Tigard, OR Zoning Overlays & Bonuses: Downtown Design Guide (2026)

Section 18.650.080 is the design standards section of Chapter 18.650, the Tigard Downtown Plan District, and it governs buildings in the downtown district of the City of Tigard, Washington County, Oregon. Its first group of standards targets first stories and the street. At least 50 percent of the first story front building elevation must sit no further from the front property line than the maximum front setback in Table 18.650.1. Nonresidential and mixed-use buildings need at least one entrance for each business with a street-facing first-story elevation, and entrances must face the street or a public space, not a parking lot.

Glass is measured by percentage. First-story street-facing facades need a minimum window area of 60 percent for nonresidential and mixed-use buildings and 30 percent for residential buildings. Facades above the first story need 30 percent, and those windows must have a minimum vertical to horizontal ratio of 1.5:1. First-story windows on nonresidential buildings need a visible transmittance of 0.6 or higher, except medical and dental offices. Windows must be recessed 3 inches into the facade.

Weather protection is required on nonresidential and mixed-use buildings. Awnings, marquees and canopies must project a minimum of 3 feet and a maximum of 6 feet, marquees need 10 feet of clearance, awnings and canopies need 8 feet, and internally lit awnings are not allowed. Storefront bays may be no more than 30 feet on center.

Roofs must be flat with a parapet or cornice, hip, gabled, full mansard, dormers or shed. Sloped roofs need a minimum 5/12 pitch and eaves projecting at least 12 inches. Corner buildings must add a feature such as the entrance at the corner, a prominent element within 20 feet of the corner, or a corner cut at a 45 degree angle. Prohibited exterior materials are vinyl siding, T-111 or similar sheet materials, plain concrete block, and mirrored glass. Outdoor space rules add a minimum of 600 square feet of public space on sites greater than 60,000 square feet and an average of 28 square feet of private space per dwelling in buildings with 4 or more units.