Is South Portland, Maine Good for Airbnb Investment?

South Portland defines a short-term residential rental as a temporary rental for fewer than 30 consecutive days. The City registration rules require registration before legal advertising or operation. Chapter 14, Article XVII sets different owner-occupancy and zoning rules for hosted and non-hosted rentals, and it imposes a seven-consecutive-day minimum stay on non-hosted rentals.

Published September 28, 2026 | Updated October 9, 2026 | By STR Search | 6 min read
Find a Short-Term Rental Property in South Portland
South Portland, Maine market research

South Portland, Maine Airbnb Investment Overview

JurisdictionConfirm the exact parcel
Local approvalVerify current official rules
TaxesConfirm State and local duties
UnderwritingUse property-specific scenarios
Decision point

Confirm South Portland STR Eligibility

The South Portland STR ordinance separates Hosted Home Stays from Non-Hosted Home Stays.

  • Hosted Home Stays require owner occupancy and are allowed in all zoning districts.
  • Non-Hosted Home Stays are prohibited in residential and residential conditional or contract zoning districts.
  • The City rental-type summary supports initial classification before an address-specific review.
Local approval

Complete Annual South Portland Registration

The City STR program requires registration before advertising or operating a short-term rental.

Operating rules

Apply Hosted and Non-Hosted Limits

The South Portland STR ordinance limits both rental types to two guests per bedroom and six guests total.

  • Hosted rentals may include all or part of a dwelling and require the owner to be present as specified by the ordinance.
  • Non-hosted rentals require stays of at least seven consecutive days and fewer than 30 consecutive days.
  • Non-hosted guest stays may end early only when the unit remains vacant through the minimum seven-day period.
Property screening

Determine Maine Lodging Tax Duties

The Maine Revenue Services lodging bulletin states that the current tax rate on rentals of living quarters is 9%.

Underwriting

Underwrite Verified South Portland Inputs

Property-level underwriting should use verified acquisition costs, comparable bookings, operating expenses, and the registered capacity and rental-type restrictions established by the South Portland STR ordinance.

  • Model hosted and non-hosted operations separately because the ordinance applies different owner-presence, zoning, and minimum-stay rules.
  • Include financing, utilities, cleaning, maintenance, insurance, platform fees, taxes, reserves, and management.
  • Stress-test lower booked nights, higher repairs, tax changes, and capital work before purchase.
Contacts and support

South Portland, Maine STR Contacts

Route each question to the office that controls the decision or record.

Property selection and setup support: Plan a South Portland Property Strategy Call

Sources and review

South Portland, Maine Official Sources

South Portland, Maine decision questions

South Portland, Maine Airbnb Investment FAQs

How do I start a short-term rental in South Portland, Maine?

Classify the rental as hosted or non-hosted under the South Portland STR ordinance, confirm address eligibility, and submit the annual City registration with payment and required attachments before advertising or operating.

How should I identify suitable South Portland STR properties?

Compare the property’s zoning, structure type, owner-occupancy facts, and parking against the City STR ordinance. Review flood exposure, permit records, title, and private restrictions separately.

Does South Portland require short-term-rental registration?

Yes. The City STR program requires registration before legal advertising or operation. The registration process requires an annual application, payment, and applicable supporting documents.

What determines legal STR eligibility in South Portland?

The South Portland STR ordinance makes rental type, owner occupancy, structure type, zoning district, registration, fire inspection, parking, and insurance relevant to City eligibility. Review private restrictions separately because they may independently prohibit or limit short-term rentals.

What operating limits apply to South Portland STRs?

The City STR ordinance limits occupancy to two guests per bedroom and six guests total. Non-hosted rentals require a stay of at least seven consecutive days and fewer than 30 consecutive days. Hosted rentals follow owner-presence requirements.

What lodging tax applies to South Portland short-term rentals?

The Maine Revenue Services lodging bulletin states that rentals of living quarters are taxed at 9%. Registration, collection, platform, casual-rental, filing, and remittance duties depend on the transaction and operator facts described in the bulletin.

What costs belong in a South Portland STR budget?

Include acquisition and closing costs, financing, required work, furnishings, utilities, cleaning, maintenance, insurance, platform fees, management, lodging tax, registration costs, and reserves.

How do I estimate South Portland STR profitability?

Use the registered guest capacity and hosted or non-hosted operating limits in the South Portland STR ordinance, defensible comparable rates and booked nights, booking-channel terms, the lodging-tax treatment in the Maine Revenue Services lodging bulletin, and complete property-specific expenses. Test lower revenue and higher expense cases.

How do I calculate a South Portland investment return?

Calculate cash flow after operating expenses and debt service, then divide annual cash flow by total cash invested for a cash-on-cash estimate. Keep appreciation and tax outcomes separate unless supported by qualified advice and verified assumptions.

Who can help with South Portland STR due diligence?

The City Licensing Administrator handles registration, Code Enforcement handles code and complaint follow-up, the Assessing Office provides property records, and the Cumberland County Registry of Deeds provides recorded documents. STR Search offers private property-selection and setup support.