Tiny homes in Boise, Idaho — THOW-as-ADU zoning under the Modern Zoning Code, parking rules, builder costs, and what to know before buying or building.
Last researched June 2026
Boise pairs a four-season high-desert climate — hot, dry summers and cold winters with light valley snow — with outdoor access few state capitals match: the Boise River Greenbelt runs 25 miles through town, and the Ridge to Rivers trail system climbs straight out of the Foothills neighborhoods. Tiny home dwellers gravitate to the North End and the Boise Bench for walkable streets and alley-loaded lots suited to backyard units, while neighboring Garden City's live-work zoning along the river has long been a haven for unconventional housing. Winters demand four-season insulation and skirting for a THOW, but the payoff is skiing at Bogus Basin 16 miles from downtown. The city's 2025 THOW-as-ADU reform has made Boise one of the Mountain West's more practical places to actually live tiny.
Boise regulates foundation-built tiny homes and tiny homes on wheels (THOWs) along two separate tracks. Foundation builds fall under the city's adoption of IRC Appendix Q, which covers houses of 400 square feet or less, and the city has published Tiny House Pocket Neighborhood standards for clustered small-home projects. A THOW, by contrast, is classified by the State of Idaho as a recreational vehicle registered through the Idaho Transportation Department and built to the NFPA 1192 RV standard — but as of July 1, 2025, Boise's Modern Zoning Code allows a certified THOW to be sited as an accessory dwelling on a residential lot, one of the more permissive THOW frameworks in the Mountain West.
Under the residential use standards at Section 11-06-03 of the Boise zoning code, a THOW used as an accessory dwelling must be under 400 square feet, certified to the NOAH+ standard (or another city-approved third-party standard), located behind an existing permitted single-family home, kept at least 6 feet from other structures, and connected to city water and sewer — typically through the primary home's service (as of June 2026). A lot may hold up to two accessory residential units in any combination of ADUs and THOWs. In March 2026 the City Council approved a further round of zoning-code edits loosening ADU regulations (per BoiseDev, March 11, 2026).
At the state level, Idaho SB 1354 — signed in 2026 and effective July 1, 2026 — eliminates city-imposed owner-occupancy requirements for ADUs, with cities given until February 1, 2027 to conform their codes; existing HOA covenants are not overridden. Verify current requirements with your local planning department before purchasing land or beginning construction.
Verify current requirements with your local planning department.
Boise permits detached, attached, and above-garage ADUs on residential lots. As of June 2026, an ADU may not exceed 10 percent of the lot area or 700 square feet (whichever is smaller), may have at most two bedrooms, must remain smaller than the primary residence, and must match single-family residential character; a lot may contain up to two accessory units in any combination of conventional ADUs and certified tiny homes on wheels (per the City of Boise ADU quick guide and Section 11-06-03 of the zoning code). The City Council approved additional ADU deregulation in its March 2026 zoning-code update (per BoiseDev, March 11, 2026). Statewide, Idaho SB 1354 takes effect July 1, 2026 and bars cities from imposing owner-occupancy requirements on ADU properties; Boise has until February 1, 2027 to align its code. The law does not override HOA covenants recorded against a property.
Communities, RV parks, and parking options in and near Boise.
The most reliable legal path for full-time THOW living in Boise is the backyard accessory-dwelling route opened on July 1, 2025: a NOAH+-certified (or equivalently certified) THOW under 400 square feet placed behind a permitted single-family home and connected to city utilities, per Section 11-06-03 of the zoning code (as of June 2026). Outside that route, Idaho treats THOWs as RVs registered through the Idaho Transportation Department, and long-term RV occupancy on a residential lot without an approved accessory use is not a permitted permanent arrangement. RV-park options close in are limited and house rules vary: Boise Riverside RV Park in neighboring Garden City offers monthly long-term sites with full hookups but explicitly does not allow tiny homes in the park (per its published rates page, as of June 2026), so confirm tiny-home acceptance in writing before towing in. Garden City itself permits tiny homes classified as RVs within designated RV parks and as ADUs on residential lots. Dedicated tiny-home communities sit farther out — Valley Village RV Park in Irwin (eastern Idaho) and Tiny House Estates in Bonner County (North Idaho) are the closest named options confirmed by public reporting as of June 2026.
