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The Barn Cabin 1 Bdrm 1 Bath 528 sq ft
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Jackson County ADU Resources courtesy of R3V
Accessory Dwelling Unit
rthreev.org/2022/01/12/accessory-dwelling-unit
What is an ADU?
ADU is short for Accessory Dwelling Unit. It can be accessory to detached single-family homes, townhouses, manufactured homes and duplex dwellings on their own lot.
Jump to your town’s ADU rules: Medford – Phoenix – Talent – Ashland – Central Point – Jackson County
If you are a professional homebuilder, see this set of ideas.
Why ADUs are important for you and your community
- Creates more housing density at lower costs within the Urban Growth Boundaries that maintain our wide open spaces for ag and wildlife.
- Serves people and places according to AARP by creating attainable housing for elders and people starting out.
- Supports aging in place, generational wealth building, and housing for extended family or friends.
- Adds affordable “missing middle” housing options in a moment of critical shortage/ opportunity. Missing middle is everything from ADUs to 8 unit complexes.
- Generates income – what does a 1 bedroom unit rent for in your area?
- Increases property values 25% to 34%. A 2012 study from Portland.
- Accelerates mortgage payoff at a time when 24% of Oregon homeowners are mortgage burdened and of that 9% are severely cost burdened- Oregon Center for Public Policy
- Reduces the need for cars and increases walking, biking, and transit use.
How an ADU could work for you
- ADUs are extremely valuable when it’s time to sell your home.
- Studies show that ADUs can increase property values and make homes more desirable to potential buyers, especially those interested in aging-in-place.
- Estimate your gains using this handy calculator. Scroll down the calculator to adjust assumptions. Or try this calculator.
Here’s Derek Sherrell, local ADU developer who offers a lot of great advice and encouragement to anyone interested in ADUs.
See more tips from Derek, That ADU Guy, on YouTube and on his website.
Pre-approved ADU Plans
Here’s Carlos Delgado, the architect who designed the ADU plans pre approved in the city of Medford talking about his approach to ADUs.
When ADUs might not work
- Zoning restrictions – most single family lots can now include an ADU
- Not enough space on your lot – buildable area of your lot, set backs, etc.
- Access to utilities is expensive – is there enough slope for the sewer line?
- Upfront costs of planning and permits
- Financing ADU’s can be tricky – check with your banker
- The form of your existing house may not make an attached ADU easy – attached ADU example
Check with your local community development staff before you give up on the ADU idea. More info below
How to get started
Here’s Kristen Maze, Director of Community Development at the City of Talent helping you think about preparing to apply for permits to build an ADU.
Trying to Make the Complex Simpler
This process is NOT simple. We are trying to help you get started, but know that there are many options and potential roadblocks along the way. But, as Derek says, the hard work is definitely worth it!
Lots of good materials on these websites:
- Building an ADU – resource book, podcast, etc.
- Here is a cost calculator for ADUs based on some simple assumptions.
- That ADU Guy
A Few Key Details About ADUs In Your Area
This is only a few key pieces of a much larger puzzle. Check with your local planning department, their contact information is at the top of this table. On your phone, click on the phone number to dial it.
Click to jump to your town: Medford – Phoenix – Talent – Central Point – Jackson County
Ashland
Planning department contact information
ADUs are allowed in zones
R-1, R-1-3.5, RR, WR, R-2, R-3, NN, NM
Setbacks and coverage ratios
Set back and coverage ratios vary for different zones. Find the requirements for your zone here.
Other rules
Just a start here, look at more info links for the complete picture
Off-street parking is NOT required
Accessory Residential Units (ARU) and in the Single-Family Residential Zones (R-1-5/R-1-7.5 & R-1-10) ARUs require a Conditional Use Permit.
Link to building permits
Central Point
Planning department contact information
stephanie.holtey@centralpointoregon.gov
ADUs are allowed in zones
R-L, R-1, R-2
LMR, MMR, HM
Setbacks and coverage ratios
Rear Yard Setback: 5 ft
800 sq ft or 50% of the gross floor area of the primary dwelling, whichever is less
Other rules
– just a start here, look at more info links for the complete picture
Off street parking is NOT required.
