The District runs its own permits. One changeout can need two of them, a mechanical permit for the air conditioning side and a boiler permit for anything that burns fuel, and the Department of Buildings will only accept them from a contractor licensed in DC. We hold that license. Nearly a third of the District’s housing was built before 1940, so radiators and boilers are everyday work for us.
Service Areas HVAC Service Across Washington DC, Prince George’s and Montgomery Counties, Southern Maryland and Northern Virginia
Our Heating and Cooling Work Covers the DMV, From Cheverly Outward
Nero’s Heating & Air has worked out of Cheverly since 2019, licensed in Maryland and in DC. We repair and replace furnaces, air conditioners, heat pumps, boilers and water heaters across the District, both Maryland counties, Southern Maryland and Northern Virginia. Wherever the house is, the first visit is the same. We find out what is actually wrong with the system you have before anyone talks about replacing it.
Not sure whether your street is in? Call and we will tell you in under a minute.
Is Your Town on Our Route?
Not sure whether your street is in? Call and we will tell you in under a minute.
Washington, DC
Prince George’s County, MD
Cheverly
Our shop is here. Cheverly is the one town in the area that wants its own permit approved before the county will issue yours, which costs time rather than money. It is also almost entirely detached pre-war housing, which means ductwork added decades after the house was finished. Being down the street also means a short drive to your door.
Upper Marlboro
The county seat, with a historic core dating to the 1730s. Exterior work on a designated property needs a Historic Area Work Permit from the county, and the county lists 324 structures in the Western Branch area as flood prone, which often decides where outdoor equipment can sit. Both are worth checking before you pick a spot for a new unit.
Hyattsville
The city adds no permit of its own, so county DPIE is the only office involved and the timeline is shorter than in Cheverly next door. The trade-off is the housing. A large share of the pre-war stock inside the Beltway was built with radiators and no ductwork, which changes what a heat pump can do here, and ductless is often the cleaner fit.
District Heights
Two homes in three here were built between 1940 and 1979, and 84 occupied units still heat with fuel oil. If yours is one of them, Maryland’s Oil Control Program requires the tank, the supply piping and the fill and vent pipes to come out within thirty days of the decision to close it. That’s a conversation worth having before you plan a changeover.
Also serving across Prince George’s County:
- Bowie
- Laurel
- College Park
- Greenbelt
- Bladensburg
- New Carrollton
- Riverdale Park
- Mount Rainier
- Oxon Hill
- Clinton
- Suitland
- Forest Heights
- Capitol Heights
- Lanham
- Largo
- Glenarden
- National Harbor
- Fort Washington
Montgomery County, MD
Bethesda
Bethesda has no town government, so there is no second permit to chase and the county’s Department of Permitting Services is the only office. One home in three sits in a building of fifty units or more, the highest share in the county, and that is usually what decides where a condenser can physically go, so it’s worth asking about placement early.
Silver Spring
Unincorporated, so the county handles the permit on its own. The housing runs to bungalows, Cape Cods, Colonials and Tudors built between the 1920s and the 1950s. County sensors have recorded Sligo Creek rising ten feet in thirty minutes, which matters if your equipment sits low in Forest Glen, Woodside or East Silver Spring. Raising the outdoor unit on a stand is a simple safeguard.
Rockville
Rockville issues its own mechanical permit through city Inspection Services and the county never sees it, which is the opposite arrangement to most of Montgomery. Just under half the city’s housing dates from 1950 to 1979 and about a third was built in 2000 or later, so the two halves of town need very different conversations, a replacement plan for the older homes and routine upkeep for the newer ones.
Chevy Chase
Most Chevy Chase addresses sit inside an incorporated village layered on top of the county, and the villages protect their street and yard trees under their own codes. Chevy Chase Village requires a Tree Protection Plan before work near them, so it pays to plan the condenser spot early. More than half the housing here was built before 1960.
Kensington
Kensington needs both permits, the county’s first and the Town’s second, which is the reverse of Cheverly’s order and worth knowing before anyone quotes you a date. Just over half the town’s housing was built between 1950 and 1969, and only about one home in nine dates from 2000 or later.
Takoma Park
Laid out as a railroad suburb from 1883, and a quarter of the housing still predates 1940. The town also requires a Tree Impact Assessment before anyone excavates more than three inches deep over more than twenty-five square feet, which a condenser pad can reach on its own, so it’s worth asking about before a new pad goes in.
Gaithersburg
Gaithersburg issues its own residential mechanical permit through city Permitting and Inspections. It also holds the newest housing of any Maryland town on this page, with 57 percent built between 1970 and 1999 and roughly a third since 2000, so the work here is more often a first replacement than a rescue.
Germantown
Germantown is the one place on this page where electricity beats gas, 56 percent of homes against 40, and attached housing outnumbers detached. Both point the same way. Heat pumps are the normal system here rather than the upgrade, so the questions are about defrost behavior and backup heat strips.
Northern Virginia
We cross the river regularly and we work the whole inner ring. Being straight about it: Virginia jobs get worked into the day’s route rather than booked on the spot, so if the timing matters, call and ask what we can do this week before you plan around it.
Serving:
- Alexandria
- Arlington
- Fairfax
- Fairfax City
- Falls Church
- Vienna
- Springfield
- Burke
- Annandale
- Reston
- McLean
- Tysons
- Woodbridge
- Dumfries
- Occoquan
- Manassas Park
Southern Maryland
Calvert County and St. Mary’s are the longest run we make, and we make it. The same rule applies as in Virginia: the schedule depends on the day rather than the address, so ask before you plan around a date. Housing down here runs to larger lots, which usually means propane or oil rather than natural gas, and that changes the replacement conversation entirely.
Serving:
- Lusby
- Prince Frederick
- Solomons
- Saint Leonard
- Huntingtown
- Owings
- Dunkirk
- Chesapeake Beach
- North Beach
- California
Charles County
Waldorf, La Plata and Indian Head sit south of the Beltway traffic and are a straighter run than the mileage suggests. Same scheduling caveat as the rest of the outer ring.
Serving:
- Waldorf
- La Plata
- Indian Head
Anne Arundel County
Annapolis sits at the edge of our route, out past the Beltway toward the Bay. Like the rest of the outer ring, visits get worked into the day’s schedule, so call ahead if the timing matters.
Serving:
- Annapolis
Not Sure If We Reach You?
The list above is every place we actually drive to, not every place we would like to. If your town is not on it, call anyway and we will tell you right away rather than booking a visit we cannot make. Call (202) 750-9543, or send the form and we will come back with the earliest day we have.











