ADU/Pool house/Tiny Home valuation

[Olivier S.]

Hi there,

I am trying to assess what would be the added value brought by adding an ADU to my property.

Right now I am getting quotes between $300-375/sqft to build a roughly 450 sqft 1bed/1bath pool-house on my property in 78759.

The home itself appraises for around $500/sqft based on recent sales comps. 

I have asked one realtor who told me that based on current market, I should theoretically be able to value those extra 450 sqft at full price (ie. $500/sqft). 

I also found one recently sold listing near by who was adding the sqftage of the ADU in to the total property sqft and bed/bath count.

Any experience realtor / appraiser / investor in this forum who would be able to confirm this ?

Thanks for your help