Remember the indelible “cool mom” character played by Amy Poehler in Mean Girls? She wore Juicy Couture sweat suits and allowed underage drinking at home. Designer Juniper Tedhams’s mother, Charlotte Herzele, is a different kind of cool mom. She’s got belly dancing and poetry on her résumé, an Andy Warhol Elvis with an intriguing Factory-era pedigree, and a seriously chic home in Austin, designed by her talented daughter. Now that’s cool.

“Juniper has the best taste of anyone I know. She’s the only person I ever let dress me. I trust her completely,” Herzele says of the soup-to-nuts renovation of her Austin home, a formerly nondescript spec house located on a generous corner lot in a vibrant neighborhood of University of Texas students, professors (Herzele herself is an assistant professor in the Department of Nutritional Sciences), and assorted hippies. “The layout of the house was really strange. I could never figure out where I was supposed to be,” she continues.

Tedhams puts a finer point on the subject. “The house was awful—a weird catalogue home in a neighborhood of charming bungalows and Victorians. It reeked of Febreze,” the designer recalls. “My mom always had fun, eclectic taste, but interior design never really interested her. When this project started, her partner had recently passed away, and it was an important moment. I wanted to create a real place of respite, a place where she could be comfortable and entertain easily, which she loves to do. Basically, I wanted her to be happy.”

An unsigned Andy Warhol Elvis from the collection of Joe D’Allesandro commands the living room.

As so often happens, what began as a simple cosmetic makeover—picking new paint colors, some light alterations—quickly snowballed into a full-scale gut renovation. “I think there was one original wall left when we were through. We basically built a new house on the existing footprint,” Tedhams explains.

Working with architect John Maier of the Oregon-based firm Maier + Zelter, Tedhams recast the layout, the spatial flow, and ultimately the character of the house “to make it feel less hulking and flat,” the designer says. She and Maier reorganized the second-story bedrooms for visiting children and grandchildren around a central core, following a conceit that the guest quarters had formerly been outdoor porches that were closed off. They also added a gracious screened porch to the back of the house, as well as a new pool cabana with a guest apartment above.

For clarity and coherence, Tedhams limited the materials palette—plaster walls and walnut floors, furnishings, and architectural details predominate—while relying on an array of vintage and contemporary textiles and artworks for color and interest. Setting the tone for the experience, the entryway features a suite of Salvador Dalí watercolors from the artist’s illustrations for The Divine Comedy installed above a bespoke walnut bench with a heart motif (herzele is a German diminutive meaning “little heart”) set on a polychromatic 1940s Berber carpet. The bench, like almost all the custom furnishings and cabinetry throughout the house, was fabricated by Erik Gustafson, a longtime friend and collaborator of Tedhams’s.

In keeping with Tedhams’s reliance on a limited palette, the kitchen cabinets are painted the same color as the exterior of the house. Countertops are Belgian bluestone. Range by Wolf; dishwasher by Fisher & Paykel.

Moroccan cement tiles line the floor of the screened porch. Steel tables by Blend Interiors.

In the living room, sofas upholstered in Schiaparelli pink linen add an electric jolt to an otherwise restrained composition that includes a Jean Royere floor lamp and a graphic 1940s Tuareg rug of woven leather and straw. Commanding the room is an unsigned Warhol Elvis, printed at the Factory and given as a gift to Warhol superstar Joe D’Allesandro. Herzele acquired the piece from D’Allesandro’s wife Kim, a friend from Austin’s bohemian music scene. Cool, indeed.