A vacant DC rowhouse can look cheap until you read the tax bill. DC taxes vacant buildings (Class 3) and blighted buildings (Class 4) at rates many times the occupied residential rate. The rule was designed to push owners to fix, sell, or occupy empty property. For an investor, that makes the vacant tax class a carrying cost to model and a seller’s motivation to price. It is often the single line that decides whether a flip clears.
This guide is the underwriting side of the topic: rate math, carry tables by assessed value, how registration and exemptions work during a rehab, and two worked deals. For sourcing vacant stock through estates, DHCD programs, and direct outreach, read the DC vacant and blighted property investor blog. For the broader tax system, see the DC property tax and OTR investor guide.
Official references: rates are published by the DC Office of Tax and Revenue. Registration, inspection, and classification run through the DC Department of Buildings.
The rate gap in one table
| Status | Rate per $100 of assessed value (published) | Multiple of occupied rate |
|---|---|---|
| Occupied residential | $0.85 | 1× |
| Class 3 — vacant | $5.00 | ~5.9× |
| Class 4 — blighted | $10.00 | ~11.8× |
The Council has adjusted the vacant and blighted tax structure in recent budget cycles, including proposals for higher rates on long-term vacancy. Check OTR’s current rate table before you model a hold longer than one year.
2026 carry cost table by assessed value
| Assessed value | Occupied (annual) | Class 3 (annual) | Class 4 (annual) | Class 3 per month | Class 4 per month |
|---|---|---|---|---|---|
| $300,000 | $2,550 | $15,000 | $30,000 | $1,250 | $2,500 |
| $450,000 | $3,825 | $22,500 | $45,000 | $1,875 | $3,750 |
| $600,000 | $5,100 | $30,000 | $60,000 | $2,500 | $5,000 |
| $800,000 | $6,800 | $40,000 | $80,000 | $3,333 | $6,667 |
Put those monthly numbers beside your hard money interest. On a $600,000 Class 4 rowhouse, the tax carry is $5,000 a month — often more than the loan interest itself.
How a property becomes Class 3 or Class 4
- The building is unoccupied. DC’s definitions look at occupancy and use, not whether furniture is inside.
- DOB registers or identifies it. Owners must register vacant buildings. Neighbors and inspectors also report them.
- DOB classifies it. Vacant buildings go to Class 3. Buildings DOB finds unsafe, unsanitary, or deteriorated can go to Class 4.
- OTR applies the rate. Classification can change for a half-year or full tax year, depending on timing.
Owners can request an exemption or reclassification when the facts support it. Exemption categories in DC law have included properties under active construction with valid permits, properties actively listed for sale or lease within limits, and certain legal or estate situations. Each has conditions and time limits. Read the current rules on the DOB site and keep copies of everything you file.
Registration and exemption timeline during a rehab
| Week | Action | Why |
|---|---|---|
| Before contract | Pull the OTR tax record and DOB registration status | Know the class you are inheriting |
| Contract | Add a clause requiring the seller to pay classified tax through closing | Avoid inheriting arrears |
| Closing | Register the building in your name if it is still vacant | Non-registration adds penalties |
| Weeks 1–6 | Submit permit applications | Exemption for active construction usually needs permits |
| Permit issued | File the construction exemption request with DOB | Stops or reduces vacant-rate exposure going forward |
| Monthly | Keep inspection records, contractor invoices, and photos | Proves work is active if challenged |
| Certificate of occupancy / lease | Request reclassification to occupied | Returns to the $0.85 rate |
The gap between closing and permit issuance is where most vacant-tax damage happens. DC permits for a gut rehab can take weeks to months, especially in historic districts. Start drawings before you close. The DC permits guide and HPRB guide cover sequencing.
