I&P Notice 6/3/2024
Effective June 23, 2024 Anne Arundel County Department of Inspections and Permits will adopt the 2021 Editions of the International Code Council (ICC) Codes, and the 2020 Edition of the National Electrical Code (NFPA70) in accordance with the State of Maryland law. Also effective June 23, 2024, the Permit Center will no longer accept PLANS ON FILE for pools or solar panel installations.
Changes are effective 6/23/2024
- Ground snow load: 25 psf
- Wind design speed: 115 mph
- Topographic effects: No
- Special wind region: No
- Wind-borne debris zone: No
- Seismic design category: A
- Subject to damage from weathering: Severe
- Frost line depth: 30 inches
- Subject to damage from termites: Moderate - Heavy
- Decay: Slight - Moderate
- Ice barrier underlayment required: Yes
- Flood hazards: Originally May 2, 1983;
- Currently October 16, 2012, Revised February 18, 2015
- Air freezing index: >1500
- Mean annual temp: 55
- Elevation: 154
- Altitude correction factor: none
- Coincident wet bulb: 74
- Indoor winter design dry-bulb temperature: 70
- Outdoor winter design dry-bulb temperature: 17
- Heating temperature difference: 53
- Latitude: 39
- Daily range: M
- Indoor summer design relative humidity: 50%
- Summer design gains: 36
- Indoor summer design dry-bulb temperature: 75
- Outdoor summer design dry-bulb temperature: 91
- Cooling temperature: 16
- Deck construction must comply with all specifications provided in the Deck Construction Guide
- Structures less than 5’-0” from property line
- Residential dwelling equipped with sprinkler system but less than 3’-0” from property line
- One (1) hour fire resistance wall assembly;
- 5/8 inch Type ‘X’ gypsum board each side of stud wall or equivalent
- Shall be installed from the foundation up to the underside of roof sheathing
- New construction, Demo and Rebuild structures
- Additions constituting more than 50% increase in square footage inclusive of an unfinished basement
- ADU without free-flowing access (i.e. case opening) from attached principal dwelling shall have a wall separation with minimum One (1) hour fire resistance construction
- Access door in-between shall have minimum 45 minute fire resistance construction
- One (1) hour fire resistance wall assembly;
- 5/8 inch Type ‘X’ gypsum board each side of stud wall or equivalent
- Shall be installed from the foundation up to the underside of roof sheathing
- Requires a Maryland registered Engineer or Architect signed & sealed construction drawings
| Bedroom window | Minimum window required - Minimum net clear opening height - Minimum net clear opening width - Maximum still height - | One 5.7 sq. ft 24-inches 20-inches 44-inches |
| Hallways | Minimum width - | 3 feet |
| Stairways | Minimum clear width - Minimum headroom - Minimum tread - Maximum riser - | 3 feet 6 ft 8 in 10-inches 7 3/4 inches |
| Guardrail | Minimum height + required at walk surfaces over 30-inches above grade or stairs with 4 or more risers | 36-inches |
| Railing | Minimum height (required at least one side of stair) | 34 to 38-inches |
| Pickets | Maximum clear spacing between pickets | 4-inches |
| Working space around electric equipment | Minimum width - Minimum in front - | 30-inches 36-inches |
| Ceiling height | Habitable rooms - Other areas - Under beams & ducts - | 7 ft, 0 in 6 ft, 8 in 6 ft, 4 in |
| Bathrooms | Water-resistant gypsum backing board used as the base or backer for adhesive application of ceramic tile or other required nonabsorbent finish material | |
| Emergency Escape And Rescue Openings | At least one Emergency Escape and Rescue Opening is required for basement and habitable attic | |
| Fire stopping | All duct chases, bulkheads, laundry chutes, metal flues, tub traps, and all shafts at each floor | |
| Fuse box | Do not locate fuse box in clothes closets | |
| Smoke detectors | One (1) required on each level, plus one (1) in each bedroom and one (1) outside each sleeping area. Each shall have internal battery back-up plus being hardwired. | |
| Exterior stud walls | 2x4 or 2x6, P.T. sole plates in contact with masonry or concrete | |
| Wall coverings | Drywall - ½ inch Paneling - (Maximum smoke density - 450 Maximum flame spread - 200 | |
| Habitable rooms | Minimum area - Minimum horizontal dimension - | 70 sq. ft. 7 feet |
| Garage Separation | Attached garage separation from residence and attic minimum 1/2" gypsum board. Habitable rooms above garage minimum 5/8" Type "X" gypsum board. Non-combustible floor sloped to overhead door with 4" minimum elevation to residence floor. Minimum 20 minute or 1-3/8" solid wood door with self-closer. No openings into sleeping areas. |