Agenda - Planning Commission - 03/07/1995

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.Page'Three 'THE ZONING REPORT yards as it has wallS with main entrances, a rear wall is the wal! opposite any front Wall unless it is a front ~aI1, and a side zone yard abuts any wall not h~ving a front or rear yardi (4), a single distance between each combination of parailel and non-p~rallel walls, where a par- ailel wall is defined ~s being within 30-45 de- grees of being para!lel to an adjacent wall, otherwise the oppos~e wall is a non-paralleI wall including any w~ll terminating at a cor- ner; (5), a distance fwhich is the sum of the height of adjacent ~uildings or a multiple, of the height of the tal!er building, and for ad'a- cent buildings on slo~ing grade, the roof eleva- tion of the taller building with respect to the lowest grade elevation of' the other building; (6), a decreasing tn~r~ease in spacing distance as building height inc~eases based on a table of building heights; (7),I a formula by which the height of the tailer ~uflding is combined with the length of both a~jacent buildings; and, (8), - less commonly in ree~'nt codes, a distance be- tween buildings base~ on a free and clear spa- cing in front of windows on wails of adjacent buildings. Minor provisions regu entation of buildings ment that, on lots pl at least twice the si. building site be locat .ating the siting and ori- )n lots include: a require- ~tted or created that are ;e allowed in the zone~ a ~d on the lot so that if it were later split, ano.~her building site could be provided so that bo~h building sites ~eet all zone yards for the t~Vo split lots. In a similar manner,' the-builclin~, site on large lots that could later be rezon~d to allow smaller lots in ~ i rural-estate zones ~nd large-lot single-faro ly zones is located to fallow additional building sites meeting the zo~.e yards for the replatted smaller lots; lots s.pli~ by zone and jurisdiction- al boundaries might [require that buildings be sited as much as feasible within one zone .and jurisdiction. :' All subdivision cod~s require that easements be platted on lots aI.~ng lot lines so the build- ing sites are not spli~ by easements. Lots and blocks in plats must _be laid out to avoid posi- tioning of existing !easements that split or cross logical building sites on lots. These ease- ments usually are for. major transmission lines and underground gas, water and sewer lines. Some subdivision codes require that. a circle be capable of being inscribed within every platted lot, to assure that a relatively compact and usable building site be provided. The radius of the circle increases in each zone district as minimum lot area increases. Special situations that ma~ require siting/orientation In conventional zoning regulations, the most common special Situation that'regulat~s the siting of buildings is hillside zoning. It requires a reasonably large and relatively level build- able site be provided on each hillside lot for the main building. The size of the building site might be at least 40% of the area of the lot or have a minimum size of 30x40 it, with the maximum average slope of the building site being 10-18%. The building site must be juxta- positioned on the lot to provide reasonable driveway access to {he public street. A transi- tion area is defined in the zoning code to avoid excessive grading, cuts and fills between the building site and all setback lines on the lot. For lots partially located in flood hazard area.s, the building site for the main building must be sited outside the flood fringe boundary if possible, or meet floodproofing and flood elevation requirements for the building and access drive to the building. These require- ments apply to development proposed on lots of record existing when the flood regulations were enacted. Subdivisions platted after the flood hazard regulations were enacted must lay out 'lots to provide building sites that are out- side the flood fringe area, including the clus- tering of dwelling units outside the flood fringe. Zoning codes with solar energy provisions offer density bonuses for development projects designed to achieve significant conservation of energy. The layout of streets in subdivision February 24, 1995 Issue