Residential Rentals in Warren

The Town of Warren requires all residential rental units—whether short-term or long-term—to meet minimum safety and zoning standards. These rules apply whether you’re renting a single room, an apartment, an accessory dwelling unit (ADU), or a whole house.

This page outlines what’s required before you rent a unit and what steps to take if you’re converting part of a structure (like a garage or basement) into a rental.

1. Certificate of Occupancy (COO)

All residential rentals must have a valid Certificate of Occupancy on file with the Town.

  • A COO confirms the rental unit has passed a life safety inspection and is approved for residential use.

  • COOs for rental units are valid for five (5) years from the date of issue.

  • Property owners are responsible for scheduling a re-inspection before the certificate expires to maintain legal rental status.

2. Zoning and Use Compliance

Not all properties in Warren are eligible for rental use, especially for:

  • Short-term rentals (less than 30 days)

  • Multi-unit properties

  • Accessory dwellings or converted spaces (garages, basements, etc.)

Owners must verify the zoning district allows the type of rental they intend to offer.

3. Life Safety Requirements

Before a unit can be rented, it must meet the following minimum safety standards:

  • Working smoke and carbon monoxide detectors

  • Two safe means of egress (usually a door and a window)

  • Safe stairs, railings, decks, and walking surfaces

  • Functioning heating, plumbing, and electrical systems

  • No structural deficiencies or obvious hazards

An inspection will be scheduled as part of the COO application or renewal process.

Short-Term Rentals (Less Than 30 Days)

Short-term or vacation rentals (e.g., AirBnB or seasonal stays) are subject to the same safety standards and require a valid COO. Additional requirements may apply based on:

  • Zoning

  • Occupancy levels

  • Parking and trash management

Owners offering short-term stays in a converted structure or outbuilding must also follow change-of-use procedures.

Long-Term Rentals (30 Days or More)

Long-term residential rentals must also:

  • Maintain an active COO

  • Comply with zoning and building codes

  • Be inspected every 5 years (or sooner, if conditions change)

This includes:

  • Renting out a second unit in a two-family home

  • Creating an ADU or in-law apartment

  • Basement, attic, or garage apartment conversions

Change of Use or Unit Conversion

If you’re converting a part of your home or another structure into a residential rental, this is considered a change of use and must be reviewed by the Code Enforcement Office.

You’ll need to:

  • Submit a Change of Use application

  • Possibly obtain building and plumbing/electrical permits

  • Pass a life safety inspection

  • Obtain or update your COO

Enforcement & Penalties

Renting a unit without a valid COO or failing to comply with life safety standards may result in:

  • Notices to vacate

  • Daily fines until compliance is achieved

  • Ineligibility to rent the property

The Town takes tenant safety and housing code compliance seriously and will respond to complaints or observations of unsafe or unapproved rentals.

Questions or Ready to Begin?

Contact the Code Enforcement Officer at (207) 273-2421 or ceo@warrenmaine.org for:

  • Zoning verification

  • COO applications or renewals

  • Change-of-use questions

  • Scheduling inspections