First, decide which fight you are in
There are two different things an owner can be appealing, and they go to different places. The first is the designation itself: DOB says the building is vacant and you say it is not, or you say it is vacant but qualifies for an exemption. That is a DOB matter under D.C. Code §42-3131.05. The second is the tax classification on the bill, which OTR applies under D.C. Code §47-813 once DOB tells it the building is vacant. Win the first and the second follows, one tax period at a time. Skip the first and argue only with OTR, and you will usually be told the bill matches the DOB record and there is nothing to correct. Start with DOB.
Step 1: read the notice and calendar the 15 days
The designation notice goes to the owner of record at the mailing address OTR has on file. It names the property by address and square and lot, gives a case or notice number, states the designation, and states your response rights. The response window is 15 days from the notice. That is the single most important number in the whole process. Miss it and the designation stands, the building goes on the public vacant property list, and you move into the slower reconsideration route while the Class 3 rate is already on the bill.
Count from the date on the notice, not the date you opened it. If the notice went to an old address or a deceased relative, the clock still ran. Fix the mailing address on MyTax.DC.gov the same day so the next letter reaches you.
Step 2: file the Vacant Building Response Form
The 15 day petition is filed on the Vacant Building Response Form, the same document DOB uses for exemption requests. It goes through DOB's online vacant buildings portal, which gives you a submission record, or by paper at the permit center. Our exemption form guide walks through every field. The form asks you to take one of two positions:
- The building is occupied. Attach the current lease, utility bills showing real consumption, and an owner occupant affidavit if you live there. A gas bill with zero therms does not prove anyone lives in the house.
- The building is vacant but exempt. Check exactly one exemption category and attach its matching document: the active permit for construction, the MLS sheet for a single family house on the market, the Superior Court case number for probate. Each category has a maximum duration, from half a tax year for a pending permit application up to 3 tax years for active construction, and a property gets at most 5 exemption years in any 12 year period.
Do not check several boxes hoping one sticks. Do not write a narrative with nothing attached. The petition is decided on paper by someone who has never seen the house, so the attachments are the case.
Step 3: the Mayor's determination, within 60 days
Once the petition is in, the District has 60 days to issue a final determination. In practice DOB may send an inspector back out, ask for more documents, or both. Answer every request promptly and keep copies of everything you send. If the determination comes back in your favor, DOB updates its record and notifies OTR, and the classification comes off the next half year bill. If it comes back against you, the letter will say why, and that reason is what the next step is built on. Our article on fixing a denied exemption covers the four reasons that account for most denials.
Step 4: request a status review hearing
A denial is not the end of the DOB route. Owners can request a status review hearing, where the file is looked at again with the owner present. This is the point where cases most often turn, because it is the first time a person, rather than a form, is judging whether the building is occupied or qualifies for an exemption. Bring the same evidence as before plus anything that answers the denial letter directly: photos dated after the inspection, the permit that was pending and has since issued, the signed lease that started after the inspector's visit. Present it in the order the denial raised it.
Open violations sink hearings. If the denial mentions unabated violations, close them before the hearing date and bring the closure record. A building with a clean violation history and a documented exemption is a short hearing. A building with three open violations is a hearing about the violations, no matter what the owner came to say.
One caution on timing. The code sets three clocks: 15 days to petition, 60 days for the District to decide, and 45 days after the notice of final determination to appeal to RPTAC. It sets no separate deadline for a hearing request. The 45 days count from the date on the notice of final determination, and RPTAC may not extend that window. Ask for the hearing as soon as the denial arrives, and keep the RPTAC date on the calendar while it is pending.
Step 5: 45 days to appeal to RPTAC
If the designation is upheld after the hearing, the formal appeal is to the Real Property Tax Appeals Commission, and the window is 45 days. This is the backstop, not the plan. RPTAC appeals are slower and more formal, and the commission's own form asks you to state your justification and attach supporting documents, so a thin DOB file still makes a thin appeal. File it if you have a real case and the clock is running out, but keep working the DOB correction route at the same time. The two are not exclusive, and a DOB correction that lands while the appeal is pending resolves the matter faster than the commission will.
What happens to the bill while you wait
Nothing pauses. The Class 3 rate stays on the bill through every step above, and the half year due dates of March 31 and September 15 do not move. On a $500,000 assessment that is $12,500 per half instead of about $2,125. Pay it. An unpaid half picks up penalty and interest and can end up in the annual tax sale, which adds an investor's costs to what you already owe. When the designation is lifted, OTR corrects the period and the difference comes back as a refund or credit. Refund claims have a time limit, so an overpaid period should be claimed as soon as the correction posts. The math behind the numbers is in our article on how the vacant tax is calculated.
The evidence that wins, in one list
- A lease or affidavit with dates that cover the inspection date.
- Utility bills showing consumption, not a bare account in good standing.
- The permit number, MLS listing, or probate case number that matches your exemption box.
- Dated photos of every opening secured and the yard maintained.
- Closure records for any violation the inspector cited.
- Proof of submission for every filing, with the date visible.
When to do it yourself and when to hand it off
The 15 day response is the easy part of this process. The part that goes wrong is everything after it: an exemption granted while the rate stays on the bill, a category that expires before the next bill, a denial nobody answers. We handle the whole route, from the DOB record to the corrected OTR bill, for a flat $1,500 per tax period corrected, paid up front. If OTR does not correct a period, the $1,500 for that period is refunded in full. Send us the address and the notice and we will tell you which step you are actually on.