Carl's numbers are good, average HOA fee is $270.
Dawn brings up a good point, are you referring to the HOA fee or just the typical cost of a condo on a monthly basis. Either way, anything less than $300. is pretty good. Of course you'll need to know what is included: pool, landscaping, water, trash, insurance....
If you are looking for the average HOA monthly fee for condos and townhouses in Union City, here is the data for 2011:
Average condo HOA fee: $270/month
Highest: $419/month - Copa Del Oro Complex
Lowest: $175/month - Pacific Terrace Complex
Average townhouse HOA fee: $228/month
Highest: $385/month - VIlla Alvarado Complex
Lowest: $165/month - Pacific Terrace Complex
If you are talking about the HOA fee, it depends on the size of the project and amenities. Smaller buildings with no amenities can be under $200 per month, and larger ones can be significantly higher. I would think that on average Joanne's range is a good average.
If you are talking about maintaining your unit, this depends a lot on the age and condition and what things are covered by the HOA. Typically you will be responsible for any repairs in your unit.
Lance King/Owner-Managing Broker