The Danville ADU Budget Trap Most Homeowners Don't See Coming

Danville ADUs over 500 sf can trigger $3,102 school fees, sewer charges, fire review, and water-service costs. Check the stack before design.

A Danville homeowner approves the layout. The ADU fits the backyard. The square footage works. The project finally feels real. Then the hidden costs start showing up. The project crosses 500 square feet. School fees suddenly apply. If it is detached, Central San capacity fees enter the picture. San Ramon Valley Fire joins the review path. EBMUD may force a meter upgrade or a new water service. None of that feels obvious when the layout first gets approved. But in Danville, this is exactly how homeowners get surprised before construction starts. Why the Town permit isn't the full picture The…