Mount Prospect, IL Building Setbacks & Zoning: Structure Height Limits (2026)

Section 14.905 of the Mount Prospect Village Code sets the bulk regulations for the R-1 single-family residence district, and subsection D governs height. The cap on a residential building is thirty five feet (35'). The height limitations apply to principal buildings constructed in the district, and the same subsection puts a forty foot (40') ceiling on any principal or accessory building for a nonresidential use on a zoning lot.

Four items are excluded from the height limits: chimneys, flagpoles, steeples up to seventy five feet (75') measured to the highest point of the steeple, and radio and television antennas attached to the principal structure. The steeple exclusion reaches only as far as seventy five feet (75').

Height is one of several R-1 bulk standards, and a tall house still has to fit the rest. For residential uses the same section requires a front yard of 30 feet and a rear yard of 25 feet, caps total impervious surfaces at forty five percent (45%) of the lot, and limits floor area ratio to 0.5. Interior lots need 8,125 square feet and a 65 foot minimum width, and corner lots need 9,375 square feet and a 75 foot minimum width.

Each residential district in the Village carries its own figure. The R-X district allows forty feet (40') for a residential building (Section 14.805), while R-A (Section 14.1005) and R-2 (Section 14.1105) match R-1 at thirty five feet (35'). In R-3 (Section 14.1205) a single-family or two-family building is limited to twenty eight feet (28') and a multi-family building to thirty five feet (35'). The R-4 district (Section 14.1304) caps multi-family buildings at thirty five feet (35').