We have the experience, personnel, and resources to make your ADU project run smooth. We can ensure your job is done right and on time.

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ADU Portland

Tiny houses aren’t the only homes rising in Portland. Accessory Dwelling Units (ADUs) are rather popular and almost everybody can support, especially as our culture shifts from single-generational houses back to multigenerational homes. You may acknowledge ADUs by their more basic names, like mother-in-law houses, prefab guest house with bathroom, backyard studios, granny-flats, ADU houses, studio apartments or guesthouse, or tiny home. Each city has their own zoning laws and allows for building a Portland ADU unit.

If you do not currently understand, Stanlees Home Improvements is a high quality, full service, earth friendly ADU builder in Portland, OR while likewise specializing in energy effective new home and Portland ADU redesign construction. We are a household owned & operated local company with impeccable recommendations, and a triple A credit ranking. We are members of the BBB with high rankings, and are a Certified Lead Safe business. We constantly offer totally free quotes and on-time, on-budget.

Portland ADU Contractor Services

ADU Pre Construction

We Are A Full Service ADU Contractor. Determine whats needed before you start your ADU project.

ADU Construction Management

As a full service ADU Builder, it's important to understand the construction activities when building an ADU unit.

After Construction

Find out what to expect with all post construction activities for building an ADU home

The People

Highly Trained Staff To Install Your ADU Unit Right The First Time. You can trust us and our long list of satisfied customers to handle your next project professionally

We Provide

We maintain a long list of satisfied customers who took the time to review our past performance. Be sure to check our testimonials and see what others are saying.

Our Experience

With a complete line of residential ADU Building or ADU Remodel options, Stanlees Home Improvements has the experience and know-how to fix nearly any roofing issue you may have.

Economical and Trustworthy ADU Contractors in Portland, Oregon

Why Build An ADU?

As the many names indicate, ADU Portland areas are personal and different from the main section of the house. They’re also not limited to member of the family. Besides being a guesthouse or living space for family or a nanny, you can use it as an individual area if required. For instance, as a as a personal artist or writing studio, a movie or entertainment space for hosting football watching parties, or an office.

Depending on the kind of ADU, they can have little noticeable effect on the outside of the existing principal house, and small to no effect on building footprint. However, there are lots of obstacles associated with the design of such systems, such as including a different entrance, developing egress in a basement or top floor, handicap available bathroom, and conference proper square video footage and overlay zoning requirements. Aside from physical modifications, ADUs may raise density and change the social character of the neighborhood.

Remember the majority of municipalities do not enable citizens to lease ADUs. Laws change each year, so you should consult your city first. A “backyard home” sounds so non-threatening, who could possible oppose it?

ADU Contractor

Portland ADU Contractors

Guidelines For Adding a Portland ADU or Guesthouse:

You can have your guesthouse connected or separated to the primary residence depending upon the size of your home or business lot. Portland may require guesthouses to be of the very same architectural design and structure materials of the primary home. You and your next-door neighbors don’t wish to see a clashing style on a daily basis.

If you reside in a neighborhood with a property owners association, contact them too. Your HOA might not permit a ADU or guesthouse.

ADU Contractors Portland Oregon

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Portland ADU Builder

Here are some typical coding requirements for building an ADU in Portland:

  • Avalibility

    Only one guest house per lot.

  • Parking

    You should offer one parking space for the ADU without taking away from parking for the main dwelling. You can not have 2 areas for the ADU.

  • Deminsion Guidelines

    The guesthouse can be 900 square feet at max and can not surpass HALF of the gross flooring location of the primary home.

  • The Garage

    A garage connected to the guest house is counted toward the the allowable square footage of the guesthouse. Follow the above link for extra rules if you have a very large home and lot to begin with.

  • ADU Height

    The height of the guesthouse can not surpass the height of the main house.

  • Address Guidelines

    It can not have a separate address from the primary home.

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ADU Portland Contractors

Hire A ADU Portland Contractor?

