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Tiny Homes in Helena, Montana
Tiny homes in Helena, Montana — zoning rules, THOW parking, builder costs, and what you need to know before buying.
Last researched April 2026
$85,000 – $180,000
Builder cost range
6
Builders serving area
34,425
Population
Friendly
Tiny-home friendliness
Why Helena
Helena is Montana's state capital, a city of around 34,000 in a mountain valley between the Big Belt and Elkhorn ranges. The economy is anchored by state government, healthcare, and professional services, producing a stable job market and a smaller-city feel than Bozeman or Missoula. Median home prices were around $445,000–$462,000 in early 2026 — squarely mid-market for Montana. Helena's historic downtown and mansion district bring historic-preservation overlays that can influence ADU design, but surrounding neighborhoods and the Helena Valley are well suited to tiny homes and detached ADUs. Tiny home buyers are drawn by government-sector job stability, immediate outdoor access (Mount Helena City Park, the Big Belts, Missouri River reservoirs), and moderate housing costs relative to western Montana.
Zoning & Placement
Helena, Montana's state capital and the seat of Lewis and Clark County, applies all statewide Montana housing rules. Appendix Q of the IRC (adopted statewide December 7, 2019) makes foundation tiny homes of 400 sq ft or less legal under the state building code. HB 246 (2023) defines tiny dwelling units of 350–750 sq ft on permanent foundations and authorizes dedicated zoning districts. SB 528 (effective January 1, 2024) requires Helena to allow at least one ADU by right on any single-family lot, with no owner-occupancy mandate. SB 532 (2025) removed statewide ADU size caps and added a mandatory 15-day expedited permit review for parcels served by public water and sewer. SB 252 (2025) requires equal zoning treatment of manufactured and factory-built homes. Helena additionally applies historic-preservation standards in designated historic districts, which can shape ADU and tiny home design in central neighborhoods. THOWs are registered with the Montana MVD as travel trailers and are restricted to licensed RV parks for long-term residency. Verify current requirements with your local planning department before purchasing land or beginning construction.
Verify current requirements with your local planning department.
What to verify locally
- • Confirm whether your tiny home will be treated as an ADU, a site-built dwelling, or a recreational vehicle.
- • Ask about utility hookup requirements, especially sewer, electrical service, and emergency-access setbacks.
- • Check whether long-term occupancy is allowed on the lot type you are considering.
- • Verify minimum square footage requirements for your zone classification.
ADU & Backyard Tiny Homes
ADUs are allowed by right on any single-family residential lot in Helena under SB 528 and SB 532. No owner-occupancy requirement. Statewide size caps were removed in 2025; local standards on setbacks, height, parking, and (in historic districts) design still apply. Parcels on public water/sewer are entitled to a 15-day expedited permit review. Detached ADU build cost in Helena typically runs $160,000–$260,000 for a 500–800 sq ft unit, below Bozeman but above Billings and Great Falls.
Where to Park
Communities, RV parks, and parking options in and near Helena.
Helena does not permit full-time THOW residency on standard residential lots. Long-term THOW placement requires a licensed RV park or campground; several options operate in the Helena Valley with monthly rates typically in the $400–$700 range. Lewis and Clark County is more permissive for THOW placement on unincorporated rural parcels, though building code compliance and septic/water requirements still apply.
RV park on Hauser Lake
Kim's Marina & RV Resort
Builders Serving Montana
Wolf Industries
Battle Ground, washington
Battle Ground factory builder producing modular tiny homes, ADUs, and single-family homes. Over 500 homes placed in five years. New 21,000 sq ft factory doubles production capacity to two homes per week.
Modular homes ADU focused Prefab / factory-built IRC compliant
Service areas: washington, oregon, california, montana, idaho
ARCH 406
Billings, Montana
Billings-based design-build firm specializing in high-end custom tiny homes and small-footprint residences. A sister company to Collaborative Design Architects, ARCH 406 offers full architectural design paired with general contracting services. Their Nomad model starts at $68,000 and features R-20+ walls and R-30 roof systems engineered for Montana's harsh winters. As of May 2026, all projects serve the Montana market.
Custom builds Tiny homes
Service areas: Montana
Custom Tiny Homes of Montana
Kalispell, Montana
Kalispell-based builder offering RVIA-certified park model RVs (399 sq ft) and HUD-standard modular cottages (400–1,100 sq ft). Floor plans can be expanded up to 17 feet wide and 72 feet long. Custom Tiny Homes of Montana handles design, build, and delivery throughout Montana and ships nationwide. Site copyright 2026; confirmed active via Facebook page (Tiny Homes of Montana | Kalispell MT).
Park models Prefab / modular
Service areas: Montana, Nationwide
Tiny Homes Montana LLC
Columbia Falls, Montana
Columbia Falls custom THOW builder giving clients complete control over their tiny home design from trailer selection through finishes. Tiny Homes Montana LLC handles design, construction, and delivery of move-in-ready homes on wheels. Pricing runs approximately $325 per square foot; typical builds range from $65,000 to $130,000 depending on size, as of May 2026. Located at 208 Columbia Mountain Drive, Columbia Falls, MT.
THOW Custom builds
Service areas: Montana
Tiny Homes of Spokane
Spokane, washington
Spokane-based park model and tiny home dealer offering RVIA, ANSI 119.5, and L&I certified units. Carries Cavco and Fleetwood models. Delivers throughout the Pacific Northwest including Washington, Idaho, Oregon, and Montana.
Park models RVIA certified ANSI 119.5 certified L&I certified
Service areas: washington, idaho, oregon, montana
Woodland Ridge Tiny Home Crafters
Livingston, Montana
Livingston-based luxury tiny home builder founded in 2020 by Cody Wood and Rick Gilliland. Woodland Ridge designs and builds custom modular homes in their shop, then cranes them onto permanent foundations on the customer's site. Projects include primary residences, workforce housing, and income- generating rentals. Pricing runs $90,000–$150,000 as of May 2026. Member of the Livingston Chamber of Commerce.
Prefab / modular Foundation builds ADU
Service areas: Montana
Costs
A comparison between tiny-home living and conventional homeownership in Helena.
Tiny home path
Builder cost range $85,000 – $180,000
Estimated monthly total
Traditional home path
Median home price $462,000
Estimated monthly total
Potential monthly savings
Resources
Verified links for planning, permitting, and community connections in Helena.
Common Questions
Guides for Montana Buyers
Guides, zoning explainers, and financing articles related to this state.
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