The “usable floor area” is measured based on the interior living space of the ADU, excluding areas like garages, attics, or crawl spaces that are not habitable. The measurement typically includes bedrooms, bathrooms, kitchens, and living areas that meet building code requirements for occupancy. For precise details on how this standard applies to your project, consult the Deschutes County Research Checklist.
ADU FAQ | Bend Oregon
Frequently Asked Questions: Accessory Dwelling Units (ADUs) in Central Oregon
What is an ADU?
An Accessory Dwelling Unit (ADU) is a smaller, self-contained residential unit located on the same property as a primary home. ADUs are often referred to as backyard cottages, granny flats, or in-law suites. These units can be detached, attached, or converted spaces within the main home, like a basement or garage.
Why should I consider building an ADU in Central Oregon?
Building an ADU offers several benefits:
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- Additional Income: Renting out an ADU can provide a steady income stream.
- Housing Flexibility: ADUs can accommodate family members, guests, or serve as a home office.
- Property Value: An ADU can increase your property’s overall value.
- Community Needs: ADUs contribute to addressing housing shortages in Central Oregon.
How do I determine if I can build an ADU on my property?
In Deschutes County, specific zoning regulations apply to ADUs. Generally, properties must meet certain criteria, including minimum lot size and zoning designations. It’s essential to consult the Deschutes County Research Checklist for ADUs to understand the requirements and ensure compliance.
What are the size limitations for an ADU in Deschutes County?
In unincorporated Deschutes County (the rural ADU program), ADUs are capped at 900 sq ft of usable floor area (habitable interior space—garages/decks don’t count). Inside city limits, each city sets its own cap. In Bend, the code allows up to two ADUs: if you build two, one may be up to 800 sq ft and the second is capped at 500 sq ft; if you build only one ADU, it may be up to 800 sq ft. Always confirm which jurisdiction you’re in and verify the current code before you start. However, specific size allowances can vary based on property size and zoning. Refer to the Deschutes County Research Checklist for detailed information.
Do I Need a Builder or Should I Use Bend’s Pre-Approved ADU Plan?
While the City of Bend offers a single pre-approved ADU plan, it’s not the only way to get your project moving. At BuildADU, we’ve developed our own set of ready-to-go designs that meet local code but can also be adapted to your lot and your goals. This means you’re not locked into a one-size-fits-all option—you get the efficiency of a plan that’s been proven to work, plus the flexibility to adjust layouts, finishes, or details so your ADU feels like it belongs on your property.
Can I customize the City’s pre-approved plan?
No—the City doesn’t allow modifications to the pre-approved plan set. If you need layout changes, different windows, or other design shifts, go with a custom plan (or a ready-to-go plan that’s designed to be tailored).
How will the “usable floor area” standard for ADUs be measured?
What is the process for obtaining permits to build an ADU?
The permitting process involves several steps:
- Research and Feasibility: Assess your property’s eligibility and review zoning regulations.
- Design and Planning: Develop architectural plans that comply with local building codes.
- Permit Applications: Submit applications for planning approval, building permits, and any necessary septic or utility permits.
- Construction: Once permits are approved, construction can commence.
It’s advisable to consult with professionals experienced in local regulations to navigate this process efficiently.
Can I rent out my ADU once it’s built?
Yes! ADUs can be rented out, providing additional income. Central Oregon’s vibrant tourism industry and housing demand make ADUs an attractive rental option. However, some cities, like Bend, may have rules about short-term rentals, so it’s essential to check local regulations.
Do I need separate utility connections for my ADU?
In many cases, ADUs require separate utility connections for water, electricity, and sewer services. BuildADU.net evaluates your property’s infrastructure to determine the best and most cost-effective utility solutions.
How do I design an ADU for Central Oregon’s climate?
Central Oregon’s climate demands energy-efficient and durable designs. BuildADU.net incorporates features such as:
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- High-quality insulation and energy-efficient windows
- Advanced heating and cooling systems
- Sustainable materials like metal roofing and reclaimed wood
- Outdoor spaces that complement the natural environment
Are there financing options for building an ADU?
Yes, there are several ways to finance an ADU:
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- Home Equity Loans: Borrow against your home’s equity.
- Construction Loans: Specifically designed for building projects.
- Grants and Incentives: Some programs support sustainable and affordable housing. BuildADU.net works with you to explore the best financing options for your budget.
Are ADUs permitted to have attached garages?
Yes, ADUs are permitted to have attached garages in many jurisdictions, including Central Oregon. However, zoning regulations and design standards may dictate how the garage is integrated into the overall structure. Be sure to review local building codes and consult with planning authorities to ensure compliance.
Can more than one ADU be established on a property?
Bend now allows up to two ADUs on a lot with a single-unit detached home. When you build two, one can be up to 800 sq ft and the second is capped at 500 sq ft (attached or detached, subject to all other standards). Always confirm zoning and any neighborhood rules before you start.
