Vendor Directory
Find your professional team
Our mission is to help homeowners in Napa and Sonoma Counties build accessory dwelling units (ADUs) by providing homeowners with education, resources, and information.
One of the most common requests we get is for assistance with identifying the professional team that will help folks on their ADU project. To assist homeowners with this, on an ongoing basis we add vendors to the list below that can help you with a number of aspects of your ADU project.
The Napa Sonoma ADU Center’s role is limited to serving as an objective nonprofit resource for homeowners.
We want to help you ask the right questions to inform your decisions regarding the selection of a professional ADU team. Any contract for services on a homeowner’s ADU project is between each homeowner and your chosen professional team. Once you engage professionals, the Napa Sonoma ADU Center is available to help answer your questions on an as-needed basis along the way.
The list of industry professionals below is for informational purposes only. Napa Sonoma ADU cannot take responsibility for the services or conduct of any vendor.
You should make certain to conduct your own due diligence before engaging any professional for services on your ADU project, including requesting bids from an average of three professionals within the relevant vendor category before selecting the professional(s) that are the best fit for you and your ADU project. For more resources to guide your selection process, scroll to the bottom of this page. You can learn more about the overall ADU Process in our ADU Workbook.
If you have a poor experience with one of the vendors listed below, please reach out and let us know at: info@napasonomaadu.org.
Finance Professionals
Elisabeth Giron
Searchlight Lending
Oficial de préstamos hipotecarios
Laura Blair
BuildZig Funds Control
Construction Escrow Account Provider
- 800-380-0180
Lindsay Moon
Searchlight Lending
Licensed broker and builder
- 415-819-3794
Provides both traditional and non-traditional financing, e.g. for undocumented, unemployed, self-employed, & other individuals.
RenoFi
Second mortgage Home Equity loans based on the AFTER-construction value of your ADU.
- Loan amounts up to $499,999
- CalHFA $40,000 ADU grant available
Sean Charter
Redwood Credit Union
Assistance Manager – Construction Lending
- 800-609-9009
Our partner on an innovative ADU construction loan product that opens up financing for homeowners who may not be able to qualify for traditional financing. Learn more here & reach out to RCU for a 1:1 consult!
Architects + Designers
For more resources, please check out our ADU Workbook, including information on how to select a design professional and a useful Initial Design Exercise activity.
Permit Assistance
Keystone Construction Group, Inc.
Preconstruction/Permitting Services
- (707) 365 – 8367
General Contractors + Builders
For more guidance on how to choose a general contractor, please visit our Construction page and our ADU Workbook.
Prefab Builders
See more about traditional vs. prefab construction on our ADU 101 page, our Getting Started page, and our ADU Workbook.
Geotechnical Engineers
Engineers
More Professionals
The professionals on this list work in both Napa and Sonoma counties and perform site evaluations and design alternative sewer disposal systems. They may offer various other services including geotechnical analysis, septic analysis, surveying, civil engineering, etc.
The professionals on this list are qualified septic consultants.
Title 24 / CalGreen Energy Consultants
A Title 24/CalGreen Energy consultant is a specialist who analyzes architectural plans to ensure they comply with Title 24, the code section that deals with energy efficiency, and CalGreen, the “green building code.”
Typically the designer/architect will handle the relationship with the Title 24/CalGreen consultant. There may be 1 or 2 rounds of finessing the design to make it comply before it can be submitted to the jurisdiction for approval. Check out our ADU Workbook for more information on Title 24.
Some jurisdictions require that homeowners select a consultant from their list of approved vendors, including the City of Santa Rosa, Sonoma County, and City of Sonoma. Those lists of consultants, who can also work in other jurisdictions, are included here:
City of Santa Rosa Approved CALGreen Inspector List (last updated September 2020)
County of Sonoma | Permit Sonoma CALGreen Special Inspection Agency Recognition List (last updated November 2020)
City of Sonoma Authorized Special Inspection Companies (Category #11) (last updated October 2020)
Additional Resources for Hiring Vendors
CA Department of Consumer Affairs California Architects Board Consumer’s Guide to Hiring an Architect
CA Department of Consumer Affairs Consumer’s Guide to Hiring a Landscape Architect
CA Department of Consumer Affairs Contractors State License Board: Information on the status of a contractor’s license and tips on hiring a builder
CA Department of Consumer Affairs Consumer Guide to Engineering and Land Surveying (including hiring an engineer or land surveyor)
CA Public Utilities Commission (CPUC) California Solar Consumer Protection Guide
