Small Barndominium Floor Plans in New Mexico

A small barndominium — roughly 800 to 1,500 square feet on one floor — is the easiest version of the idea to get right in New Mexico, and the easiest to get subtly wrong. The structure is simple at any span a small house needs. What decides whether it works is where it sits: which way the long wall faces, how much snow the local building department designs roofs for, and whether the ground under it stays dry. Those three things change more across New Mexico than the floor plan does.

Start your project

What actually changes with this feature

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

The long wall faces south

A small house has little wall to waste, so orientation does the heating. At Albuquerque's latitude, about 35 degrees north, the noon sun stands only about 31 degrees above the horizon at the winter solstice and about 78 degrees at the summer solstice. A long south wall with most of the glass, and a roof overhang sized to shade that glass in summer but not in winter, lets a compact plan take winter sun deep into the living space. East and west glass is the opposite: low sun in the summer morning and afternoon that no overhang stops.

Roof pitch follows the local snow number

A low-slope metal roof that is ordinary on a small house under Las Cruces's 5 pounds per square foot is a different design under Taos County's 50. Heavier snow means closer purlin or truss spacing, heavier members, and a reason to prefer a steeper pitch that sheds. Rio Rancho's published ground snow load and minimum flat-roof snow load are both 20 pounds, or a case study. Ask the building department for its number before the kit or truss package is ordered, not after.

Keep water away from the footing

The New Mexico Bureau of Geology and Mineral Resources describes collapsible soils as common in New Mexico: loose, dry soils that compact and collapse once they get wet, with housing developments affected from Velarde to Las Cruces and from Alamogordo to Socorro. Its listed causes of the water include septic tanks, leaky water lines, road runoff and roof runoff. On a small barndominium that means gutters or scuppers that carry roof water well away, grading that falls away from the slab, and a soil test on undeveloped land.

Outdoor rooms stretch a small plan

In a dry climate a covered porch or portal is used for much of the year, which makes it the cheapest square footage a small plan can add. A deep porch on the south side doubles as the summer shade for that wall's glass; on the west it blocks the hottest afternoon sun. Under the same roof line as a metal building it is a simple extension of the frame rather than a separate structure.

Same plan, different ground

A small plan in Las Cruces and the same plan in Taos County are designed to different numbers

The floor plan travels; the design criteria do not. The City of Las Cruces publishes a ground snow load of 5 pounds per square foot and a frost line depth of 6 inches in its adopted residential design table. Taos County lists a ground snow load of 50 pounds per square foot and a frost depth of 24 inches below grade. The City of Rio Rancho designs for 20 pounds with an 18-inch frost depth, and the City of Farmington, New Mexico, publishes a 24-inch frost depth. A small post-frame or steel house drawn once has to be checked against the table of the jurisdiction it lands in — roof framing, purlin spacing and footing depth all follow from those numbers — and ten times the snow load is not a detail a plan sheet can ignore.

Common ways to build this

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

One-bedroom with a deep south porch

About 800 sq ft living / 1 bedroom / covered porch along the long side

One open kitchen-living room along the south wall, with the bedroom and bath on the north. The porch runs the full south side and carries the overhang that shades the glass in summer. It suits a single owner, a couple, or a first building on rural land while a larger house is planned.

Two-bedroom compact

About 1,100 sq ft living / 2 bedrooms / 1–2 baths

Two bedrooms on the north side, living space to the south, and a utility room on the side facing the prevailing wind. A simple rectangle with no hallway worth the name keeps the roof one clear span, which keeps the framing simple whatever snow number the local table sets.

Small house plus a bay

About 1,000 sq ft living / 400 sq ft garage or workshop

A compact two-bedroom with a single garage or workshop bay at one end under the same roof. Putting the bay on the side that faces the prevailing wind or the western sun lets the unheated space buffer the house. The wall between them is built as a garage separation wall.

Ways to build this

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

Post-Frame Homes

Post frame and pole barn homes in New Mexico, built as real dwellings: posts set for your soil, termite protection, and a wall that handles heat and cold.

Custom Plans

Custom barndominium plans drawn for your New Mexico parcel: sun, wind and drainage, the look you want, and design values for your site's elevation.

Barndominium Kits

Barndominium kits for New Mexico land: steel or post-frame shell packages drawn to the snow, wind and frost values for your site, delivered to your parcel.

Small Barndominium: common questions

7 common questions about this layout in New Mexico. If yours is not on the list, ask it directly.

Start your project

How small can a barndominium be in New Mexico?

There is no single New Mexico number. Any minimum dwelling size is a zoning rule set by the city or county where the land is, and many rural areas have little zoning. The practical floor is set by what a house needs — a kitchen, a bathroom, a bedroom, and a septic system and water source sized for the household — rather than by the shell, which is simple at any size.

Does a small barndominium need a different roof in the mountains?

It needs to be designed to the local snow load, which varies enormously. The City of Las Cruces publishes a 5-pound ground snow load; Taos County publishes 50. Same floor plan, but different purlin or truss spacing, member sizes and often a steeper pitch. Confirm the figure with the building department for the parcel before ordering a kit or trusses.

Which way should a small barndominium face?

With the long side facing south where the lot allows it. At New Mexico latitudes the winter sun is low enough to reach deep through south glass, and the summer sun high enough that a modest overhang or porch shades it. A plan that puts its windows east and west gets the opposite: hard low sun on summer mornings and afternoons.

Is a slab foundation fine for a small barndominium?

A slab is the usual foundation for a one-story metal or post-frame house, with footings to the depth the local jurisdiction publishes — 6 inches in Las Cruces, 18 in Rio Rancho, 24 in Taos County and Farmington. On undeveloped land, a soil test matters more than the footing depth: the state's Bureau of Geology notes collapsible soils are common and recommends testing where they are suspected.

Can I live in a small barndominium while I build a bigger house?

Whether two dwellings are allowed on one parcel, or whether an accessory building can be lived in during construction, is a local zoning question, and the answers differ between counties and cities. If you might live in it, build it as a dwelling from the start — bedroom egress windows, an insulated envelope and a septic system sized for its bedrooms — so it is legal as a house whatever it becomes later.

Is a small barndominium cheaper per square foot?

Usually not. The water source, the septic system, the electrical service, the driveway and the kitchen and bath cost nearly the same for a small house as a larger one, so they are spread over fewer square feet. A small barndominium costs less in total and more per square foot, which is worth remembering when comparing quotes quoted per square foot.

Can I build a small barndominium myself?

For your own primary residence, New Mexico's Construction Industries Division rules allow a homeowner's permit. The conditions are strict: the owner must complete the major portion of the work, measured by dollar amount; any work subcontracted goes to licensed contractors who pull their own permits and pass their own inspections; and the permit does not cover rental property or commercial work. Otherwise a New Mexico–licensed contractor builds it. Buying a kit does not change which route applies.

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

Start your build survey

Start your plans

Tell us what you want to build and we will draw this for your program, then confirm what it looks like on your parcel and the snow load, wind speed and frost depth your city or county publishes. We draw the plans and supply the kit; a New Mexico–licensed contractor builds it, or you do under a homeowner's permit for your own primary residence. That conversation costs nothing.

Start your project