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ADU Builders
Bay Area
Add space, boost value, and live better – explore our seamless ADU & addition services today!
Discover Our Top-Selling ADUs
Boost your property value, generate rental income, or simply enjoy more living space – our popular ADU designs offer endless possibilities for every need.
1
Bedroom ADUs
Starting at $225,000
2
Starting at $495,000
Bedroom ADUs
Bedroom ADUs
3
Starting at $330,000
We make it easy
ADU / Additions
Craving more space? We unlock your home's hidden potential! Skip the cramped feeling and transform your home with our seamless ADU & addition services. Imagine: a dedicated guest room, a home office, or even a rental income boost – all within reach. We handle the entire journey, from expert design to meticulous construction, ensuring a stress-free experience.
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
The San Jose ADU Project
ADU / Addition FAQS
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An ADU, or Accessory Dwelling Unit, is a self-contained living space with its own kitchen and bathroom. It can be an independent structure or part of an existing property. Unlike a traditional addition, an ADU is a separate living space that offers flexibility for various uses.
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ADUs serve various purposes, including providing space for guests, accommodating aging parents, creating rental income, or establishing a home office. They offer a versatile solution to meet the changing needs of homeowners.
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The process varies by location, but generally involves obtaining necessary permits from local authorities. One-Up Builders will guide you through the permitting process, ensuring compliance with all regulations and codes.
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The timeline depends on the scope and complexity of the project. On average, an ADU or addition may take a few months to complete. One-Up Builders will provide a detailed timeline during the consultation based on your specific project.
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The cost varies based on factors like size, design, materials, and local labor rates. One-Up Builders offers transparent pricing and will provide a detailed estimate after assessing your specific project requirements.
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While not always necessary, hiring an architect can enhance the design and functionality of your project. One-Up Builders works with skilled professionals to ensure your vision is translated into a well-designed and functional living space.

Customer Testimonials
CONTACT US NOW
And Speak with our experts
Our Team is Ready to Assist You!
Call us:
(408) 634-3891
Email:
oneupbuilders.co@gmail.com
Location:
226 Phelan Ave, San Jose, 95112