DC Rent Increase Laws: Caps, Notice Rules, and Challenges

Under DC rent increase laws, a landlord of a rent-controlled unit can raise rent only once every 12 months, by no more than the regional CPI-W plus 2%, with a hard ceiling of 10% in any case. For the 2026 adjustment year, the Rental Housing Commission set CPI-W at 2.1%, so the maximum standard increase is 4.1%, and 2.1% for elderly tenants or tenants with disabilities.¹ These caps apply only to units covered by the Rent Stabilization Program. A landlord who ignores the rules can be ordered to refund the overcharge, pay treble damages for bad-faith violations, and face civil fines up to $5,000 per violation.²

Is Your Unit Rent-Controlled

The Rental Housing Act of 1985 covers most rental units in DC by default and then carves out exemptions.³ If your unit isn’t in one of the exempt categories, it’s covered and the caps below apply.

The main exemptions:

Buildings whose permit was issued after December 31, 1975, or units added to existing buildings with a certificate of occupancy for housing use issued after January 1, 1980.⁴
Federally or District-owned units, and units where the mortgage or rent is subsidized by the federal or District government, including Low-Income Housing Tax Credit properties. These follow separate subsidy formulas.⁴
Buildings with four or fewer rental units owned by no more than four natural persons, as long as none of those owners holds an interest in any other DC rental property. The owner must file a claim of exemption with the Rent Administrator and report ownership changes that affect eligibility within 30 days.⁴

Every rental unit, covered or exempt, has to be registered with the Rental Accommodations Division (RAD). Covered units receive a registration number, exempt units an exemption number.⁵ If you don’t know your unit’s status, RAD and the Department of Housing and Community Development can confirm it.

How Much Rent Can Go Up Each Year

For an occupied rent-controlled unit, the annual increase is capped at the CPI-W adjustment of general applicability plus 2%, and the total can never exceed 10% in a single year.⁶ CPI-W rarely runs anywhere near 8%, so in most years the formula itself does the limiting. The 2026 cap is 4.1%.¹

Only one increase is allowed every 12 months. The narrow exception is a vacancy adjustment, discussed below.⁶

Lower Cap for Elderly Tenants and Tenants With Disabilities

Tenants who are 62 or older or living with a disability get a different formula. Their increase is limited to CPI-W alone, with no 2% add-on, and an absolute 5% ceiling.⁷ In years when the Social Security cost-of-living adjustment runs lower than CPI-W, the landlord must use the lower of the two figures.⁶ For 2026, the effective cap is 2.1%.¹

This protection is not automatic. You have to register your elderly or disability status with RAD. Without that filing, your landlord can lawfully charge the standard rate even if you’d otherwise qualify.

Vacancy Increases Follow Different Rules

When a rent-controlled unit becomes vacant, the standard annual formula doesn’t apply. Under § 42-3502.13, the housing provider may raise rent by up to 10%, or up to 30% if needed to match the rent of a comparable unit in the area.⁶

Once a vacancy increase has been applied, no further increase is allowed for 12 months, even if another vacancy occurs in that window.⁵ The rule stops landlords from cycling through short-term tenants to ratchet rent up repeatedly.

Required Written Notice Before Any Increase

An increase doesn’t take effect on announcement. No increase is valid until the first day rent is normally due that falls more than 60 calendar days after the tenant receives written notice.⁸ If rent is due on the first and your landlord hands you a notice on March 15, the earliest the new rent can begin is June 1.

Notice can be delivered by hand to the tenant or left with a responsible person at the tenant’s place of business, left at the tenant’s home with a person of suitable age and discretion, or sent through the U.S. Postal Service properly stamped and addressed.⁸ Improper delivery can void the increase outright. A notice slipped under the wrong door, or one you never received, doesn’t meet the standard.

What the Landlord Must Have in Order First

Timing and math aren’t enough. Several prerequisites have to be satisfied before any increase is lawful.

