Portland, Maine Rent Control 2027: City Sets 2.6% Allowable Increase
Portland, Maine set its 2027 Allowable Increase Percentage at 2.6%. See the City's CPI formula, timing, coverage checks, and official source.
The short answer
The City of Portland announced on September 1, 2026 that the Allowable Increase Percentage under its rent-control ordinance for calendar year 2027 is 2.6%.
That is a Portland-specific figure, not a statewide Maine rent cap. Before applying it to a particular tenancy, verify that the rental is within the City of Portland, confirm the property's current rent-control status, and review the City's current guidance for the specific unit and proposed effective date.
How Portland calculated the 2.6% figure
Portland says City Code Chapter 6, section 6-234(a) sets the annual Allowable Increase Percentage on September 1 and uses 70% of the change in the Consumer Price Index for All Urban Consumers for the Greater Boston metropolitan area over the preceding 12 months.
The City's September 1, 2026 announcement states that the Greater Boston CPI-U advanced 3.7% from July 2025 to July 2026. Applying the ordinance formula produced a 2.6% Allowable Increase Percentage for calendar year 2027.
The calendar year and effective date matter
The City's announcement expressly identifies 2.6% as the Allowable Increase Percentage for calendar year 2027. When checking an actual increase, use the annual figure that applies to the proposed effective date rather than assuming that the year a notice was drafted automatically controls.
Notice timing, lease terms, property coverage and any other City-authorized adjustment process are separate questions. The annual percentage should therefore be treated as one part of the review, not as a substitute for checking the current City rules for the tenancy.
Do not treat 2.6% as a universal Maine limit
The 2.6% figure comes from Portland's local rent-control ordinance. It should not be applied automatically to rentals elsewhere in Maine, and a Portland mailing address alone should not replace a jurisdiction and coverage check.
For a property-specific decision, confirm the exact rental address and current City registration or coverage information using Portland's official rent-control resources before serving, accepting or challenging an increase.
What landlords should verify before serving an increase
Confirm the property's Portland jurisdiction and rent-control status, the current lawful rent, the proposed new rent, the proposed effective date, the lease terms and the latest City guidance. Keep the calculation showing the percentage change and the records used to determine which annual Portland figure applies.
A landlord should not rely on an old annual percentage, a statewide summary or a community post when the City has published a current 2027 figure and property-specific rules may still affect the result.
What tenants should preserve if a notice looks wrong
Keep the lease and renewals, prior and current rent-increase notices, rent ledgers or receipts, the current rent, the proposed rent, the notice date, the proposed effective date, and any City registration or coverage records available for the property.
Those records make it easier to compare the proposed increase with the correct annual Portland figure and to identify whether the dispute is about the percentage, the effective year, property coverage or another part of the City's rent-control framework.
Use Max Rental Tools to compare the proposed increase
Max Rental Tools can calculate the percentage change, organize the rent history, open the Maine rent-increase guide and prepare a rent-increase notice after the applicable local rule has been verified.
For Portland rentals, use those tools alongside the City of Portland sources linked below. The City's current ordinance guidance and property-specific coverage remain controlling over a generic calculator or statewide summary.
Common questions
What is Portland, Maine's Allowable Increase Percentage for 2027?
The City of Portland announced that the Allowable Increase Percentage for calendar year 2027 is 2.6% under the City's rent-control ordinance.
How did Portland calculate 2.6% for 2027?
The City says its ordinance uses 70% of the preceding 12-month change in the Greater Boston CPI-U. Portland reported a 3.7% CPI-U increase from July 2025 to July 2026, producing a 2.6% Allowable Increase Percentage for 2027.
Does the 2.6% figure apply to every rental in Maine?
No. It is a City of Portland rent-control figure. Verify the exact jurisdiction and current property coverage before applying it to a particular rental.
Should I use the 2027 Portland percentage if the notice was written in 2026?
The City's announcement identifies 2.6% as the calendar-year 2027 figure. Review the proposed effective date and the current City rules rather than relying only on the date the notice was drafted.
Official sources
City of Portland — 2027 Allowable Rent Increase AnnouncementCity of Portland — Rent Control & Rental Housing RightsContinue your check
Use the state directory for current jurisdiction-specific rules, calculate the proposed increase, then prepare the appropriate rental document only after the legal-rule checks are complete.