A detached ADU is a separate building at the rear of the property with its own entrance and no shared wall. It rents highest, appraises strongest, and gives both households real privacy. The question in Mountain View is rarely whether you want one. It is whether the parcel can take it.
On the deeper lots here the answer is yes. On the narrow ones it frequently is not, and we would rather establish that in the first hour than after you have paid for drawings.
That last one is specific to tight urban lots and is routinely ignored until it becomes a problem. If a mini excavator cannot reach the rear yard, the foundation work changes and so does the price. We check it on the first visit.
California ADU law guarantees a minimum size that cities must permit for detached units, along with protected setback standards and limits on parking requirements. Review is ministerial, so a compliant application is approved without a discretionary hearing.
This matters most on constrained lots, because it means a small parcel is not automatically disqualified by local rules that would otherwise have blocked it. Mountain View reviews and inspects through its own city departments, and we manage that process end to end.
Mountain View operates a rent stabilization ordinance, which is not the case in most neighboring cities. Whether and how it applies to a newly built accessory dwelling unit is a question for the city and your own advisor, and it is worth answering before construction rather than after your first tenant.
We are contractors, not legal advisors, and we would rather point you to the right question than offer a confident answer we are not qualified to give.
A detached unit needs its own foundation, its own drainage strategy, and a proper thermal envelope. Skimping shows up later as a unit that runs cold, sounds hollow in the rain, and costs too much to heat. Given what land is worth here, building a cheap structure on expensive ground is a poor trade.
We build these to house standards from the soil up. Our ADU construction page describes the approach, and our project portfolio shows the finish level across our work.
A second independent dwelling changes what a property produces in a way that a remodel does not. In a city with land values and rental demand like Mountain View's, that shift is significant. Our piece on the value of an ADU works through how homeowners tend to think about it.
The fastest way to know is to have someone measure the yard, the access, and the setbacks together. Reach out to our team and we will tell you honestly what your Mountain View lot supports.
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