Rules for ZIP Code 21046
Columbia, MD · Howard County
130 local rules on file for this area. The rules on file for this ZIP code come from Howard County.
ZIP code 21046 is unincorporated Howard County land: about 100% of its residents live outside any city or town, so the county's ordinances are the local rules here. County rules tend to differ from nearby cities in areas like noise enforcement, building setbacks, and animal regulations.
ZIP codes do not follow city lines. 21046 also covers:
- Columbia (community)~100% of residents · not covered yet
Shares are estimates from 2020 Census geography. If your address is in one of these, its rules apply instead.
Each topic below links to the full ordinance breakdown with specific code sections, fine amounts, and answers to common questions. The data is sourced from the official municipal code and verified by our editorial team.
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These are the local rules that apply to ZIP code 21046 based on Howard County ordinances.
Short-Term Rentals
4 rulesSign Regulations
5 rules- Political SignsSome
- Window SignsSome
- Freeway-Facing SignsSignificant
- Garage Sale SignsSome
- Digital BillboardsSome
Trash & Recycling
8 rulesSidewalk & Pedestrian Rules
2 rules- Obstruction RulesSome
- Sidewalk RepairSome
Rental Inspections
2 rulesZoning Overlays & Bonuses
1 ruleBusiness Licensing & Operations
4 rules- Secondhand DealersSignificant
- Towing CompaniesSignificant
- PawnbrokersSignificant
- Massage EstablishmentsSome
Accessory Structures
6 rules- ADU Rental RestrictionsSome
- ADU Owner OccupancySignificant
- Shed & Carport RulesSome
- Garage ConversionsSome
- Tiny HomesSome
Public Conduct
6 rules- Public Alcohol UseSome
- Outdoor Smoking RestrictionsSignificant
- Public UrinationSome
- Skateboarding RulesLight
- Loitering RulesSome
Water Use Rules
2 rulesEnvironmental Rules
5 rules- Stormwater ManagementSome
- Erosion ControlSome
- Boat Dock PermitsSome
- Flood ZonesSignificant
- Flood Elevation RequirementsHeavy
Noise Ordinances
7 rulesSpecial Events & Permits
4 rules- Street Fair RulesSignificant
- Park Event PermitsSignificant
- Parade PermitsSignificant
- Block Party PermitsSignificant
Rental Property Rules
4 rules- Repairs & HabitabilitySome
- Rent ControlFew
- Just Cause EvictionSignificant
- Rental RegistrationSome
Right to Farm
1 rulePublic Health Rules
1 rule- Calorie LabelingSome
Parking Rules
8 rules- EV ChargingSome
- Commercial & Oversized VehiclesSome
- Snow Removal Parking RulesSignificant
- Loading ZonesSome
- Street Parking LimitsSome
Immigration Policy
1 rule- Sanctuary Policy PreemptionSignificant
Mobility & Curb Rules
3 rules- Red-Light CamerasSome
- Shared E-Scooter RulesSignificant
- Bike Lane RulesSome
Swimming Pools & Spas
2 rulesDrone Rules
1 ruleBuilding Safety
8 rulesTree Protection
2 rules- Parkway PlantingSome
- Protected Tree SpeciesSignificant
Food Trucks & Mobile Vendors
2 rules- Food Truck PermitsSome
- Vending ZonesSome
Outdoor Lighting
3 rulesFire Regulations
7 rules- FireworksHeavy
- Wildfire ZonesSome
- Fire Pits & Backyard FiresSome
- Smoke DetectorsSome
- Outdoor BurningSignificant
Animal Ordinances
7 rules- Dog Leash LawsSome
- Exotic PetsSome
- Cat RulesSome
- Breed RestrictionsSome
- Pet LimitsSome
Outdoor Cooking
2 rules- BBQ & Propane RulesSome
- Smoker RulesSome
Building Setbacks & Zoning
3 rulesFence Regulations
5 rulesLandscaping Rules
4 rulesHome Business
3 rulesHistoric Preservation
1 rule- Historic-Cultural MonumentsSignificant
Property Maintenance
2 rules- Vacant Lot MaintenanceSome
- Property BlightSignificant
Noise from Specific Sources
1 ruleCurfew Laws
1 rule- Park CurfewSome
Soliciting & Door-to-Door
1 ruleHOA Rules
1 rule- Board GovernanceSome