Airbnb Rules Maine: Laws, Regulations, and Compliance Guide

Maine Airbnb Compliance Checklist

• ☐ Confirm Local Zoning Permits STR Use

  • Contact the municipal planning or code enforcement office directly. Zoning classifications vary by town; Portland, Bar Harbor, and South Portland each maintain distinct STR overlay rules.

  • Verify whether the property falls in a zone where short-term rentals are permitted by right, require a conditional use permit, or are prohibited outright.

• ☐ Register with the Municipality

  • Apply for any required local STR license or registration before accepting bookings. Portland requires annual renewal; other municipalities have their own schedules and fees.

  • Obtain the registration number issued by the municipality; it must appear in all listing advertisements where local law mandates disclosure.

• ☐ Register for Maine Sales Tax

  • Register with the Maine Revenue Services to collect and remit the 9% combined lodging tax (8% state sales tax on lodging plus the 1% state lodging tax) on all taxable rental income.

  • Confirm whether the platform (Airbnb, Vrbo, Booking.com) remits this tax on the host's behalf or whether the obligation falls to the host directly.

• ☐ Verify Owner-Occupancy Requirements

  • Determine whether the local ordinance restricts STR permits to owner-occupied properties. Portland's non-owner-occupied permit category carries separate caps and conditions.

• ☐ Install Required Safety Equipment

  • Install smoke detectors in every sleeping room and on every level of the property, per Maine's Innkeepers and Lodging Places statute (30-A M.R.S.A. § 3751 et seq.) and the State Fire Marshal's Office requirements.

  • Install carbon monoxide detectors on every habitable level. Confirm fire extinguisher placement meets local fire code.

• ☐ Check HOA and Deed Restrictions

  • Review HOA bylaws and recorded deed covenants. Neither state law nor municipal ordinances override private contractual restrictions on short-term rental activity.

• ☐ Secure Adequate Insurance

  • Obtain a commercial short-term rental policy or a landlord policy with STR endorsement. Standard homeowner's policies typically exclude rental income liability. Platform host protection programs do not replace primary property insurance.

• ☐ Display Registration Number on All Listings

  • Where required by local ordinance, include the municipal registration number in the listing description on every platform. Omitting it can trigger fines and

1. Regulatory Overview

Navigating short-term rental compliance in Maine isn't simple. It's a three-layer cake. Hosts must satisfy state law, municipal ordinance, and sometimes county zoning, and there's no single statewide licensing regime to make it easy.

A town like Bar Harbor, for instance, even instituted a lottery system in 2021 for new non-owner-occupied permits. And honestly, the municipal rules are often way tougher than what the state requires.

At the state level, Maine's primary framework is Title 30-A of the Maine Revised Statutes, which grants municipalities broad authority to regulate land use, including short-term rentals.

Maine also enacted Public Law 2021, Chapter 670, effective January 1, 2022, which requires platforms and operators to collect and remit lodging taxes under the Maine Revenue Services (MRS) framework. Airbnb regulation in Maine, beyond tax collection, is almost entirely a municipal function.

Maine law does not establish a uniform statutory definition of "short-term rental" at the state level. Most municipalities that have adopted local ordinances define an STR as any dwelling unit rented for periods of fewer than 30 consecutive days, though some jurisdictions use a 28-day threshold.

Hosts must confirm the operative definition in the specific municipality where the property sits.

Don't expect a single statewide hotline for violations. Enforcement authority is purely a local matter.

In Portland, it's the Planning and Urban Development Department that handles STR licensing, but in a smaller town like Ogunquit, you're dealing directly with local code enforcement officers investigating a noise complaint filed after 10 PM.

It's a completely different ballgame from town to town. The only real constant? Maine Revenue Services, which enforces lodging tax obligations for everyone.

2. Registration Requirements

Maine has no statewide short-term rental registration system as of May 26, 2026. There is no state registry, no state-issued STR license number, and no state agency that processes host applications.

Airbnb regulation in Maine operates almost entirely at the municipal level, which means registration obligations depend entirely on which city or town the property sits in.

Municipal Registration Regimes

Several Maine municipalities have enacted local registration requirements. Portland is the most significant example.

Hosts operating under Portland's short-term rental ordinance (Chapter 6, Article IX of the Portland City Code, effective January 1, 2022) must register annually with the City of Portland's Code Enforcement office before accepting reservations.

• Who Must Register: Any operator renting a dwelling unit or portion thereof for periods of fewer than 30 consecutive days within Portland city limits.

• Owner-Occupancy Threshold: Portland restricts non-owner-occupied STR permits in most residential zones. Hosts must demonstrate primary residency; the city does not apply a 183-day rule but requires documented primary-residence status at the time of application.

