Metal roofs in Washington, DC: a change of material is not “in kind”
The District's building code lists roof covering among work that needs no permit when it is replaced in kind, which it defines as a like material that copies the old one. Metal over slate, shingle or tile is a different material, so ask in the right order: the permit office, then the preservation office, then anyone else with a say.
The call ladder
Which District office hears about a metal roof first, and when can you stop climbing?
This page is a map of questions, not a ruling on your address.
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First, the Department of Buildings: is this replacement in kind?
Section 105.2 of the DC building code, as a commercial site reproduces it, lists “roof covering or coping” among work that needs no permit when it is replacement in kind, and defines that as a feature of “like material.” Slate, asphalt shingle and clay tile are not metal. Our reading is that a switch to metal falls outside the exemption. Put exactly that question to the Homeowner's Center.
Its page lists roof repair or replacement with no structural change for one- and two-family homes.
Stop here if DOB says the block is not in a historic district and no other review applies -
Second, the Historic Preservation Office: does the block sit in a historic district?
DOB points historic-district roofing to its Historic Property Special Permit and tells applicants to confirm with the Office of Planning before they file. The office's expedited list covers roofing that is in kind or compatible. If the work is compatible and fits Review Board standards, staff can clear it. If not, the Historic Preservation Review Board hears it. None of these pages says which metals or seam styles will pass, so order nothing on a guess.
Stop here if the office confirms in writing that your scope is cleared -
Third, only in Georgetown: the Old Georgetown Board
The Commission of Fine Arts says the board reviews alterations visible from public space and that staff judge visibility on site. Its FAQ names rooftop vents and condensers but does not say whether a roof covering needs the board, so ask staff directly.
Skip this rung if the address is outside Georgetown -
Last, whoever owns the roof
In a condo or co-op the board or manager decides. Ask for the rule in writing.
Who to ask
Which phone number goes with which question about a District metal roof?
Numbers are from each office's own page, checked 2026-10-11.
| Office | Phone | What its page says |
|---|---|---|
| DOB Homeowner's Center | (202) 671-3500 | Roof repair or replacement, no structural change; historic properties use the Special Permit |
| Historic Preservation Office | (202) 442-7600 | In-kind or compatible roofing can be cleared by staff; otherwise it goes to the Review Board |
| Old Georgetown Board staff | (202) 504-2200 | Reviews alterations visible from public space; meets monthly except January and August |
“Metal” is not one answer
Copper, zinc, galvanized steel and aluminum are different materials, and the preservation office's guideline treats them separately.
What the preservation office wrote
Where does metal sit in the District's own roof guideline?
The Office of Planning's roof guideline names metal first among the common sloping-roof materials, ahead of slate, clay tile, asphalt shingles and wood.
On metal itself, the guideline says appearance comes from three things: the type of metal, how it is finished and how the sections are joined. It names copper, lead and terne plate as nineteenth-century choices and zinc and galvanized steel as early twentieth-century ones.
The order of preference is the part owners miss. Keep what exists, repair only the damaged areas in kind, replace the whole material in kind, and consider a substitute only after those are found not technically or economically feasible. Our reading is that a metal roof over a slate pent roof would count as a substitute in that sequence; ask the office.
The guideline's substitute table lists aluminum and synthetic slate against historic sloping-roof coverings and tells owners to consult the office before proceeding.
Pent roofs and parapets
Is the small sloped band over a rowhouse bay the roof that review looks at?
The guideline calls pent roofs prevalent on rowhouses and other flat-roof buildings and says they are commonly covered with slate, asphalt shingles or clay tile. Metal is not on that short list, which is why a metal pent roof raises the in-kind question at the first call.
The guideline does note metal copings on parapets and sheet-metal cornice details. For how metal roofing is built in general, see the metal section of our materials guide.
Before you call
What should you have in hand before dialing the first office?
- The existing material, namedSlate, shingle, tile or older metal.
- Whether the block is a historic districtAsk; do not guess from the street.
- Photos from the streetReview turns on what is visible.
- Who owns the roofAn owner, a condo board or a manager.
- The metal you have in mindCopper, zinc, steel or aluminum, raised or flat seams.
FAQ
Straight answers on metal roofing under the District's rules
Does the District treat metal over shingles as in kind?
The code defines in kind by like material. Asphalt shingle is not metal, so our reading is no. Ask DOB to confirm for your scope and keep the answer in writing.
Does a metal roof on a District rowhouse always need Historic Preservation Office review?
Only in a historic district or where another review applies. Confirm district status with the Office of Planning.
Which metals does the guideline mention?
Copper, lead, terne plate, zinc and galvanized steel as historic roof metals, and aluminum as a listed substitute for historic sloping-roof coverings.
Is standing seam the same as raised seam?
Yes. The guideline's footnote gives standing-seam as another name for raised-seam joints, which it says give a ribbed appearance.
Does the Old Georgetown Board have to see a roof replacement?
The Commission of Fine Arts FAQ says the board reviews alterations visible from public space but does not address roof coverings either way. Call the board's staff before you order anything.
Who decides if I live in a condo building?
The condo board or building manager decides what goes on the shared roof. The city's questions come after that answer.
Nearby
Where else do we work across the District line?
Back to the Washington, DC overview for the permit table, housing mix and Georgetown. Across the river, Arlington and Alexandria follow Virginia rules instead. See the whole service area list or read about King's Roofing.
Official pages used, checked 2026-10-11: DOB Homeowner's Center, DOB Historic Property Special Permit, Office of Planning work qualifying for HPO review, Historic Preservation Office, DC Roof Guidelines (PDF), Old Georgetown FAQs, DC building code 105.2 (commercial reproduction).
Talk through the next step
Talk through your roof with King's Roofing
Share the address, what you are seeing on the roof and the decision you need to make. We will tell you what to expect before anything is scheduled.
9220 Topaz St, Fairfax, VA 22031
Mon to Fri 7 AM to 8:30 PM, Sat 7 AM to 8 PM, closed Sunday