The post frame barndominium has emerged as a popular residential building type that combines the structural efficiency of post frame construction with the aesthetic appeal of modern barn style homes. A 1,933 square foot, single story design with three bedrooms, two bathrooms, and a three bay garage demonstrates how this construction method delivers open, flexible living spaces at a competitive cost. This article covers the structural principles of post frame construction, open concept living strategies, bedroom placement for privacy, mudroom organization, three bay garage integration, and exterior finish options for a modern barndominium.
Understanding Post Frame Barndominium Construction
Post frame construction, also called pole barn construction, uses large structural posts embedded in the ground or set on a concrete foundation to support the roof and walls. Unlike conventional stick framing where the weight transfers through a continuous foundation wall, post frame buildings distribute loads through columns spaced 8 to 12 feet apart. This framing method creates large clear span interiors without load bearing walls, which is ideal for open concept living.
Structural Advantages of Post Frame Systems
The post frame system offers several structural benefits for residential construction:
- Clear spans of 30 to 60 feet without interior columns, allowing completely open floor plans
- Fewer foundation requirements because loads go through posts rather than continuous perimeter footings
- Faster construction timelines since posts go up quickly and roof trusses can be set immediately
- Better insulation potential with 6 to 8 inch wall cavities between posts for high R value batts
| Construction Method | Typical Cost per Square Foot | Clear Span Capability | Construction Timeline |
|---|---|---|---|
| Post frame (pole barn) | $80–$120 | 30–60 feet | 4–6 months |
| Conventional stick frame | $120–$180 | 12–16 feet with bearing walls | 6–10 months |
| Structural insulated panels (SIPs) | $140–$200 | 16–24 feet | 4–7 months |
| Insulated concrete forms (ICFs) | $150–$220 | 12–20 feet | 6–12 months |
Cost savings of 30 to 40 percent compared to conventional framing make post frame construction attractive for budget conscious homeowners, particularly in rural and agricultural areas where building codes permit this method. These savings can offset the cost of higher end finishes in the living areas.
Foundation Options for Post Frame Homes
Three foundation types work with post frame construction:
- Embedded posts: Pressure treated posts set 4 to 5 feet into the ground with concrete collars. This is the traditional method and the most economical, but it requires proper drainage to prevent rot.
- Concrete piers: Posts mounted on cast in place or precast concrete piers above grade. This method keeps wood out of ground contact and meets modern building codes.
- Continuous foundation: A conventional poured concrete wall with anchor bolts for post attachment. This costs more but provides a full basement or crawl space and meets all code requirements.
Open Concept Living as the Heart of the Barndominium
The interior of a 1,933 square foot barndominium centers on an open concept zone that combines the kitchen, dining area, and great room into a single volume. The clear span construction means no posts or columns interrupt this space. The result is a gathering area that feels significantly larger than the actual square footage might suggest.
Kitchen and Great Room Integration
The kitchen serves as the functional anchor of the open concept layout. A large central island with seating creates a natural division between the cooking zone and the living area without blocking sight lines. The great room should occupy one side of the open plan with the dining area between the kitchen and living space. Furniture placement in a 20 by 30 foot great room area can include a sectional sofa oriented toward a fireplace or media wall, with side chairs creating a conversation zone.
Lighting Strategy for Open Volumes
Barndominiums with post frame construction often have exposed trusses or high ceilings that require layered lighting. Pendant lights over the kitchen island at 36 inch spacing provide task lighting. Recessed cans at 8 foot spacing in the great room deliver ambient light. Track lighting or linear suspension fixtures can follow the ridge line for dramatic effect. Dimmer switches on all circuits allow the owner to adjust the mood from bright daytime to warm evening.
Bedroom Placement Strategies for Privacy and Function
A three bedroom barndominium with 1,933 square feet requires efficient bedroom placement to maximize privacy while maintaining the open concept advantage. The most effective layout places the primary bedroom on one side of the home and the two secondary bedrooms on the opposite side, with the living zone in between. This creates a split bedroom layout that separates the primary suite from guest and children rooms.
Primary Suite Configuration
The primary bedroom in this plan should measure at least 13 by 15 feet to accommodate a king bed, dresser, and seating area. The ensuite bathroom, positioned for privacy from the bedroom entry, includes a 3 fixture layout with vanity, water closet, and shower. A walk in closet at least 5 by 6 feet provides 30 square feet of hanging and folded storage. The primary suite should be oriented toward the rear or side of the property for quiet and views rather than toward the street.
Secondary Bedroom Sizing and Shared Bath Access
Two secondary bedrooms, each measuring 10 by 12 feet, accommodate children, guests, or a home office conversion. Both bedrooms share a 3 fixture hall bathroom with a single vanity, toilet, and tub shower combination. The hallway between these bedrooms and the bathroom should be at least 3 feet wide with a pocket door option to save space. Closets in each secondary bedroom should provide at least 6 linear feet of hanging rod space.
Mudroom Design and Garage Integration
A well designed mudroom connecting the three bay garage to the main living area is essential for barndominium functionality. Given the agricultural and rural context of many barndominiums, the mudroom must handle muddy boots, pet supplies, and outdoor gear. The mudroom should include built in lockers with individual cubbies for each family member.
Mudroom Layout Specifications
An effective mudroom in a barndominium plan includes the following elements:
- A bench 18 inches deep and 48 inches wide with shoe storage underneath
- Individual lockers 12 inches wide with hooks at 60 inches and shelves at 72 inches
- A counter or shelf at 36 inches for dropping mail, keys, and tools
- A deep utility sink for washing hands, cleaning gear, or watering plants
- A tile or luxury vinyl floor with a floor drain for hosing off mud
Three Bay Garage Capacity
A three bay garage provides parking for three vehicles plus room for a workshop or storage area. The minimum interior dimension for a three car garage is 30 by 24 feet, but adding 4 feet of extra depth creates space for shelving, a workbench, or a small workshop zone. Each bay should have an overhead door at least 9 feet wide and 7 feet tall, with 10 by 8 doors recommended for taller vehicles like trucks or SUVs. The garage floor requires a 4 inch thick concrete slab with welded wire mesh reinforcement and a vapor barrier beneath.
Exterior Finishes for Modern Barndominium Style
The exterior of a post frame barndominium uses materials that emphasize the agricultural heritage of the building type while delivering contemporary performance. Vertical siding in steel or fiber cement creates clean, uninterrupted lines that reference traditional barns. Warm wooden accents at the entry porch, garage doors, and window trim soften the industrial feel of metal siding.
A covered front entry porch serves as both a design feature and a functional transition space. The porch should be at least 6 feet deep to provide meaningful weather protection. Posts supporting the porch roof can be wrapped in wood or steel to match the overall aesthetic. A concrete stoop or stained slab at the entry provides a durable surface that withstands heavy traffic.
Siding Material Comparison
The choice of siding material significantly affects both appearance and maintenance requirements:
| Siding Material | Initial Cost per Sq Ft | Lifespan | Maintenance |
|---|---|---|---|
| Steel vertical panels | $5–$9 | 40+ years | Minimal, occasional wash |
| Fiber cement vertical | $7–$12 | 30–50 years | Paint every 10–15 years |
| Wood board and batten | $8–$15 | 20–30 years | Stain or paint every 3–5 years |
| Engineered wood | $5–$10 | 25–40 years | Paint every 8–12 years |
Vertical steel siding paired with horizontal board and batten accents at the entry creates the layered texture that modern barndominium design is known for. Standing seam metal roofing in a dark color such as charcoal or bronze completes the exterior package and provides a 40 to 60 year service life.