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20.50.012 B definitions.
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Basement. That portion of a story partly or totally underground and having at least one-half of its height more than five feet below the adjoining finished grade. (Ord. 5989, 2-7-11, § 8)

Battery Charging Station. An electrical component assembly or cluster of component assemblies designed specifically to charge batteries within electric vehicles, which meets or exceeds any standards, codes, and regulations set forth in Chapter 19.28 RCW and consistent with the rules adopted by the Building Code Council for electric vehicle infrastructure requirements. (Ord. 5989, 2-7-11, § 8)

Battery Exchange Station. A fully automated facility that will enable an electric vehicle with an interchangeable battery to enter a drive lane and exchange the depleted battery with a fully charged battery through a fully automated process, which meets or exceeds any standards, codes, and regulations set forth in Chapter 19.28 RCW and consistent with the rules adopted by the Building Code Council for electric vehicle infrastructure requirements. Operators of battery exchange stations must comply with federal and state law regulating the handling, storage, and disposal of batteries. (Ord. 5989, 2-7-11, § 8)

Bed and Breakfast. An owner-occupied dwelling which temporarily houses guests for profit. A bed and breakfast does not include a rooming house as defined in LUC 20.50.044. (Refer to LUC 20.20.140 for general development requirements applicable to bed and breakfast uses.) (Ord. 6223, 4-6-15, § 5; Ord. 4028, 7-17-89, § 10)

BelRed. The area of the city located generally from Interstate 405 to Bellevue’s border with Redmond at 148th Ave NE (including a small triangle west of 156th Ave NE) and between State Route 520 and Bellevue-Redmond Road, which area is more specifically described in the BelRed legislative rezone (Ord. 5876, 5-18-09, § 36; Ord. 5875, 5-18-09)

Best Available Science (BAS). Current scientific information used in the process to designate, protect, or restore critical areas that is derived from a valid scientific process as defined by WAC 365-195-900 through 365-195-925, now or as hereafter amended. (Ord. 5683, 6-26-06, § 34)

Best Available Technology. The most effective method, technique or product available which is generally accepted in the field and which is demonstrated to be reliable and effective, which requires a low level of maintenance and which is responsive to the needs of the specific situation in which it is proposed to mitigate adverse impacts on the natural system. (Ord. 3775, 5-26-87, § 25)

Binding Site Plan. The division of land into lots or tracts classified for industrial or commercial use as provided by RCW 58.17.020 and 58.17.040. (Ord. 3848, 11-16-87, § 10)

Boarding. An animal service, which may include hobby kennel, kennel, veterinary, or pet day care uses. (Ord. 5876, 5-18-09, § 36)

Boarding House. An owner-occupied dwelling in which individuals unrelated to the owner are housed and/or fed for profit. This definition includes transient lodging as defined in LUC 20.50.048. (Refer to LUC 20.20.140 for general development requirements applicable to boarding house uses.) A boarding house does not include a rooming house as defined in LUC 20.50.044. (Ord. 6223, 4-6-15, § 6; Ord. 4654, 6-6-94, § 77; Ord. 4028, 7-17-89, § 11)

Boundary Line Adjustment. A division made for the purpose of alteration by adjusting boundary lines between platted or unplatted lots or both which does not create any additional lots, tracts, parcels, or building sites, nor create existing lots which are more nonconforming. (Ord. 5480, 10-20-03, § 33; Ord. 3937, 7-18-88, § 3)

Breakwater. Protective structure usually built offshore for the purpose of protecting the shoreline or harbor areas from wave action of water.

Bridge. A structure spanning and providing passage over a gap or barrier, such as a stream, river, floodplain, ravine or roadway. There are six basic modern bridge forms: the beam, the truss, the arch, the cantilever, the cable-stay, and the suspension. (Ord. 5683, 6-26-06, § 34)

Buildable Area. That area of a property remaining after area defined as a critical area and critical area buffer pursuant to Part 20.25H LUC has been subtracted from the gross land area. (Ord. 5683, 6-26-06, § 35; Ord. 5403, 8-5-02, § 13; Ord. 3775, 5-26-87, § 25)

Building. Any structure used or intended for supporting or sheltering any use or occupancy.

Building Height. The vertical distance measured from the average elevation of the finished grade around the building or building segment to the highest point of a flat roof, or to the mean height between the eaves and ridge of a pitched roof. Specifically excluded from this definition and from the regulation of maximum building height are structural elements not intended for habitation and not exceeding 15 feet above the maximum building height including penthouses for mechanical and elevator equipment, chimneys, wireless communication facility antenna arrays, smoke and ventilation stacks, flagpoles, mechanical and elevator equipment, and parapet walls designed solely to screen mechanical and elevator equipment. This definition does not apply to projects located within a Transition Area Design District (refer to LUC 20.25B.040), the Shoreline Overlay District (refer to LUC 20.25E.280 – “Height”), Single-Family Land Use Districts (refer to the definition of “Building Height – Single-Family Land Use Districts” contained in this section; see also LUC 20.10.440, Note (16), and to the F1 Land Use District (refer to LUC 20.25F1.040, Footnote (6)). (Ord. 6417, 5-21-18, § 68; Ord. 6197, 11-17-14, § 35; Ord. 5791, 12-3-07, § 1; Ord. 5460, 8-4-03, § 9; Ord. 5232, 6-26-00, § 19; Ord. 5086, 8-3-98, § 9; Ord. 4352, 4-13-92, § 2; Ord. 2945, 2-2-81, § 18)

Building Height – Shoreline Overlay Districts. See Part 20.25E LUC – Shoreline Overlay District definitions. (Ord. 6197, 11-17-14, § 37)

Building Height – Single-Family Uses in Single-Family Land Use Districts. The vertical distance measured from the average elevation of the existing grade around the building to the highest point of a flat roof, or to the ridge of a pitched roof, provided this measurement does not apply to chimneys, wireless communication facility antenna arrays, shortwave radio antennas, smoke and ventilation stacks, and flag poles. This definition applies only to single-family residential structures, and structures accessory thereto, located in a single-family land use district. For all other structures, regardless of land use district, see the definition of Building Height contained in this section. (Ord. 6197, 11-17-14, § 36; Ord. 5896, 8-3-09, § 4; Ord. 5791, 12-3-07, § 2)

Building Height – Transition Area Design Districts. See LUC 20.25B.040.A.1 – Transition Area Design District Building Height definition. (Ord. 6197, 11-17-14, § 37)

Building Segment. That portion of a terraced building on a sloping site which has a separate roof line or finished floor elevation with a grade change of at least four feet. (Ord. 4352, 4-13-92, § 3)

Building Site. A legal lot or parcel. See Area, Site.

Bulkhead. A wall or embankment used for holding back earth.

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