Montgomery County Rent Stabilization: What Landlords Need to Know

More than half of renters in Montgomery County, Prince George's County, and Baltimore County are cost-burdened — spending over 30% of their income on housing. That statistic sits at the heart of why both Montgomery and PG Counties have enacted rent stabilization ordinances, and why investors targeting those markets need to understand the rules before underwriting a deal based on unlimited rent growth.

Rent stabilization doesn't necessarily kill returns. But it changes the calculus in ways that catch investors off-guard.

Montgomery County Rent Stabilization

Montgomery County enacted rent stabilization as part of a broader housing policy response to its affordability crisis. The program caps annual rent increases for covered units and requires landlords to comply with specific notice and documentation requirements.

What's covered: The ordinance applies to most residential rental units in Montgomery County, with notable exemptions.

Key exemptions:

• Units built within the last 10 years (new construction exemption)
• Single-family homes and owner-occupied properties with four or fewer units
• Subsidized affordable housing units with their own contractual rent restrictions
• Units that have undergone substantial rehabilitation meeting specific cost thresholds

Allowable increase: Montgomery County ties allowable rent increases to a formula based on the Consumer Price Index (CPI). The precise cap changes annually. For lease renewals, landlords must provide proper written notice (typically 60 days for increases above a certain threshold) and document that the increase falls within the allowable percentage.

Vacancy decontrol: When a tenant voluntarily vacates, Montgomery County allows landlords to reset rent to market rate before the next tenancy. This is an important feature — it means the cap doesn't trap you at below-market rents indefinitely. It only limits how fast you can raise rents on a sitting tenant.

Hardship exemptions: Landlords can petition for a higher increase if they can demonstrate operating cost increases — rising property taxes, insurance costs, or capital improvements — justify going above the standard cap. The petition process involves filing documentation with the county and may involve a hearing.

Practical implication for investors: If you're acquiring a Montgomery County rental with a long-term tenant at below-market rent, run the numbers on the CPI-based cap. If market rent is $2,400 and the sitting tenant pays $1,800, you may need years to close that gap through allowable annual increases — or you wait for turnover and reset to market.

Prince George's County Rent Stabilization

PG County has its own rent stabilization program that applies to multifamily rental properties. The county's program shares some structural similarities with Montgomery's but has its own specific rules and thresholds.

What's covered: PG County's ordinance targets larger multifamily buildings. Single-family rentals and small landlords have historically had more flexibility, but the program has expanded over time in response to affordability pressure.

Allowable increase: Like Montgomery County, PG County ties annual increases to CPI, with a cap on the maximum percentage increase per year regardless of CPI movement. The cap creates a ceiling even in high-inflation years.

New construction exemption: Properties newly constructed or substantially rehabilitated within a recent window are exempt from the cap for a period of years. This is why much of PG County's new multifamily development underwrites without rent stabilization assumptions.

The cost-burden context: Over half of PG County renters are cost-burdened. The county's proximity to the federal employment corridor — Andrews Air Force Base, NASA Goddard, the federal agencies in Suitland — creates high but income-constrained tenant demand. Rents in the $2,300-$2,800 range for SFRs reflect that market ceiling.

Vacancy decontrol in PG County: PG County's program also includes vacancy decontrol provisions, allowing market-rate resets between tenancies. The stabilization applies to in-place tenancy increases, not to market rents for new leases.

How Rent Stabilization Affects Investment Property Analysis

Cap rate compression: If you're underwriting a 7% cap rate based on market-rate rent with 3-5% annual rent growth assumptions, and the property has a long-term tenant at 80% of market, your actual near-term cap rate is lower. Stabilization delays the path to full market rent.

Hold period matters: Investors planning to flip after 2-3 years need to account for whether they'll reach market rents in that window. Investors planning 10+ year holds benefit from the vacancy decontrol mechanism — turnover will eventually let them reset.

Exit valuation: When you sell, the next investor will underwrite on actual in-place rents, not market rents. If your stabilized rents are below market, your exit cap rate is compressed relative to a comparable market-rate building. This is a real drag on IRR for stabilized properties with long-term tenants.

New construction strategy: Both counties' new construction exemptions explain why some investors target value-add plays in recently permitted buildings — you can capture rent growth during the exempt period to achieve stabilized cash flow, then rely on vacancy decontrol once stabilization kicks in.

What Maryland Does Not Have

Maryland does not have statewide rent control. The county-level programs are enacted locally, and most Maryland counties have no rent stabilization at all. Baltimore City has been discussing but has not enacted citywide rent stabilization as of 2025 — Baltimore's rental market benefits from different dynamics (higher vacancy rates, more distressed inventory) that make stabilization politically less urgent.

Howard County, Anne Arundel County, and most other Maryland counties operate without any rent increase restrictions. Investors targeting those markets can underwrite rent growth based on market conditions without a regulatory cap.

Navigating Compliance

If you own or are acquiring stabilized units:

1. Register with the county housing department — both Montgomery and PG County require rental registration for covered units
2. Document every rent increase with proper notice (timing and form matter for enforceability)
3. Track the annual CPI-based cap — counties publish updated rates, typically effective January 1
4. Understand the hardship petition process — if you're making capital improvements, you may be able to pass through costs above the standard cap
5. Get vacancy decontrol in writing when a tenant vacates — confirm in your files that the reset was based on a voluntary vacancy before setting new rent

Rent stabilization is one layer of the Maryland regulatory environment that affects projected returns. The Maryland Investment Property Guide covers stabilization rules alongside transfer taxes, landlord-tenant law, and county-specific market analysis — everything in one place so you can underwrite accurately before committing capital.

See more Maryland guides →