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County of Calvert (MD)

Maryland Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2017
Fire Code Version2018 Building Code
SolarAPP+ StatusTargeted
Wet Stamps RequiredDigital Structural
Fire Setback Enforced1

Codes

NEC Code Version
2017
Fire Code Version
2018 Building Code
Code List

2018 INTERNATIONAL RESIDENTIAL CODE

2018 INTERNATIONAL BUILDING CODE

2018 INTERNATIONAL EXISTING BUILDING CODE

2018 INTERNATIONAL FUEL GAS CODE

2018 INTERNATIONAL PLUMBING CODE

2018 INTERNATIONAL HEALTH CARE FACILITIES CODE

2018 INTERNATIONAL FIRE CODE

2018 INTERNATIONAL LIFE SAFETY CODE

2017 NATIONAL ELECTRIC CODE

ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status
Targeted
Any SolarAPP+ Restrictions
1
SolarAPP+ Restrictions
MPU,Derate
How Many Plansets Required
2
Revision Required
0
New Planset Required For Module Swap
0

Stamps

Wet Stamps Required
Digital Structural
Structural Calculations Required
Yes
Stamp Location On Plans
Top Right
Date On Stamps
Expiration Date

Fire setbacks

Fire Setback Enforced
1
Setback Notes

Standard

Structural & loads

Wind Speed
115
Wind Notes

Exposure Category B

Snow Load
20
Reducible Snow Load Allowed
1
Max Attachment Spacing
96
Structural Notes

STRUCTURAL LETTER MUST STATE THIS ON FIRST PAGE OF STRUCTURAL CALCS:


I Certify that the existing roof can support all the loads required by the 2018IRC and the extra load of the solar panels.


AHJ REQUIRES THIS ON THE FIRST PAGE OF THE STRUCTURAL CALC LETTER. CAN BE HIGHTLIGHTED FOR GOOD MEASURE

Minimum Ground On Roof
#8

Electrical

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

needs interior flush mounted disconnect and exterior nonfused disconnect PLEASE SEE SLD SAMPLE BELOW IN THE ATTACHED FILES If there is to be a fused disco inside, use a flush-mounted load center with breaker instead of a surface-mounted knife-blade switch

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


Electrical Diagram

LST

  • SOLAR DISCONNECT NEEDED TO BE WITHIN 3FT OF MAIN SERVICE DISCONNECT
  • IF MAIN SERVICE IS INTERIOR PANEL, FLUSH MOUNT AC DISCONNECT NEEDED INTERIOR AND ADDITONAL DISCONNET NEEDED LOCATED NEAR UTILITY METER EXAMPLE
Electrical Diagram Notes


Ground mount

Ground Mount Fencing Required
Mesh/Scrim
Compiled from public records, 2026. Requirements change with code cycles and local amendments. Verify with the County of Calvert (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.