Want to explore more about your property?

What Are You Allowed to Build at 326 N Mason St, Portland, OR, 97227?

Backyard Cottage

(Detached ADU)

Might be Allowed

This property may qualify for a Detached ADU of up to 429 sq ft allowed By Right, or possibly more by Special Permit, but there are some special considerations.

In Home Apartment

(Conversion or Addition)

Probably Allowed

This property meets the requirements for an Internal ADU of up to 761 sq ft allowed By Right, or possibly more by Special Permit.

Swimming Pool

Probably Allowed

This property likely meets the zoning requirements to build a swimming pool. Based on applicable zoning limits, the estimated buildable area for a pool. 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 1,830 sq ft of zoning-counted floor area allowed By Right, or possibly more by Special Permit.

Multifamily

Home Addition

Probably Allowed

We estimate you can expand this property by up to 429 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

R131054

Property Type

Single Family

Zone

R2.5

Year Built

1909

Lot Size

2,613 sq ft

Gross Building Area

1,788 sq ft

Gross Floor Area

1,401 sq ft

Estimated

Living Area

1,014 sq ft

Basement Area

0 sq ft

Impervious Surface

1,014 sq ft

Estimated

38.8%of lot coverage

ADU rules for Portland, OR

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