What the Birmingham zoning ordinance says about lot size and width, district by district. Section numbers link to the official ordinance.
A lot in R1A needs at least 20,000 square feet per dwelling unit (§ 2.04). A new dwelling needs at least 1,500 square feet of floor area.
The district table sets no minimum lot width. Lot control comes from § 4.27 LO-01 instead: a residential lot must abut a street for at least 30 feet and hold 30 feet of width from front to rear. Lots platted and unimproved as of December 12, 1966 may qualify for a 15 foot street-abutment exception.
A lot in R1 needs at least 9,000 square feet per dwelling unit (§ 2.06). A new dwelling needs at least 1,500 square feet of floor area.
The district table sets no minimum lot width. Lot control comes from § 4.27 LO-01 instead: a residential lot must abut a street for at least 30 feet and hold 30 feet of width from front to rear. Lots platted and unimproved as of December 12, 1966 may qualify for a 15 foot street-abutment exception.
A lot in R2 needs at least 6,000 square feet per dwelling unit (§ 2.08). A new one-story dwelling needs at least 1,000 square feet of floor area; a dwelling of more than one story needs 1,200 square feet.
The district table sets no minimum lot width. Lot control comes from § 4.27 LO-01 instead: a residential lot must abut a street for at least 30 feet and hold 30 feet of width from front to rear. Lots platted and unimproved as of December 12, 1966 may qualify for a 15 foot street-abutment exception.
A lot in R3 needs at least 4,500 square feet per dwelling unit (§ 2.10). A new one-story dwelling needs at least 800 square feet of floor area; a dwelling of more than one story needs 1,000 square feet.
The district table sets no minimum lot width. Lot control comes from § 4.27 LO-01 instead: a residential lot must abut a street for at least 30 feet and hold 30 feet of width from front to rear. Lots platted and unimproved as of December 12, 1966 may qualify for a 15 foot street-abutment exception.
R4 needs 3,000 square feet of lot area per unit. Front setback: 25 feet. Rear: 30 feet. Total floor area may not exceed 40 percent of the lot.
The district table lists a minimum floor area of 800 square feet for a one-story dwelling and omits the figure for dwellings of more than one story. Confirm the multi-story minimum with the city.
R8 needs 3,000 square feet of lot area per unit. Rear setback: 20 feet. Sides: 7 feet interior, 10 feet on a corner. Minimum unit floor area: 900 square feet. Height tops out at 30 feet or 2.5 stories.
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