How To pull comps for a small multifamily

[Jacob D Adamczak]

I am looking to house hack a duplex or triplex and was sent a property to evaluate to see if I was interested.  It is a duplex in a neighborhood of primarily single family homes.  For this reason, it had more bedrooms and was priced much higher than the homes in that immediate neighborhood. I was curious as to the best way of pulling comps using a site like realtor.com or Zillow.  Also, if I cant find many duplexes in the area, how can I account for this, should I use duplexes in a farther out area or look for a similar size house with similar numbers of beds and baths? Thanks for the help!