DC investors who master OTR property tax and recordation tax still lose deals at DSCR refi when they ignore DC Water — specifically the Clean Rivers Impervious Area Charge (CRIAC). Unlike a line item you can appeal at OTR, CRIAC is impervious-surface math: roofs, driveways, and parking pads mapped to Equivalent Residential Units (ERUs) at a rate that rises every fiscal year.
Hub: DSCR loans Washington DC · mixed-use financing · OTR tax guide
Official sources: DC Water — Impervious Area FAQs · FY2025 CRIAC Report (PDF)
What CRIAC is — and why investors miss it
The Clean Rivers Project (~$3.27B federally mandated) reduces combined sewer overflows. DC Water recovers part of the cost through CRIAC rather than volume-only billing — large impervious footprints pay more than compact rowhouses.
| Term | Meaning |
|---|---|
| ERU | Equivalent Residential Unit — statistical median impervious area for a DC single-family lot |
| FY2026 rate | $24.23 / ERU / month (DC Water FAQs) |
| FY2025 rate | $21.23 / ERU / month (prior year comparison) |
Measurement pause: DC Water paused new ERU measurement rollouts until FY2029 (Oct 2028) after community feedback — but annual rate adjustments continue. Do not assume your ERU count is frozen forever; verify current bill classification at acquisition.
ERU tiers — typical rowhouse vs large footprint
From DC Water residential ERU schedule (Impervious Area FAQs):
| Impervious area (sq ft) | ERUs | FY2026 monthly CRIAC |
|---|---|---|
| 700–2,099 | 1.0 | $24.23 |
| 2,100–3,099 | 2.4 | $58.15 |
| 3,100–7,099 | 3.8 | $92.07 |
| 7,100–11,099 | 8.6 | $208.38 |
| 11,100+ | 13.5 | $327.11 |
Investor triggers for higher ERUs: rear parking pad, large addition footprint, corner lot with extended driveway, mixed-use retail slab, multifamily with extensive roof area.
Bloomingdale flood diligence is separate from CRIAC — but both hit NOI on the same DC Water bill.
Full utility stack on DSCR pro forma
DC Water bills combine:
| Charge | Investor note |
|---|---|
| Volumetric water/sewer | Tenant-paid vs landlord-paid — verify lease |
| CRIAC | Often landlord-paid on small multifamily |
| PILOT / ROW fees | Pass-through on DC Water invoice |
| Water service replacement fee | Periodic capital charge |
Underwriters stress actual bills, not Zillow estimates. Request 12 months of DC Water history at diligence.
Worked DSCR example — Hill East legal two-unit
Property: $795K appraised row, legal main + basement, landlord-paid water/sewer.
| Expense line | Monthly | Annual |
|---|---|---|
| Gross rent (documented leases) | $5,400 | $64,800 |
| Vacancy 5% | $270 | $3,240 |
| OTR property tax | $520 | $6,240 |
| Insurance | $185 | $2,220 |
| Maintenance 7% | $378 | $4,536 |
| CRIAC (1.0 ERU) | $24 | $291 |
| Water/sewer (landlord-paid) | $165 | $1,980 |
| Management 8% | $432 | $5,184 |
| NOI (simplified) | ~$3,426 | ~$41,109 |
| PITIA @ 70% LTV, 8.75% | ~$3,880 | $46,560 |
| DSCR | ~0.88 | Fails |
Same deal — tenant-paid utilities:
| Adjusted NOI | ~$3,591/mo | DSCR ~0.93 — still thin |
Fix paths: Higher rent ($5,650/mo documented), lower LTV (65%), or buy basis $50K lower. CRIAC alone did not kill the file — understated utility stack did.
Compare: DSCR Hill East corridor comps.
Mixed-use and 5+ unit — ERU stacking
Mixed-use investor guide properties often carry nonresidential ERU classification — parking lots and commercial frontage jump tiers. On a Georgia Avenue four-unit with ground-floor retail:
- Model 2.4–3.8 ERUs until you pull the actual DC Water account
- Add $700–$1,100/yr vs naive 1.0 ERU assumption
- BEPS and CRIAC both hit 5+ unit stacks — BEPS guide
CRIAC vs property tax — different appeals
| Issue | Agency | Investor action |
|---|---|---|
| Assessed value | OTR | Appeal cycle — OTR guide |
| ERU measurement | DC Water | Verify footprint; pause on re-measurement until FY2029 |
| Rate increases | DC Water Board | Budget 3–5% annual escalation in 5-year hold models |
Acquisition diligence checklist
- Request 24 months DC Water bills — seller or tenant-paid?
- Note ERU count on bill face — not just dollar total
- Walk rear yard for impervious additions not on old surveys
- On mixed-use, split commercial vs residential meter logic with counsel
- Model $24.23/ERU/mo minimum on row stock; stress 2.4 ERU on large footprints
- Add CRIAC to DSCR calculator expense line — not buried in “misc”
Financing connection
Thin DC DSCR is often a basis problem masked as a rate problem. Operators who document accurate utility loads qualify for DSCR Washington DC at 5.75%–10.5% with the correct LTV tier — operators who omit CRIAC get surprised at underwriting.
Bridge phase: Hard money carry includes tax + insurance + utilities on vacant rehab — turn water on during demo and budget minimum charges.
