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City of Rockville (MD)

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

Codes

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

2021 INTERNATIONAL ENERGY CONSERVATION CODE

2021 INTENATIONAL RESIDENTIAL CODE

2021 INTERNATIONAL FUEL AND GAS CODE

2021 INTERNATIONAL MECHANICAL CODE

2021 INTERNATIONAL SWIMMING POOL AND SPA CODE

2021 INTERNATIONAL BUILDING CODE

2023 NATIONAL ELECTRIC CODE

ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status
Testing
Any SolarAPP+ Restrictions
1
SolarAPP+ Restrictions
MPU,MPU,Derate,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
Top Right

Fire setbacks

Fire Setback Enforced
1
Setback Notes

For photovoltaic arrays occupying more than 33 percent of the plan view total roof area, not less than a 36-inch clear setback is required on both sides of a horizontal ridge. 

Structural & loads

Wind Speed
115
Wind Notes

Exposure Category B

Snow Load
30
Snow Load Notes

ground snow load is 30 psf

Reducible Snow Load Allowed
1
Max Attachment Spacing
96
Structural Notes


Minimum Ground On Roof
#10

Electrical

Electrical Load Calcs Required
Derates
Allowed POI
Meter Adapter,Load Side Taps,Line Side Taps,PV Breaker
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.

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 there is to be a fused disco inside, use a flush-mounted load center with breaker instead of a surface-mounted knife-blade switch. Former is aesthetically pleasing. Latter is not. Check service cable to see if frayed If so will require replacement to pass inspection

Custom Placards Required
0

Ground mount

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