Budget Breakdown: It Took Twice as Long, But This $266K ADU Built a Close Friendship

Architect Melissa Shin works alongside her client to create a tiny backyard house in Silicon Valley with vivid green tile and a bright pink door.

Budget Breakdown: It Took Twice as Long, But This $266K ADU Built a Close Friendship

Architect Melissa Shin works alongside her client to create a tiny backyard house in Silicon Valley with vivid green tile and a bright pink door.

The open-plan kitchen, dining area, and living space are arranged in a 16-square-foot volume that features a vaulted ceiling, lending a sense of spaciousness.

When BK Lin asked architect Melissa Shin to design an ADU for her home in Mountain View, California, she had no idea a worldwide pandemic was on the horizon. The project, which they initially expected to take a year or two, took four instead.

The upside? The client and architect became close friends over those four years, which enhanced Shin’s vision for the design. With two square 16-by-16-foot volumes (one public and one private), plenty of sunlight, and brilliant pops of pink and green, the resulting ADU lives larger than its approximately 500 square feet. 

A pink-painted front door and fascia enliven a 500-square-foot backyard ADU in Mountain View, California, designed by Shin Shin Architecture.

A pink-painted front door and fascia enliven this backyard ADU in Mountain View, California, designed by Melissa Shin of Shin Shin Architecture. To help control cost, the architect kept the exterior simple, employing white stucco walls for $11,400 and an asphalt-shingle roof (with gutters and site drainage) for $7,000.

Photo by Eric Staudenmaier

BK first considered adding an ADU to her property in 2016. The large lot has a duplex—the tech-industry executive lives in one unit and rents out the other—with a sizable yard behind it. "I’d been reading a lot about ADUs and had this big empty yard," she says. "I thought it would be a great to add more long-term income to the property, but in a way that wouldn’t require me to disturb or change the front units."

For the sake of affordability and durability, the architect employed vinyl flooring for $5,980 throughout the ADU. In the open-plan kitchen/dining/living area, a vaulted ceiling lends a feeling of luxury and spaciousness.

For the sake of affordability and durability, the architect employed vinyl flooring for $5,980 throughout the ADU. In the open-plan kitchen/dining/living area, a vaulted ceiling lends a feeling of luxury and spaciousness.

Photo by Eric Staudenmaier

BK immediately thought of Shin for the project, as the architect’s former firm designed a few projects for BK’s company in 2015. "We always kept in touch," says BK. "Years later when Melissa told me she was starting her own office and would mostly be working on ADUs, I thought my ADU would be a great collaboration!"

$9,400
Site Prep
$32,000
Foundation
$55,500
Framing
$7,000
Roof, Gutters, & Site Drainage
$6,350
Doors & Windows
$15,250
HVAC System
$11,400
Stucco & Fire Protection
$10,000
Exterior Plumbing & Trench
$12,000
Interior Plumbing
$18,000
Electrical
$4,500
Insulation
$10,500
Drywall
$15,770
Millwork
$900
Hardware
$4,720
Counters (Labor & Materials)
$1,750
Trim
$1,800
Baseboard
$7,500
Paint (Interior & Exterior)
$15,150
Tile (Labor & Materials)
$6,450
Plumbing Fixtures
$1,700
Lighting Fixtures
$1,900
Water Heater & Vent
$2,200
Shower Door
$5,980
Flooring (Labor & Materials)
$1,500
Low Voltage
$7,000
Solar

Grand Total: $266,220

When they began planning the design in 2018, BK knew she wanted a separate bedroom and a full kitchen and bathroom. "I didn’t want something with mini-size appliances," she says. "I wanted it to look and feel like a house."

The kitchen is adorned with Fireclay olive-green tile on the backsplash that ties to the green-painted custom millwork of the lower cabinetry.

Shin splurged when it came to the kitchen design, selecting olive-green Fireclay tile for the backsplash and custom millwork for the cabinetry. She painted the lower cabinetry a cool green tone that ties to the tile of the backsplash and finished it with a thick lacquer coating to help prevent wear and tear. 

Photo by Eric Staudenmaier

See the full story on Dwell.com: Budget Breakdown: It Took Twice as Long, But This $266K ADU Built a Close Friendship
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