Converting a Barn Into a House: What It Really Takes

Let’s start with the thing most guides won’t tell you.

Converting an old barn into a home usually costs more than building a new barndominium of the same size — often considerably more. You’ll read the opposite constantly: that you’re saving money because the structure already exists. In practice, the structure is the cheapest part of any build, and an old barn frequently needs so much work to become a legal dwelling that you’d have been better off starting fresh.

That doesn’t mean don’t do it. We’ve seen conversions that were absolutely worth it. But the good reasons are usually about the building rather than the budget — a barn that’s been on the family land for a century, a structure with genuine character you couldn’t reproduce, a shell you already own on land you already have.

This guide covers how to work out whether your barn is a realistic candidate, what the conversion actually involves, and where the money goes.

Is your barn a candidate? Six things to check first

Before you spend anything on drawings, work through these. Any one of them can end the project, and finding out early costs nothing.

1. Does it have a real foundation?

The single biggest cost driver, and most old barns fail this test. A large proportion of historic barns sit on dirt floors, fieldstone piers, or timber sills laid directly on grade.

If yours does, the conversion involves lifting the barn on jacks and pouring a foundation underneath it — a specialist job, expensive, and one that can uncover further problems once the structure is off the ground and moving.

A modern pole barn on a concrete slab is a completely different proposition. More on that below.

2. What condition is the timber in?

Look for rot at the base of posts where they meet grade or the sill, insect damage (powder-post beetle and carpenter ant are the usual culprits), and any member that’s checked, split or sagging.

Original framing in a century-old barn has usually moved. Expect to replace more of it than you think — and expect that assessment to require someone who knows old timber, not a general contractor’s opinion from the doorway.

3. Was it built for the loads a house needs?

Agricultural buildings are engineered to lower standards than dwellings. A hay loft designed for distributed storage load isn’t necessarily rated for a bedroom floor. Roof structures built for 1940s snow load assumptions may not meet current code.

Assume you’ll need a structural engineer. For a barn of any age or a pole barn where you no longer have the original drawings, an engineer’s assessment is the only way to know what the frame will carry.

4. What’s the roof doing?

Roof condition tells you a great deal about everything underneath it. A roof that’s been leaking for years means water has been running down posts and into joints, and the damage will be worse than it looks from inside on a dry day.

5. Does zoning allow a dwelling there?

An agricultural building on agricultural land is not automatically convertible to a residence. You may need a change of use, a variance, or in some jurisdictions you may simply not be permitted.

This is a phone call to the county before you do anything else.

6. Where’s the water and waste going?

A barn rarely has a septic system sized for a household, and often has no potable water supply. Percolation test, well, septic design — all of it applies exactly as it would to a new build on raw land, and none of it is cheaper because a building already stands there.

The agricultural exemption stops applying the day you move in

This one catches people in every state we cover, and it’s worth being blunt about.

Most states exempt genuine farm buildings from the building code. That exemption ends the moment the structure contains living quarters. It doesn’t matter that the building has stood for eighty years, that it was legally exempt the entire time, or that the land is still zoned agricultural.

A few examples of how differently this plays out:

• Michigan exempts agricultural buildings from the definitions of “building” and “structure” entirely — but living quarters require residential permits regardless
• Indiana is stricter still: the exemption applies only where the building is used only for agriculture, so any other regular use disqualifies it
• Virginia writes it into the definition — a farm building is “a building or structure not used for residential purposes”
• Wisconsin covers dwellings under its Uniform Dwelling Code but has no statewide code for detached accessory buildings at all

Converting means bringing the building up to full residential code: egress windows in bedrooms, insulation to current standards, compliant electrical and plumbing, fire separation between living space and any attached garage or shop, and stair and ceiling height requirements.

For your state’s specific rules, see our state guides.

Pole barn conversions are a different project entirely

Most guides lump these together, and they shouldn’t.

Converting a modern pole barn — say, fifteen years old, sitting on a concrete slab, with engineered trusses and documented drawings — is a genuinely reasonable project. The structure is sound, the foundation exists, the loads are known, and you’re mainly adding insulation, mechanicals, interior framing and finishes.

Converting a hundred-year-old timber barn is a restoration project that happens to end in a house. Different skills, different budget, different risk profile.

