Idaho Just Changed What You Can Build.
Idaho changed what you can build. Here's what your city will actually permit today. Antova designs and builds fully engineered ADUs, start to finish.
Applies to Idaho cities over 10,000 — including Coeur d'Alene and Post Falls. Smaller towns and county land follow different rules.
The New Law,
In Plain English.
Senate Bill 1354 took effect July 1, 2026. Cities over 10,000 — including Coeur d'Alene and Post Falls — have until February 1, 2027 to update their local codes. The city permits against its own code until it updates. Here's where that leaves you today:
One ADU per lot — internal or detached — not both as a state right
Up to 800 sq ft under current Coeur d'Alene code — State law raises the protected size once the city updates its code
No extra parking required — in most cases
The new law limits what HOAs can restrict — existing covenants are still being tested in court — we'll confirm your specific situation in your free consultation
Own county land or live in a smaller town? Different rules apply — we'll confirm exactly what your property allows in your free consultation.
Idaho Senate Bill 1354, effective July 1, 2026, codified at Idaho Code § 67-6541.
Free feasibility check · No commitment · No obligation
Permitted size by city
Coeur d'Alene
Up to 800 sq ft
or 75% of the primary home, whichever is smaller — under current city code.
Post Falls
Up to 1,000 sq ft
or 50% of the primary home, whichever is smaller — under current city code.
These limits change once each city updates its local code, expected February 2027. State law raises the protected size once the city updates — we confirm every lot with the city in writing before plans are submitted.
Inside a Finished ADU
A completed Antova ADU — Coeur d'Alene, Idaho
Built Like Everything We Build: Engineered First.
An ADU is a real house — foundation, structure, plumbing, roof. Not a shed with drywall. We bring the same team of engineers and problem solvers that handles our structural work to every ADU: engineered plans, permits handled, built to last. One team, start to finish.
One Lot. Two Incomes. More Options.
Rental Income
A legal, self-contained unit in the Coeur d'Alene market pays for itself. Turn your rear yard into a revenue-generating asset under the new law.
Family Close By
Aging parents nearby, adult kids with their own space — an ADU keeps family close without compromising anyone's independence.
Property Value
A second dwelling changes what your property is worth and who it appeals to. It's the highest-ROI improvement most homeowners can make right now.
Three Steps to Your ADU
Free Feasibility Check
We confirm what your lot and city allow under the new law.
Design + Engineering
Plans drawn, permits filed, price locked before we break ground.
We Build It
Fixed timeline, full visibility, done right.
Before You Decide
Your Lot Is Worth More Than It Was Last Month.
Find out what you can build.
Add your email to get a copy of your feasibility summary in writing.
Free consultation · No commitment · Results within 1 business day
Or call (208) 625-8342