Laserfiche WebLink
City of Tukwila My WebLink |HelpSearch Tips |About |Sign Out
Page 3 <br />sprinkler system is installed); Transportation impact fees range from $350 to $550 <br />depending on the location. <br />There are some ADU owners with unoccupied units who do not want to pay for or deal <br />with the hassle of making the necessary changes to their units to bring them into life <br />safety compliance due to costs. Therefore, they choose not to register their ADU. <br />There is no fee for registering an ADU with the City. Standard building permit and <br />inspection fees apply depending on the cost of improvements. <br />City Council was briefed on all the issues listed above and the Planning and Economic Development <br />Committee has forwarded this item for the Planning Commission's review and recommendation. The <br />Committee has directed that all four zoning related items listed above be reviewed by the Planning <br />Commission to determine what amendments are necessary. <br />DISCUSSION <br />1. ADU vs main house size limitations: Under current regulations attached ADUs may occupy a <br />maximum of 40% of the square footage of the single-family dwelling (excluding the area of any <br />attached garage) or up to 1000 square feet, whichever is less. Detached ADUs may be a <br />maximum of 800 square feet and if built over a detached garage, the detached garage does not <br />count toward the areas limit for the ADU. <br />This requirement can be easily met for new homes, however many basement ADUs in one-story <br />homes are the same size as the main floor of the primary home, so it's difficult for them to meet <br />the size limit of 40% of the primary dwelling. Meeting this requirement either involves increasing <br />the size of the primary dwelling or reducing the size of the basement unit by making some of the <br />square footage unusable. The percentage limit varies from 40% to 75% in some cities. Some <br />cities have a maximum size limit and no percentage requirement. <br />Pros <br />Cons <br />Option 1 <br />No Change. Keep the 40% size <br />ADU is smaller than <br />It limits some preexisting <br />limit up to a maximum of 1,000 <br />the main house thus <br />homes from getting an <br />square feet. <br />preserving the single <br />ADU registered without <br />family character of <br />adding on the house or <br />the neighborhood. <br />making some area <br />unusable. <br />Option 2 <br />Increase the 40% size limit for all <br />This may give more <br />It limits some preexisting <br />attached ADUs up to a maximum of <br />flexibility yet keep <br />homes from getting an <br />1000 square feet. This increase <br />the maximum size of <br />ADU registered without <br />could range from 40% to 75% <br />an attached ADU to <br />adding on the house or <br />1000 square feet. <br />making some area <br />unusable <br />Option 3 <br />Keep the 40% size limit up to a <br />Provides flexibility for <br />There may be some <br />maximum of 1,000 sq. ft. for new <br />existing homes while <br />small existing homes <br />homes. For preexisting homes <br />keeping the <br />that could have equal <br />allow an ADU up to a maximum <br />percentage limit for <br />square footage for the <br />size of 1000 sq. ft. but have no <br />new construction. <br />two units making the <br />percentage limit to allow better use <br />structure more like a <br />of floor space. <br />duplex.40% of a 2,500 <br />sq. ft. home is 1,000 sq. <br />N <br />