Their data gets more local every year, and here is a cut and paste with Atlanta's bathroom stats:
2010 job cost resale value costs recoup type of job 2011 comparisons
$36,496 $20,115 55.1% Bathroom Addition $40,710 $21,695 53.3%
$15,252 $9,950 65.2% Bathroom Remodel $16,634 $10,668 64.1%
And your contractor may be speaking very specificallay about smaller houses in Medlock Park or something, but the 2011 ATL average cost for a second story addition is over twice what he suggests.
Good luck - you might wanna talk to a few other contractors; I'm happy to suggest a few of the good players in Decatur.
The typical remodel cost between $5k-$30k with an addition, again, keeping in mind the many different factors, betweetn $10k-$50k on a midscale level.
I've remodeled homes (note we are not a remodeler company) for resale in the Midway Woods and Belvedere area and the homes in Medlock Park are very similar. If it the plan that doesn't have stairs to the attic you would need to add a foundation and build out. You'll need to connect to the existing plumbing. You may find that your current plumbing needs to be upgraded. You may open a wall and discover termites (all of these things have happended to me, lol).
I'm guessing without seeing you'll be in the $20k ranch. Please consider the design and how if fits with the rest of the home. I've seen too many remodels that didn't consider how the remodel would "flow" with the rest of the home.
There are a number of options that make sense in the 1950's homes.
Obviously, each home and lot is unique, so these are just general comments. A contractor will be your best source.
No, I think you could add a bathroom for around $10k, depending on the featrures and the size. I know what you mean about that area. I sold one on Eastway to a couple and the previous owner had turned the garage into a master and bath.
Let me know if I can help. I know a contractor in that community, too.
Best of luck,
Buyer's Agent/Associate Broker