I think you need a paraphrase here: "The community houses/hosts male underage criminal and civil offenders between the ages of..."

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Note added at 15 hrs (2010-11-04 09:52:46 GMT)
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Here is an example of the use of "civil offender." Agreed, it's perhaps not that common...but it is used, including in published legal textbooks:

"For civil offenses, a citation or "notice to appear" might be handed--or simply mailed--to the offender. Generally, the civil offender is not required to sign the citation under penalty of arrest for refusal to sign. Failure to appear as directed, however, can subject the civil offender to penalties. Criminal infractions are administered by the courts; civil infractions are often administered by non-judicial administrative agencies."
From "Paralegal Studies: An Introduction," by Paul D. Jordan, p.241
http://books.google.it/books?id=b2Q5v0_se8QC&pg=PA241&lpg=PA...

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Note added at 15 hrs (2010-11-04 09:56:00 GMT)
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Perhaps another paraphrase which would avoid the use of "civil offender" is:
"The community houses juvenile males between the ages of ... who have committed both civil and criminal offenses."

"Civil and criminal offenses" is certainly much more frequent, with 238,000 hits on google.