A building envelope shall be established at every setback line, out of which no structure except chimneys shall penetrate; provided, however, that when Section 17.24.020(D) applies to a dwelling, the building envelope shall be established at that line past which no part of the dwelling may be erected. The envelope shall commence at existing grade at all setback lines, rising to a height of twenty-two feet directly above grade, then extending at a slope of forty-five degrees inward (away from the property line) to a maximum height of thirty-two feet measured from a warped plane parallel to existing grade. The following diagrams illustrates the building envelope profile, including the thirty-two foot height limitation, for zero and thirty percent slopes.

In the case of land that has not been altered from its natural state, "existing grade" means the natural grade. In the case of land that has previously been subject to grading, as defined in Section 15.24.020, "existing grade" means the grade that existed (as reasonably determined by the building department) five years prior to the date of the application for the building permit for the project for which the building envelope is being calculated.

(Ord. 657 § 3, 2005; Ord. 639 § 18 (part), 2003)

The height limitations for outdoor fixtures other than retaining walls are set forth in Chapter 12.12.

(Ord. 639 § 18 (part), 2003)

The maximum allowable retaining wall height shall be six feet or such lesser height as set forth in Sections 12.12.050(B), 17.24.010(B)(1), and 17.24.010(C) as applicable.

(Ord. 639 § 18 (part), 2003)