ADU Information

Seattle ADU Information

Are you wondering how you can get more living space on your property? Do you have a garage or a basement on your property? Emerald ADU Builders Seattle can help with garage conversions to create additional living space.

Ready to build? Request a paid Site Visit.

Site visits are required to spec the feasibility, cost, and design of your ADU project. The cost of the Site Visit is applied towards your build.

Please fill out the form to request a paid site visit

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or call (206) 222-2898 for a faster inquiry.

What Are ADUs?

ADUS refers to accessory dwelling units and there are different types to choose from. These are independent and self-contained living spaces, which can be attached or detached from the main house. A good number of homeowners in Seattle have chosen to have ADUS as a way of earning rental income. Besides renting these units out, they can also be used for housing friends and relatives who would prefer to have their privacy while still living in the property area. As a matter of fact, there are many families that choose to stay with their elderly relatives by building such units. Here is some more info about why you should take advantage of this building opportunity!


In 2020, there were significant changes to the ADU Seattle laws in the state of Washington and you can take advantage of this. Emerald ADU Builders Seattle has so much to offer and can help you add an accessory dwelling unit to your property. ADUS is known by different names like granny flats, backyard cottages, in-law flats, companion units, and backyard guest houses among others. Whatever names you may choose to us, the concept is the same; a self-contained living area on the same zoned property.

There are different shapes, styles, and even sizes of ADUs and you will have so many options to play around with. Most ADUs will be between 400 and 1,200 square feet and need to have all the amenities of a common living facility including a bathroom, kitchen, and sleeping area. We are glad to be the leading contractors who will provide the best and functional ADUs within your budget.

Where ADUs Can Be Constructed?

With the new laws that came into existence, you can put up a Seattle ADU on any property that is zoned as a residential area. This applies to multifamily and single-family residential properties. If you are not sure if you are allowed to build an ADU, get in touch with us and we will be glad to provide the relevant information about the same. It is important to note that you will require a building permit to construct an ADU. Our contractors will help you obtain the permits required for building a granny flat on your property.

As for the size, the ADU is expected to be a secondary residence to the main house. As such, they should be no more than 50% of the size of the primary residence. You can choose to have the ADUS attached or detached from your primary house. The general provision is that the ADU should not be more than 1200 square feet. Before commencing the project, we will share with you all the local regulations that apply to ADUs in Seattle.

Seattle Multi-Family ADUs

Since the introduction of the new ADU laws in Washington, homeowners are taking advantage of the opportunity to expand their living space. There are new multifamily units that can be added to your property. You can now add a new unit within your property by utilizing non-living spaces like basements, garages, and storage rooms. Garage conversions have become common in most Seattle homes. This has become a great way to get more living space and it goes a long way in increasing the value of your property.

If you are a homeowner and are contemplating getting an ADU, we are the right contractors for the work. Our skilled and licensed contractors will find a way to design and acquiring the permits to convert your garage. At the end of the day, you will have more living space without having to spend a fortune on work. Contact us and let us give you the best deal for ADU Seattle. You will get a functional living space within your budget.

Granny Flat Builders Seattle

Are you tired of having to put up your friends or relatives in a hotel room? A granny flat is a great way to host your loved ones without infringing on their privacy. Usually, these are living spaces, which are self-contained and can accommodate 2 people. The unit can be attached or attached from the main house. This is a concept that has been adopted by many as a way of living with their aging relatives and this is why it is known as the granny flat or granny pod.

Design and Plans for ADUS in Washington

When you need to put up an ADU, you should make a point of ensuring that you have a clear plan. Our contractors are skilled and we have architects who will work closely with you and ensure that your ADU is designed to fit the area available. Whether you want to build one from scratch or want to convert an existing space, we have several designs and styles that we can share with you.

Our engineers will not take anything to chance as we are committed to making sure that you are getting the best value for your money. You can trust us to give you tailored Seattle ADU plans and designs, which will be specific to your needs. Once we have completed the design and planning, we will embark on the actual construction process.

Contact Us

Emerald ADU Builders Seattle takes great pride in the fact that we have worked with so many homeowners and have helped them get more living space. If you are interested in ADUS, contact us today and we will make your dream come true. Talk to one of our skilled and qualified contractors for more information and to get a free quote.

Call (206) 222-2898 for immediate assistance.

How ADU Construction Process Works

  • 1. Send a request

    First things first - send a request to us to start the process. 

  • 2. Site Walk-through

    We will do a walk-through of your property to scope out the project and look for any issues. 

  • 3. Design & Planning

    Choose a building design and plan to the specifications of your property. 

  • 4. Permitting

    Permits in the city of Seattle are mandatory and we help you along with the process. 

  • 5. Build

    Once everything is approved we will start the building process.

  • 6. Completion

    After the build, we always do quality control and inspection for project completion.

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