.
Due to the nature of digital products, all sales are final. We do not offer returns or refunds on downloaded files.
However, we understand that projects don't always move forward — zoning restrictions, permitting issues, or other unforeseen circumstances can arise. In rare cases, we may offer a store credit or partial refund at our discretion. To request a review, please contact us at hello@designwithfrank.com within 30 days of purchase with a brief explanation of your situation.
All refund requests are reviewed on a case-by-case basis and are not guaranteed.
Need to make changes and adapt the plans to your site and vision?
Our professional design team can provide customization services for our existing floorplans. We also provide comprehensive residential design service from design to build. We will provide a free price quote within 1 to 3 business days.
Our blueprint package includes CAD and 3D model files, allowing you to work with a local designer to customize the floor plan according to your preferences and site conditions.
Additionally, we have an in-house design team that can provide minor design customization services. To request customization, please submit your requirements via this link, and we will respond with a quote and estimated time frame.
Yes, the exterior materials can be adjusted according to your preferences in consultation with your local builder. Our drawings focus on the dimensions of the building, allowing for flexibility to change exterior materials and accommodate different thicknesses.
The study set is intended for early-stage planning, such as obtaining quotes, searching for land, and consulting with local builders and permitting authorities. However, the study set cannot be used for actual construction, and we do not grant a license to build our designs with a study set.
The building plans, on the other hand, is designed for obtaining detailed cost estimates, building permits, and actual construction. It includes comprehensive building details and a material list, simplifying the building process and permitting procedures. The building plans package comes with a single building license.
Our designs adhere to the International Residential Code (IRC) standards at a federal level. We have optimized our homes for insulation appropriate for a wide range of climates. While our customers have secured building permits in over 21 states, local county specifications can differ. We advise consulting with your local building department to ensure all requirements specific to your area are met.
You are granted a single-use building license when you purchase a blueprint package. This license permits you to build one home using the provided plans. Please note that the plans are copyrighted, and any unauthorized reproduction, modification, or reuse is prohibited.
As for stamps, our plans are not pre-stamped by an engineer or architect. This is because local requirements vary, and you may need to have the plans reviewed and stamped by a licensed professional in your jurisdiction. It is essential to consult your local building department to determine if a stamp is required and to ensure the plans comply with local regulations.
