Barndominium vs. Stick-Built Home in Spokane County (2026): Codes, Permits, Snow Loads, Energy Code, Financing and Insurance

Short answer: in Spokane County, a barndominium and a stick-built house follow the same rules once someone lives in it. Both are permitted as a single-family dwelling under Washington's residential code, both have to meet the Washington State Energy Code, and both are designed for your parcel's snow load and a 24-inch frost depth. The real differences are in the frame, the insulation details, the appraisal and the insurance. Here's how each one compares, and when a barndo is worth it.

Same code, same permit: a barndo is a house

Washington adopts the International Residential Code (IRC) statewide through WAC 51-51, currently the 2021 edition. The same section says the energy code is regulated separately by chapter 51-11R WAC, the Washington State Energy Code-Residential (WSEC-R). The 2021 WSEC-R took effect in every Washington city and county on March 15, 2024, and it calls itself the maximum and minimum energy code for residential construction.

In practice:

• A barndo with a living space is permitted as a single-family dwelling, not as a shop or ag building
• Spokane County enforces the 2021 IRC and the Washington State Energy Code in unincorporated areas, along with the other 2021 codes
• Steel siding doesn't change the rules. Egress windows, smoke and carbon monoxide alarms, whole-house ventilation, stairs, guards and energy credits all apply the same way they would in a stick-built house

The Spokane County permit process for either one

Spokane County's residential permit handout (BP-06) lists the same submittal package for any new home:

• Site plan with property lines, setbacks, the driveway and access, septic or sewer, wells, easements, cut and fill, and erosion control
• Foundation plan with footing and reinforcement details
• Floor plan, elevations and cross sections
• Energy compliance forms with your energy credit options, glazing schedule, heating system sizing and ventilation checklist
• Structural engineering where it applies. The County's table specifically notes this includes pole buildings
• Truss package and beam calcs where they apply

A few other Spokane County items catch people off guard:

• Radon: Spokane County is one of six Washington counties that require radon mitigation in new homes and residential additions. A barndo needs it just like a stick-built house
• Electrical permits come from the Washington State Department of Labor & Industries, not the County
• Permits expire 3 years from issuance, with one extension of up to 180 days at the director's discretion

Building inside a city is different. In Medical Lake, for example, the City's R-1 zone requires a 3/12 minimum roof pitch with 6-inch minimum eaves, a 24-foot minimum building width and 800 sq ft minimum ground-floor living space, plus stamped architect or engineer plans. Check your city's zoning before you pick a building shape.

Snow load and frost depth: same numbers, different frames

Your parcel sets the loads, not the building type:

• Ground snow load: Spokane County's design criteria start at 39 psf, with a 30 psf basic minimum roof snow load. The County says some areas reach 150 psf, and it publishes the snow load for each parcel on its SCOUT map
• Frost depth: footings go at least 24 inches below finished grade under the City of Spokane / Spokane County joint policy (BUILD-07)
• Wind: 110 mph in the County's design criteria table

How each frame carries that load:

• Stick-built: wood walls, engineered roof trusses and continuous footings. The IRC's prescriptive tables cover much of it, and the truss package is engineered
• Post-frame (pole barn style): wood posts set on footings or embedded, with trusses on top. The County lists structural engineering for pole buildings, so plan on it for a post-frame home
• Steel frame (PEMB, "red iron"): the manufacturer engineers the frame for your snow load, wind and spans, and the column reactions set the size of the concrete footings. That gives you wide clear spans for a big shop bay next to the living space

Raven isn't tied to one PEMB manufacturer. We source the steel from whichever has the fastest delivery for your design, which can take weeks off a build. Our steel building lead time guide walks through a real timeline.

Energy code, insulation and condensation

This is where a barndo and a stick-built house differ the most in practice.

• Same energy targets: heated living space in a barndo has to meet the WSEC-R, the same as a stick-built home. Your design team picks the energy credit options and shows them on the plans
• Different wall build: a stick-built wall fills the stud cavity with insulation and adds sheathing and housewrap. A steel-frame or post-frame wall usually needs framed-in walls or continuous insulation inside the steel skin to hit the same numbers
• Condensation: steel panels get cold fast in a Spokane winter, and warm, moist indoor air will condense on them if it reaches the metal. An air barrier and the right vapor control matter more in a barndo than in a typical stick-built house
• Shop and house as separate zones: an unheated shop bay and a heated living area need a clear thermal line between them

Our metal building insulation guide covers the energy code and condensation in detail.

