How big can an ADU be in Washington State?

An AADU is limited to 1,000 square feet in a single-family zone, including RSL, and up to 650 square feet in a lowrise zone. The AADU must meet current standards of the Seattle residential, building, mechanical, electrical, energy, land use, environmentally critical areas, and shorelines codes.

Does Seattle allow tiny homes?

According to the Seattle Times, “King County views tiny homes as ‘an affordable and efficient method of providing housing,” and “current building and zoning codes do not specifically define or specially regulate tiny houses, other than requiring they meet all general housing standards.” Furthermore, in 2019, landmark …

How big of a shed can you build in King County without a permit?

You don’t need a permit to build a shed if it meets all of these criteria: The total area (or “footprint”) of the shed’s roof is 120 square feet or less. The shed is a single-story building. The shed sits on a simple concrete slab, pier blocks, or soil.

Can you build a 2 story Adu?

A new ADU, however, can take many forms. It can be attached to an existing home, attached to a garage in the rear of the lot, or detached completely. It can typically be one or two stories, with a maximum height of either 16′ or 25′ (depending on location).

What is Adu and Dadu?

Accessory dwelling units (ADU) are known by many names. A detached additional dwelling unit (DADU) is a separate structure from the main house. Accessory dwelling units may also be attached to or inside of the main home, in which case it’s often called a mother-in-law, granny flat, in-law suite, or garden apartment.

Are tiny homes legal in King County?

King County recognizes tiny homes as an affordable and efficient method of providing housing. The current building and zoning codes do not specifically define or regulate Tiny Homes.

How close to a property line can I build a shed?

You typically can’t build a shed within 10 feet of the rear property line and 15 feet from a side property line. There should be sufficient room between your shed and your neighbor’s yard. If there is any question, review your permit, check with your HOA, or contact your municipality office.

What is an accessory dwelling unit in Seattle?

Seattle: “An accessory dwelling unit or detached accessory dwelling unit (sometimes called a mother-in-law apartment) is a separate living space within a house or on the same property as an existing house. These units aren’t legal unless they have been established through a permit process…”.

What do you need to know about King County WA?

King County: Like other communities, King County has detailed regulations which typically require owner occupancy of the primary or accessory dwelling, a single accessory dwelling on a property, and compliance with regulations on unit size/lot size/parking/etc. as well as building to current codes.

How big does an accessory dwelling unit need to be?

SDCI will report all accessory dwelling unit permits to King County for sewer treatment capacity charges. During your application, you will need to fill out a form acknowleging those capacity charges. An AADU is limited to 1,000 square feet in a single-family zone, including RSL, and up to 650 square feet in a lowrise zone

What are the requirements for an accessory dwelling in Snohomish County?

In most cases, limited to a single accessory dwelling on a property, requirement for owner occupancy in the primary or accessory dwelling, compliance with current building codes and specific regulations on size/lot size/parking/etc. The full details begin with section 30.28.010 in Snohomish County code.