30X50 BARNDOMINIUM: THE PERFECT MID-SIZE BUILD

How Big Is a 30x50 Barndominium?

A 30x50 barndominium provides 1,500 square feet of living space on a single level, with the option to add a second story for a total of 3,000 square feet. The 30-foot width and 50-foot depth create a versatile rectangular footprint that fits comfortably on most residential lots and accommodates 2-3 bedrooms, 1-2 bathrooms, and an open-concept living area.

At 1,500 square feet, the 30x50 is one of the most popular barndominium sizes in the country. It sits in a sweet spot: large enough to function as a full-time family home, yet compact enough to keep construction costs manageable. For context, 1,500 square feet is roughly the size of the average American home built in the 1970s and is comparable to many modern two-bedroom apartments in urban areas.

If you are new to barndominiums and want to understand the full picture -- what they are, how they are built, and why steel construction is gaining popularity -- start with our complete guide to barndominiums. This article focuses specifically on the 30x50 size: what it costs, how to lay it out, and whether it is the right fit for your needs.

The 30-foot width is significant because it determines your interior room widths and the clear-span engineering requirements. A 30-foot clear span is well within standard steel building capabilities and does not require interior support columns, which means you have complete freedom in your floor plan layout. You can place walls wherever you want -- or leave the entire space open.

How Much Does a 30x50 Barndominium Cost?

A 30x50 barndominium costs between $37,500 for a shell kit and $450,000 for a luxury turnkey build. The most common price range for a fully finished 1,500 square foot barndominium is $75,000-$225,000, while Barns & Barndos turnkey builds start at $352,500 for the Standard tier and go up to $450,000 for Luxury.

The wide price range reflects the enormous difference between buying just the steel structure and having a complete, move-in-ready home. For a full breakdown of what drives barndominium pricing at every level, see our complete barndominium guide. Here is how costs break down specifically for the 30x50 size:

The Barns & Barndos pricing tiers are higher than generic “finished barndominium” averages because they represent a genuinely premium product. Every build includes galvanized steel framing, a 50-year PVDF warranty on exterior finishes, structural engineering by professionals licensed in all 49 states, and interior finishes that compete with custom home construction. Explore the full details of what each tier includes on our finish tiers page.

What Is NOT Included in These Prices

All of the prices above cover the building itself. The following costs are separate and vary by location:

• Land purchase (varies dramatically by market)
• Site preparation and grading ($2,000-$10,000)
• Septic system and well, if not on municipal services ($10,000-$40,000)
• Driveway and access road ($1,500-$10,000)
• Utility connections -- electric, water, gas ($2,000-$20,000)
• Permits and engineering fees ($3,000-$12,000)

For a detailed breakdown of these additional expenses, read the hidden costs section of our barndominium guide.

What Are the Best 30x50 Barndominium Floor Plans?

The best 30x50 barndominium floor plans maximize the 1,500 square foot footprint with an open-concept living, kitchen, and dining area along one end (typically 30x20 or larger) and bedrooms grouped at the opposite end for privacy. The most popular configurations are a 2-bed/2-bath layout with a large living area or a 3-bed/2-bath plan with a more efficient use of space.

Because a 30x50 barndominium uses steel clear-span construction, there are no load-bearing interior walls. This means you can place rooms wherever you want and reconfigure later without structural concerns. For a full collection of layouts across every size, see our barndominium floor plans guide.

Layout 1: The Open-Concept 2-Bed / 2-Bath (Most Popular)

This layout dedicates roughly 750-800 square feet to an open living, kitchen, and dining area that spans the full 30-foot width. The remaining 700-750 square feet is divided between two bedrooms (each 12x14 or larger), two full bathrooms, a laundry closet, and a hallway. The primary bedroom includes an en-suite bathroom, while the second bedroom shares the hall bathroom.

This is the most popular 30x50 layout because the oversized living area feels significantly larger than 1,500 square feet. It works well for couples, empty nesters, and small families who prefer spacious common areas over extra bedrooms.

Layout 2: The Family-Friendly 3-Bed / 2-Bath

By reducing bedroom sizes slightly (10x12 to 11x13), you can fit three bedrooms into the same 1,500 square foot footprint. The open living area shrinks to approximately 600-650 square feet, but it still spans the full 30-foot width and maintains an open, airy feel. The primary bedroom gets an en-suite bathroom, while bedrooms two and three share the second bathroom.

This layout is ideal for families with children or anyone who needs a dedicated home office or guest room. The trade-off is modestly smaller bedrooms compared to the 2-bed plan.

