Environmentally Critical Areas | Environment & Sustainability
recording of the final plat, final short plat, or binding site plan resulting in five or more lots in the following circumstances: a. The existing improvement or nonconformance is located within environmentally critical areas or buffers. This includes, but is not limited to, a nonconformance within an area proposed to be included in an averaged or reduced buffer; and b. Removal of the existing improvement or nonconformance will result in a reduced impact to environmentally critical areas; or
to the regulations in place at their time of establishment, may be maintained and no critical areas study or review is required. 3. Modifications of Existing Improvements. Addition, expansion, reconstruction or revision of existing building(s) or other structures is subject to the following: a. Modification or Replacement. Structural modification or replacement of legally established structures that do not meet the building setback or buffer requirements for wetlands, streams, fish and wildlife habitat conservation areas, wildlife habitat corridors, or landslide hazard areas is allowed if the modification, replacement or related activity does not increase the existing footprint of the structure lying within the critical area, buffer or building setback area, and there is no increased risk to life or property. b. Expansions of Single Detached Dwelling Units and Accessory Dwelling Units. Structural modification of, addition to, or replacement of legally created single detached dwelling unit(s) and accessory dwelling unit(s) and associated impervious surfaces that do not meet the applicable building setback or buffer requirements for wetlands, streams, fish and wildlife habitat conservation areas, or landslide hazard areas are allowed a one-time up to 1,000 square foot increase in the existing total footprint of the single detached dwelling unit(s) and accessory dwelling unit(s) and associated impervious surface areas lying within the buffer or building setback subject to the following:
c. One of or more of the following criteria are met:
i. Removal or discontinuance of the existing improvement or nonconformance is necessary to meet water quality, drainage, or revegetation requirements or to qualify for incentives. ii. The existing improvement or nonconformance is a use no longer allowed in the zoning designation or would be incompatible with a proposed use. iii. Removal or discontinuance of the existing improvement or nonconformance is necessary for public health, safety, or welfare, including but not limited to adequate sanitation, access, and/or safe walking conditions for school children. 2. Maintenance of Existing Improvements. Existing single detached dwelling units, other structures, landscaping, and other existing uses that do not meet the requirements of this chapter, which were legally established according
Effective | January 1, 2022
Title 21: Sammamish Development Code | 63
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