Environmentally Critical Areas | Environment & Sustainability
and associated impervious surface areas lying within the buffer or building setback subject to the following: i. If the existing legally created building(s) and associated impervious surfaces are located within the building setback or buffer required for a landslide hazard area, a critical areas study must be supplied consistent with the provisions of SDC 21.03.020K.3. and approved by the City that demonstrates that there will be no increased risk to life or property by the proposed footprint expansion; ii. If the existing legally created building(s) and associated impervious surfaces are located over or within a wetland, stream, or landslide hazard area, no further expansion within the wetland, stream, or landslide hazard area is allowed; and
the modification, addition or replacement may be located closer to the wetland or stream, provided no portion of the modification, addition or replacement is located closer than 50 feet to the wetland or stream. c) Modifications, additions, or replacements authorized under this subsection shall meet the following criteria: 1) A critical areas study approved by the City demonstrates that the proposed modification, addition, or replacements authorized by this subsection will also result in a net improvement in hydrologic and habitat values to the subject affected wetland, stream, fish and wildlife habitat conservation area through restoration of degraded areas and/or buffer or through provision of additional vegetated buffer; and 2) Mitigation of impacts to disturbed critical areas or buffers is provided in accordance with this chapter.
iii. If an existing legally created building(s), and associated impervious surfaces, are located
within the building setback or buffer for a stream or wetland, or within a fish and wildlife habitat conservation area: a) No portion of the modification, addition or replacement may be located closer to a wetland or stream than the nearest extent of the existing building(s), except as provided under subsection 2.c.iii.(B) of this section. b) When there is an intervening building(s) on a perpendicular line in between the subject wetland or stream and building(s) that is proposed to be modified, added to, or replaced,
4. Revisions to existing legally established landscaping are allowed subject to the following: a. The landscaped area shall not be increased within the critical area or buffer; and b. Landscaping features may be revised or replaced with similar features or features with less impact to the critical area or buffer, such that the remaining functions of the critical area and/or buffer are maintained or
Effective | January 1, 2022
Title 21: Sammamish Development Code | 65
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