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How Much Does an ADU Increase Property Taxes in California? (2026 Guide for Bay Area Homeowners)
Short answer: Yes, building an ADU raises your property tax bill, but only by the assessed value of the new unit. Your existing home keeps its Proposition 13 base value and is not reassessed. In the Bay Area, the increase is typically $1,500 to $3,000 per year, depending on the ADU's size and assessed value. Key Takeaways No full reassessment: Only the "new construction" portion (the ADU) is assessed at current market value. Your primary residence stays protected under Propos
Jessy Chen
Mar 314 min read


Bay Area Cities Now Allow Front Yard ADUs and Over-the-Counter (OTC) Approvals For Faster Turnaround
If you're a Bay Area homeowner, there's never been a better time to build an ADU. Cities across the Bay Area are starting to allow front yard ADUs; some cities include Saratoga, Cupertino, Santa Clara, Milpitas, and San Jose (conditional). The newest city approved for front yard ADU is Sunnyvale. A Bay Area front yard ADU allows completey separated space that ensures maximum privacy and zero disruption in backyard space. Thanks to California state law and the city's recent u
Chen Zhou
Jun 16, 20253 min read


Building an Aging-in-place ADU for Elderly Parents in Cupertino
The demand for adaptable living spaces is on the rise in the bustling neighborhood of Cupertino. This surge is driven by several factors, including the influx of tech professionals who require flexible housing solutions to accommodate their changing lifestyles. Additionally, the high cost of living compels many families to optimize their existing spaces rather than relocate. Young tech professionals like Tao, who juggled a hectic schedule in a double-income family, seek an a
Chen Zhou
Aug 4, 20244 min read
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