3 rules for unincorporated Howard County, Maryland.
Verified from official government sources
In Howard County's common R-20 residential district, principal structures must sit at least 20 feet from the front lot line, 10 feet from side lines, and 30 feet from the rear. Larger setbacks apply along arterial or collector roads.
Howard County Zoning Regulations § 108.0.D.4.c (R-20 District)
Minimum setback requirements... c. From lot lines (1) Structures (a) Front .....20 feet ... (b) Side .....10 feet (c) Rear (i) Principal structure .....30 feet (ii) Accessory structure .....10 feet
In the R-20 residential district, a principal structure (house) may be up to 34 feet tall and an accessory structure up to 15 feet. Each Howard County zoning district sets its own maximum heights.
Howard County Zoning Regulations § 108.0.D.1 (R-20 District)
The following maximum height limitations shall apply: a. Principal structure .....34 feet b. Accessory structure .....15 feet
Howard County's single-family zoning districts do not set a flat maximum lot-coverage percentage. Buildable area is controlled instead through minimum lot size, required setbacks, and open-space rules under the Subdivision and Land Development Regulations.
Howard County Zoning Regulations § 108.0.F (R-20 District)
Open space percentage and lot size shall be calculated pursuant to the Howard County Subdivision and Land Development Regulations. In accordance with those regulations, developments that are eligible and elect to use the option for a smaller minimum lot size shall provide the required higher percentage of open space.
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