Title/Name/Summary
Lot Coverage - 3+ Car Driveways & Accessory Structures
History
This is a follow up to the discussion during the June 22, 2009 Development Services Committee regarding swimming pools and lot coverage related to stormwater. During this discussion, staff was asked to investigate how the requirement of side-loaded three (3) car garages (further abbreviated as “3CSLG”) vs. a typical three (3) car front-loaded garage (“3CFLG”) affects lot coverage, in terms of driveway lot coverage.
Staff investigated the actual sizes of constructed driveways for houses with a typical 3CFLG design and a typical 3CSLG design via the plats of survey for various houses in the Brook Hills, Ishnala, Evergreen View, Colette Highlands and Sterling Ridge subdivisions. These plats were used to determine an average driveway square footage for a front-loaded driveway and a side-loaded driveway. These subdivisions were chosen because Brook Hills & Ishnala are areas where three (3) car garages became quite common, and Evergreen View, Colette Highlands and Sterling Ridge are three of the more current residential developments where three (3) car garages are the status quo, but side-load garages were not necessarily a requirement.
The average area of the 3CSLG driveways surveyed from Evergreen View, Sterling Ridge and Colette Highlands is ~1288 square feet. The average area of the 3CFLG driveways surveyed from Brook Hills and Mallard Landings is ~ 950 square feet. Therefore the general average difference between a 3CSLG garage and 3CFLG can be estimated as 338 square feet- quite a large increase when a side-load driveway is required. The lot size in R-3 zoning is 10,000 to 12,000 square feet (minimum = 80 ft. wide by 125 ft. deep = 10,000 square feet) and 338 square feet of driveway area would equate to approximately three percent (3%) additional lot coverage on account of using a 3CSLG garage design.
Additional Lot Coverage Options
Stormwater management/lot coverage is...
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