How to maximize property value with ADU?

[John Anderson]

I am looking to build a two bedroom ADU in San Jose. The total square footage will be approximately 720 ft.² and it will be detached. The property is primarily for my in-laws, so I will not be receiving any rental income in the short term.

I am aware that the city typically does not value the ADU very highly, and that it is unlikely that I will be able to recoup the building costs on day one. However, I am curious as to whether there are any steps I can take to maximize the appraisal value so that I can maximize my ROI to the extent possible?

Many thanks in advance!