Manufactured Homes

Siting a Manufactured Home on an Individual Lot


Manufactured HomeThe following is a brief summary of the City of Grants Pass regulations governing the siting of manufactured homes on individual lots. These regulations can be found in the City of Grants Pass Development Code Sections 22.330 and 22.400.

In most cases, a manufactured home can be placed on a lot where a conventional single family home would be allowed. Homes are not allowed on certain lots, such as lots which do not have frontage on a street, lots without access to public sewer, or lots zoned for industrial use. If there will be more than one dwelling on the lot, special rules apply.

Manufactured Home Criteria


All manufactured homes on individual lots must meet the Manufactured Home Construction and Safety Standards Act of 1974 of the U.S. Department of Housing and Urban Development, as amended. A red seal bearing the Insignia of Compliance and date of manufacture will be affixed to the unit showing that it meets this standard.

In addition, the manufactured home must meet the following criteria:
  • Size: The manufactured home shall be multisectional and enclose a space of not less than 1000 square feet.
  • Roofing: Roofing shall be three in twelve pitch, minimum, and shall have composition or wood shingles, shakes or similar material.
  • Siding Material: Siding material shall be wood or masonry, or material that gives the appearance of wood or masonry.
  • Additions and Accessory Buildings: A garage or carport must be constructed on the same lot as the manufactured home. A garage is required if over 50 percent of the adjacent lots which have a dwelling unit also have a garage. Additions, attachments and accessory buildings, such as porches, garages, etc. shall be constructed according to the Oregon Residential Specialty Code. The exterior of any such addition shall be constructed of wood or masonry or material that gives the appearance of wood or masonry.
  • Architectural Features. The unit must have two of the following for the first 40 feet of building length, and one additional for each 30 feet of length:
    • A roof overhang of one foot or greater along the full face.
    • A break in the normal roof elevation of three or more feet in height, such as a dormer or hip roof.
    • A recess with a minimum depth and width of three feet, such as an entry.
    • A permanent extension with a minimum depth and width of three feet and height of eight feet, such as a bay window or a covered deck, porch, or patio.
    • A permanent uncovered deck, porch, or patio with a minimum depth and height (including railing) of 3 feet, and a minimum length of 15 feet.
  • Thermal Envelope: The manufactured home shall be certified by the manufacturer to have an exterior thermal envelope meeting performance standards which reduce levels equivalent to the performance standards required of single-family dwellings constructed under the state building code as defined in ORS 455.010.
  • Foundation: The manufactured home shall be placed on an excavated and backfilled foundation and shall be enclosed at the perimeter with cement blocks or concrete such that the manufactured home is located not more than 12 inches above grade. The Building Official may modify this requirement as necessary due to topographic conditions such as a sloping lot, drainage problems, or location in the floodplain.
Used units must be certified upon inspection by the Building Official to be in excellent condition and safe and fit for residential occupancy. New and used units must be installed according to the 2010 Manufactured Dwelling Installation Specialty Code (PDF).

Improvement Requirements


All parking and driveway areas must be surfaced with asphalt or concrete, or an approved pervious pavement alternative. If your street has curb and gutter, you must have a concrete drive approach. Typically, sidewalks must be installed along the frontage of the property. If your street does not have curb and gutter, you may have to dedicate additional right-of-way, sign a Deferred Development Agreement and post a cash deposit for future street improvements.

Installation of landscaping is required prior to occupancy as outlined in the Residential Landscape Standards of the Development Code Section 23.031.

Required Permits


Manufactured homes on individual lots are treated the same as any built single-family home and are required to obtain permits for manufactured home placement, electrical service connection, and sewer and water connections. These permits will include System Development Charges (PDF) as they apply to single-family residences.

An encroachment permit may be required before starting any work in the public right-of-way, including sidewalk and drive approach installation, installation of utilities, and installation or removal of trees. If you plan to remove an existing home from your property, we recommend that you wait to remove the home until your new permit is ready to be issued.

Manufactured Dwelling Parks


Development standards for Manufactured Dwelling Parks are governed by Oregon Administrative Rule 918 Division 600 as administered by the Oregon Department of Commerce. The rule covers standards for construction, plan review, inspections, setbacks, space coverage, skirting and other park requirements. These OAR standards apply except where other standards in the City of Grants Pass Development Code Section 22.340 are more restrictive. View In-Park Manufactured Home Placement Checklist (PDF) online.

Manufactured Home On Lot