The U.S. housing slump is creating another negative ripple effect, this one by extension, or by association, if you will, as in condo/co-op association.

Owners in condo associations are having to chip-in to pay for unexpected association maintenance, tax, and related fees when other residents enter foreclosure or are substantially behind in payments, The New York Times reported Thursday.

The Times cited the case of condo owners in a 43-story Miami, Florida condo having to ante up more money after 1 in 6 residents battled foreclosure. The additional charge: an additional $1,000 assessment and $50 more a month for cable and internet fees, on top of the regular $450 monthly maintenance.

Connecticut-based appraiser Lawrence Schmidt, not a realtor but a former 15-year condominium owner with extensive knowledge of the sector, told BloggingStocks Thursday prospective buyers need to fully-research a condo association's membership status, including record of tax payments of individual members, in addition to the standard evaluation of the condo association's maintenance fees, contractor services, and quality-of-life issues, etc. Co-op buyers must do even more research on the co-op's balance sheet, monthly budget, cash flow, outstanding mortgage, and other related financials, he said.