No structure may be erected or constructed in the town except on a building lot meeting the requirements of this chapter.

The only structures permitted in the town are single-family dwelling units and structures accessory thereto, or duplexes. No more than one duplex or one single-family dwelling unit with one accessory dwelling unit, subordinate to and either attached to or detached from the single-family dwelling unit, may be constructed on a single building lot that meets the minimum lot size required for the principal unit.

The town may not prohibit the sale or other conveyance of a condominium unit independently of a principal unit solely on the grounds that the condominium unit was originally built as an accessory dwelling unit (RCW 36.70A.681(1)(k)).

The accessory dwelling unit floor area shall be a minimum of 400 square feet (exclusive of related garage area), a maximum of 1,250 square feet, and it shall include separate living, sleeping, eating, cooking and sanitation facilities which are independent from the primary unit.

The only exception to subsections (1) and (2) of this section shall be those structures deemed necessary for the maintenance and operation of the town's water system or for other public purposes as authorized by the council.

Conversion of an existing non-conforming structure, such as a detached garage, to an accessory dwelling unit is allowed so long as all other parking requirements are met.

House trailers, campers, caravans and all other vehicles or structures adapted to serve as movable or portable living quarters may not be used as living quarters within the town of Beaux Arts Village, upon public or private property, except that a member of the household of a resident or temporary guests of a resident of the town may use such living quarters upon the premises and with the consent of such resident for a period not exceeding 14 consecutive days.

The accessory dwelling unit shall meet all technical code standards in BAVMC Title 15, including, but not limited to, environmental, building, electrical, fire, and plumbing code requirements.

The town is not authorized to allow construction of buildings and structures in locations where such development is restricted under other laws, rules, or ordinances due to its physical proximity to critical areas, or other unsuitable physical characteristics or a property. All development within the town, therefore, will be reviewed for consistency with any existing and future critical area protection ordinance provisions, and shall be allowed only when consistent. All development must be designed and located to avoid critical area impacts including providing for mitigation as defined in WAC 197-11-768.

Critical areas include the following: