New Jersey property-tax definition
Added assessment
An additional assessment imposed when taxable new construction or an improvement is completed after the regular assessment date.
Worked New Jersey example
A completed addition can create an added assessment for the portion of the tax year after completion, so the seller's old bill may not represent the future carrying cost.
Why it matters
Watchdog keeps the definition beside the property data so users can distinguish an observed public record from an interpretation or derived screening signal.
Official source
For homeowners
Use the term to understand what a tax or assessment record is actually saying before assuming it represents market value or a future bill.
For professionals
Keep the source and observation date with the number, verify the authoritative record, and document any calculation or professional conclusion separately.