Lake Oswego Zoning & Land Use Guide
Last updated: Verified:
Key Zoning Facts
Regulatory Layers That Apply in Lake Oswego
Your property is subject to ALL of these regulatory layers. Each one can impose additional requirements beyond the others.
Federal
- FEMA Flood Zones: Applicable
- View FEMA Flood Map
State — Oregon
- Building Code: Oregon Structural Specialty Code (2021 IBC)
- State ADU Override: Yes (HB 2001 / SB 458 - Cities over 2,500 must allow ADUs; no owner-occupancy or parking mandates)
County — Clackamas County
- Role: Property records, tax assessment, unincorporated area planning
City / Municipal
The city's zoning ordinance, building codes, and local permits form the primary layer of land-use regulation for your property.
Overlay Districts
No overlay districts identified.
Private Restrictions
- HOA / CC&Rs common: Yes
- Check HOA CC&Rs for additional restrictions.
Primary Zoning Districts
| District Code | Name | Min Lot | Max Height | Front Setback | Side Setback | Rear Setback | FAR |
|---|---|---|---|---|---|---|---|
| R-6 | Residential 6,000 | 6,000 sq ft | 28 ft | 20 ft | 5 ft | 20 ft | — |
| R-3 | Residential High Density | None | 45 ft | 20 ft | 10 ft | 20 ft | — |
| GC | General Commercial | None | 45 ft | 0 ft | 0 ft | 10 ft | — |
ADU Rules in Lake Oswego
ADUs:Allowed
- Max Size
- 800 sq ft
- Max Height
- 24 ft
- Rear Setback
- 5 ft
- Side Setback
- 5 ft
- Parking
- None required (per state law)
- Owner Occupancy
- Not required (per state law)
- Permit Timeline
- 4-8 weeks
Official Sources
Frequently Asked Questions
Frequently Asked Questions
Can I build an ADU in Lake Oswego?
Yes. Oregon HB 2001 requires Lake Oswego to allow ADUs in all residential zones. No parking or owner-occupancy mandates apply.
How do I find the zoning for my property in Lake Oswego?
Use the City of Lake Oswego online zoning map or contact the Planning Division at (503) 635-0270.
What zones allow multi-family housing in Lake Oswego?
Multi-family housing is allowed in R-3 and R-2 zones. Duplexes are required to be allowed in single-family zones per HB 2001.
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Zoning codes and building regulations change frequently. Always verify current requirements with your local planning department and building authority before making any decisions.