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R-O -- residential-office district
The R-O district includes urban and suburban residential and professional office uses in areas undergoing a transition, or in areas where commercial uses might be damaging to established residential neighborhoods. The R-O district also provides a mix of low- to medium-density residential uses with certain specified business, personal and professional services that can function efficiently without generating large volumes of traffic. This district is governed by section 21.40.120 of the municipal code.

Dwelling	Lot Requirements			Yard Requirements				Building	Driveway	Landscaping
Units	Area	Width	Coverage	Front	Side	Rear	Usable	Height	Surface	Required
1	6,000 square feet	50 feet	50% max.	10 feet	5³	10 feet	None	Unrestricted⁴	Paved	5
2	6,000 square feet	50 feet	50% max.	10 feet	5³	10 feet	None	Unrestricted⁴	Paved	5
3	6,000 square feet	50 feet	50% max.	10 feet	5³	10 feet	300 square feet	Unrestricted⁴	Paved	5
4-5	6,000 square feet	50 feet	50% max.	10 feet	5³	10 feet	100 square feet	Unrestricted⁴	Paved	5, 6
							per dwelling unit
6-10	6,000 square feet	50 feet	50% max.	10 feet	5³	10 feet	100 square feet	Unrestricted⁴	Paved	5, 6, 7
							per dwelling unit
11+¹	14,000 square feet	2	50% max.	10 feet	5³	10 feet	100 square feet	Unrestricted⁴	Paved	5, 6, 7
							per dwelling unit
Nonresidential	6,000 square feet	50 feet	100%	10 feet	None⁸	10 feet	N/A	Unrestricted⁴	Paved	5, 6, 7
¹ Permitted only by a conditional use.
² Minimum 100 feet of frontage on a class I or greater street (see the Official Streets and Highways Plan.)
³ Plus 1 additional foot for each 5 feet of building height over 35 feet.
⁴ Except by Airport Height Zone regulations.
⁵ All areas not devoted to buildings, structures, drives, walks, off-street parking facilities or other authorized installations must be planted with Visual Enhancement landscaping.
⁶ See also the parking lot landscaping requirements of AMC 21.45.080.W.6.
⁷ See also the parking lot landscaping requirements of AMC 21.45.080.W.10.
⁸ If a side yard is provided, it must be at least 5 feet wide.