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Find all residential (one and two-family) dwelling code guides administered by Development Services. Code guides provide answers about the application of specific codes and outline optional alternates. View a list of residential building code guides published by Development Services.
The question or alternate described in each code guide is listed below the code guide link.
- Can I put a sink in a detached accessory structure that is not an ADU?
- What building code modifications are allowed for accessory dwelling units?
- Can cargo containers be installed on properties and used as accessory storage structures?
- The scope of the Oregon Residential Specialty Code (ORSC) is limited to structures not more than three stories above grade plane. Under what conditions may a four story residential structure be regulated under the ORSC?
- Are any deviations allowed in the City of Portland from the Oregon Residential Specialty Code (ORSC) definition for townhouse?
- Are any alternatives to the requirements of the Oregon Residential Specialty Code (ORSC) allowed when non habitable space is being converted to habitable space, or when the habitable use of a space is changing within an existing one- or two-family dwelling?
- What are the structural loading requirements for private elevated driveways and parking decks?
- In certain instances the Portland Fire Bureau requires sprinklers to be installed in one and two family dwellings. What installation standard should be used for residential fire sprinklers?
- Where NFPA 13D systems are required, are residential quick response sprinkler heads required to be installed over or adjacent to fuel-fired equipment located in garages?
- It is an increasing trend for homeowners to install permanent fuel fired generator systems where a system is not otherwise required by the code. What are the installation requirements for an optional fuel fired generator that is permanently installed for use by the occupants of a one or two family dwelling?
- When is a slope hazard evaluation required? What are the requirements for slope hazard evaluations?
More Code Guides
- City Code Guides
- Commercial Building Code Guides
- Commercial Mechanical Code Guides
- Commercial Plumbing Code Guides
- Commercial Electrical Code Guides
- Rescinded Code Guides
You can also read more about these codes, rules and guides: state building codes and related administrative rules and interpretations, City codes, City administrative rules, Business Practice Policies, program guides, Building Official's determinations, PBOT Codes and Guides, MOUs/IGAs and request a change to City codes or recommend a regulatory improvement change.