If you’re looking at a pole barn conversion, the things to check are narrower:

• Do you have the original construction drawings? If not, an engineering firm can assess whether the frame handles the added load. Insulation, drywall, mechanicals and interior walls all add weight the building wasn’t necessarily designed for.
• Common faults in older post-frame buildings: metal roof leaks, rotted columns at grade, sagging trusses. All fixable, all cheaper to address before conversion than after.
• Is there a slab, and is it thick enough? Slabs poured for equipment storage aren’t always adequate for residential loads or plumbing runs.
• Column spacing — post-frame columns at 8–10 feet give you a lot of freedom for interior layout, since almost no interior wall needs to be structural.

Our guide to pole barn house construction covers how these buildings are put together, which is worth understanding before you cut into one.

Insulating a converted barn

This deserves its own section because it’s where conversions most often disappoint.

An old barn was built to breathe. Gaps between siding boards, an uninsulated roof, and generous air movement are features in a hay barn and problems in a house. Making one comfortable means creating a continuous thermal and air barrier inside a structure that was designed to have neither.

The two approaches that work:

Closed-cell spray foam applied to the underside of the roof deck and the interior of the walls. It insulates and air-seals in one operation, and it can be applied to irregular surfaces — which matters when nothing in the building is straight.

Interior framing with a new insulated wall built inside the existing structure. More predictable, and it lets you run services in a normal stud bay, but you lose floor area and you have to detail the junction with the old fabric carefully.

Either way, be realistic: you will spend more on insulation in a converted barn than in a new build. Our insulation guide covers the options in detail.

Watch for condensation on any metal roofing or siding you retain. Humid interior air meeting a cold metal panel produces water, and in a conversion you’re introducing humidity — showers, cooking, laundry — to a building that never had it.

What it costs

Conversion costs are harder to estimate than new builds, because the range depends on what you find once you start.

Rough ranges to plan around:

• A sound modern pole barn with a good slab — you’re mostly looking at interior finishing costs, so plan on a similar figure to finishing a new shell.
• An old timber barn needing a foundation — add the lifting and foundation work, structural repairs, and the contingency to cover what you find. It’s common for this to exceed the cost of building new.

The line items that separate conversions from new builds:

Item	Why it costs more in a conversion
Foundation	Lifting an existing structure to pour beneath it, rather than pouring on open ground
Structural repair	Replacing failed timber, sistering members, reinforcing for residential loads
Engineering	Assessment plus design, rather than a stock plan
Insulation	Irregular surfaces, air-sealing a building designed to breathe
Contingency	Budget 20%, not 10%. You cannot fully survey what’s inside a wall until you open it

For new-build comparison figures — cost by size, the full line-item breakdown, and a calculator — see our barndominium cost guide.

When a conversion genuinely makes sense

Not a discouragement — the cases where we’d say go ahead:

• The barn is structurally sound and already has a slab or proper foundation. Most of the risk disappears.
• It’s a modern pole barn. Known loads, documented structure, no restoration work.
• You already own it, on land you already own. Nothing to buy, and the alternative is a building slowly deteriorating.
• The building has genuine character or family history. This is the honest reason most good conversions happen, and it’s a perfectly good one. Just go in knowing you’re paying for the character rather than saving money.
• Local rules favour it. In some jurisdictions converting an existing structure faces fewer hurdles than putting up a new dwelling.

And the cases where we’d suggest building new instead: no foundation, significant rot, unknown structure, a tight budget, or a barn that’s honestly more sentimental idea than sound building. Barndominium floor plans will get you the same look for less money and less risk.

What are the Benefits of Converted Barn Homes?

• Rural charm. If you love all things bucolic, you will love the rustic look and feel of a converted barn house. The fact that the home was previously an actual working barn also adds authenticity.

• Spacious, open floor plans. The space inside a barn is wide open, so if you want, you can keep that layout. You will appreciate how airy it is inside your home and how interconnected your living spaces are.

• Flexibility. If you want, you can always partition the space inside a converted barn home, creating more privacy and a stronger division between rooms and their uses. In fact, a converted barn can even make a great shop house.

• Increased property values. If you already own the land the barn is located on, just by converting it, you can raise the value of the property. If you have another home on the land, you could always convert the barn to serve as a workshop, man cave, guest house, or so forth.

• Eco-friendly. There is no reason to let a structure fall into disrepair when you can improve it and give it many years of additional life. Just by making the decision to convert an old barn instead of neglect it, you are reducing waste and being environmentally-friendly.

