Portland ADU Permits

The Portland Zoning Code allows Accessory Dwelling Units (ADUs) to be added on a site accessory to a house, attached house, or manufactured home in all Residential zones, all Commercial zones, and the Central Employment (EX) zones.

The Zoning Code defines an Accessory Dwelling Unit as a smaller, auxiliary dwelling unit on the same lot or with a house, attached house or manufactured home. The unit includes its own independent living facilities with provisions for sleeping, cooking, and sanitation, designed for residential occupancy independent of the primary dwelling unit.

This  guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• 1 attached or detached ADU per residential property.
  

• No architectural consistency requirement in almost all neighborhoods.
  

• SDC Fees waived (if not used for short-term rentals for 10 years).
  

• Size- 75% of the square footage of the main house or 800 SF, whichever is smaller.

At Dweller, we are responsible for all of these tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Portland Zoning Code for Accessory Dwelling Units (ADUs).

Bend ADU Permits

According to the Bend Development Code, an Accessory Dwelling Unit (ADU) is a small dwelling unit on a property that contains a single-family dwelling unit as the primary use. An ADU may be attached to or detached from the single-family dwelling. ADUs are often called “mother-in-law apartments”, “granny flats”, or “garage apartments.”

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• Only one attached or detached ADU per residential property.

• No architectural consistency requirement in most neighborhoods. 

• SDC Fees charged, $5,500+

• Size- 600 or 800 sq ft maximum, depending on zone.

At Dweller, we are responsible for all of these tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Bend, OR Zoning Code for Accessory Dwelling Units (ADUs).

Troutdale ADU Permits

In Troutdale, OR, Accessory Dwelling Units are considered interior conversions of existing space or are attached to the primary dwelling as a physical addition. ADU’s are intended to enable a unit to be a complete, independent living facility with provisions within the unit for a separate kitchen, bathroom, and sleeping area.

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• Two ADU’s allowed on residential lots.

• Must use same materials as primary dwelling

• SDC Fees-Waived

• Size-800 SF or 50% of primary dwelling

At Dweller, we are responsible for all of these tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Troutdale, OR Zoning Code for Accessory Dwelling Units (ADUs).

Happy Valley ADU Permits

Happy Valley’s ADU permitting codes establish appropriate locations, site development standards, and permit requirements to allow for the provision of accessory dwelling units (ADUs) within the city. Such living space can aid in the housing and dependent care of family members, provide rental income to offset the costs of home-ownership, and add to the supply of affordable housing options available to the citizens of Happy Valley.

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• 1 attached or detached ADU per residential property

• Architectural consistency standards, may require privacy buffer, height cannot exceed 50% of primary dwelling.

• SDC Fees-

• Size-1,000 SF or 50% of primary dwelling, whichever is smaller

At Dweller, we are responsible for all tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Happy Valley Zoning Code for Accessory Dwelling Units (ADUs).

Lake Oswego ADU Permits

Lake Oswego defines Secondary Dwelling Unit (also known as Accessory Dwelling Units) as one additional dwelling unit located on a lot already containing a primary dwelling. An SDU may be in a detached structure or may be located within or attached to the primary dwelling.

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• 1 attached or detached ADU per residential property

• Design requirements on window type and location, may require privacy fencing, no entrance within 10 feet of property line.

• SDC Fees-around $20,0000

• Size-800 SF

At Dweller, we are responsible for all of these tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Lake Oswego permits for Accessory Dwelling Units (ADUs).

Oregon City ADU Permits

In Oregon City, OR, Accessory Dwelling Units (ADUs) are considered small, self-contained homes located on the same property as a principal home. They have their own kitchen, bathroom(s) and sleeping area, and must be smaller and shorter than the main home.

ADUs can be attached or detached, can be converted from existing structures or new construction, and are typically located discreetly on the lot in order to preserve a single-dwelling appearance from the street. Although often referred to as ADUs in zoning codes, they are more commonly known by other names that reflect their various potential uses, including “granny flats”, “in-law units”, “studio apartments”, and “secondary dwellings”.

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• 1 attached or detached ADU per residential property

• Architectural consistency standards, maximum lot coverage standards

• SDC Fees-$14,000+

• Size-800 SF or 60% of primary dwelling, whichever is smaller

At Dweller, we are responsible for all of these tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Oregon City Permitting Code for Accessory Dwelling Units (ADUs).

Milwaukie ADU Permits

In Milwaukie, OR, an “Accessory Dwelling Unit” is a second dwelling unit on a lot with a single-family detached dwelling. An ADU is incidental to, and smaller than, the main dwelling unit. An ADU can either be part of the main structure, attached to the main structure, or detached. ADU’s must include areas and equipment for sleeping, cooking, and sanitation (bathrooms and toilets).

