Manufactured homes are permitted on individual lots, subject to all of the following design standards. Manufactured dwellings relocated into the city shall conform to city standards. The following standards do not apply to units existing within the city prior to February 3, 2012; provided, that they were lawfully established. See also §§ 153.041 and 153.042 regarding mobile homes.
(A) Floor plan. The manufactured home shall be multi-sectional and have an enclosed floor area of not less than 1,000 square feet.
(B) Roof. The manufactured home shall have a pitched roof with a slope not less than three feet in height for each 12 feet in width (14 degrees).
(C) Residential building materials. The manufactured home shall have exterior siding and roofing which in color, material and appearance are similar or superior to the exterior siding and roof material used on nearby residences (e.g., horizontal wood or wood-appearance siding is considered “superior” to metal siding and roofing).
(D) Garages and carports. If the manufactured home has a garage or carport, the garage or carport shall be constructed of materials like those used on the house.
(E) Thermal envelope. The manufactured home shall be certified by the manufacturer to meet the thermal envelope requirements equivalent to those for a single-family dwelling constructed under the State Building Code, being ORS 455.010 et seq. Evidence demonstrating that the manufactured home meets “Super Good Cents” energy efficiency standards, or equivalent standard, is deemed to satisfy the exterior thermal envelope certification requirement.
(F) Placement. The manufactured home shall be placed on an excavated and back-filled foundation and enclosed at the perimeter such that the manufactured home is located not more than 16 inches above grade and complies with the minimum set-up standards of the adopted State Administrative Rules for Manufactured Dwellings, OAR Chapter 918. Where the building site has a sloped grade, no more than 16 inches of the enclosing material shall be exposed on the uphill side of the home;
(G) Floodplain. Manufactured homes, when placed in a flood hazard area, pursuant to OAR Chapter 52.9, shall comply with the following supplemental standards.
(1) The stand shall be a minimum of 12 inches above base flood elevation (BFE) unless the foundation wall is opened on one side or end so that floodwater cannot be trapped. (See § 4-3.1(5) of the Manufactured Dwelling Specialty Code.)
(2) The bottom of the longitudinal chassis frame beam in A Zones and the bottom of the lowest horizontal structural member supporting the dwelling in V Zones shall be a minimum of 12 inches above BFE. (See the definition of “lowest floor” in the Manufactured Dwelling Specialty Code, being OAR 918-460-0000 to 918-460-0500.)
(3) The manufactured dwelling shall be anchored to prevent flotation, collapse or lateral movement during the base flood. Anchoring methods may include, but are not limited to, use of over-the-top or frame ties to ground anchors (reference FEMA’s Manufactured Home Installation in Flood Hazard Areas guidebook for anchoring techniques, 44 C.F.R. § 60.3(c)(6)).
(4) Electrical crossover connections shall be a minimum of 12 inches above BFE. (See § 6-4.2(1) of the Manufactured Dwelling Specialty Code.)
(H) Foundation skirt. The foundation area of the manufactured home shall be fully skirted with concrete, horizontal wood or vinyl siding or other materials, pursuant to applicable building codes.
(I) Prohibited. The manufactured home shall not be located in a designated historic district.
(Ord. 1267, passed 1-3-2012) Penalty, see § 153.999