Like music, architecture demands balance. Even the most dense melodies are built on a single note, and space can be created just as richly around a magnificent woman - or two. Elizabeth "Betsy" Dudley and architect Robyn Salathe both are woven into the polished concrete, anodized aluminum, slump glass and velvety wood of Dudley's dream home on 16 acres of Eagle ranch land. It is an homage to contrast, the pastoral setting somehow embracing the modern structure, which, in turn, is a mix of austere and intimate, stylish and idiosyncratic, functional and filled with wonder.

The same could almost be said of Dudley. She is a single woman in her glory years, a retired teacher and cattle rancher ready to live her life exactly as she wishes. World travels are just as essential as weekends with her five grandchildren, and the house tells that story. Fifteen-foot walls under a bow-truss roof shelter a collection of art ranging from an old door hammered with Mexican folk charms to a picture stone from the Yangtze River to a pistachio shell masterpiece by her grandson.

No corner is without context, a quality that stems not only from Dudley's personality and belongings but also from Salathe's graceful way with geometry, texture and light.

"There's a reason and a rhyme behind everything," Salathe said of the design she and Dudley crafted.

It started with the past. After living for many years in a remodeled 1950s ranch house overlooking the Boise Foothills, Dudley was ready to embark on the journey of starting from scratch.

"We built this from completely bare ground. It had been a little ranch, about 56 acres that was totally covered with weeds," Dudley said. After selling all but 16 prime acres, she was ready to bring an architect onto the property and into the visioning process. Her architect son, Dit Dudley, helped her come up with some basics before Salathe was invited on a tour to see if there was potential for a partnership.

"She called me up and asked if I wanted to see the site. I think we both knew," Salathe said. "I get really nervous at that stage because I think, this could be anything. It's overwhelming at first. But as soon as you get into the design process, it starts being fun."

The fun lasted about two years as the project progressed from a quarter-inch scale model in the dirt to a 4,300-square-foot dwelling full of sweet country air and a lifetime of memories.

"A lot of inspiration came from the environment, the plants and the wildlife," Salathe said.

"I loved the fact that it was undeveloped but still near Eagle. I loved the view and all of the water," Dudley added. "I had looked at houses and didn't see anything I liked that was already built."

Together, she and Salathe worked from a wish list and an arsenal of one-of-a-kind objects from all over the planet.

"Our goal with the whole house was to make it really livable for friends, grandchildren and dogs," Dudley said. "There were two theories: Bring the outside in and make it easy to maintain."

Salathe responded by doing a complete site analysis to determine the best angles for views, wind, heat and light through all four seasons. The open yard is simple grass with splashes of color from lupine, daisy and iris blooms around a pond that is home to a few fish and uncountable bullfrogs.

The patio has a circular fire pit carved into a cement slab that makes a perch for marshmallow toasting or mixing summer drinks. The "garage door" behind it is all windows and connects to the airy living room. In an effort to make the transition as seamless as possible, Salathe allowed only a 4-inch difference between the slab height and the grade. And the circumference of the fire pit echoes radial control joints embedded in exterior and interior flooring, a visual and metaphorical ripple effect.

"There are a lot of alignments that create flow and proportion," Salathe said, admitting that her inner math nerd motivated her to use the golden ratio found in nature to layer the physical manifestation of Dudley's desire to bring the outside in.

"I love having people come over for the first time because it is so unexpected. Kids get it immediately - 'Oh, it's a playground,' " Dudley laughed. "People walk in and don't know what makes it so neat, but the symmetry and repeating patterns are what they love."

They also love spending time in each room dissecting its nuances. Just off the front door is a space without category. Part office, part meditation chamber, part bedroom, its 8-foot pocket door keeps it cool and private. Slabs of tamarind finished by Dudley create a surface for portraits of Nez Perce braves taken by famed Western photographer E.S. Curtis.

An old cobblers bench salvaged by Dudley's father is a makeshift coffee table, just one of many pieces serving unusual purposes in her home. A bass drum is a base for a sculpture; a weathered sugar mold is a display for votive candles; an old Thai fence post is an ethereal lamp.

"I can't stand to use things for the purpose they're supposed to be used for," Dudley said with a laugh.

This rebellious, fresh take on function is in line with Salathe's penchant for modern design.

"There is no traditional thought behind modern design as far as adornment, details and materials. You're free to put unlike things together and use materials that are unconventional," she said. Having first been trained in the formal, Federal style, which borrows from Georgian Neoclassical, Salathe realized she wanted to work on the opposite end of the spectrum. "I wanted to design; I didn't want to copy," she said.

With 40 feet of kitchen counter space, a kaleidoscope of fine woods, shoji screen doors and foreign coins from Dudley's travels inlaid in the entryway, the house is not based on anything either woman has seen before. The buttery background palette offsets special objects including a refinished childhood dresser, a toy barn by a Meridian craftsman and the entire Hardy Boys canon in original bindings. Shelves built into the wall outside Dudley's bedroom hold "Welcome to Pooh Corner," ornate volumes of Shakespeare and several Northwest histories written by her grandfather.

Her entire bathroom was designed around a decorative plate, an idea that might seem strange to someone who has never been asked, "What do you really want?"

"Betsy is so determined. She knows what she wants, and that's what was so joyful about working with her. There was no hemming and hawing," Salathe said. "You should be able to feel yourself in the materials and the space. It's a human-architecture relationship. It isn't just a dwelling; it's a story of a rich life."