Layout 3: The Live/Work Split (Home + Shop)

This layout divides the 30x50 footprint into roughly 1,000 square feet of living space and 500 square feet of attached shop or garage. The living side features a compact 1-bed/1-bath or 2-bed/1-bath plan, while the shop side includes an overhead garage door, utility sink, and separate exterior access. An interior door connects the two zones.

This is perfect for hobby builders, mechanics, crafters, or anyone who needs workspace alongside living quarters. It also works well as a first-phase build: start with the shop and a small living area, then finish the shop side as additional living space later.

Floor Plan Design Tips for 30x50

• Cluster wet areas: Place the kitchen, bathrooms, and laundry on the same side of the building to minimize plumbing runs and reduce costs
• Use the full 30-foot width: Open living areas that span the entire width feel dramatically larger than those broken up by hallways
• Position bedrooms away from the entry: Grouping bedrooms at one end creates a private zone separated from the active living area
• Plan for furniture: A 12x14 bedroom fits a king bed with nightstands and a dresser. A 10x12 room fits a queen bed comfortably but feels tight with a king
• Consider ceiling height: Steel buildings allow for 10-14 foot ceilings, which makes 1,500 square feet feel much larger than the same area with standard 8-foot ceilings

How Does a 30x50 Compare to a 40x60 Barndominium?

A 30x50 barndominium provides 1,500 square feet for $37,500-$450,000 (depending on finish level), while a 40x60 barndominium provides 2,400 square feet for $60,000-$720,000. The 40x60 offers 60% more living space and typically accommodates 3-5 bedrooms, but it costs proportionally more for both the shell and interior finishing.

Choosing between a 30x50 and a 40x60 barndominium is one of the most common decisions barndominium buyers face. Here is how they compare across every major category:

When to Choose a 30x50

The 30x50 is the better choice when your household is 1-4 people, your budget is under $400,000 for turnkey construction, you have a smaller lot, or you simply do not need more than 1,500 square feet of living space. It is also excellent as a retirement home, vacation property, or rental unit where excess square footage does not add proportional value.

When to Choose a 40x60

Step up to a 40x60 if you need 4+ bedrooms, want a dedicated shop or garage attached to your living space, are building for a family of five or more, or prefer the flexibility that comes with 2,400 square feet. The per-square-foot cost is similar between the two sizes, so the decision should be based on space needs rather than cost efficiency.

Can You Add a Shop or Garage to a 30x50 Barndominium?

Yes, you can include a shop or garage within a 30x50 barndominium by dedicating a portion of the 1,500 square foot footprint to workspace, or you can attach a separate shop bay to the main structure. A common configuration allocates 1,000 square feet for living space and 500 square feet for a shop with an overhead garage door.

The combination of living space and workspace is one of the defining advantages of barndominium construction. Steel clear-span framing makes it simple to include an overhead door and a workshop area within the same building envelope, which is far more affordable than building a separate detached garage.

Option 1: Integrated Shop (Within the 30x50 Footprint)

This approach carves out 400-600 square feet from the 30x50 footprint as a garage or shop. A typical layout uses a 30x17 shop area (510 square feet) with a 10x10 or 12x12 overhead door on one end, leaving 30x33 (990 square feet) for living space. The shop and living areas are separated by an insulated wall with an interior door.

The trade-off is obvious: a 500-square-foot shop reduces your living space to approximately 1,000 square feet. That is tight for a family but works well for a single person, a couple without children, or a weekend retreat.

Option 2: Attached Shop Bay (Expanding the Footprint)

A better option for most families is to keep the full 1,500 square feet for living and attach a separate shop bay to the side or end of the building. Adding a 20x30 (600 SF) or 20x40 (800 SF) shop bay to the 30x50 structure creates a combined footprint of 2,100-2,300 square feet with full separation between living and workspace.

The attached bay shares one wall with the main structure, which reduces material cost compared to a fully detached building. It also simplifies utility connections -- you can run electrical and lighting from the main panel rather than installing a separate service.

Garage Door Considerations

If you plan to include a garage or shop, account for the following in your design:

• Door size: A standard 10x10 overhead door accommodates most trucks and SUVs. A 12x12 or 12x14 door fits lifted trucks and most RVs or boats.
• Ceiling height: Plan for at least 12-foot walls in the shop area to accommodate a 10-foot overhead door with clearance for the track and opener.
• Insulation separation: If the shop is within the main building, an insulated partition wall between the shop and living space is essential for climate control and noise reduction.
• Flooring: Shop areas typically use a plain concrete slab rather than finished flooring. Including a floor drain simplifies cleanup.

