Cost Estimation for ADU Projects
How much will my ADU in Santa Clara County cost?
The cost to build an ADU in Santa Clara County varies significantly. A garage conversion is typically the least expensive option, while custom stand-alone ADUs or ADUs built above a garage tend to be more costly. Below is a breakdown of common costs.
ADU Cost Breakdown for Santa Clara County
Soft Costs
- Planning and Building Department Fees: $10,000-20,000, depending on the size of the ADU and whether it is a conversion or a new construction.
- Water, Sewer, and Fire Sprinkler Connections: $10,000-20,000, contingent on whether the existing services can be shared or if new services need to be tapped at the street.
- PG&E Electric Hookup/Panel Upgrade: $5,000-8,000, depending on whether you have a 200 amp panel at the main house, if a new service is required, and the distance the gas line needs to run from the shared meter (or opt for all-electric and add solar!).
- Architectural Plans and Engineering: $15,000-35,000 for architectural plans, structural engineering, Title 24 energy modeling, and possibly a soils report. Garage conversions may require less in terms of engineering and soils reports, whereas stand-alone ADUs require more extensive structural engineering and may need a soils report.
Building Costs
- Garage Conversions: $150,000-300,000, depending on the condition and size of the existing garage, proximity to utilities, and the extent of necessary upgrades.
- Stand-Alone or Attached ADUs: $300,000-700,000, depending on size, site, accessibility, finishes, and building department requirements. Smaller ADUs typically cost around $650-700 per square foot, while larger ADUs over 800 square feet may see reduced costs due to economies of scale, especially with simpler designs and finishes.
How Long Will It Take to Design, Permit, and Build?
At OCA ADU Builders of Los Gatos, your premier Santa Clara County ADU builder, we are committed to guiding you through the entire ADU construction process, ensuring a smooth and efficient journey from concept to completion.
Typically takes about 4-6 months, depending on the complexity of the project.
Usually requires another 3-5 months.
Generally, takes 6-7 months for garage conversions, 7-8 months for smaller stand-alone ADUs, and around a year for large ADUs. The timeline may vary depending on the project's complexity and the season (e.g., rainy weather can cause delays).
Ready to start your ADU build?
Better yet, give us a call!
At OCA ADU Builders of Los Gatos, we’re here to make your ADU vision a reality. With our experienced team, commitment to quality, and dedication to customer satisfaction, we ensure a smooth and successful construction process from start to finish. Whether you’re looking to add extra living space, generate rental income, or increase the value of your property, we have the expertise to guide you every step of the way. Contact us today to learn more and get started on your ADU project in Los Gatos!
OCA ADU Builders of Los Gatos
720 University Avenue, Los Gatos, California 95032, United States
Hours
Mon | 09:00 am – 05:00 pm | |
Tue | 09:00 am – 05:00 pm | |
Wed | 09:00 am – 05:00 pm | |
Thu | 09:00 am – 05:00 pm | |
Fri | 09:00 am – 05:00 pm | |
Sat | Closed | |
Sun | Closed |
Subscribe
Copyright ©2024 OCA Builders | All Rights Reserved
This website uses cookies.
We use cookies to analyze website traffic and optimize your website experience. By accepting our use of cookies, your data will be aggregated with all other user data.