• Spectacular views. Barns usually are located in rural areas, which means that their surroundings are often picturesque, unobstructed by city life. When you convert a barn, you can take advantage of the tall sides and the open floor plans to put in huge windows to look out on those views. As a bonus, this also brings in tons of natural light. Having that natural light might even reduce your energy bills during the day.

• Honor the history and spirit of a place. The barn you are converting may have stood on the property for decades. It could have a rich history behind it, as could the land itself. By now, the barn may feel like part of the landscape—like it belongs to the land. Converting it into a home is a wonderful way to respect that connection. And if by any chance you inherited the land and your forebears were farmers, you are also honoring their agrarian tradition by retaining and upgrading the barn.

5 Beautiful Barn Home Conversions to Inspire You

Now the inspiring part. These are all real projects, and they’re worth looking at closely for what they solved as much as how they look.

1. Canyon Barn by mwworks

Among the Cascades in Cashmere, Washington is the Canyon Barn by Seattle-based firm mwworks.

The barn dated back to the “turn of the century” (we presume the 20^th). The architect used materials from the site itself wherever possible in refurbishing the barn and transforming it into a liveable space.

Other materials came from salvage yards.

Ultimately, the 3,875 square foot structure won an AIA Honor Awards for Washington 2013 Merit Award. The look is largely rustic thanks to the use of salvaged materials and some old-fashioned furnishings, but the open layout does contribute a hint of modernity.

Project Brief:  https://www.mwworks.com/canyon-barn

2. Modern Barn Conversion

Here is a striking barn home conversion by Specht Architects, commissioned by a couple to serve as their weekend retreat in Wilton, Connecticut. The property used to be a dairy farm. After a fire damaged the barn, the couple wanted to repair it and turn it into a liveable space.

The process of converting the barn involved making some structural changes to the space.

The architects write, “We restored the exterior volumes of the barn and silo to remain contextual with the other farm buildings on the site. At the same time, the design team radically restructured the interior of the barn, removing the entire second floor and adding exterior buttresses to create a free volume within. What was formerly the lower level of the barn is now the main social space of the house.”

The outside of the barn home still looks quite traditional, as was the plan. But stepping inside, the space is entirely modern. Specht Architects writes, “Simple and durable, yet elegant materials such as polished concrete, second-grade oak flooring, and maple plywood are used throughout. Interior and exterior connect visually through a wall of glass doors to the garden and fields beyond.”

In the main living area, you will notice some interesting architectural choices. The structure features a cathedral ceiling, but a set of slats runs horizontally across the ceiling at a lower level. So, the interior has a feeling of openness and airiness, but at the same time, the vertical space is not overwhelming.

What is also intriguing is the placement of the master bedroom. It is located inside that wood and glass “cube” that is in the middle of the main living space. Underneath the cube is the kitchen. So, the cooking space features a significantly lower ceiling than the main living/dining area.

The bedroom itself has a simple, elegant look. The wall is recessed behind the bed and above, where the slats add interest. A row of windows offers a view to the outdoors—and of course it is possible to look through the glass on the other side down into the rest of the home.

Something else we like is the metal piping forming the chimney for the fireplace. It extends up through the slats, drawing the eye upward to the full ceiling’s height. While the slats keep most of the focus down on the levels of the kitchen and bedroom, it is cool how the chimney serves as a continuous reminder of the vertical openness of the space.

Project Brief:  https://spechtarchitects.com/work/modern-barn/

3. Quebec Barn Transformation

Here you see a century-old barn that was converted into a lovely home for a couple in Quebec by La Firme. Originally, they actually just wanted the barn to serve as a guesthouse. But when they saw the result, they realized they wanted to live in it themselves full-time.

On its website, La Firme refers to the home as a “pastoral symphony” (in translation). The interior features a blend of open and closed spaces, offering the ideal balance of communal and private living. Large windows bring in natural light and offer incredible views of the rural surroundings. Exposed wood beams contrast with white interior siding to draw emphasis to the structure of the barn.

Fascinatingly, the barn originally was standing on another part of the property. The firm took it apart and then rebuilt it in a better spot. The goal, however, was for it to still be the same barn to as large a degree as possible. So, the team numbered all the hemlock siding pieces, noting where they belonged. When they rebuilt the structure, they put the pieces back where they came from.

We can characterize the interior style as “modern farmhouse.” Mixed in with the rustic elements are some modern touches, including light green cabinets and stainless steel appliances (these actually give us almost mid century vibes).

