USPS-approved cluster box units (CBUs) typically last 15-25 years and cost about $2,000-$4,500 per unit to replace installed. The 8-16 door unit itself runs roughly $1,600-$3,500, with pedestal anchoring, concrete pad work, and labor adding $500-$1,000 or more. Salt air, vandalism, and lock wear are the main drivers of early replacement.
Last verified 2026-07-06
Typical useful life
15–25 years
2026 replacement cost
$2,000–$4,500
per unit (8-16 doors), national range
Typical HOA quantity
8 CBU units
Count every CBU on the property and budget per unit, not per project — boards routinely forget concrete pads ($10-$12 per sq ft), old-unit removal, USPS site approval, and rekeying/key distribution, which can add 25-50% to the sticker price. Large communities can phase replacement over 2-3 years, but keeping a consistent model simplifies USPS coordination.
Lubricate locks and hinges annually, touch up powder-coat scratches before rust starts, and keep the concrete pad draining away from the pedestal base. Promptly repairing vandalized doors and parcel lockers prevents forced-entry damage from spreading and can push units toward the 25-year end of the range.
Coastal and high-humidity regions shorten CBU life through corrosion, and dense urban markets add 15-30% to installation labor versus national averages.
National 2026 ranges · verify with local bids.
Typical small HOA: 8 CBU units
Set-aside = replacement cost ÷ useful life (15–25 years). A new installation funds toward the long end; an aging one needs catch-up funding — run the full calculator for that.
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Retrieved and verified 2026-07-06. National planning ranges — local bids govern. Informational only; not engineering, legal, or financial advice, and not a substitute for a professional reserve study. Report a data issue.
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