Every contractor has their specialty, so make certain to discover one with experience in house additions and remodels. Stanlees Home Improvements has constructed numerous ADU houses. We have positive local contractor reviews on Google, Yelp, Angie’s List, and or Facebook. Never sign an agreement without very first reviewing a made a list of bid for the project, which should break out expenses into labor and products. We always consist of a start and end date and reasonable market estimate. Our Portland general contractors will constantly interact with you and let you understand the number of individuals will be dealing with the home project and will be on your home or business, consisting of if any of the work will be farmed out.

Residential ADU Portland Contractor

Attached or detached? Conversion or new structure?

One element that will affect price is whether it’s an attached (a basement unit or addition) or separated (” DADU”) structure. Building a separated ADU is a lot like building a brand-new house, total with structure, 4 exterior walls, and roof, so they can be more costly than building an attached ADU.


Do not let their small size fool you; even little structures need design work from a designer, especially provided the style puzzles that restricted area can provide. Figure in 8-15% of construction cost for your ADU design, depending on level of style services needed and your option of designer.

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adu builder portland oregon

ADU Builder Portland

Building Expenses

Construction expenses vary a fair bit depending on the specifics of a task. We’re often asked, “Exactly what does an ADU cost to build per square foot?” However when constructing a Portland tiny house, we are basically squeezing all the aspects of a bigger house onto a smaller sized footprint, so per square foot expense falls short as a beneficial step. Rather, general cost is more handy. Typically speaking, the ADUs we build (especially the stand-alone variety) start at at sixty thousand dollars in building and construction cost, with that cost increasing depending upon style choices about finishes, components, and building parts.

ADU Portland remodels can be costly. Contact us initially to see if now is the correct time to re-finance your home mortgage and if a remodel or if an ADU is the very best option. Doing so may supply you with money for house jobs.

If you are seeking to invest in a new home with Portland guesthouse, we can combine you with one of our vetted Portland general contractors. Our local Portland general contractor will help you choose if and ADU is the best choice for you. We are here to help!

Portland ADU Contractors Service Areas

BEAVERTON, CLACKAMAS, GLADSTONE , GRESHAM, HAPPY VALLEY, HILLSBORO, LAKE OSWEGO, OREGON CITY, PORTLAND, TIGARD, TROUTDALE, TUALATIN, WEST LINN, WILSONVILLE, VANCOUVER, CAMAS, 97223, 97008, 97224, 97035, 97281, 97078, 97219, 97076, 97075, 97077, 97298, 97062, 97034, 97005, 97225, 97221, 97007, 97239, 97258, 97036, 97268, 97269, 97201, 97140, 97291, 97003, 97205, 97202, 97222, 97006, 97204, 97267, 97251, 97238, 97228, 97208, 97280, 97296, 97294, 97283, 97286, 97256, 97254, 97253, 97282, 97290, 97292, 97293, 97242, 97207, 97240, 97068, 97209, 97214, 97070, 97210, 97229, 97227, 97206, 97027, 97232, 97212, 97215, 97123, 97266, 97213, 97217, 97086, 97216, 97211, 97015, 97203, 97132, 97218, 97220, 97002, 97236

Additional Information For Portland, OR

Portland (/ˈpɔːrtlənd/) is a port and the largest city in the U.S. state of Oregon and the seat of Multnomah County. It is in the Willamette Valley region of the Pacific Northwest, at the confluence of the Willamette and Columbia Rivers. The city covers 145 square miles (380 square kilometers) and had an estimated population of 632,309 in 2015,[7][9] making it the 26th most populous city in the United States. Approximately 2,389,228 people live in the Portland metropolitan statistical area (MSA), the 23rd most populous MSA in the United States. Its Combined Statistical Area (CSA) ranks 17th with a population of 3,022,178. Roughly 60% of Oregon’s population resides within the Portland metropolitan area.[10]

Named after Portland, Maine, the Oregon settlement began to be populated in the 1830s near the end of the Oregon Trail. Its water access provided convenient transportation of goods, and the timber industry was a major force in the city’s early economy. At the turn of the 20th century, the city had a reputation as one of the most dangerous port cities in the world, a hub for organized crime and racketeering.

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