Want to explore more about your property?
What Are You Allowed to Build at 521 N Cook St, Portland, OR, 97227?
Backyard Cottage
(Detached ADU)
Probably Not Allowed
This lot does not meet the requirements for a Detached ADU. A variance may be requested through your local zoning authority
In Home Apartment
(Conversion or Addition)
This property may qualify for an Internal ADU of up to 800 sq ft allowed By Right, or possibly more by Special Permit, but there are some special considerations.
Swimming Pool
Probably Not Allowed
This property likely does not meet the zoning requirements for a swimming pool. A variance or other zoning relief may be required. Final feasibility may depend on site-specific conditions and local interpretation.
Single Family
Probably Allowed
This property likely meets the zoning requirements to build a Single-Family home up to 1,960 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit.
Multi Family
Home Addition
Probably Allowed
We estimate you can expand this property by up to 102 sq ft under current zoning rules. This may allow for a horizontal addition, a vertical addition, or both, depending on design and permitting.
Property facts
Zoning Jurisdiction
PORTLAND
Parcel ID
R690233
Property Type
Single Family
Zone
RM2
Year Built
2020
Lot Size
1,306 sq ft
Gross Building Area
761 sq ft
Gross Floor Area
1,858 sq ft
Living Area
1,858 sq ft
Basement Area
0 sq ft
Impervious Surface
761 sq ft
58.2%of lot coverage

Based on public data and AI. Check with a pro. Read More
© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.
What Are You Allowed to Build at 521 N Cook St, Portland, OR, 97227?
Backyard Cottage
(Detached ADU)
Probably Not Allowed
This lot does not meet the requirements for a Detached ADU. A variance may be requested through your local zoning authority
In Home Apartment
(Conversion or Addition)
This property may qualify for an Internal ADU of up to 800 sq ft allowed By Right, or possibly more by Special Permit, but there are some special considerations.
Swimming Pool
Probably Not Allowed
This property likely does not meet the zoning requirements for a swimming pool. A variance or other zoning relief may be required. Final feasibility may depend on site-specific conditions and local interpretation.
Single Family
Probably Allowed
This property likely meets the zoning requirements to build a Single-Family home up to 1,960 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit.
Multi Family
Home Addition
Probably Allowed
We estimate you can expand this property by up to 102 sq ft under current zoning rules. This may allow for a horizontal addition, a vertical addition, or both, depending on design and permitting.
Property facts
Zoning Jurisdiction
PORTLAND
Parcel ID
R690233
Property Type
Single Family
Zone
RM2
Year Built
2020
Lot Size
1,306 sq ft
Gross Building Area
761 sq ft
Gross Floor Area
1,858 sq ft
Living Area
1,858 sq ft
Basement Area
0 sq ft
Impervious Surface
761 sq ft
58.2%of lot coverage

Based on public data and AI. Check with a pro. Read More
© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.