Five-year hold — CRIAC escalation stress
Budget annual CRIAC rate increases even when ERU count is stable. Illustrative hold on 1.0 ERU row:
| Fiscal year | Rate/mo (illustrative) | Annual CRIAC |
|---|---|---|
| FY2025 | $21.23 | $255 |
| FY2026 | $24.23 | $291 |
| FY2027+ | +3–5% stress | $300–$320 |
On a $720K hold targeting 5.5% cap, $35/year CRIAC growth is noise — but on a 1.05 DSCR file, every $50/mo expense moves the ratio ~0.02. Stack CRIAC with OTR reassessment after rehab and you can lose refi headroom without a rent bump you may not be allowed to take under rent control.
Tenant reimbursement — lease language
| Utility | Typical lease | DSCR note |
|---|---|---|
| CRIAC + water/sewer | Landlord-paid on many row leases | Full expense in NOI |
| Submetered unit | Tenant-paid | Verify meter legality on basement units |
| RUBS allocation | Pro-rata on 2–4 units | Document in lease for underwriter |
Illegal basement without CO cannot be billed separately — another reason ADU legalization precedes DSCR.
DMV comparison — why Arlington bills differ
Arlington DSCR properties use Arlington County / Virginia American utility structures — no DC Clean Rivers mandate on the same invoice. Investors comparing $685K Petworth vs $625K Ballston two-units must compare total utility stack, not just OTR tax. Cross-border guide · Montgomery vs DC tax friction
CRIAC — DSCR stabilization gates (2026)
Files fail when sponsors paste $150/mo utilities from a suburban OM onto a DC row. Pull 12 months DC Water before LOI.
- ERU count on bill face — not guessed from satellite map
- Landlord vs tenant paid — matches executed lease
- CRIAC + PILOT + ROW in expense line — not buried in “taxes”
DC DSCR hub · DSCR calculator · (833) 264-7776
Second worked example — Petworth four-unit with 2.4 ERU
Profile: $1.02M four-unit row, rear addition + parking pad, 2.4 ERU per DC Water bill.
| Expense line | Monthly | vs naive 1.0 ERU model |
|---|---|---|
| CRIAC | $58.15 | +$33.92/mo error if underwritten at $24.23 |
| Water/sewer (landlord-paid) | $280 | Same |
| Gross rent | $9,200 | — |
| NOI delta from ERU mistake | ~$407/yr — small alone |
At 1.05 DSCR on 70% LTV, $407/yr is not fatal — but stacked with $150/mo utility underestimate, missing management, and 5% vs 8% vacancy, the file drops 0.06–0.08 DSCR — enough to fail.
Vacant rehab — minimum water charges
During hard money rehab, DC Water account stays active. Budget:
- Minimum volumetric charges during demo (toilets, hose bibs)
- CRIAC accrues even at zero occupancy
- Account setup / transfer delay at close — 2–4 weeks without bill history
Model $75–$150/mo utility minimum on vacant carry alongside 10.5% IO.
Cap rate vs DSCR — why CRIAC hits both
| Metric | CRIAC impact |
|---|---|
| Cap rate | Lower NOI → higher implied cap on same price |
| DSCR | Lower NOI → lower ratio at same LTV |
| Cash-on-cash | Direct expense hit on levered returns |
Institutional buyers normalize CRIAC in 5.65% multifamily caps (Matthews Q2 2026). Small sponsors using Zillow cap rate calculators without DC Water line items overstate yield by 25–75 bps.
Side-by-side — Petworth row vs Arlington duplex
| Line | Petworth 2-unit (1.0 ERU) | Arlington 2-unit |
|---|---|---|
| Basis | $685K | $625K |
| Gross rent | $5,100/mo | $4,650/mo |
| OTR tax | Higher | Lower — tax friction guide |
| CRIAC | ~$291/yr | $0 (no Clean Rivers line) |
| Compliance stack | BBL/RAD/TOPA | Lighter |
| DSCR @ 70% LTV | Often 0.85–0.95 | Often 1.0–1.08 |
Same investor capital — suburban ratio frequently wins on month-one DSCR even when DC appreciation thesis is stronger. Run both on the DSCR calculator same day.
Portfolio scale — CRIAC on 10+ doors
Sponsors with 10–20 DC units see CRIAC compound:
| Portfolio | ERU assumption | Annual CRIAC (FY2026) |
|---|---|---|
| 10 rows @ 1.0 ERU | 10.0 | ~$2,910 |
| 5 rows + 2 large footprint @ 2.4 | 9.8 | ~$2,850 |
| 1 mixed-use @ 3.8 ERU | 3.8 | ~$1,105 |
Portfolio refinance DC underwriters aggregate actual bills — not per-door averages from a single Petworth comp.
PILOT and ROW — read the full invoice
DC Water bills include Payment in Lieu of Taxes (PILOT) and Right-of-Way (ROW) fees tied to utility infrastructure — separate from OTR property tax. Investors who dedupe “taxes” into one OTR line understate expenses by $30–$80/mo on some accounts. Request a line-item bill explainer from DC Water customer service at acquisition.
CRIAC diligence — pre-LOI script
Ask the seller or property manager:
- “What is the ERU count on the current DC Water bill?”
- “Are utilities landlord-paid or tenant-paid per lease?”
- “Any rear addition or parking pad since last ERU assignment?”
- “Can you provide 24 months of DC Water invoices?”
If answers are vague, assume 2.4 ERU on any row with rear parking pad until proven otherwise.
--- Rates and ERU assignments change with DC Water board orders. Verify current bills for your parcel.
Related: OTR property tax · Rowhouse DSCR hold math · BRRRR strategy
Pre-qualify for DC DSCR · (833) 264-7776
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