Worked example — Class 3 Trinidad rowhouse, fast permit
Composite. A vacant 1,500-square-foot Trinidad rowhouse assessed at $520,000, classified Class 3. The seller is an estate that has paid vacant tax for two years.
| Line | Amount |
|---|---|
| Purchase | $455,000 |
| Buyer closing (recordation and title) | ~$10,500 |
| Class 3 carry before exemption (4 months × $2,167) | $8,668 |
| Occupied-rate carry during rehab (6 months × $368) | $2,208 |
| Mid-gut rehab (1,500 sf × $130) | $195,000 |
| Hard money interest (10 months, ~11% on ~$600K average balance) | ~$55,000 |
| Resale costs including DC transfer tax | ~$58,000 |
| All-in | ~$784,400 |
| ARV | $865,000 |
| Gross profit | ~$80,600 |
Slow-permit version: if permits take nine months and the exemption never gets filed, Class 3 carry runs about $19,500 before rehab starts. Profit drops to roughly $70,000, and a longer hold adds another $30,000 or so in interest. The same house becomes a thin deal.
Worked example — Class 4 Congress Heights semi-detached, held as a rental
Composite. A blighted semi-detached house assessed at $340,000, classified Class 4 with open DOB violations. Price reflects both.
| Line | Amount |
|---|---|
| Purchase | $235,000 |
| Violation cure and stabilization | $22,000 |
| Class 4 carry for 3 months before exemption ($2,833/mo) | $8,500 |
| Gut rehab (1,450 sf × $160) | $232,000 |
| Hard money carry and closing | $41,000 |
| All-in | $538,500 |
| Appraised value after rehab | $560,000 |
| DSCR refi at 75% LTV | $420,000 |
| Payment at 7.5%, plus taxes ($0.85 rate) and insurance | ~$3,470/mo |
| Rent (4BR, voucher-supported, illustrative) | $3,900/mo |
| DSCR | ~1.12 |
The investor leaves about $118,500 in the deal after refinancing. That is not a full BRRRR. The discount mostly paid for the violation cure and the blight carry. It still produces a covered rental in a neighborhood where finished comps are scarce. See the DC BRRRR strategy guide and Anacostia DSCR loans.
Pricing the seller’s motivation
A Class 3 or Class 4 owner is paying heavily every month. Use that in negotiation, and respect it as a price signal:
| Seller situation | What it tells you |
|---|---|
| Estate paying Class 3 for years | Heirs may accept a clean, fast offer |
| Owner with tax arrears on a Class 4 building | Tax sale risk; see the DC tax sale guide |
| Developer holding a vacant lot-and-shell | Waiting on zoning; may not sell cheap |
| Recently reclassified after a failed rehab | Ask why permits stalled |
Contract clauses worth adding
- Seller pays all classified tax and penalties through closing
- Seller delivers DOB registration and violation history
- Buyer may terminate if a raze order or new Class 4 finding appears before closing
- Seller cooperates with exemption filings if closing and permit timing overlap
Use a DC real estate attorney to draft these. They are planning ideas, not legal language.
Local risk section
| Risk | Impact | Mitigation |
|---|---|---|
| Permit delay | Months of Class 3/4 carry | Start drawings before closing |
| Missing registration | Fines and enforcement | Register at closing |
| Exemption lapses | Rate snaps back to vacant | Calendar every expiration |
| Tenants move out during a hold | Building can become vacant | Track occupancy on rentals too |
| Lead paint on pre-1978 stock | Budget and schedule hit | See the lead paint guide |
| Recordation and transfer tax | 1.45% each above $400K | See the recordation guide |
How Jaken Finance Group underwrites vacant DC stock
We finance vacant and blighted rowhouses as standard DC rehab files: 8.99%–13.5% interest-only, up to 100% LTC on qualified files, capped at 75% of ARV. For the rental exit, DSCR runs 5.75%–10.5%. We ask for the current tax bill, the classification history, and a realistic permit timeline. Then we build the vacant carry into the interest reserve instead of hoping the exemption lands on time.
Related guides
- DC vacant and blighted property investor blog — sourcing and ward-level detail
- DC property tax and OTR investor guide
- DC foreclosure investor guide
- Fix and flip loans Washington DC
- Greater DC investor market report 2026
Pre-qualify for a vacant rowhouse loan · Submit a deal · (833) 264-7776
This page is educational and is not tax or legal advice. Tax rates, classifications, and exemptions are set by DC law, DOB, and OTR and can change. Rates and terms are offered only to qualified borrowers on non-owner-occupied investment property. Composite examples are illustrations, not offers.