zoneoptics
Tiburon, California · District

RO-1

Residential Open 1
ResidentialSingle FamilyAll Tiburon districts0

Dimensional standards

RO-1 lot requirementsSTREETFront 30 ftSide 20 ftMin width 70 ftMIN LOT AREA40,000 sq ftMAX LOT COVERAGE15%MAX DENSITY1.1 du/ac
Plan view of the district’s stated lot requirements. Solid line: the property line. Dashed: the setback lines the ordinance imposes; a building must stay inside the tinted envelope. Drawn from the figures extracted below — illustrative, not a survey.

Lot

Minimum lot areaMinimum lot areaThe smallest parcel on which the district allows anything to be built.
40,000 sq ftsq ftSquare feet. An acre is 43,560 sq ft; a typical suburban lot is 7,000–10,000. (0.92 acacre43,560 square feet — about the size of an American football field without the end zones.)
Minimum lot widthLot widthHow wide a lot must be, usually measured at the front setback line.
70 ft

Density

Maximum density
1.1 du/acredu/acreDwelling units per acre — the number of homes allowed on each acre of land.

SetbacksSetbackThe distance a building must be held back from a lot line.

FrontSetbackThe distance a building must be held back from a lot line.
30 ft
SideSetbackThe distance a building must be held back from a lot line.
20 ft

Height & bulk

Maximum lot coverageLot coverageThe share of a lot that buildings may cover, as a percentage.
15%

Uses

Permitted by right9

Conditional / special use16

Prohibited6

From the ordinance

RO-1: 40,000 s.f. min lot, 70 ft width, 30 ft front, 20 ft side, 15% coverage, 1.1 du/acre.
Table 2-2