Regarding finishing---oh buy, that depends on your pocket book.
M. Leon Construction at (503) 643-6631 or Ability Plus Drainage at (503) 246-0474. They will give you an assessment and bid on the work.
Janeese Jackson, Principal Broker
Real Estate Resource
Think of the Grand Canyon and you will realize that water will go where it wants to and it always flows downhill.
All basement water problems and basement moisture problems are caused by poor or improper drainage of rain and runoff water outside the house.
When trying to fix water problems on an existing home, or prevent them on new construction, there are no shortcuts.
Get rid of the water and you get rid of your problem. You can read how to on my Wet Basements article (http://www.byoh.com/basementmoisture.htm).
Tom Inglesby, Broker
RE/MAX Equity Group
As everyone here has said, it's impossible to say without getting some solutions from experienced foundation and water issue companies. For a flooding basement I would definitely find someone to do it right! Anyone you hire should be a Licensed Contractor and I would recommend that you check their license background at the Oregon Contractors Board website: see link below.
I'm not saying these are the right contractors for you or your job, you'll need to interview and decide who has the best solution for you. But myself and/or my clients have had good experiences with John's Basement and Pascal at M Leon Construction. They're both local and it would be easy to find their contact info. Of course, our experience isn't necessarily everyone's experience so you'll want to do your own diligence in selecting someone.
Best of luck! send me an email if you have any questions
No way to answer that question. Some issues may get resolved with improving the drainage from outside and can cost very little. Others may require major excavation to expose the concrete and seal it.
I would start by checking the downspout. Are they dumping the rain right next to the house or are they tied in to a drain line leading away from the house? Are their tree roots penetrating the foundation creating access points for water?
If you are seriously considering buying a home with these issues start with a good inspector and consider what they have to suggest. If necessary you may need to talk to contractor who does this type of work. Your inspector or agent may have a referral for you to consider. Best of luck.