Get Started with Your ADU
Ashland homeowners can build an ADU on most residential lots — no special permit, no discretionary review. Here's what you need to know to get started.
Three types of ADUs in Ashland
- Detached ADUA separate structure in the backyard or side yard — the most common type. Can be new construction or a converted garage or outbuilding.
- Attached ADUAn addition to the primary home that shares at least one wall. Requires a separate entrance.
- Interior ADUA self-contained unit carved out of existing interior space — a basement, attic, or converted room with its own entrance.
Is an ADU right for you?
Rental income
Ashland's rental market is tight. A well-located ADU can generate $1,200–$2,000/month, helping offset your mortgage or fund retirement.
Family housing
Keep aging parents or adult children close while maintaining privacy. An ADU provides independence without the cost of a separate property.
Home office or studio
A detached ADU makes an excellent dedicated workspace, art studio, or guest suite — separate from the main home but on your property.
Long-term property value
ADUs add square footage and income potential. In Ashland's constrained housing market, a permitted ADU is a meaningful asset.
The City of Ashland's 9-step ADU process
This is the official process outlined by the City of Ashland Community Development Department. Each step links to the relevant City resource.
Assess your property
Evaluate your property for potential ADU locations. Consider zoning, setbacks, existing infrastructure (water, sewer, electric), vehicular and pedestrian access, physical constraints (trees, riparian areas, floodplains, steep slopes), existing structure locations, and potential conversion of existing floor areas.
Determine your goals
Define the purpose of your ADU — rental income, housing a family member, or another purpose. Your goal shapes design decisions: layout, amenities, accessibility features.
Design your ADU
The City offers seven free pre-approved plan sets that meet local building codes. If these don't fit your needs, work with an architect or designer who understands Ashland's regulations and the State Building Code.
Budget and financing
Construction costs typically range from ~$150/sq ft for conversions to $250–$500/sq ft for new construction. Once you have a budget, consider financing options: savings, HELOC, cash-out refinance, or construction/renovation loans.
Construction
Unless you're personally experienced in construction, hire a licensed and reputable general contractor. A professional ensures your ADU is built to approved plans and local building codes.
Utilities and infrastructure
Coordinate with utility providers (electric, gas, water, sewer) to connect your ADU. Ashland requires a separate electric meter. Ensure compliance with utility connection requirements, including any code mandates for separation of utilities between the primary residence and the ADU.
Landscaping and access
Create a landscape plan that addresses fuel clearance areas for fire safety, trees to be retained or removed, gardens, green spaces, accessible pathways, hardscaping, and patios.
Submit for permits
Submit your plans to the City Building Department. They'll review your application, calculate building and SDC fees, and check compliance with building codes and zoning. Once approved, they'll issue a building permit.
Inspections and Certificate of Occupancy
Schedule inspections at key construction milestones. Once construction is complete and all inspections pass, you'll receive a Certificate of Occupancy — your ADU is ready to use.
Source: City of Ashland Community Development Department, ashlandoregon.gov/1077
Download the ADU Program Guide (PDF) →Ready to check your property?
The next step is a quick property check — zoning, lot size, setbacks, and utility capacity. Most of it is free and takes about 15 minutes.