The Connecticut State Library issues a retention schedule for the State Government, Towns, etc.  These are their recommendations from 2012

 

Annual Reports/ Meeting — Permanent

Annual tax levy –– 3 years or until audited

Bank statements — 3 years or until audited

Bills paid — 3 years or until audited

 ByLaws— permanent

Cancelled checks — 3 years or until audited

Correspondence – 2 years

Deeds or easements — permanent

Foreclosure – 1 year after case closed

Insurance — 3 years or until audited

Litigation files (court cases) — 5 years after resolution

Meeting records/minutes — permanent

Newspaper clippings — 2 years

Website — until updated