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Permitting Authorities / City of Lake Oswego - Building Department

Do you need a permit to replace a roof in Lake Oswego, OR?

Adopted code

City of Lake Oswego - Building Department

The Building Department of the City of Lake Oswego, at 380 A Avenue, issues building permits in Lake Oswego, with its own permit technicians and building inspectors. The Oregon Residential Specialty Code applies in Lake Oswego as it does in every Oregon city. This listing covers the office's contact details and the rules state law sets for every Oregon town; it does not cover Lake Oswego's own permit rules.

Jurisdiction
City of Lake Oswego, Oregon
Jurisdiction type
city
Address
380 A Avenue, Lake Oswego, OR 97034
Contact
  • url: https://www.ci.oswego.or.us/building
  • phone: 503-635-0390
Permit portal
Permit portal
Contractor registration required
Required
Adopted code
The 2026 Oregon Residential Specialty Code (ORSC), the State's code for one- and two-family dwellings, adopted by the Building Codes Division in OAR 918-480-0005, which provides that "The Low-Rise Residential Dwelling Code, identified in ORS 455.610, will be known as the Oregon Residential Specialty Code." The 2026 ORSC "is based on the 2024 edition of the International Residential Code for One-and Two-Family Dwellings (IRC), with Oregon specific amendments" and took effect October 1, 2026. Its administrative chapter, Chapter 1, has been mandatory since that date. For its construction chapters (Chapters 2 to 44, including Chapter 9, Roof Assemblies) the rule set a six-month phase-in ending March 31, 2027, during which the 2023 ORSC, based on the 2021 IRC, also remained adopted and building departments had to accept plans designed to either edition; the 2026 edition is mandatory from April 1, 2027. Under the rule, "Code requirements in effect at the time a plan review or permit application is filed controls the construction under the application unless the applicant agrees to be controlled by subsequent changes." The code is the same in every city and county: "The state building code shall be applicable and uniform throughout this state and in all municipalities, and no municipality shall enact or enforce any ordinance, rule or regulation relating to the same matters encompassed by the state building code but which provides different requirements unless authorized by the Director of the Department of Consumer and Business Services" (ORS 455.040(1)). A city may therefore have a different local requirement only with the director's authorization, and this record did not read whether this city holds any such authorization. Where a city does not run a building inspection program, the county administers the code inside the city, and where the county does not, the State does (ORS 455.148(5) and (6)). In Lake Oswego the City's own Building Department runs the building program: its page lists the City's permit technicians and building inspectors, gives plan review times for residential structure permits, and takes permit applications online, so the city administers the code itself and the county and the State do not.
Sales & use tax
None. Oregon has no general sales tax, so neither the materials nor the labour on a reroof carries a state sales tax. The Oregon Department of Revenue says: "Oregon doesn't have a general sales or use/transaction tax."

Local roofing hub

Roofing in Lake Oswego, OregonCity hub

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Sources

Roofing questions: Lake Oswego, OR

Do roofing contractors need a license or registration in Lake Oswego, OR?

Yes.

What building code does Lake Oswego, OR use?

The 2026 Oregon Residential Specialty Code (ORSC), the State's code for one- and two-family dwellings, adopted by the Building Codes Division in OAR 918-480-0005, which provides that "The Low-Rise Residential Dwelling Code, identified in ORS 455.610, will be known as the Oregon Residential Specialty Code." The 2026 ORSC "is based on the 2024 edition of the International Residential Code for One-and Two-Family Dwellings (IRC), with Oregon specific amendments" and took effect October 1, 2026. Its administrative chapter, Chapter 1, has been mandatory since that date. For its construction chapters (Chapters 2 to 44, including Chapter 9, Roof Assemblies) the rule set a six-month phase-in ending March 31, 2027, during which the 2023 ORSC, based on the 2021 IRC, also remained adopted and building departments had to accept plans designed to either edition; the 2026 edition is mandatory from April 1, 2027. Under the rule, "Code requirements in effect at the time a plan review or permit application is filed controls the construction under the application unless the applicant agrees to be controlled by subsequent changes." The code is the same in every city and county: "The state building code shall be applicable and uniform throughout this state and in all municipalities, and no municipality shall enact or enforce any ordinance, rule or regulation relating to the same matters encompassed by the state building code but which provides different requirements unless authorized by the Director of the Department of Consumer and Business Services" (ORS 455.040(1)). A city may therefore have a different local requirement only with the director's authorization, and this record did not read whether this city holds any such authorization. Where a city does not run a building inspection program, the county administers the code inside the city, and where the county does not, the State does (ORS 455.148(5) and (6)). In Lake Oswego the City's own Building Department runs the building program: its page lists the City's permit technicians and building inspectors, gives plan review times for residential structure permits, and takes permit applications online, so the city administers the code itself and the county and the State do not.