Build Your ADU

With your permit in hand, construction can begin. Here's what to expect during the build phase — and how to set your project up for success.

Hiring the right contractor

RogueADU does not currently maintain a vetted contractor list. The resources below can help you find and evaluate contractors. Always verify licenses, insurance, and references.

  • Verify Oregon CCB license

    All Oregon contractors must be licensed with the Oregon Construction Contractors Board (CCB). Verify any contractor's license before signing a contract.

    Oregon CCB License Lookup →

  • Get three bids

    For a project of this size, get at least three written bids. Make sure each bid covers the same scope of work so you can compare apples to apples.

  • Check references

    Ask for references from recent ADU or addition projects in the Rogue Valley. Visit completed projects if possible.

  • Review the contract carefully

    Your contract should specify scope, schedule, payment milestones, change order procedures, and warranty terms. Consider having an attorney review it.

Construction phases for a typical ADU

  1. Site preparation

    1–2 weeks

    Grading, excavation, utility trenching, and foundation preparation.

  2. Foundation

    2–4 weeks

    Concrete work, inspection, and curing time.

  3. Framing and rough-in

    4–8 weeks

    Structural framing, roofing, windows, and rough mechanical/electrical/plumbing. Multiple inspections required.

  4. Insulation and drywall

    2–4 weeks

    Insulation inspection, drywall installation, and finishing.

  5. Finishes and final inspection

    4–8 weeks

    Flooring, cabinets, fixtures, paint, landscaping, and final City inspection. Certificate of Occupancy issued.

Total construction time for a new detached ADU: typically 6–12 months from permit issuance.

Tips for a smooth build

  • Communicate in writing

    Document all decisions, change orders, and approvals in writing. Email is fine. This protects both you and your contractor.

  • Stay on top of inspections

    Inspections must happen at the right time. Work with your contractor to schedule them promptly — delays cost money.

  • Budget for surprises

    Even well-planned projects encounter unexpected conditions. Keep 10–15% of your budget in reserve.

Construction complete? Time to rent.

Once you have your Certificate of Occupancy, your ADU is ready to rent.

Learn About Renting Your ADU →