Buying SFH with ADU, then rehab, will increase ARV?

[Ben Lee]

Hi BP Team! I've learned so much through this forum and really want to get my real estate journey started. I am considering a property listed at $800,000, which includes a 2-bedroom, 2-bathroom main house (1100 sq/ft) and a separate ADU of the same size. The ADU has separate meters and a separate address but is being listed as one property. The property requires significant rehab and I am considering to put in a lower bid than the asking price. The comps in the area, which are 3-bedroom 2-bathroom or 2-bedroom 2-bathroom homes (1100-1500 sq/ft) with no ADU, are valued around $800,000. I am curious about the ARV once the renovations are completed. Could you provide insight into whether the presence of the ADU will help boost the ARV beyond the comps that I am seeing? Thank you in advance!