Jefferson County residential districts do not set a maximum lot-coverage percentage. Instead, minimum lot size plus setbacks and height control how much you can build. R-1 requires 12,500 s.f. for a single-family dwelling; R-1B is 9,000 s.f.; R-2 is 7,500 s.f. (4,500 for two-family).
Rather than a lot-coverage ratio, Section 30 regulates density through minimum lot area combined with the setback and height tables. Single-family minimum lot sizes include 12,500 square feet in R-1/R-1A, 9,000 square feet in R-1B/R-1C, and 7,500 square feet in R-2, with smaller minimums for two-family and multi-family development. The buildable footprint is effectively the lot minus required front, side and rear setbacks, so no separate coverage percentage is imposed at the county level. Your city may apply a coverage ratio instead.
Subdividing below minimum lot area or building without meeting lot-standard requirements is a zoning violation; plats and permits are checked against these minimums.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Jefferson County, CO
Jefferson County requires proper care for every animal and treats hoarding-type conditions (inadequate food, water, shelter, sanitation, or feces accumulatio...
Jefferson County, CO
In Jefferson County, as statewide, it is illegal to intentionally feed big-game wildlife. Colorado Parks and Wildlife prohibits placing feed, salt, or attrac...
Jefferson County, CO
Jefferson County has no ordinance banning backyard compost piles, and residential composting is allowed. There is no county-run curbside compost mandate for ...
Jefferson County, CO
Jefferson County has no general county ban on residential artificial turf; check your HOA and city. Colorado's HB22-1151 turf-replacement program funds swapp...
Jefferson County, CO
Colorado protects water-wise landscaping. Under CRS 38-33.3-106.5, an HOA may not prohibit xeriscape or drought-tolerant vegetative landscapes on property a ...
Jefferson County, CO
Colorado law lets residents of single-family homes and buildings of four or fewer units collect rooftop rainwater in up to two rain barrels totaling 110 gall...
See how Jefferson County's lot coverage limits rules stack up against other locations.
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