tiny-home-village
Meridian, ID (~25 min west of Boise, Victory Rd & Meridian Rd)
Proposed 134-home small-footprint rental community by Alpha Development Group, with one- to three-bedroom units of roughly 650–1,290 sq ft (per BoiseDev, August 2022; build-out status unconfirmed as of June 2026).
tiny-home-village
Bonner County, ID (~7 hrs north of Boise)
Purpose-built tiny home community offering lot leases with shared amenities; one of the few verified tiny-home neighborhoods in Idaho (per public reporting, last confirmed June 2026).
rv-park
Irwin, ID (~4.5 hrs east of Boise, near Swan Valley)
RV park known for welcoming tiny homes on wheels for legal, affordable long-term siting (per public reporting, last confirmed June 2026).
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.
Service areas: washington, oregon, california, montana, idaho
Boise, Idaho
Custom stick-built ADU and tiny home builder serving the Treasure Valley (Boise area), constructing all units on-site to avoid delivery and craning costs. Founded by Robert Perkins, who brings extensive residential construction experience to every project.
Service areas: Idaho, Treasure Valley
Spokane, Washington
Spokane franchisee of Anchored Tiny Homes, the only national ADU franchise, opened in 2024 by local entrepreneur Matt Goodwin. Builds stick-framed detached and attached ADUs ranging from 240 to 1,200 sq ft across the Inland Northwest. As of May 2026, pricing runs $90,000–$200,000 depending on size and finishes.
Service areas: Washington, Idaho
Hailey, Idaho
NOAH-certified tiny home builder in Hailey, Idaho, specializing in high-performance modular homes designed for mountain living. Builds tiny houses on wheels, backyard ADUs, and smaller foundation homes meeting ANSI building standards.
Service areas: Idaho
Spokane, Washington
Spokane-based custom ADU builder co-founded by Rob Wuls. Designs and constructs accessory dwelling units on-site in the Spokane and North Idaho region, handling permits, design, and build from start to finish. As of May 2026, units range from 300–1,000 sq ft and pricing from $115,000 into the low $200,000s.
Service areas: Washington, Idaho
Spirit Lake, Idaho
THIA-certified tiny home and general contractor in Spirit Lake, North Idaho, building compact dwellings of 100–400 sq ft following IRC Appendix Q standards. BBB Accredited since 2018 with a 4.9-star HomeAdvisor rating.
Service areas: Idaho, North Idaho
A comparison between tiny-home living and conventional homeownership in Boise.
Tiny home path
Traditional home path
Potential monthly savings
$1,900–$2,500/mo
Source: Zillow Boise market data, April 2026
Verified links for planning, permitting, and community connections in Boise.
Official
Directory
Yes, as an accessory dwelling. Since July 1, 2025, Boise's zoning code (Section 11-06-03) allows a THOW under 400 sq ft behind an existing single-family home if it is NOAH+ certified (or meets another city-approved standard) and connects to city water and sewer (as of June 2026). It cannot be the primary dwelling on the lot.
Yes. Foundation-built ADUs are capped at 700 sq ft or 10% of lot area (whichever is smaller) with a maximum of two bedrooms, and a lot may hold up to two accessory units in any mix of ADUs and certified THOWs (as of June 2026). Permits run through Boise Planning and Development Services.
Idaho builders ranged roughly $30,000–$110,000 in 2026 depending on size and finish. Boise-area builders include Snake River Tiny Homes (Idaho Falls, models starting under $90,000) and Tiny Idahomes (Caldwell custom THOWs), per builder-published pricing as of June 2026.
Boise adopts IRC Appendix Q for foundation tiny houses, covering homes of 400 sq ft or less (excluding lofts); THOWs used as accessory dwellings must also stay under 400 sq ft (as of June 2026). There is no separate citywide minimum beyond standard building-code habitability requirements.
Idaho SB 1354, effective July 1, 2026, eliminates city owner-occupancy mandates for ADUs statewide; cities have until February 1, 2027 to update local codes. HOA covenants recorded against a property still apply (as of June 2026).
Guides, zoning explainers, and financing articles related to this state.
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A state-by-state overview of tiny home zoning laws, covering the most friendly and most restrictive states for THOW and foundation tiny home placement.