The building must be registered with RAD. A housing provider who fails to register on time cannot implement any rent increase until registration is completed and any penalty is paid.⁴ Registration requires housing business license numbers, certificates of occupancy where required by law, and copies of those documents.

The unit and common areas must also be in substantial compliance with DC housing regulations. If the Department of Buildings has issued violation notices for problems like mold, lead paint, or broken essential systems, the Rent Administrator can deny or roll back the increase.⁹ This is one of the strongest practical tools tenants have. A landlord who lets conditions slide loses the right to charge more until the problems are addressed.

When Landlords Can Petition for a Larger Increase

A landlord who believes the standard cap doesn’t cover the property’s costs can petition RAD for a larger increase. These petitions aren’t rubber stamps. Tenants get notice, can participate in hearings, and can oppose the request.⁵

A hardship petition is available when the property’s rate of return falls below 12%; the Rent Administrator reviews the building’s income and expenses before approving any increase.¹⁰ A capital improvement petition lets the landlord pass through the cost of major depreciable work, spread over 96 months for building-wide improvements (surcharge capped at 20% above current rent) or 64 months for improvements to specific units (capped at 15%). The surcharges end once the landlord recovers the costs, and the rent is recalculated without them.¹¹ A services and facilities petition supports an increase tied to new amenities, and 70% or more of a building’s tenants can enter a voluntary agreement with the landlord to set rent levels, adjust services, or fund improvements.¹²

Challenging an Increase You Think Is Illegal

If something about your increase looks wrong, you can file a Tenant Petition/Complaint with RAD. The usual grounds:

The increase exceeded the allowable amount.
You didn’t get proper written notice before it took effect.
The building wasn’t registered with RAD.
The landlord didn’t file the required rent increase forms.
The unit had outstanding housing code violations when the increase was imposed.

Bring proof of tenancy (rent receipts, canceled checks, or a copy of your lease), a copy of any notice you received, and four copies of your petition and supporting documents. Petitions go to RAD at the Department of Housing and Community Development, 1800 Martin Luther King, Jr. Avenue SE, Washington, DC 20020. Filing promptly protects your right to a refund of overcharges and strengthens the record.

What a Landlord Owes for Breaking the Rules

A landlord who knowingly charges more than the legal maximum owes the tenant the excess. If the overcharge was in bad faith, the landlord owes treble damages on that excess.²

Civil fines come on top. Willfully collecting a disapproved increase, filing false statements, or otherwise violating the Rental Housing Act can bring fines up to $5,000 per violation. Discrimination against elderly tenants or families with children carries the same fine for a first offense and up to $15,000 per violation for repeat offenses. A landlord who frivolously challenges a tenant’s registered elderly or disability status is liable for 2% to 100% of the unit’s total annual rent, with treble damages available on top.²

1
Office of the Tenant Advocate. RHC Publishes New Rent Increase Caps: 2.1% for Elderly/Disability Tenants, 4.1% for Other Rent-Controlled Tenants
2
D.C. Law Library. District of Columbia Code 42-3509.01 – Penalties
3
Rental Housing Commission. Rental Housing Act and Regulations
4
D.C. Law Library. District of Columbia Code 42-3502.05 – Registration and Coverage
5
Department of Housing and Community Development. Rent Control Fact Sheet
6
D.C. Law Library. District of Columbia Code 42-3502.08 – Increases Above Base Rent
7
Rental Housing Commission. Rent Adjustments
8
D.C. Law Library. District of Columbia Code 42-3509.04 – Service
9
D.C. Law Library. District of Columbia Code 42-3502.08(Perm) – Increases Above Base Rent
10
D.C. Law Library. District of Columbia Code 42-3502.12 – Hardship Petition
11
D.C. Law Library. District of Columbia Code 42-3502.10 – Petitions for Capital Improvements
12
D.C. Law Library. District of Columbia Code 42-3502.15 – Voluntary Agreement