Barndominium shell packages: what Coast to Coast can build and what you still need to plan

A lot of buyers come to us with a solid idea of what they want in a barndominium. They've scrolled through builds on social media, watched a few YouTube walkthroughs, and have a general sense of the layout. But when it gets to the actual order, one question keeps coming up: what exactly is in the shell package, and what do I still need to figure out on my own?

Good question to ask before you buy, not after.

Here's what we build, what stays in your hands, and how to sequence the planning so your build doesn't stall the week after the structure goes up.

Key highlights

• A barndominium shell from Coast to Coast includes the steel frame, roof panels, exterior wall panels, and all doors and windows you configure at the time of order
• The shell does not cover your concrete slab, interior finish-out, electrical, plumbing, or HVAC
• Lean-tos, covered porches, wraparound configurations, and open bays are built into the original order
• Engineer-certified drawings are available to support permit applications
• Frame outs let you leave rough openings for doors or windows you haven't purchased yet
• The buyers who move fastest have their slab ready and their contractor hired before delivery day
• Design Your Building at coast-to-coastcarports.com or call (866) 681-7846

Planning your shell layout? Use the 3D Estimator & Color Planner to start shaping your roof style, colors, openings, and exterior look before you request a quote.

What comes with your barndominium shell

We build the steel structure. The frame, the roofing system, exterior wall panels, and every opening you spec out are all part of what we deliver and install. Nothing inside that shell is built yet. That's the whole point. You get a weather-tight exterior to work from, and your contractor handles the interior.

Here's how each part of the shell breaks down:

The steel frame and roofing system

The structural frame runs from the anchor points in your slab up through the ridgeline. Roofing panels sit on top, spanning the full building length.

You pick your roof style before we build. Vertical roof panels run perpendicular to the ridge. They shed water and debris efficiently, and for a building you plan to live in, vertical is the right call. Most buyers on residential barndominium orders go vertical without much debate.

Boxed-eave (A-frame) panels run horizontal and cost less, though they hold debris in the channels over time. For shop or storage applications where residential performance standards aren't the priority, they work fine. Dual-peak roof configurations are also available if the exterior profile matters for how the finished building looks from the road.

Exterior wall panels

All four sides get steel wall panels attached to the frame and sealed at the joints. That gives you a weatherproof shell on the outside and an open, workable interior from day one.

Color locks in at the order stage. We carry a full range of standard colors. Two-tone options with a wainscoting trim line are available if you want a polished exterior look before the interior work is done. A lot of residential buyers choose wainscoting specifically because it breaks up the flat wall profile and gives the building a finished appearance right away.

Doors, windows, and frame outs

Every opening in the shell has to be planned upfront. Roll-up garage doors, walk-in entry doors, and windows are all built into the frame during manufacturing. You can't add a new opening cleanly after installation without cutting into finished steel, so the best time to make these decisions is at the order stage.

Frame outs are one of the most practical options buyers don't always know about. If you want a custom exterior door, a large picture window, or a sliding barn door but haven't purchased it yet, we can frame out a rough opening to your dimensions. Your contractor or GC fills it in later. It's a smart way to leave flexibility in the shell without committing to a specific door or window product before you're ready.

Lean-tos and covered porches

Lean-tos and porch configurations attach directly to the main structure and are built as part of the original order. Common setups we build:

• Front lean-to porch for a covered residential entry
• Side lean-to for covered equipment or vehicle storage
• Wraparound lean-to with coverage on multiple sides
• Open bay addition for drive-through access off the main structure

The wraparound lean-to is popular on residential builds. It adds covered outdoor living space and gives the building a home-like presence from the road.

Want the porch built into the original shell? Compare layouts like a barndominium with a front lean-to porch before you finalize the order.

What the shell doesn't include

The shell gives you a weatherproof exterior. Everything on the inside is still your job or your contractor's.

The concrete slab

We install the building on your slab. You have it poured, cured, and ready before our crew arrives.

The slab needs to be level and sized to match your building's footprint. Anchors go into the concrete at specific points along the perimeter and through the base. If the slab isn't ready on delivery day, installation can't happen, and every trade you have lined up behind us gets pushed back too.

Some counties have specific requirements for slab thickness, rebar placement, and footings on structures intended for residential occupancy. A slab that meets code for a storage barn might not satisfy the same county inspector on a building you're planning to live in full-time. Talk to your local building department before you pour.

If you're still planning the slab, read our guide on concrete foundation mistakes with steel building projects before the site work starts.

Interior finish-out

The shell gives you an open interior with nothing else built in it yet. The finish-out list is long:

• Interior stud walls and framing
• Insulation (spray foam, batt, or rigid board are all common in barndominium builds)
• Drywall, metal liner panels, or exposed steel interior
• Flooring throughout
• Ceiling treatment
• Any loft framing or second-floor buildout

Some buyers do a minimal finish-out for a shop/living combo with bare walls in the work area and finished drywall in the living section. Others go fully residential throughout. Both work. What doesn't work is trying to hire your contractor the week after we deliver. Have that person hired and scheduled before the shell goes up.

Electrical, plumbing, and HVAC

These three trades aren't part of the shell, and the decisions you make about them affect your shell design before you even order.

Where your electrical panels go, where plumbing stubs up through the slab, what HVAC system fits your total square footage. All of that influences interior layout. Which means where you position roll-up doors, walk-in entries, and windows has to account for where mechanical rough-in will land.

