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County of Harford (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 INTERNATIONAL BUILDING CODE

2021 INTERNATIONAL RESIDENTIAL CODE

2021 INTERNATIONAL MECHANICAL CODE

2021 INTERNATIONAL PLUMBING CODE

2021 INTERNATIONAL FUEL GAS CODE

2021 INTERNATIONAL ENERGY CONSERVATION CODE

2021 INTERNATIONAL EXISTING BUILDING CODE

2021 INTERNATIONAL SWIMMING POOL AND SPA CODE

2023 NATIONAL ELECTRICAL CODE HARFORD COUNTY COUNCIL BILL 19-032

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
1
Rough Inspection
None
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

All roof planes with solar need a 36in pathway to ridge

You cannot use the neighbor's house for pathways or coverage calculations

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
#8

Electrical

Electrical Load Calcs Required
Derates
Allowed POI
PV Breaker,Load Side Taps,Meter Adapter,Line 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 Fused disconnect needed inside and non fused outside if lineside tap in Main panel If a lineside tap this AHJ requires a fused disconnect inside the home and a non fused outside with the system.

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
  • If a fused disconnect is required indoors, use a flush-mounted breaker housing instead of a surface-mounted knife-blade switch for better aesthetics.
  • For line-side taps in the main panel:
  • Fused disconnect must be installed inside the home.
  • Non-fused disconnect must be installed outside.
  • Neutrals and grounds must be bonded in the fused disconnect.
  • ICM meters are not allowed.
  • Inspect the service cable for fraying. If damaged, it must be replaced prior to installation to pass inspection.
Roof Plan


Custom Placards Required
0

Ground mount

Ground Mount Fencing Required
Mesh/Scrim
Ground Mount Notes

Show distance between GM array and all property lines/structures.

Compiled from public records, 2026. Requirements change with code cycles and local amendments. Verify with the County of Harford (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.