Project Brief:  https://www.dezeen.com/2019/11/20/la-firme-the-shed-house-quebec/

4. Preston Scott Cohen 1800s Barn House

Another beautiful example of a barn with living quarters is this property belonging to Arnold P. and Elise Simon Goodman and designed by architect Preston Scott Cohen.

The home is situated on 164 acres of land. From its elevated location, it offers splendid views of the surrounding fields and trees.

Prior to buying the land, the clients had stayed in a converted barn home. They loved the experience, and wanted something like that for themselves.

Similar to the Quebec barn transformation project above, this one involved disassembling an existing barn and then rebuilding it on the site.

To Cohen, preserving the character and values of the barn while merging old and new was important. He explained that buildings such as barns “establish conventions that are rooted in social practices we can understand. Contemporary architecture can elaborate on that, so that the new is brought into a dialogue that has collective values embedded in it.”

The exterior of the structure features narrow cedar planks in gray. 48 windows in assorted shapes and sizes are dispersed in an unlikely configuration around the barn. Cohen noted the  “free facade makes it impossible to identify how many levels there are, or even to tell the difference between a door and a window.”

As for the interior, it is characterized by wide open space, white walls, and contrasting exposed timbers. Cohen expressed it as a “pure tectonic experience of architecture.” You can read more about what he has to say in the linked article by Marc Kristal.

Project Brief:  http://prestonscottcohen.com/project12.html

5. Hamptons Weekend House

The house you see here is actually barn-inspired, rather than being a converted barn itself. But some of the materials in the home were reclaimed from an actual barn.

Owners Vincent Herbert and Laurence Verbeke purchased the house in Remsenburg, New York. Their friend, Francis D’Haene, happened to be an architect. The couple wanted their home to have a more minimalist vibe, so D’Haene set about transforming the barn-inspired home to suit their vision.

Originally, the home’s siding consisted of cedar planks. Since they were in poor condition, they replaced them. The siding on the home today came from a real 200-year-old barn in Canada. D’Haene also redid the home’s interior, replacing existing materials with more interesting ones and simplifying and streamlining the spaces to capture a modern minimalist look. White is the predominant color with red and pink as prominent accent colors.

Move Into Your Own Converted Barn House

Do you want to move into a barn home of your own? You can check listings for barn homes for sale, or even shop for a barn to convert yourself.

You also could consider building a barn-inspired home from the ground up.

Project Brief:  https://www.architecturaldigest.com/story/francis-dhaene-hamptons-home-article

Frequently asked questions

Is it cheaper to convert a barn than to build a new one? Usually not. The structure is the cheapest part of any build, and an old barn typically needs a new foundation, structural repair, and expensive insulation work to become a legal dwelling. A sound modern pole barn on a slab is the exception — that can be genuinely cost-effective.

Can I live in a barn on agricultural land? Only if zoning permits a dwelling there and the building meets residential code. Agricultural exemptions that kept the barn outside the building code stop applying the moment it contains living quarters, in every state we’ve looked at. Check with your county before committing.

Do I need a structural engineer? For almost any conversion, yes. Agricultural buildings are engineered to lower standards than dwellings, and if the original drawings are lost — which is normal for older barns — an engineer’s assessment is the only reliable way to know what the frame will carry.

Can you convert a pole barn into a barndominium? Yes, and it’s the most practical conversion there is. Check the slab thickness, the trusses, and whether the frame handles the added weight of insulation, drywall and interior framing. Common faults in older post-frame buildings are roof leaks, rotted columns at grade, and sagging trusses.

What about a barn with a dirt floor? Then you’re looking at lifting the structure on jacks and pouring a foundation underneath. It’s done routinely by specialists, it’s expensive, and it often reveals further problems once the building is off the ground. Get a firm quote for this before you commit to anything else.

How long does a barn conversion take? Longer than a new build of the same size, and less predictably. The assessment and design phase alone can run months, and the construction schedule depends on what’s found once work starts.

Will a bank finance a barn conversion? It’s harder than financing a new build. Lenders want to see engineered drawings, a firm scope and a realistic contingency. A renovation or construction loan through a local or regional bank familiar with rural property is usually the route. See our financing guide.

Thinking about a barn home?

Converting a barn you own? Start with a structural engineer’s assessment and a call to your county building department. Those two conversations will tell you whether the project is real.

Want the barn look without the risk? A new build gets you the same aesthetic with known costs and no surprises. Browse barndominium floor plans →

Working out a budget? See our full cost guide →