Iron Crest Remodel

ADU Construction Services in Nampa, Idaho

Iron Crest Remodel is a fully licensed ADU contractor serving Nampa and the broader Treasure Valley area. They handle ADU projects from initial feasibility through final Certificate of Occupancy, managing permits, design, engineering, and construction under one roof.

Nampa is Canyon County's largest city and one of the more active rental markets in the Treasure Valley. As housing costs in Boise and Meridian have risen, Nampa has drawn a growing renter population — including healthcare workers, university students, and manufacturing and logistics employees. This demand makes ADU construction in Nampa a practical investment for many homeowners. A detached backyard cottage in Nampa can typically be built for $30,000–$50,000 less than a comparable unit in Boise or Meridian, while generating an estimated $950–$1,500 per month in rental income.

ADU construction — regardless of budget — involves licensed contractors, city-issued permits, structural engineering, utility connections, and trade inspections. Under Idaho law, any contractor performing work over $2,000 must hold a valid RCE license. An unlicensed contractor cannot legally pull permits in Nampa, and an unpermitted ADU can create title issues, insurance gaps, and potential demolition orders. Iron Crest Remodel holds Idaho RCE License #6681702 and carries $2 million in general liability insurance, along with full workers' compensation coverage.

Nampa ADU Zoning and Permitting

Nampa ADU construction is governed by City of Nampa ordinances under Canyon County jurisdiction — a different regulatory environment than Ada County cities. Idaho's 2023 statewide ADU law applies in Nampa and prohibits cities from requiring owner-occupancy, restricting ADU size below 50% of the primary dwelling, or mandating extra parking within a half-mile of transit. Most single-family homeowners in Nampa have the right to build at least one ADU on their lot, provided local setback and lot coverage requirements are met.

The City of Nampa Building Department reviews ADU applications for compliance with setback requirements, lot coverage limits, height restrictions, and size standards. Nampa's older neighborhoods often feature larger lots than similarly priced subdivisions in Meridian or Boise, which can be an advantage for detached ADU placement. Permit fees in Nampa are generally lower than in Ada County jurisdictions.

Utility connections are also a key consideration. In older Nampa neighborhoods, existing sewer laterals, water service, and electrical panels may need evaluation or upgrades before an ADU can be connected. Iron Crest assesses utility infrastructure as part of every feasibility consultation. They manage all permit applications — building, electrical, plumbing, and mechanical — through to final Certificate of Occupancy.

ADU permits in Nampa are issued by the City of Nampa Building Department. Iron Crest handles the full permit process, including responding to plan review comments and tracking approval status.

ADU Types and Cost Ranges in Nampa

Iron Crest builds several types of accessory dwelling units in Nampa. Below are typical cost ranges for each:

1. Detached Backyard Cottage (Detached ADU): $160,000 – $270,000+. Includes full foundation, framing, utility connections, and interior finish. Nampa's larger older lots make detached cottages particularly practical in historic neighborhoods.
2. Attached In-Law Suite Addition: $110,000 – $185,000. An addition to the existing home with a private entrance, kitchen, bathroom, and living area. Shares some utility connections with the primary home.
3. Garage Conversion ADU (JADU or ADU): $70,000 – $130,000. Converts an existing attached or detached garage into legally permitted living space, including insulation, HVAC, plumbing, electrical, and finish work.

All cost ranges include design, permitting, construction, and utility connections. Iron Crest provides a detailed line-item estimate before any work begins.

Their construction process follows a structured sequence: property assessment and feasibility, design and engineering, permitting, site work and foundation, framing and systems installation, and final inspection. A dedicated project manager oversees each project from start to finish. Iron Crest uses their own trained crews rather than subcontracting projects through lead-generation services.

In addition to the RCE license and insurance coverage, Iron Crest backs their Nampa ADU projects with a 5-year workmanship warranty and a 10-year structural warranty.