• Registration Fee: $100 per unit annually for owner-occupied units; $200 per unit annually for non-owner-occupied units where permitted by zone.

• Required Documentation: Government-issued photo ID, proof of primary residence (utility bill or tax record), property deed or lease, and a signed compliance attestation.

• Platform Obligations: Portland does not currently mandate that booking platforms verify registration numbers before publishing listings, though hosts must display their registration number in all advertisements.

Outside Portland, towns including Bar Harbor, Kennebunkport, and Old Orchard Beach have adopted their own local licensing frameworks with varying fees and documentation requirements.

Hosts must contact each municipality's code enforcement office directly to confirm current obligations, as local STR restrictions in Maine change frequently at the town level.

3. Safety, Insurance, and Property Standards Hosts Should Review

Forget about a simple statewide building classification system for short-term rentals as you'd find in New York. It just doesn't exist here. Instead, your property's eligibility is a tangled web of local zoning ordinances, HOA bylaws, and those pesky condominium association rules.

For example, your condo association in Old Orchard Beach might have a bylaw completely forbidding rentals under 28 days. So before you even think about listing, you've got to do your homework at the municipal and association level. Seriously, don't skip this step.

Physical Safety Requirements

Maine's Innkeepers Act (Title 30-A, M.R.S.A. § 3801) and the Maine State Fire Marshal's Office set baseline safety standards that apply to short-term rental properties. Hosts must meet the following minimums:

• Smoke Detectors: Required in every sleeping room and on each level of the dwelling, per Maine Fire Code Section 907.

• Carbon Monoxide Detectors: Mandatory in any unit with a fuel-burning appliance or attached garage.

• Egress: Each sleeping room must have at least one operable emergency exit window or door meeting minimum dimension requirements.

• Fire Extinguisher: A portable extinguisher rated 2-A:10-B: C must be accessible on each floor.

Insurance Considerations

No Maine statute mandates a specific liability coverage amount for STR hosts. Standard homeowner's policies typically exclude commercial rental activity.

Hosts should carry a dedicated short-term rental policy or a rider with a minimum of $1,000,000 in general liability coverage, a threshold most municipalities with local registration ordinances reference informally when reviewing applications.

4. City-by-City Airbnb Restrictions in Maine

Maine has no single statewide operating framework that governs day-to-day STR conduct. The practical rules, guest limits, minimum stays, and host presence are set at the municipal level, and they vary significantly between Portland, Bar Harbor, and smaller towns with their own ordinances.

Guest Limits

• Portland (Chapter 6, Article X): Short-term rental units may not accommodate more than two guests per bedroom, with an absolute cap of ten guests per dwelling unit regardless of bedroom count.

• Bar Harbor (Land Use Ordinance, Article 9): Occupancy is capped at the lesser of two guests per bedroom or the limit established by the property's septic or sewer capacity certification on file with the town.

• Statewide default: Municipalities without an explicit guest-count ordinance fall back to the Maine State Plumbing Code's occupancy load calculations, which are based on fixture unit counts, not bedrooms.

Minimum-Stay Thresholds

• Bar Harbor seasonal restriction: Properties in Bar Harbor's Shoreland Zoning overlay are subject to a 30-night minimum stay between June 15 and September 15 under the 2022 amendment to the town's Land Use Ordinance.

• Portland: No minimum-stay threshold applies under the current Portland Code. Nightly rentals are permitted for licensed operators.

Note: LD 1381 (introduced in the 131st Maine Legislature) would authorize municipalities to impose minimum-stay requirements of up to 30 nights without requiring a separate referendum. The bill remained in committee as of May 2026.

Host Presence Requirements

Portland distinguishes between owner-occupied STRs and non-owner-occupied STRs under Chapter 6, Article X.

Non-owner-occupied units face stricter license caps and are prohibited in certain residential zones. Bar Harbor imposes no host-presence requirement but requires a local contact person reachable within 30 minutes of the property during any active guest stay.

5. Taxes, Fees, and Business Obligations for Maine Airbnb Hosts

State Taxes

Maine imposes two overlapping taxes on short-term rental income. Both are administered by Maine Revenue Services (MRS) under Title 36 of the Maine Revised Statutes.

Let's talk money. The total combined State Tax Rate is a steep 14.5% on your gross rental receipts for any stay shorter than 28 days.

That number isn't a single line item; it's the state's 9% Lodging Tax stacked right on top of the 5.5% general sales tax. It adds up fast. The good news? At least there's no flat registration fee at the state level to worry about.

Local Taxes

Maine municipalities do not currently levy a separate local lodging or sales tax on short-term rentals. No city or county in Maine maintains an independent STR-specific tax regime as of May 2026. The 14.5% state rate is the full tax exposure at the transactional level.

