Luxury Barndominium in Indiana

A luxury barndominium is where the steel or post-frame shell stops being a shortcut and becomes the point: 50- and 60-foot clear spans, great rooms open to the ridge, glass gable ends, a primary suite with a soaking tub, a finished shop for the collection. We build them in Indiana, and at this size almost every structural element steps outside the prescriptive tables of the residential code. The 2020 Indiana Residential Code anticipates that: it accepts engineered design for anything beyond its limits and defines exactly who may certify it — an architect registered under IC 25-4 or a professional engineer registered under IC 25-31. That design professional is a third party engaged for your project; we build to their stamped drawings, and we assemble the permit package around them.

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What actually changes with this feature

The look is the easy part. These are the decisions that follow from it.

Clear spans come from the engineered frame

A 60-foot great room with no posts is carried by engineered steel frames or engineered trusses, not by a span table. Indiana leaves truss paperwork to the local jurisdiction for houses: 675 IAC 14-4.4-63 and 14-4.4-81 require truss design drawings to be provided to the building official "by local ordinance for Class 2 structures." Where a city, town or county issues the building permit, IC 22-11-21-9 also requires the application to state the types and location of lightweight I-joists or lightweight roof trusses in the floor and roof, and IC 22-11-21-10 has the building commissioner notify the local fire department and 911 center — a disclosure that matters most in exactly the large, open structures luxury plans produce.

Private plan review and inspection are available by statute

Where a city, town or county requires a building permit, plan review or inspection for a house, IC 36-7-2-9.1(d) requires it to allow the review or inspection to be conducted by its own inspector, another unit's inspector, or a private provider who is a registered architect, a registered professional engineer or a certified building official — and subsection (e) lets the permit applicant choose the private provider route under IC 36-7-2.5. On a complex engineered house, a reviewer who reads steel-frame drawings every day can shorten the back-and-forth. It is an option, not a requirement; we discuss it when the permit set is ready.

A large soaking tub counts as a bedroom for the septic system

Indiana's on-site sewage rule treats a large jetted tub as a bedroom. 410 IAC 6-8.3-7 defines a "bedroom equivalent" as "any jetted bathtub with a capacity of greater than one hundred twenty-five (125) gallons," and design daily flow is 150 gallons per day per bedroom and bedroom equivalent (410 IAC 6-8.3-12). On a four-bedroom plan with such a tub, the system is sized as five: the minimum septic tank in Table III of 410 IAC 6-8.3-60 goes from 1,250 gallons to 1,500. It is a line on the fixture schedule that changes a buried system, so it belongs in the design before the soil evaluation, not after.

Walls of glass are held to the same window standard

Indiana's energy table, 675 IAC 14-4.4-91, sets a maximum fenestration U-factor of 0.35 in both of the state's climate zones and R-38 for ceilings, with no allowance for how much of the wall the glass occupies. Energy documents for a house are submitted "as required by local ordinance" under 675 IAC 14-4.4-89. Large glazed gable ends are the signature of a luxury barndominium; we specify the glass to that U-factor and let the engineered frame, not the glazing, carry the wind bracing.

Engineered, and stamped by the right person

The 2020 Indiana Residential Code names who certifies what the tables do not cover

IRC R301.1.3 provides that where a building of otherwise conventional construction contains structural elements exceeding the code's limits, "these elements shall be designed in accordance with accepted engineering practice," and that engineered design under the International Building Code is permitted for anything in the residential code's scope. Indiana's amendments then say who counts. 675 IAC 14-4.4-3 replaces the model definition: a registered design professional is "An architect who is registered under IC 25-4 or a professional engineer who is registered under IC 25-31." Indiana's rewritten R101 adds that where enforcing a code provision would violate the "certification of engineered products by a registered architect registered under IC 25-4 or a professional engineer registered under IC 25-31," the professional certification applies. For a luxury barndominium — long spans, tall sidewalls, point loads from a loft or a mezzanine, large door and window openings — that certification is the structural spine of the permit set.

Common ways to build this

Common configurations we see. Yours does not have to match one exactly — this is a starting point for the conversation, not a catalog.

Great-room estate

3,600 sq ft living / 60 ft clear-span great room

A single-level plan built around a vaulted great room open to the ridge, with the primary suite at one end and guest wings at the other. The clear span and the glazed gable are the engineered elements; everything else can often follow the residential code's tables. Truss or frame drawings go to the building official as the local ordinance requires.

