Electricians in Maryland — ZIP code directory
292 ZIP codes indexed across 24 counties. Humid summers and winter storms drive HVAC, surge, and generator planning. EIA's 2024 table puts the state residential average at 17.86 cents/kWh, 1.38 cents above the national average of 16.48 cents/kWh. Rates affect operating cost, not the decision to call. Pick your county below, then your ZIP, for local notes written for homeowners.
Browse by county
Montgomery County 34 ZIPs
- Bethesda 20814
- Chevy Chase 20815
- Bethesda 20816
- Bethesda 20817
- Olney 20832
- Brookeville 20833
- Poolesville 20837
- Boyds 20841
- Rockville 20850
- Rockville 20851
- Rockville 20852
- Rockville 20853
- Potomac 20854
- Derwood 20855
- Ashton 20861
- Burtonsville 20866
- Clarksburg 20871
- Damascus 20872
- Germantown 20874
- Germantown 20876
- Gaithersburg 20877
- Gaithersburg 20878
- Gaithersburg 20879
- Gaithersburg 20882
- Montgomery Village 20886
- Kensington 20895
- Silver Spring 20901
- Silver Spring 20902
- Silver Spring 20903
- Silver Spring 20904
- Silver Spring 20905
- Silver Spring 20906
- Silver Spring 20910
- Takoma Park 20912
Prince George's County 32 ZIPs
- Accokeek 20607
- Brandywine 20613
- Cheltenham 20623
- Beltsville 20705
- Lanham 20706
- Laurel 20707
- Laurel 20708
- Bladensburg 20710
- Mount Rainier 20712
- Bowie 20715
- Bowie 20716
- Bowie 20720
- Bowie 20721
- Brentwood 20722
- Clinton 20735
- Riverdale 20737
- College Park 20740
- Capitol Heights 20743
- Fort Washington 20744
- Oxon Hill 20745
- Suitland 20746
- District Heights 20747
- Temple Hills 20748
- Glenn Dale 20769
- Greenbelt 20770
- Upper Marlboro 20772
- Upper Marlboro 20774
- Hyattsville 20781
- Hyattsville 20782
- Hyattsville 20783
- Hyattsville 20784
- Hyattsville 20785
Baltimore County 31 ZIPs
- Baldwin 21013
- Cockeysville 21030
- Freeland 21053
- Glen Arm 21057
- Kingsville 21087
- Lutherville Timonium 21093
- Monkton 21111
- Owings Mills 21117
- Parkton 21120
- Perry Hall 21128
- Phoenix 21131
- Randallstown 21133
- Reisterstown 21136
- Sparks Glencoe 21152
- Upperco 21155
- White Marsh 21162
- Woodstock 21163
- Towson 21204
- Gwynn Oak 21207
- Pikesville 21208
- Sparrows Point 21219
- Middle River 21220
- Essex 21221
- Dundalk 21222
- Halethorpe 21227
- Catonsville 21228
- Parkville 21234
- Nottingham 21236
- Rosedale 21237
- Windsor Mill 21244
- Towson 21286
Anne Arundel County 28 ZIPs
- Lothian 20711
- Laurel 20724
- Churchton 20733
- Deale 20751
- Fort George G Meade 20755
- Shady Side 20764
- Harwood 20776
- Arnold 21012
- Crownsville 21032
- Davidsonville 21035
- Edgewater 21037
- Gambrills 21054
- Glen Burnie 21060
- Glen Burnie 21061
- Hanover 21076
- Linthicum Heights 21090
- Millersville 21108
- Odenton 21113
- Crofton 21114
- Pasadena 21122
- Riva 21140
- Severn 21144
- Severna Park 21146
- Brooklyn 21225
- Curtis Bay 21226
- Annapolis 21401
- Annapolis 21403
- Annapolis 21409
Baltimore (city) County 20 ZIPs
- Baltimore 21201
- Baltimore 21202
- Baltimore 21205
- Baltimore 21206
- Baltimore 21209
- Baltimore 21210
- Baltimore 21211
- Baltimore 21212
- Baltimore 21213
- Baltimore 21214
- Baltimore 21215
- Baltimore 21216
- Baltimore 21217
- Baltimore 21218
- Baltimore 21223
- Baltimore 21224
- Baltimore 21229
- Baltimore 21230
- Baltimore 21231
- Baltimore 21239
Frederick County 18 ZIPs
Harford County 17 ZIPs
Howard County 14 ZIPs
Carroll County 12 ZIPs
Charles County 11 ZIPs
Calvert County 10 ZIPs
Cecil County 9 ZIPs
Washington County 9 ZIPs
Wicomico County 8 ZIPs
St. Mary's County 7 ZIPs
Worcester County 6 ZIPs
Caroline County 5 ZIPs
Queen Anne's County 5 ZIPs
Talbot County 4 ZIPs
Dorchester County 3 ZIPs
Kent County 3 ZIPs
Allegany County 2 ZIPs
Garrett County 2 ZIPs
Somerset County 2 ZIPs
Services covered statewide
Panel upgrade
Assessment of load center capacity (commonly 100A vs 200A), breaker space, and labeling for added HVAC, EV, or remodel loads.
Wiring and rewiring
Branch circuits, aluminum-to-copper remediation topics, grounding and bonding, and bringing older runs up to current practice.
Indoor and outdoor lighting
Recessed, landscape, and security lighting layouts, switching, dimming compatibility, and wet-rated fixtures.
Whole-home generators
Transfer-switch types, load prioritization, fuel choices, and placement and noise considerations.
EV charger circuits
Dedicated 240V circuits, load calculations before adding Level 2 charging, and panel-space planning.
Electrical inspections
Pre-purchase and safety inspections: devices, GFCIs/AFCIs where required, panel condition, and documentation.