Platform Collection Requirements

Airbnb, Vrbo, and Booking.com are classified as Marketplace Facilitators under 36 M.R.S. Platforms meeting the facilitator threshold, collect and remit both the 5.5% sales tax and the 9% lodging tax directly to MRS on behalf of hosts.

Hosts using these platforms are not responsible for remitting those taxes themselves, but they remain liable if a platform fails to collect correctly.

Tax Filing Requirements

Hosts who accept bookings outside a registered marketplace facilitator (direct bookings, personal websites) must register with MRS, collect both taxes at the point of payment, and file returns on a schedule MRS assigns based on annual volume.

Quarterly filing is standard for most small operators. Failure to register carries penalties under 36 M.R.S. § 187-B, including interest accruing from the original due date.

6. Safety and Building Code Requirements

Mandatory Safety Equipment

• Smoke Detectors: Operational smoke detectors required in every sleeping room, outside each sleeping area, and on every level of the unit, per Maine State Fire Marshal Office standards under the Maine Life Safety Code (NFPA 101, adopted by reference).

• Carbon Monoxide Detectors: Required in any unit with a fuel-burning appliance, attached garage, or forced-air heating system, per Maine Revised Statutes Title 25, Section 2464.

• Fire Extinguisher: A minimum 2A:10 B: C-rated extinguisher must be accessible on each occupied floor.

• Emergency Egress: Each sleeping room must have at least one operable egress window or door meeting minimum opening dimensions under the Maine Uniform Building and Energy Code (MUBEC).

Building Compliance

• Electrical Systems: No exposed wiring, overloaded circuits, or unapproved panel modifications.

• Structural Condition: Stairways, railings, decks, and balconies must be structurally sound and free of hazards.

• Heating: The unit must maintain a minimum interior temperature of 68°F during occupied periods, per MUBEC habitability standards.

Maine does not have a statewide law requiring booking platforms to verify host registrations before processing transactions, block unregistered listings, or submit periodic transaction reports to a state agency.

No statute equivalent to New York City's Local Law 18 of 2022 exists at the Maine state level, and no municipality in Maine has enacted platform-mandate legislation as of May 2026. Compliance responsibility sits entirely with the host, not the platform.

Individual municipalities that require registration, Portland and Bar Harbor among them, enforce those requirements directly against hosts through local code enforcement offices, not through platform-level controls.

Platforms operating in Maine are not subject to statutory penalties for listing unregistered properties under the current Maine short-term rental regulation. Hosts cannot assume a platform's willingness to accept a listing constitutes any form of regulatory clearance.

Maine does not have a statewide statute that prohibits advertising a short-term rental before a booking transaction occurs.

No provision in Title 30-A of the Maine Revised Statutes, nor in any municipal ordinance currently in effect, makes the act of listing or advertising an STR independently unlawful in the way that New York City's Local Law 18 of 2022 does.

Advertising restrictions in Maine, where they exist at all, are embedded within individual municipal licensing frameworks.

Portland's short-term rental ordinance, for example, requires a valid registration number to be displayed in any listing, but that requirement attaches to the listing's content rather than prohibiting the advertisement itself as a standalone act. This section does not apply to Maine under the trigger conditions stated above.

7. Enforcement and Penalties

Don't look for a single statewide enforcement agency for short-term rental violations. There isn't one. Enforcement authority is hyper-local, resting entirely with individual municipalities, which means the penalty structures, detection methods, and appeal processes are wildly different from Portland to Presque Isle.

One town might use monitoring software to find illegal listings and issue a $250-per-day fine, while another relies solely on neighbor complaints. Basically, the rules of the game change every time you cross a town line.

Civil Penalties

• Operating without registration: Up to $500 per day per violation under most municipal codes; some ordinances (including Portland's) authorize fines up to $2,500 per violation for repeat offenders.

• Exceeding occupancy limits: Fines typically range from $100 to $500 per incident, assessed per booking.

• Failure to collect or remit lodging taxes: Maine Revenue Services may assess back taxes plus a penalty of 10% of the unpaid amounts and interest at 7% annually under Maine Revenue Services guidelines.

• Life-safety violations: Municipalities may issue immediate cease-and-desist orders, with daily fines accumulating until the deficiency is corrected.

Enforcement Mechanisms

• Platform data requests: Municipal code enforcement officers may request listing data from platforms to cross-reference active listings against registration records.

• Neighbor complaints: The primary trigger for investigations in most Maine towns; complaints are filed directly with local code enforcement.

• Proactive monitoring: Portland's code enforcement office conducts periodic audits of active listings using publicly available platform data.