Can I convert an existing structure into an ADU?
Yes, converting existing structures like garages or basements into an ADU is a common practice. However, the structure must meet building codes and zoning requirements, which may necessitate modifications to comply with safety and habitability standards.
Where can I build an ADU in Deschutes County? Are ADUs allowed on my property?
In Bend and other cities within Deschutes County, ADUs are permitted in most residential zones, thanks to recent state and local code changes encouraging themdukewarner.com. If you have a single-family home (or in some cases a townhome or manufactured home) on a residential lot, you can typically add one ADU to that property bendoregon.gov. (Currently, only one ADU is allowed per lot with a primary dwelling in city limitsbendoregon.gov.) In unincorporated Deschutes County (outside city limits), new state legislation (SB 391) now allows ADUs on eligible rural residential parcels as well, but with additional restrictions. Rural ADUs are generally limited to properties zoned rural residential (not farm or forest zones) deschutes.org, and often the parcel must meet a minimum size (around 2 acres, which most rural residential lots do). These county ADUs must be built close to the main house (within 100 feet of the primary dwelling) deschutes.org and are capped at 900 square feet of usable floor area deschutescounty.gov. They also can’t be in designated farm, forest, or wilderness areas, or within certain unincorporated communities that aren’t part of a city deschutes.org. Bottom line: if your property is in a residential zone in Bend (or Redmond, Sisters, etc.), an ADU is likely allowed. If you’re in a rural part of Deschutes County, an ADU may be possible under the new program if your lot and zoning qualify. It’s always wise to double-check with the City or County planning department about your specific address before moving forward, just to be sure your property meets the criteria.
What is the process for permitting an ADU, and how long does it take to get approval?
Within Bend, ADU permitting is streamlined through a single building permit (covers Planning + Building) and the City lists 4–8 weeks for processing complete submittals (actual time depends on revisions and responsiveness). In the County (rural ADUs), expect land-use eligibility checks first, then building permit review. Working with local pros who know the submittal checklists helps keep things moving.
How will an ADU connect to utilities like water, sewer, and power?
An ADU will need all the same utilities as any home – water, wastewater disposal, electricity, etc. In urban areas like the City of Bend, you will typically tie into the existing utilities of your primary house. For example, the ADU’s plumbing can connect to your house’s water supply line and city sewer line (or septic, if that’s what you use). Often this means running extension pipes from the main house to the ADU. You usually do not need to install a completely separate water meter or sewer connection for a backyard ADU in Bend; many homeowners choose to keep a single account for the property. Keep in mind that even if you share lines, the city will charge system development fees for the new unit’s impact on water and sewer systems. These one-time fees can be significant bendoregon.gov, so be sure to factor them into your budget. If your property is on a septic system rather than sewer, the county will require an evaluation of the existing septic tank and drain field. In most cases, an existing septic designed for just one house won’t be sufficient for an additional dwelling, so you’ll need to upgrade the system or add a new septic system for the ADU deschutes.org. This could mean installing a larger tank or an additional drain field on your property (space permitting). For electricity, you have two options: extend the current electrical service or set up a separate service for the ADU. Many people simply run power from the main house’s electrical panel to a subpanel in the ADU. If your current panel has enough capacity (amperage) to handle the extra load of the ADU’s lights, appliances, heating, etc., this can be an efficient approach. Alternatively, you can have the utility company install a separate electric meter for the ADU, effectively giving it its own account. This isn’t required – it’s up to you – but some landlords prefer separate meters so that a tenant can pay their own utility usage. Finally, for other utilities like natural gas or internet: a gas line can be branched to serve an ADU’s furnace or water heater (or you can use electric appliances and avoid gas entirely), and internet/TV cable can simply be extended or a new line run to the ADU. The key is to plan out the utility connections early on. During the design phase, you and your builder will determine the best way to route water pipes, sewer lines, and electrical wiring to the ADU. In summary, expect your ADU to share the main house’s utilities in most cases – which is usually cost-effective – unless you opt for separate hookups. And remember to budget for connection fees/SDCs as required by the local agencies bendoregon.gov, as well as any septic system upgrades if you’re not on city sewer.
What are the benefits of working with BuildADU?
BuildADU.net is Central Oregon’s trusted partner for ADU design and construction. Here’s why homeowners choose us:
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- Local Expertise: We understand the unique zoning, permitting, and climate considerations of Central Oregon.
- Custom Designs: Our team creates ADUs tailored to your needs and lifestyle.
- Sustainable Practices: We prioritize eco-friendly materials and energy-efficient designs.
- End-to-End Support: From initial consultation to the final walkthrough, we’re with you every step of the way.
Ready to Start Your ADU Project?
Building an ADU in Central Oregon is a smart investment that enhances your property and lifestyle. Contact BuildADU.net today to schedule a consultation and take the first step toward creating your dream ADU!
