A one-stop source about multigenerational homes, laneway houses, ADUs, granny flats, in-law units, accessory dwelling units…
“‘Granny’ was a resident of this property many years ago, who we know of through her family. Friendship with that family is how we came to enjoy what for 34 years we’ve called Granny’s Place.” -Carolyn Matthews
Bruce Nelson and Carolyn Matthews first learned about ADUs by participating in green building tours in Portland, Oregon. Carolyn and Bruce have lived on their property in the Cully neighborhood of Portland, Oregon since 1978. Since then they have created a garden oasis and developed strong relationships with their neighbors. So they liked the idea of aging-in-place on their own property.
As they began designing Granny’s Garden Cottage, Carolyn and Bruce were inspired by the small, accessible homes they discovered when they did research at the library or went on green building tours. Their architect Michael Wolfe also provided inspiration and considerable knowledge about green building and accessibility.
“At the time, the fact that our main house was small reduced the allowable size of the ADU unless we challenged the ruling.” -Bruce Nelson
Another factor influencing the size and shape of their little home was their desire to protect a nearby deciduous tree. They knew that if they wanted the magnificent Japanese pagoda tree to shade the courtyard between their primary dwelling and the ADU they would need to be careful about protecting its roots. In addition to these footprint limitations, Bruce and Carolyn were interested in universal design elements that would enable them to age-in-place. Their design includes a wide hallway, a roll-in shower, and a countertop with a top that raises and lowers to accommodate wheelchair users.
Sustainability was another driving factor for Bruce and Carolyn’s ADU. They knew that attention to energy efficiency would provide environmental and financial sustainability. So Granny’s Garden Cottage includes a variety of green building features, including advanced framing for the walls, structurally insulated panels for the roof, on-demand water heaters for domestic use and radiant floor heat, double pane windows with argon gas, a heat recovery system, local wood for the kitchen woodwork, salvaged wood for the bathroom cabinets, and option for rain water harvesting and treatment for use in the building, and low VOC paints and plasters.
“My favorite features are the color and the quietness of it. The building is comfortable to be in and glows with the feeling of warmth.” -Bruce Nelson
As they designed their home, Carolyn and Bruce anticipated that it could be used in a variety of ways. It could used as a short- or long-term rental, could serve as a space for projects, and eventually they could live in it. Bruce and Carolyn currently rent their ADU as a furnished rental and suspect they will continue with short-term rental for the foreseeable future.
“My favorite thing about having an ADU is that it gives us options.” -Bruce Nelson
“When our neighbors lived in the ADU for 2.5 years while renovating their home, we had frequent contact and meals. For short term occupants, the interaction is much less frequent.” -Bruce Nelson
“We’ve been surprised how many other people really love the building.” -Bruce Nelson
Bruce says that the ADU is bringing in sufficient income to cover short-term expenses and operating costs, but it is not contributing to help cover the cost of its construction. Their home was quite expensive per square foot because they were early adopters of several green building techniques. Of course, every pioneering home, no matter how well thought-out, has at least one thing the owners would do differently if they could do it over again. For Bruce, that would the rainwater system.
“The rainwater recovery system has been quite worrisome over time. If we could do it over we would have connected the rainwater system to the main house roof and likely brought in rain water consultants from out of town.” -Bruce Nelson
“No, not at all. We love our neighborhood, our garden and our home. Due to the larger size of lots in our neighborhood, I expect more infill to occur. Some of it will likely be accessory dwelling units. On our 5 block long street, with maybe 50 residences on it, I am aware of current properties with ADUs plus an additional 1 that will soon be in place.”
“Consider who you are targeting by your construction. Is it only able-bodied people who can handle steps? Is it just young folks with few worldly possessions? Is it frail elderly? Is it children?” -Bruce Nelson