Question 1

How long does a building permit take in San Jose?

Accepted Answer

It depends on scope. Simple electrical, plumbing, or mechanical replacements can go over the counter or clear in one to five business days online. A kitchen or bathroom remodel with structural work typically runs four to eight weeks of plan check, and a room addition or ADU generally eight to fourteen weeks. San José publishes a Customer Service Dashboard with current timelines, and we confirm those before committing to a schedule.

Question 2

What is San Jose's Express Plan Check?

Accepted Answer

It's a program where qualifying single-family remodels and additions are reviewed in a dedicated appointment rather than the standard queue, with plan review comments back in about two to three business days. Not every project qualifies, but when yours does it removes weeks of waiting. There is also a separate paid expedited review that can cut standard plan check time by roughly 30 to 50 percent.

Question 3

Do I have to live on the property to build an ADU in San Jose?

Accepted Answer

No. Owner-occupancy requirements are prohibited for both the main home and the accessory unit, so you can build an ADU and rent both. San José also cannot block the sale of an ADU developed as a condominium simply because it is an ADU. That combination is a large part of why ADUs are so popular here.

Question 4

How much rent can an ADU earn in San Jose?

Accepted Answer

In premium neighborhoods such as Willow Glen, Rose Garden, and Almaden, ADUs commonly rent in the range of $3,200 to $4,000 per month. Rents vary widely by neighborhood, size, and finish level, so treat those as a planning figure rather than a guarantee — but it explains why many owners here view an ADU as an investment.

Question 5

I have an Eichler — what should I know before remodeling?

Accepted Answer

Eichlers and similar mid-century homes have post-and-beam framing, radiant heating tubing cast into the concrete slab, and expansive single-pane glazing. The critical step is locating the radiant tubing before any slab is cut; puncturing it is the classic costly mistake. Glazing and roof work also need to respect the original framing. These are very doable projects with a contractor who knows the type.

Question 6

Did the building code change for 2026?

Accepted Answer

Yes. California's 2025 Building Standards Code took effect January 1, 2026, and San José plan-checks against it. It affects energy requirements, electrical provisions, and what existing conditions must be brought up to current standards when you permit. If your plans were drawn under the previous cycle, confirm they are current before submitting.

Question 7

Is it worth remodeling an older San Jose home instead of moving?

Accepted Answer

Usually, yes. The median San José home dates to the early 1970s — structurally sound but dated in kitchens, baths, and systems. Given local home values, a well-executed remodel typically costs far less than trading up, and it lets you keep your neighborhood and schools. Adding an ADU can also generate rental income the way moving never will.