What Foundation Does a 30x50 Barndominium Need?

A 30x50 barndominium typically requires a monolithic concrete slab foundation, which costs approximately $7,500-$12,000 for 1,500 square feet. The slab should be 4-6 inches thick with thickened edges (12-18 inches) at the perimeter and anchor bolt locations, poured over a compacted gravel base with a vapor barrier.

The foundation is one of the most critical components of any barndominium build. It supports the entire steel structure, determines your floor level and drainage, and is essentially permanent once poured. Getting it right the first time is non-negotiable.

Monolithic Slab (Most Common)

The monolithic slab is the standard foundation for 30x50 barndominiums. It consists of a single pour of concrete that creates the floor and perimeter footing in one step. For a 30x50 building:

• Slab thickness: 4 inches (interior) to 6 inches (under heavy load areas)
• Perimeter thickened edge: 12-18 inches deep, 12-16 inches wide
• Reinforcement: #4 rebar on 18-24 inch centers or 6x6 welded wire mesh
• Base: 4-6 inches of compacted gravel over native soil
• Vapor barrier: 6-mil poly sheeting under the slab
• Anchor bolts: Placed per the steel manufacturer's engineering drawings

Pier and Beam (For Challenging Sites)

Pier-and-beam foundations are used when the site has poor soil conditions, a high water table, flood zone requirements, or significant grade changes. Concrete piers are drilled to a stable soil layer or bedrock, and steel or concrete beams span between them. This foundation type costs $12,000-$25,000 for a 30x50 building -- roughly double the cost of a standard slab.

Site Preparation Before the Pour

Before the foundation is poured, your site needs to be prepared:

• Clearing and grading: The building pad must be level (or graded to drain) with all vegetation, topsoil, and debris removed ($1,000-$5,000)
• Soil compaction: Native soil must be compacted to prevent settling. If the soil is poor (expansive clay, organic material, or fill dirt), it may need to be removed and replaced ($2,000-$10,000)
• Plumbing rough-in: Drain lines and water supply lines for bathrooms, kitchen, and laundry must be placed before the slab is poured. Changing plumbing locations after the pour requires cutting the concrete ($500-$2,000 per change)

Is a 30x50 Barndominium Right for You?

A 30x50 barndominium is right for you if you need 1,500 square feet or less of living space, your household is 1-4 people, your total building budget is under $450,000, and you want a home that is affordable to build, energy efficient to operate, and low maintenance to own long-term.

The 30x50 is the most popular mid-size barndominium for good reason: it delivers genuine full-time livability without the cost and complexity of a larger build. But it is not the right choice for everyone. Here is how to decide:

The 30x50 Is Ideal If You Are:

• A couple or small family (1-4 people) who values efficient, low-maintenance living
• Building your first home and want to keep total project cost under $200,000 (DIY/basic finish) or under $450,000 (turnkey with premium finishes)
• An empty nester downsizing from a larger home who wants single-story living with no stairs and no wasted space
• Building a vacation home, hunting cabin, or weekend retreat where 1,500 square feet provides more than enough space
• An investor building a rental property where the 2-3 bedroom, 1,500 SF format matches the highest-demand rental demographic
• Looking for a live/work space that combines a small shop or studio with comfortable living quarters

Consider a Larger Size If:

• Your household is five or more people and you need 4+ bedrooms without a second story
• You want a large dedicated shop or garage (600+ SF) in addition to full living space
• You entertain frequently and need a large open living area beyond what 1,500 SF provides
• You plan to work from home full-time and need a dedicated office in addition to the standard bedroom count

If those needs apply, read our 40x60 barndominium guide for the next step up in size.

Financing Your 30x50 Barndominium

One of the advantages of the 30x50 size is that it falls within the budget range of most construction loan programs. At $352,500 for a Barns & Barndos Standard turnkey build (or $75,000-$195,000 for a budget to mid-range finish), the 30x50 is financeable through construction-to-permanent loans, FHA construction loans, and USDA rural development loans in eligible areas. For a complete breakdown of financing options, see our barndominium financing guide.

Getting Started

If a 30x50 barndominium sounds like the right fit, the first step is to request a free budgetary estimate to get a precise cost estimate based on your specific location, site conditions, and finish preferences. Barns & Barndos provides detailed quotes that include the steel structure, foundation, complete interior finishing at your chosen tier, and all mechanical systems -- with no hidden costs or surprise allowances. Our barndominium service page outlines exactly what is included in every build.