A single-family residence is a structure that is:
- Located on a lot zoned for residential use.
- Approved for occupancy as a permanent, single-family residence by the local governing agency or agencies.
A mobile or manufactured home is considered a single-family residence that also includes the following:
- Is permanently located on a foundation.
- Has all wheels and axles removed.
- Meets all other requirements of a manufactured home placement permit as required by the local governing agency or agencies.
An outbuilding is a stand-alone structure that is located on residential property and is not a living space. Typical outbuildings include:
- Barns (agricultural buildings)
- Pump houses
- Garages
- Shops/storage sheds
All new single-family residences, manufactured homes and outbuildings must meet the specifications in this handbook, Washington Department of Labor and Industries and the National Electric Code (NEC).