A GC with experience in metal building projects can walk your lot, review your shell configuration, and catch those conflicts before they are built in. That conversation is worth having early in the process, not after you take delivery.

What's included vs. what you still need

Component	Included in shell	Your responsibility
Steel structural frame	Yes
Roof panels (vertical or A-frame)	Yes
Exterior wall panels, all four sides	Yes
Roll-up garage doors	Yes (configured at order)
Walk-in entry doors	Yes (configured at order)
Windows	Yes (configured at order)
Frame outs (rough openings)	Yes (configured at order)
Lean-tos and covered porches	Yes (configured at order)
Anchor installation into slab	Yes
Concrete slab, poured and cured		Yes
Interior stud framing		Yes
Insulation		Yes
Electrical rough-in and finish		Yes
Plumbing rough-in and finish		Yes
HVAC system		Yes
Drywall or interior liner panels		Yes
Flooring		Yes
Permits and inspections		Varies by county

Sizing your barndominium shell correctly

Square footage planning gets easier when you think in terms of how you'll actually use the space, not just what sounds like enough room on paper.

Live/work combo layouts

A split layout works well for buyers who want shop space and living space in the same building. The shop takes one end, the living quarters take the other. A 30x50 gives you 1,500 square feet total to divide. The 40x60 footprint gives you 2,400 square feet, which is enough for a modest 2-bedroom residential setup on one side and a functional shop floor on the other. If that size range is where you're looking, our 40x60 barndominium planning guide walks through what that square footage actually looks like laid out.

Full residential setups

For a building you plan to use as your primary residence with no shop component, lean-tos and wraparound porch configurations carry a lot of weight. A wraparound lean-to adds usable covered square footage without increasing the enclosed footprint, and it gives the building a residential street presence instead of the flat-walled shop look.

Shop first, living space later

Some buyers start with a functional shop or agricultural building and plan to convert or add living space later. If that's your plan, spec the sidewall height taller than you think you need right now. Retrofitting a loft or second-floor buildout into a building with 10-foot sidewalls is much harder than working with 14 or 16 feet from the start.

Trying to choose the right footprint? Start with the use case first, then request a quote once your shell size, roof style, doors, windows, and porch layout are clear.

Permits and engineer-certified drawings

Permit requirements depend on your county and on how you intend to use the building. A storage barn on rural acreage gets treated differently than a full-time residence on a subdivided parcel.

Engineer-certified drawings are available for your build. These are stamped structural documents that show your building's specs as configured and meet most county permit application requirements. If your local building department asks for stamped drawings before they'll issue a permit, we can get them to you.

Pulling the actual permit, paying the fees, and scheduling required inspections are your responsibility. But we can help you secure the paperwork the county typically asks for to start that process.

One thing worth knowing: some counties approve barndominium permits in a week or two. Others take a month or longer. Starting that conversation with your building department before you finalize your order keeps your timeline from stacking up on the back end.

Financing

We offer financing and Rent-To-Own options for buyers who want to spread out payments. That's worth exploring early in the process too, so your financing is sorted before the order goes in.

Most project delays don't happen during installation. They happen from decisions that weren't made before the shell arrived.

The sequence that works best:

1. Confirm zoning and intended use for your site
2. Talk to your county building department early about permit requirements
3. Hire a GC or contractor with experience on metal building projects
4. Configure your shell: size, roof style, doors, windows, lean-tos, and color
5. Request engineer-certified drawings if your county requires them for the permit application
6. Pour and cure your concrete slab
7. Schedule delivery and installation

We build and deliver quickly once the order is placed. When your site is prepped and your contractor is already hired, interior work can start the same week we finish installation.

Need pricing for your exact shell? Request A Quote or call Coast to Coast Carports at (866) 681-7846 to talk through your building configuration.

Frequently asked questions

What is a barndominium shell package?

A barndominium shell is the steel structure we deliver and install on your property. It includes the structural frame, roof panels, exterior wall panels, and all configured doors, windows, and openings.

Do I need a concrete slab before the shell can be installed?

Yes. We anchor the building into your slab, so it needs to be poured, cured, and level before our crew arrives. If the slab isn't ready on delivery day, installation can't happen, and your project timeline gets pushed back.

Can I customize the size of my barndominium shell?

Yes. We build to your specs. Width, length, sidewall height, roof style, lean-tos, porches, doors, windows, frame outs, and exterior color are all configured at the time of order.

Are engineer-certified drawings available for permit applications?

Yes, and they're often required when the building is intended for residential occupancy. We provide stamped drawings that meet most county permit application requirements.

What roof style should I choose for a barndominium I plan to live in?

Vertical roof panels are the better choice for residential use. They shed rain and debris more efficiently than boxed-eave panels and perform better over the long term.

Can I add a lean-to or covered porch after the building is already installed?

Lean-tos are built as structural extensions of the original frame. Adding one after installation isn't a simple retrofit, so the time to decide on your lean-to or porch configuration is before you finalize the order. If you're even slightly on the fence about adding a porch, plan it in now.

Start with the structure, then build from there

A barndominium shell from Coast to Coast gives you a strong, weather-tight structure to build from. What happens inside is your design, your finishes, and your contractor's work.

The buyers who move through the process without delays are the ones who got their site prepped, their contractor hired, and their permit conversation started before delivery day. The shell goes up fast. Interior work takes time, and it goes cleaner when the planning is already done.

Design Your Building at coast-to-coastcarports.com, request a quote online, or call us at (866) 681-7846 to talk through your configuration.