Accessory Dwelling Units

SUSTAINABLE

-increase use of alternative building materials

-reduce sprawl

-increase opportunities for biking / walking / public transit

-smaller (carbon) footprint; 650 sf current minimum for houses in Columbia

"Zoning ordinances that prohibit ADUs

or make it extremely difficult for homeowners to create them

are the principal obstacles to the wider availability

of this housing option."

-AARP Model State Act & Local Ordinance

ACCESSORY

DWELLING

UNITS

ADU Ordinance should consider:

-Owner occupancy

-Allowing tandem parking

-Incentivizing affordable rentals

-Limiting ADU size proportional to

-lot size

-primary residence size

-Incentivizing affordable rentals

ADUs a.k.a.

Back Yard Cottages

Mother-in-law Units

Granny Flats

Detached Accessory Dwelling Units

"[ADUs] are independent housing units

created within single-family homes

or on their lots."

-AARP Model State Act & Local Ordinance

El Paso, TX

In-Laws, Outlaws and Granny Flats

Portland, OR

FINANCIAL

SOCIAL

-diversified income for homeowners

-increase property taxes for City

-uses existing utility lines

-possible affordable rent program

- Inter-generational living

-facilitate ADA accessibility in older neighborhoods

-affordable rentals for students

-citizen-driven affordable housing programs

-increased security; more "eyes on the street"