Add bath and finish basement?

[Michael Donatucci]

Purchased a 1200 SF 3 bed 1 bath home with unfinished basement in need of rehab that I plan to hold onto. There are a lot of 3 bed 2 bath comps in the area with same square footage that are trading for around 270K that have finished basements. Given I plan to rent, I don't think it makes sense to add a bath and finish the basement. How much is reasonable expectation for downward adjustment for value based on 1 less bed and non finished basement? 

[Allen Thomas]

@Matthew Paul, the additional rental income would definitely offset the taxes, and the equity could be used to purchase an additional property. The additional bath and finished basement would put the home in an entirely new price point.