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County of Frederick (MD)

Maryland Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2023
Fire Code Version2018 Building Code
SolarAPP+ StatusTargeted
Wet Stamps RequiredDigital Structural
Fire Setback Enforced1

Codes

NEC Code Version
2023
Fire Code Version
2018 Building Code
Code List

2021 BUILDING CODE

2021 RESIDENTIAL CODE

2023 NEC NATIONAL ELECTRICAL CODE

2021 INTERNATIONAL PLUMBING CODE

2021 INTERNATIONAL FUEL GAS CODE

2021 INTERNATIONAL MECHANICAL CODE

2021 INTERNATIONAL FIRE CODE

2021 LIFE SAFETY CODE

2021 INTERNATIONAL ENERGY CONSERVATION CODE

ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status
Targeted
Any SolarAPP+ Restrictions
1
SolarAPP+ Restrictions
MPU,Derate
How Many Plansets Required
Other (See Submission Notes)
Revision Required
0
New Planset Required For Module Swap
0

Stamps

Ee Stamp Required On SLD
No
Wet Stamps Required
Digital Structural
Structural Calculations Required
Yes
Stamp Location On Plans
Unspecified
Date On Stamps
Expiration Date

Fire setbacks

Fire Setback Enforced
1
Setback Notes

3' at the ridge of the array as well UNLESS there are no panels installed at all on the opposite roof section, in which case a 18" offset at the ridge is allowed.

Structural & loads

Wind Speed
115
Wind Notes

Exposure Category B

Snow Load
30
Reducible Snow Load Allowed
1
Max Attachment Spacing
96
Structural Notes

Standard

Minimum Ground On Roof
#10

Electrical

Electrical Load Calcs Required
Derates
Allowed POI
Line Side Taps,PV Breaker,Meter Adapter,Load Side Taps
Panel Schedule Required
Partial Home Backup
Temperature Rating
90
De Rating Ampacity
0.91
BOS Restrictions

If there is to be a fused disco inside, use a flush-mounted breaker housing instead of a surface-mounted knife-blade switch. Former is aesthetically pleasing. Latter is not. 2 disconnects needed one for inside and outside if finished basement please add flush mount load center to fit system size. ( For lineside taps only )

Battery / ESS

Unique Battery Placards Needed
0
ESS Notes

Standard

Separate ESS Disconnect Required
ESS Disconnect
ESS Elevation Detail Required
No

Plan set

Plan Set Requirements

INTERIOR LINE SIDE TAP SHOULD UTILIZE FLUSH MOUNTED BREAKER PANEL ON THE INTERIOR AND NON-FUSED EXTERIOR NEAR METER.

All Jobs:

  • Total roof square footage total
  • PV array percentage of the total roof square footage
  • Fire Sprinkler information
  • Wildlife Barrier installation (critter guard)
Cover Page Notes

All Jobs [Critter Guard will be installed on all projects // FIRE SPRINKLERS NOT PRESENT ON HOME]

Site Notes

All Jobs [Critter Guard will be installed on all projects // FIRE SPRINKLERS NOT PRESENT ON HOME]

Ground mount

Ground Mount Fencing Required
Mesh/Scrim
Ground Mount Notes

Ground mounts are considered accessory structured and need to have a plot map submitted along with plans to show building restriction lines.

Setback Front Yard
40
Setback Back Yard
40
Setback Side Yard
10
Compiled from public records, 2026. Requirements change with code cycles and local amendments. Verify with the County of Frederick (MD) building department before you rely on this, and treat it as a research head start, not a ruling. Getting quotes? Run them through the quote checker first.