• Inspection response: A substantiated complaint can initiate a physical inspection without advance notice under Maine's property nuisance statutes.

Registration Denial and Revocation

• Grounds for denial: Outstanding code violations, unpaid municipal fines, or incomplete application documentation.

• Grounds for revocation: Three or more substantiated violations within a 12-month period (Portland standard); failure to maintain required insurance; documented life-safety deficiencies.

Appeal body: The municipal Board of Appeals

8. Special Considerations

Accessory Dwelling Units (ADUs)

Maine's land use statutes permit ADUs in most residential zones following 2022 legislative changes, but short-term rental use of an ADU triggers separate review in several municipalities. Portland, for instance, requires ADUs used as STRs to hold a standalone short-term rental license distinct from any ADU permit issued under the city's zoning code.

Operating an unlicensed ADU as an STR carries the same $500-per-day penalty structure that applies to other unlicensed rentals in Portland.

• Zoning Overlay Conflict: ADU approval does not automatically authorize transient occupancy; hosts must confirm the use classification with the local code enforcement officer.

• Owner-Occupancy Requirement: Some towns require ADU STR use on the primary dwelling being owner-occupied, mirroring Portland's owner-occupancy rule for hosted rentals.

Condominium and HOA Units

Maine condominium associations may restrict or prohibit short-term rentals through their declarations and bylaws under Title 33 of the Maine Revised Statutes. No state law overrides those private restrictions.

Violations expose hosts to fines set by the association, forced rental termination, and potential legal action by the board, consequences that operate entirely outside municipal licensing channels.

• Declaration Review: Hosts must review the condominium declaration for minimum-stay provisions before listing.

• Board Approval: Some associations require written board approval for any transient use, regardless of municipal permit status.

9. Exemptions

Not all short-term occupancy arrangements in Maine fall under municipal STR registration requirements or the state lodging tax framework.

• Stays of 28 consecutive days or more: These are considered standard residential tenancies under Maine landlord-tenant law and are not subject to STR licensing requirements or the 9% lodging tax.

• Licensed hotels, motels, and inns: These operate under Maine Department of Economic and Community Development lodging licenses and comply with separate inspection and tax regimes distinct from short-term rental ordinances.

• Licensed bed-and-breakfasts: B&Bs holding a valid state innkeeper license are regulated under a separate classification and are not subject to municipal STR registration rules where those rules explicitly carve them out.

• Owner-occupied rentals below local thresholds: Several Maine municipalities exempt owner-occupied properties rented for fewer than a specified number of days per year (commonly 14 days) from registration and inspection requirements.

10. Legislative Developments

Maine has not enacted a statewide short-term rental registration or licensing statute as of May 2026. The most recent enacted change at the state level was the passage of LD 1706 (effective January 1, 2022), which clarified that municipalities hold primary authority to regulate STRs within their boundaries.

No state-level bill amending that framework has been enacted since.

Proposed Reforms (ld 2089)

Introduced during the 2024 legislative session, LD 2089 would have established a statewide STR registry administered by the Maine Department of Economic and Community Development (DECD). Key provisions included:

• Mandatory Registration: All STR operators would register annually with the DECD at a proposed fee of $50 per unit.

• Data Reporting: Platforms would be required to submit quarterly occupancy data to the state.

• Local Preemption Limit: Municipalities could not impose registration requirements stricter than the state standard.

LD 2089 failed to advance out of committee and was not enacted as of May 2026.

11. Resources and Contact Information

Government Agencies

Maine Department of Economic and Community Development (DECD)

• Address: 59 State House Station, Augusta, ME 04333

• Phone: (207) 624-9804

• Website: maine.

Maine Revenue Services (MRS), Sales, Fuel, and Special Taxes Division

• Address: 51 Commerce Drive, Augusta, ME 04330

• Phone: (207) 624-9693

• Website: maine.

Maine State Fire Marshal's Office

• Address: 45 Commerce Drive, Suite 1, Augusta, ME 04333

• Phone: (207) 626-3880

• Website: maine.

Filing Complaints

Suspected unlicensed or non-compliant STR activity is handled at the municipal level. Hosts and neighbors should contact the code enforcement officer in the relevant municipality directly. Most Maine towns publish code enforcement contact details on their official municipal websites.

For lodging tax non-compliance, contact Maine Revenue Services at (207) 624-9693 or submit a report through the MRS online portal at maine.gov.

Disclaimer

This information is provided for general guidance only and does not constitute legal advice. Short-term rental regulations in Maine are complex and subject to change.

Hosts should consult with qualified legal counsel and tax professionals to ensure full compliance with all applicable laws and regulations. The enforcement space continues to evolve, and hosts are responsible for staying informed of current requirements.