Estate with a finished show shop

3,200 sq ft living / 2,400 sq ft finished shop

A heated, finished shop for vehicles, equipment or a studio, under the same roof as the house. For a shop used by the household, Indiana classifies the dwelling and its garage or barn as one Class 2 structure (IC 22-12-1-5); a shop with staff or customers can become Class 1 in that part under IC 22-12-1-4 — tell us which it is before design.

Two-level lodge with a mezzanine

2,800 sq ft main / 1,200 sq ft upper and mezzanine

Timber-look interiors, a mezzanine overlooking the great room and a stone fireplace wall. The mezzanine's point loads and the fireplace mass are engineered elements on a clear-span frame, and the upper floor adds stairs built to Indiana's 8 1/4-inch riser and 9-inch tread limits and guards at the open edge.

Ways to build this size

A footprint can go together several ways. These are the service lines most relevant to it.

Custom Plans

Custom barndominium floor plans drawn for your Indiana lot, county and budget — shop bays, lofts and porches included. Start with a free plan survey.

Steel Construction

Red-iron clear-span frames designed to your county's own snow, wind and seismic row in the Indiana code, on drawings sealed by an Indiana-registered PE.

Turnkey Builds

One contract from bare land to move-in: parcel checks, zoning, septic and well, plans, the permits your county issues, construction, inspections and handover.

Luxury Barndominium: common questions

7 questions we get asked most often about this footprint. If yours is not on the list, ask it directly.

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Who designs the structure of a luxury barndominium in Indiana?

The elements beyond the residential code's prescriptive limits are designed under IRC R301.1.3 by a registered design professional — which Indiana's amendment in 675 IAC 14-4.4-3 defines as an architect registered under IC 25-4 or a professional engineer registered under IC 25-31. That professional is engaged for your project as a third party and seals the structural drawings. We coordinate with them and build to their design; the steel-frame or post-frame manufacturer's engineered drawings are typically part of that package.

Can a private reviewer do the plan review instead of the county?

Where the city, town or county requires plan review or inspection for a house, yes, at the applicant's choice. IC 36-7-2-9.1(d) requires the unit to allow review or inspection by a private provider who is a registered architect, a registered professional engineer or a certified building official, and subsection (e) lets the applicant choose that route under IC 36-7-2.5. It applies only where the unit requires a permit, plan review or inspection for Class 2 structures in the first place.

Does a big jetted tub really change the septic system?

Yes. 410 IAC 6-8.3-7 counts any jetted bathtub over 125 gallons as a bedroom equivalent, and 410 IAC 6-8.3-52(k) says it "shall be treated as an extra bedroom" for sizing. At 150 gallons per day per bedroom and bedroom equivalent, a four-bedroom house with a large jetted tub is sized like a five-bedroom house, and the minimum septic tank moves from 1,250 to 1,500 gallons (Table III, 410 IAC 6-8.3-60). A soaking tub without jets is not a bedroom equivalent under that definition.

Do I have to install fire sprinklers in a large barndominium?

Not under the state residential code. 675 IAC 14-4.4-21 provides that in Class 2 structures "automatic fire sprinkler systems are optional," and that if installed they follow Section P2904 or NFPA 13D. Some owners of large homes choose them anyway. The use of the building can change that answer — a part used as a Class 1 structure falls under the commercial code.

What do I have to tell the building department about the trusses?

Two things, where a local unit issues the permit. First, truss design drawings go to the building official as required by local ordinance for Class 2 structures (675 IAC 14-4.4-63 and 14-4.4-81). Second, IC 22-11-21-9 requires the permit application to list the types and location of any lightweight I-joists or lightweight roof trusses in the floor or roof; the building commissioner then notifies the local fire department and 911 center under IC 22-11-21-10.

What does a luxury barndominium cost in Indiana?

We price from the drawings for your site, not from a per-square-foot number, because the items that make a barndominium luxurious — clear spans, glazing, finishes, a finished shop, the septic system the fixtures require — vary more than the shell does. The project survey on this site collects enough about the land and the plan for a first conversation about budget.

How do we start a luxury barndominium?

With the land and the program. Through the project survey, tell us where the parcel is and what the house has to hold. The county's row in the state code table sets the design loads — for example, a 30-inch footing depth and 20 psf ground snow load in Hamilton County, and 36 inches and 30 psf in Porter County (675 IAC 14-4.4, Table R301.2(1)) — and from there the engineered frame, the glazing and the septic design are developed together.

Want this drawn for your program and your parcel? That is where a build actually starts.

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Sources

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Tell us what you want to build and we will draw this for your program, then confirm what it looks like on your parcel, which office permits it, and a realistic budget range. That conversation costs nothing.

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