Separate utility connections are not required
Link to building permits
Medford
Planning department contact information
ADUs are allowed in zones
MFR-30, MFR-20, MFR-15, SFR-10, SFR-6, SFR-4, SFR-2
Setbacks and coverage ratios
Up to 75% of the primary dwelling’s Gross Habitable Floor Area (GHFA)
Detached ADUs cannot be larger than 900 sq. ft.; attached ADUs converted from existing space in the primary home cannot be larger than 50% of the primary dwelling
Other rules
– just a start here, look at more info links for the complete picture
Off street parking is NOT required
Link to building permits
Applying for a permit
ADU Fee Waiver
Phoenix
Planning department contact information
ADUs are allowed in zones
R-1
Setbacks and coverage ratios
Maximum lot coverage 40%
Minimum lot size 6,000sqft
Other rules
– just a start here, look at more info links for the complete picture
Off street parking is NOT required
Link to building permits
Building permit information here
Talent
Planning department contact information
ADUs are allowed in zones
RLD, RMD, RHD, RMH, CN
Setbacks and coverage ratios
Not to exceed 800 square feet of floor area, or 75 percent of the primary dwelling’s floor area, whichever is smaller.
Other rules
– just a start here, look at more info links for the complete picture
Off street parking is NOT required
More info here
Link to building permits
Jackson County
Planning department contact information
ADUs are allowed in zones
Unlikely outside the UGB, White City allows ADUs.
Rural areas are unlikely to allow ADUs. That is under review in the state wildfire risk map that is to be completed in Fall 2022.
Depends on your zoning because the County considers an ADU a separate dwelling on the lot.
Setbacks and coverage ratios
Depends on your zoning.
Other rules
Consult with planners at the County.
Link to building permits
How to finance your ADU construction
- Local banks you currently work with – equity line of credit, cash out refinance, etc.
- Craft3 ADU finance program
- In Portland, some developers who lease your land and build an ADU for you
- There is a lot of useful data around cost assumptions and financing options in this document from Santa Cruz County in California. Of course, our fees are different, but many of the construction cost estimates, financing options, etc. are still useful.
Oregon State ADU Code
Oregon Statue on Accessory Dwelling Units in Rural Residential Areas
ADUs are an important way to fill in the missing middle in our housing supply.
What Home Builders Can Do to Simplify Later ADU Development
Professional home builders can make ADU development much easier by planning ahead. This video offers a few good ideas.
One creative idea for affordable homes with ADUs is for builders to build the ADU first and sell the large lot with its approved larger home site left for future development. This allows buyers to get started on homeownership more easily while they can look forward to building their larger home once they have built equity in their starter home.
Other Ways to Encourage Missing Middle Development
- How to Enable MMH — Missing Middle Housing
- Missing middle housing – policy library
- How Eugene, OR is encouraging Missing Middle development
- Cutting the Gordian Knot of Attainable Housing Development
ADU Financing
There are many ways to finance an ADU project. Working with an experienced
lender to assess your financing options will help you to define the budget, timing
and scope of your ADU project.
Contact:
David Blackmon
Branch Manager NMLS 1017565
Lumen Mortgage
503-966-9255
dblackmon@lumenmortgage.com
Rice Architecture Students Win ADU|HOU Design Competition
“The Planning and Development Department’s recent ADU|HOU Design Competitionreceived enthusiastic response from architects and design professionals, and has garnered about 30 submissions of Accessory Dwelling Unit schematic designs and concepts. After receiving nearly 400 online votes, we have a winner.”
Congratulations to the Rice Architecture team.
“Double House,” submitted by two Rice Architecture students – Adam Berman and Siobhan Finlay – was the top design selected in a public online vote in early October. Read more
How To Build an ADU with Cost Breakdown
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GETTING STARTED
Transcript
Good day, ADU enthusiasts! Derek That ADU Guy here taking a minute to talk about zoning.
The very first step in the ADU process is calling your planning department and asking if you can build an accessory dwelling unit at your address.
Time and time again I see folks go out, they get a designer, they find a builder, they spend thousands of dollars to come up with an awesome plan just to go down and find out that there’s no allowable use in their zone. So the very first place that you need to be starting is with your community development department. A phone call, an email… you can do the homework yourself. You can go into the code and you can look at zoning maps, but it’s a lot easier if you just send an email or call.
This question comes up a lot: “what is the order of operations?”
A lot of people say well, budgeting is more important. You need to make sure that you can finance an ADU before you do any of the planning work, or before you do any of the zoning work. I disagree and I’ll tell you why.
If you have a spot in your town or county or municipality where you can build an accessory dwelling unit — it’s as an allowable use in your backyard — but you don’t have the financing there are avenues to find financing. Whereas, in the opposite argument, if somebody says you need to start with budget and you need to go through the whole process of getting pre-approved for the money, no matter what (even if you have money in-hand), if it’s not an allowable use in your zone, you’ve wasted your time.
So I always coach people with the simple starting process of going down to, or calling, or emailing your local planning office to ask directly if you can do an ADU in your front yard, backyard, side yard or incorporated as a part attached to your primary house.
Hope that helps. Again, the starting point is call your local planning and zoning office. Thanks for your time. Hope everybody’s having a good day!