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12 Years In Business

Company Details

Contact

1245 E Walnut St
Pasadena, CA 91106
http://design1.studio

Hours

  • Mon: 8:00 AM - 5:00 PM
  • Tue: 8:00 AM - 5:00 PM
  • Wed: 8:00 AM - 5:00 PM
  • Thu: 8:00 AM - 5:00 PM
  • Fri: 8:00 AM - 5:00 PM
  • Sat: Closed
  • Sun: Closed
View All Details & Credentials

Achievements

Service Details

  • Residential Work
  • Commercial Work

Areas of Expertise

  • Designer
  • Building Expert
  • ADUs
  • Multi-Family
  • New Builds
View All Offerings and Cities Served

Cost Information

  • Free Estimates
  • Credit Cards Accepted

Ratings

5.0
48 Verified Reviews
  • 5
    47
  • 4
    1
  • 3
    0
  • 2
    0
  • 1
    0

Highly rated for

  • Overall Rating
  • Value
  • Customer Service
  • Quality
Showing 11-20 of 48 results
5.0 Donna l. H. West Covina, CA
5/2/2026

We had a large backyard but a weird lot shape that two other designers told us would be too difficult for a two-story ADU. Design 1 Studio came out, took measurements, and showed us it was absolutely doable. They designed a beautiful 1,100 sq ft two-story unit with two bedrooms and two full baths. The city approved it and it?s now built and rented. I recommend them to anyone who?s been told their lot is too complicated.

5.0 Donna l. H. West Covina, CA
4/28/2026

We had a large backyard but a weird lot shape that two other designers told us would be too difficult for a two-story ADU. Design 1 Studio came out, took measurements, and showed us it was absolutely doable. They designed a beautiful 1,100 sq ft two-story unit with two bedrooms and two full baths. The city approved it and it?s now built and rented. I recommend them to anyone who?s been told their lot is too complicated.

5.0 Carolyn L. Glendale, CA
4/28/2026

I opened a new salon in Glendale and hired Design 1 Studio for the tenant improvement plans. They designed the space layout including all the plumbing for the wash stations, the electrical for each styling station, ventilation, ADA compliance ? everything. The health department and building department both approved the plans on the first submittal. My contractor said the plans were clear and easy to build from. I opened on schedule and the space is exactly what I envisioned.

5.0 Morris T. El Monte, CA
4/24/2026

Excelente experiencia con Design 1 Studio. Nos diseñaron una ADU de dos recámaras en nuestro patio trasero. Todo el equipo fue muy profesional y siempre estuvieron disponibles para contestar nuestras preguntas en español. Los planos se aprobaron sin correcciones y la construcción ya empezó. El diseño es moderno y funcional. Los recomendamos completamente.

5.0 Angelina P. Monrovia, CA
4/13/2026

Design 1 Studio did the plans for a full kitchen and bathroom remodel in our 1960s ranch home. The designs were thoughtful and made good use of the existing space without requiring us to move walls. Plan check went smoothly. I?m giving an A instead of an A+ only because the timeline for the construction documents ran about two weeks past the original estimate. They communicated the delay and explained it was due to the structural coordination. Final product was excellent and I would use them again.

5.0 Steven L. Los Angeles, CA
4/13/2026

We hired Design 1 Studio to design our new home from the ground up. About 3,600 sq ft, modern Mediterranean style, five bedrooms. The design process took roughly four months and they were collaborative the entire time. We went through three rounds of revisions on the floor plan and they never rushed us or made us feel like we were being difficult. The 3D renderings they provided were incredibly helpful for visualizing the finished home. Construction documents were detailed and well organized. Our GC said the plans were some of the best he?s worked from.

5.0 Jack J. Pasadena, CA
4/10/2026

Hired Design 1 Studio to design a detached ADU in our backyard. They came out for a free consultation the same week I called. The designer evaluated our lot, explained the setback and height requirements for our specific zone, and had preliminary concepts to us within two weeks. The construction documents were thorough and the city approved the plans with zero corrections. Our contractor was genuinely surprised. From start to permit approval took about three months. Very professional, very responsive, fair price.

5.0 Mike J. Pasadena, CA
3/31/2026

Used them for a bathroom and kitchen remodel in Covina. I originally thought I could just get plans from one of those online template sites but my contractor told me to hire a real designer. So glad I listened. The permit process was smooth and the designs actually made sense for my specific space.

5.0 Marvin L.
3/30/2026

Quick turnaround, fair pricing, and excellent communication. They designed a multi-family project for us (4 units) in Pomona and the city approved the plans on the first submittal. That alone saved us months. Highly recommend for anyone doing multi-family in LA County.

5.0 Sandri B. Pasadena, CA
3/30/2026

We are retired and wanted to build an ADU for our daughter’s family in our backyard. Design1 Studio was so patient with us through the whole process. We’re not tech-savvy but they printed everything out for us and explained every detail in person. The ADU is finished now and our grandkids love it. Thank you!

Photos

Design 1 Studio
20
ADUs
10
Homes and Buildings
4
Different Projects

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