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• 1 attached or detached ADU per residential property, attached and detached have different standards.

• Architectural consistency standards plus design and privacy standards,

• SDC Fees- around $12,000+

• Size-Type 1- 600SF, Type 2-800 SF or 75% of primary dwelling.

At Dweller, we are responsible for all of tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Milwaukie’s Permitting Code for Accessory Dwelling Units (ADUs).

Washington County ADU Permits

In Washington County, an accessory dwelling unit is a secondary, self-contained dwelling unit that may be allowed in conjunction with a detached single family dwelling. Accessory dwelling units are subordinate in size, location, and appearance to the primary detached single family dwelling.

An accessory dwelling unit generally has its own outside entrance and always has a separate kitchen and bathroom. It may be located either within, attached to, or detached from the primary detached single family dwelling unit. Only one accessory dwelling unit may be created in conjunction with a detached single family dwelling unit.

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• 1 attached or detached ADU per residential property

• SDC Fees-$6-25,000

• Size-800 SF or 50% of the primary residence, whichever is smaller

At Dweller, we are responsible for all tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Washington County Permitting Code for Accessory Dwelling Units (ADUs).

Gresham ADU Permits

In Gresham, OR Accessory Dwelling Unit (ADU) are described as a secondary unit on a residential property. ADUs can be created in a variety of ways, from converting a portion of an existing house to the construction of an entirely new building

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• One ADU per property, attached or detached

• Architectural consistency standards. 

• Short term rentals not allowed.

• SDC Fees-$8,500+

• Size-750 sf or 50% of primary dwelling, whichever is less.

At Dweller, we are responsible for all tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Gresham Zoning Code for Accessory Dwelling Units (ADUs).

Beaverton ADU Permits

In Beaverton, OR, an Accessory Dwelling Unit (ADU) is defined as a single unit providing complete independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking and sanitation. An ADU can be created by adding floor area, subject to the limitations of the zoning district in which it is located; or constructing a new structure, attached structure, or manufactured home with an internal or detached accessory dwelling unit.

An ADU must be completely separate from the primary dwelling unit (cannot have inter-communicating doors or openings). ADU’s shall have a separate exterior entrance or a common internal area accessible to the outside.

This guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• One ADU, attached or detached, per residential lot.

• SDC Fees- $12,000+

• Size-800 sf or 50% of primary dwelling, whichever is less

At Dweller, we are responsible for all tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Beaverton, OR Permitting Code for Accessory Dwelling Units (ADUs).

Tigard ADU Permits

Tigard, OR defines an accessory dwelling unit (ADU) as a self-contained residence located on the same property as a primary residence. ADUs must be smaller than the main house, and have their own separate cooking, sleeping, and bathroom facilities.

ADUs can be attached to the primary home by constructing an addition or converting space in existing structures such as a garage, attic or basement, or they can be detached as a stand-alone unit. ADUs provide complete and permanent provisions for living, sleeping, eating, cooking and sanitation.

This  guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• Two ADU’s allowed per property, one must be attached

• No architectural consistency requirements

• SDC Fees- Waived if covenant to not use as short term rental is signed.

• Size-800 sq ft maximum.

At Dweller, we are responsible for all of these tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Tigard, OR Permitting Code for Accessory Dwelling Units (ADUs).

Hillsboro ADU Permits

In Hillsboro, OR a secondary dwelling unit (also known as Accessory Dwelling Unit) is defined as an additional dwelling unit located on the same lot as a detached single family dwelling or duplex. A dwelling unit is specified by the presence of cooking facilities.

This  guide quickly outlines a summary of key zoning and construction standards. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• One secondary dwelling unit allowed in most zones.

• Architectural consistency standards and design standards.

• SDC fees waived.

• Size-250-750 sq. ft.

At Dweller, we are responsible for all tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about the Hillsboro Zoning Code for Accessory Dwelling Units (ADUs).

Clackamas County ADU Permits

This guide quickly outlines a summary of key zoning and construction standards for ADUs in Clackamas County. For an in-depth review of the application and review procedures for installing an ADU, see the pdf below.

• One attached or detached ADU for residential properties in the Urban Growth Boundary

• No architectural consistency requirements. 

• SDC fees charged, $6,200+ 

• Size- 900 sq. ft maximum in most zones

At Dweller, we are responsible for all of these tasks, including design, permitting, construction and installation of the ADU. As part of this model, Dweller’s fixed cost covers not only the cost of construction and installation, but also the cost of permitting, utility connections and landscaping.

Click here to learn more about Clackamas County, OR Permitting Code for Accessory Dwelling Units (ADUs).