Journal · Cost guides
Read before
you call.
Practical starting points for planning an addition, understanding the permit process and comparing an ADU with more space in your home.
01 · 7 min
What an addition costs in San Jose, 2026
Not a number: the six things that move the number, how much each one moves it, and the questions to ask before you sign.
Read02 · 5 minPermits: the real timeline in Santa Clara County
Over the counter, plan check, and the two comments everyone gets. Week by week, for San Jose and the towns around it.
Read03 · 6 minADU or addition? The 500 sq ft question
Same square footage, different rules, different house. How to decide, with the numbers that matter in San Jose.
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