Help homeowners estimate project budgets and get closer to building an ADU
The ADU Calculator is an easy-to-use online tool that gives homeowners the estimates they need to move forward while reducing questions about potential costs at the permit counter, including construction costs, fees, taxes, rents, loan payback periods, and return on investment. Estimates are based on local rules, fees, and real-world construction costs and rents to help homeowners understand how choices may affect their project budget and investment over time.
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California pricing
Costs include a one-time fee for onboarding/launch and an annual fee for ongoing maintenance/support.
Pricing is based on what you need and discussed during an inquiry meeting. Use the form above to start the conversation – we’d love to talk with you!
PriciNg for other states
If you’re interested in bringing the Calculator to a community outside of California, get in touch to start the conversation!
2026 Onboarding Fees
(One-time fee, includes 2026 license)
Note that an additional cost will be included if asked to submit an RFP response.
Population
One-Time Fee
- Under 50,000 $4,125
- 50,000-200,000 $6,000
- 200,000-500,000 $9,000
- 500,000-1 million $12,000
- 1 million+ $15,000
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Annual License
(Yearly fee, starting 2027)
Population
2027 Annual Fee
- Under 50,000 $3,000
- 50,000-200,000 $5,000
- 200,000-500,000 $7,500
- 500,000-1 million $9,000
- 1 million+ $12,000
What's Included
Prices applicable for California onboarding in 2026. Prices are subject to change. Group pricing is available for multi-jurisdiction projects and collaboratives. Maximum commitment with price guarantee is three years.
ADU Tools Inquiry Form
Ready to move forward?
It’s easy to get started! Fill out this form and our team will get back to you with next steps.
Communities Using The ADU Calculator
Meet your housing goals, support your community
ADU Accelerator tools promote ADU development with innovative resources and expert policy support
