The full Mallick Plumbing & Heating team with their service vehicles

Where We Work

Explore the communities and ZIP codes Mallick serves below. Call to confirm service at your address. Emergency calls are answered 24/7.

Call (301) 804-6759

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30+ Years 30+ Years Serving Maryland

24/7 Service 24/7 Emergency Service

WSSC Licensed WSSC Licensed & Insured

Locally Owned Locally Owned and Operated

Our Service Map

See Where We Work

The map highlights our core Maryland and Washington, DC communities. Select a pin to explore a local page, or check the full ZIP code list below.

Our locations City we serve Full county coverage Partial coverage: southern Carroll, NW DC & Prince George’s Partial-area shading is approximate. Call to confirm service for your address. Map data © OpenStreetMap contributors

Pick Your Town

Local Communities We Cover

Each page highlights the plumbing considerations specific to that community, including local water providers, permitting requirements, and the types of plumbing systems commonly found in local homes.

Our service ZIP codes include the communities below. Some mailing areas cross county lines; coverage and scheduling depend on your exact address. Select a linked community for its local plumbing guide.

Montgomery County

Ashton, MD

Aspen Hill, MD

Barnesville, MD

Beallsville, MD

Bethesda, MD Boyds, MD

Brinklow, MD

Brookeville, MD

Burtonsville, MD

Cabin John, MD

Chevy Chase, MD Clarksburg, MD Damascus, MD Darnestown, MD

Derwood, MD

Dickerson, MD

Gaithersburg, MD

Garrett Park, MD

Germantown, MD

Glen Echo, MD

Kensington, MD

Montgomery Village, MD

North Bethesda, MD North Potomac, MD Olney, MD Poolesville, MD Potomac, MD Rockville, MD

Sandy Spring, MD

Silver Spring, MD

Spencerville, MD

Takoma Park, MD

Washington Grove, MD

Wheaton–Glenmont, MD White Oak, MD

Frederick County

Adamstown, MD

Buckeystown, MD

Frederick, MD Green Valley, MD

Ijamsville, MD

Linganore, MD

Middletown, MD

Monrovia, MD

Mount Airy, MD

New Market, MD

Point of Rocks, MD

Tuscarora, MD

Walkersville, MD

Howard County

Clarksville, MD

Columbia, MD

Cooksville, MD

Dayton, MD

Ellicott City, MD

Fulton, MD

Glenelg, MD

Glenwood, MD

Highland, MD

Laurel, MD

Lisbon, MD

Savage, MD

Simpsonville, MD

West Friendship, MD

Woodbine, MD

Carroll County

Marriottsville, MD

Sykesville, MD

Woodbine, MD

Prince George's County

Beltsville, MD

College Park, MD

Greenbelt, MD

Hyattsville, MD

Laurel, MD

Mount Rainier, MD

Riverdale, MD

Takoma Park, MD

Washington, DC (selected areas)

Washington, DC

Fairfax County

Greenway, VA

Herndon, VA

McLean, VA

Reston, VA

Vienna, VA

West McLean, VA

Loudoun County

Ashburn, VA

Sterling, VA

Postal community names: GeoNames, used under CC BY 4.0. Postal facility codes remain in the complete ZIP list below.

The full Mallick Plumbing & Heating team together with their service vehicles — The Mallick team, serving homes and businesses across our service area.

Check Your Area

ZIP Codes We Serve

Mallick provided these 198 service ZIP codes. Open your area below to find yours. Call us to confirm scheduling and availability for your exact address.

Maryland (129)

20697
20704
20705
20707
20709
20712
20723
20725
20726
20738
20740
20741
20742
20759
20763
20770
20777
20782
20783
20787
20788
20797
20810
20811
20812
20813
20814
20815
20816
20817
20818
20824
20825
20827
20830
20832
20833
20837
20838
20839
20841
20842
20847
20848
20849
20850
20851
20852
20853
20854
20855
20857
20859
20860
20861
20862
20866
20868
20871
20872
20874
20875
20876
20877
20878
20879
20880
20882
20883
20884
20885
20886
20889
20891
20892
20894
20895
20896
20897
20898
20899
20901
20902
20903
20904
20905
20906
20907
20908
20910
20911
20912
20913
20914
20915
20916
20918
20993
20997
21029
21036
21042
21043
21044
21045
21046
21104
21150
21701
21702
21703
21704
21710
21717
21723
21737
21738
21754
21765
21769
21770
21771
21774
21777
21784
21790
21793
21794
21797

Washington, DC (53)

20001
20002
20003
20004
20005
20006
20007
20008
20009
20010
20011
20012
20015
20016
20017
20018
20024
20033
20036
20037
20038
20045
20052
20053
20057
20059
20064
20202
20204
20228
20230
20240
20245
20260
20307
20317
20319
20390
20405
20418
20427
20506
20510
20511
20520
20535
20540
20551
20553
20560
20565
20566
20593

Northern Virginia (16)

20146
20149
20163
20167
20192
20195
20196
22067
22095
22096
22103
22106
22107
22108
22109
22183

Worth Knowing

Where The County Line Changes The Job

Maryland does not have one answer for any of this. WSSC Water bills and permits across Montgomery and Prince George’s. Frederick City and Frederick County run their own. Howard County has its own bureau, and DC Water covers the District.

That is four different permitting authorities inside one service area, and it changes who inspects the work, how long it takes to schedule, and occasionally what is allowed to be installed. It is also why a plumber who works one county is not automatically set up to work the next.

We pull the permit as part of the job rather than leaving it with the homeowner, whichever authority it belongs to.

Not sure if we reach you? Call and ask.

The community pages and ZIP codes above are a guide. If you are unsure about your address, our office will tell you whether we can help.

Call (301) 804-6759