ADU Contractor in Ketchum, Idaho
Twin Falls ADU Guys serves the Wood River Valley — Ketchum homeowners building in-law suites, guest cottages, or workforce ADUs adjacent to the Sun Valley resort area.
ADU Services in Ketchum
Ketchum sits at the heart of the Wood River Valley, ~95 miles north of Twin Falls and adjacent to the Sun Valley resort. Ketchum has some of the highest property values in Idaho, which makes ADUs especially valuable — as guest accommodation for second-home owners, as in-law suites, and as workforce housing in a market with severe housing constraints. The City of Ketchum Planning & Building Department administers comprehensive design review alongside standard permitting, and we know what they look for.
Permitting in Ketchum
Ketchum (population ~3,500) is under 10,000, so the SB 1354 mandate does not bind it — ADU permissibility is governed by Ketchum's own comprehensive local zoning and design review. Ketchum ADUs frequently command premium rents and increase property values significantly, especially when designed to complement the primary residence per local design standards. Design review is part of the standard permit path here, not an exception. We coordinate it during the Feasibility Check so there are no surprises.
ADU Rules in Ketchum
Local code governsKetchum (population ~3,500) is under the 10,000 SB 1354 threshold, so no statewide law compels it to allow ADUs. ADU permissibility is governed by the City of Ketchum's local zoning code and comprehensive design review — we verify the current requirements for your parcel.
- Zoning authority
- City of Ketchum Planning & Building, 191 5th St West (208-726-7801, planningandbuilding@ketchumidaho.org).
- ADU size limit
- Confirmed during your free Feasibility Check.
- Setbacks
- Confirmed during your free Feasibility Check.
- Permits & fees
- Confirm permit + design-review fees with Planning & Building.
- Owner-occupancy
- Confirmed during your free Feasibility Check.
- Typical 1BR ADU rent
- $1,300-$2,200/month (Sun Valley-area premium; estimate)
What an ADU Can Do for Ketchum Homeowners
ADU Types We Build
- ✓Detached new build ADU
- ✓Garage conversion ADU
- ✓Attached ADU addition
- ✓Pre-fabricated ADU installation
- ✓Basement conversion (where applicable)
Full-Service Includes
- ✓Feasibility assessment + site visit
- ✓Custom ADU design
- ✓All permit applications and coordination
- ✓General contracting + all trades
- ✓Final inspection + Certificate of Occupancy
Idaho ADU Law and Ketchum
Ketchum is under 10,000 population, so the Idaho SB 1354 ADU mandate does not bind it — whether you can build an ADU is governed by the local zoning code. That is exactly what our Feasibility Check verifies for your parcel. (Idaho HB 166 separately protects an internal ADU on an owner-occupied homestead from HOA bans.) Learn more about Idaho ADU law →
How We Build Your ADU in Ketchum
The same proven 4-step process we use across the Magic Valley
Free Readiness Call
10-15 minutes. We learn about your property and goals, and confirm whether a Feasibility Check makes sense.
Feasibility Check ($250-$750)
On-site visit, measurements, zoning verification with your local planning department, utility assessment, and a complete report with budget range.
Design + Permits
We design your ADU to code and handle every permit application with your city and county building department.
Construction
Our licensed team handles all trades — framing, plumbing, electrical, HVAC, and finishes. One team, start to finish.
Plan Your ADU in Ketchum
Whether you are just researching or ready to start, here is everything you need to know about building an ADU in Blaine County.
Cost in Ketchum
ADU pricing for Blaine County — garage conversion vs detached vs prefab, with hidden costs explained.
Permits in Ketchum
How we handle the full permit process — Zoning Use Permit, building permits, trade permits, inspections.
Financing Options
HELOC, construction loans, cash-out refinance, FHA — how Ketchum homeowners pay for their ADU.
Idaho ADU Law
HB 166, HOA rules, the 45% size rule — what state and local law actually requires.
Also Serving Near Ketchum
We serve all of Blaine County and surrounding communities. If you are near Ketchum, we can help — contact us to confirm availability for your specific location.
Ready to Build an ADU in Ketchum?
Start with a free 10-15 minute Readiness Call. We'll assess your property, walk through the local permit process, and tell you exactly what's possible.