Financing and appraisal: comparable sales matter

Most mortgages are underwritten against an appraisal, and that's where a barndo can be harder than a stick-built house. Fannie Mae's Selling Guide doesn't ban unique homes. It says:

• Unique or nontraditional housing is eligible as long as the appraiser has enough information to develop a reliable opinion of market value
• The comparables don't have to be the same design,
• The appraiser can use older sales, sales from competing neighborhoods and other market data to show the home is marketable
• If there's no evidence of market acceptance and the property is too different to value reliably, it isn't acceptable as security for a loan sold to Fannie Mae
• At least three closed comparable sales are required, and for rural properties the appraiser can use comparables that are a considerable distance away if they explain why
• Large outbuildings like big barns may lead the lender to ask whether the property is residential or agricultural

What that means for you:

• Talk to your lender before you design. Ask whether they've financed barndominiums in your area and how they handle construction-to-permanent loans
• Design for the market, with a conventional bedroom and bathroom count and a floor plan that reads like a house
• Keep the house and shop areas clearly separated on the plans so the appraiser can measure and value each one

Insurance: insure to rebuild, not to the sale price

Washington's Office of the Insurance Commissioner points out that replacement cost coverage only pays up to the limit on your declarations page. After the 2023 Gray and Oregon Road wildfires, which included homes around Medical Lake, the OIC found that two-thirds of the people who lost their homes were underinsured.

For a barndo or a stick-built house:

• Tell your agent exactly how it's built: steel frame, post-frame or wood, along with the square footage of the living space and the shop
• Ask about inflation guard and extended replacement cost endorsements, and review your limits every year
• Know the gaps: standard homeowner policies don't cover flood, earthquake, sewer backup, land movement, or the cost of meeting new building codes. Ask your agent about separate coverage for these

When a barndominium makes sense

A barndo is often worth it when:

• You want a large shop, RV bay or equipment storage under the same roof as the house
• You're on acreage where the County, not a city, sets the rules, and a big building fits the land
• You value a wide clear span, which a steel frame handles well
• You've confirmed financing with a lender who's comfortable with the property type

A stick-built home may be the better choice when:

• You're in a city subdivision with zoning or covenants that favor a conventional look
• Resale to the widest pool of buyers is your top priority
• You don't need the shop space that makes a barndo appealing

What it costs

Raven's installed rate for a pre-engineered metal building or a pole building is about $60 to $75 per sq ft. That's for the building, and electrical, plumbing and utility hookups are extra. It is not the price of a finished home. Interior framing, insulation, finishes, kitchens, bathrooms, mechanical systems, septic or sewer, a well and site work all add to that, so we quote finished barndominiums per project.

Plan your barndo with Raven

Start with our 12-step steel-frame barndominium pre-build checklist. It covers land, septic, water, snow load and permits in order. If you're still deciding on the frame, see red iron vs. pole barn. Raven also pours the slab and foundations, so one crew handles the steel building, pole building and concrete work.

Get a barndominium quote

Call 509-350-2016 or request a free quote with your parcel address, the size of the living space and shop, and whether you're leaning toward steel or post-frame. We'll check your snow load and give you a written quote.

Sources

• Building pricing: Raven Buildings' current installed rate for the Spokane area
• WAC 51-51-003, Washington's adoption of the International Residential Code
• WAC 51-11R-10100, Washington State Energy Code-Residential scope and effective date
• Spokane County Building FAQ (codes in effect, snow load, radon, electrical permits, permit expiration)
• Spokane County BP-06 Residential Building Permits (design criteria and submittal requirements)
• Spokane County SCOUT map, snow-load layer
• City of Spokane / Spokane County Joint Policy BUILD-07, Official Frost Depth
• City of Medical Lake, Building Permit Application Information for a New Single Family Residence
• Fannie Mae Selling Guide B4-1.3-05, Improvements Section of the Appraisal Report (unique housing types, outbuildings)
• Fannie Mae Selling Guide B4-1.3-08, Comparable Sales
• Washington Office of the Insurance Commissioner, The risk of being underinsured