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What Are You Allowed to Build at 416 S Iowa St, Portland, OR, 97239?

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)

Probably Allowed
This property meets the requirements for an Internal ADU of up to 800 sq ft allowed By Right, or possibly more by Special Permit.

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 2,178 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 846 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

Streetview picture of 416 S Iowa St, Portland, OR, 97239

Zoning Jurisdiction

PORTLAND

Parcel ID

R273681

Property Type

Single Family

Zone

RM1

Year Built

1910

Lot Size

2,178 sq ft

Gross Building Area

1,026 sq ft

Gross Floor Area

1,332 sq ft

Estimated

Living Area

1,332 sq ft

Basement Area

0 sq ft

Impervious Surface

1,026 sq ft

Estimated
47.1%of lot coverage

ADU rules for Portland, OR

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 416 S Iowa St, Portland, OR, 97239?

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)

Probably Allowed
This property meets the requirements for an Internal ADU of up to 800 sq ft allowed By Right, or possibly more by Special Permit.

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 2,178 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 846 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

Streetview picture of 416 S Iowa St, Portland, OR, 97239

Zoning Jurisdiction

PORTLAND

Parcel ID

R273681

Property Type

Single Family

Zone

RM1

Year Built

1910

Lot Size

2,178 sq ft

Gross Building Area

1,026 sq ft

Gross Floor Area

1,332 sq ft

Estimated

Living Area

1,332 sq ft

Basement Area

0 sq ft

Impervious Surface

1,026 sq ft

Estimated
47.1%of lot coverage

ADU rules for Portland, OR

Based on public data and AI. Check with a pro. Read More

© 2026 TheBuilder AI Inc. d/b/aFutureLot. All rights reserved.