District Standards—Density and Dimensions | Zoning Districts
for a total of six units. Nothing in this subsection restricts or limits the application of the density bonus provisions found in other sections of the code. d. For subdivision proposals with density calculations resulting in fractions and where the project design utilizes townhomes or duplexes for at least 25 percent of the total project units, the fraction shall be rounded to the nearest whole number as follows:
a. The site has accumulated sufficient technique points pursuant to SDC 21.03.030.D, preferred low impact development incentives, to allow for inclusion of such areas as set forth in that section; or b. The site meets the tree retention incentives of SDC 21.03.060G., in which case 10 percent of the critical areas and buffers identified above may be included in the site area used for calculating base and maximum density or floor area.
i. Fractions of 0.21 or above shall be rounded up; and
I. Calculations—Site area used for minimum density calculations
ii. Fractions of 0.20 or below shall be rounded down.
Minimum density shall be determined by:
e. For the purpose of the application of this part, rounding is based on a fraction that is truncated to two numbers past the decimal point. For example, 2.50823 is truncated to 2.50.
1. Multiplying the density (dwelling units/acre) as set forth in SDC 21.04.040D.1. by the net buildable area of the project site; and then 2. Multiplying the resulting product by minimum density percentage set forth in SDC 21.04.030C.1.
H. Calculations—Site area used for density calculations
1. All site areas may be used in the calculation of maximum allowed residential density or project floor area except as outlined under the provisions of subsection 2. of this section. 2. Existing submerged lands, steep slopes and buffers, Categories 1 – 4 wetlands and buffers, Types S, F, Np, and Ns streams and buffers, and property to be used as a street(s) shall not be credited toward base and maximum density or floor area calculations; provided, that subdivisions or short plats that meet the tree retention standards of SDC 21.03.060G., Tree retention requirements, shall be credited 10 percent of the environmentally sensitive areas and associated buffers identified above.
J. Building Height Measurement
1. General
Buildings on relatively flat sites must use the measurement in subsection 2.a. below. Buildings on steeply sloping sites or set back more than 20 feet from the street right-of-way must use the measurement in subsection 2.b. below.
2. Measurement of Height
a. On any lot where existing grade slopes up or down less than 12 feet from the wall of the building closest to the front property line to the opposite wall at the rear of the building, the starting point for the calculation of
Effective | January 1, 2022
Title 21: Sammamish Development Code | 205
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