You are ordering a date
The appraisal is what gets built around it, and if the date is wrong then everything built on it is wrong with it.
This matters more here than on any other page of the site, because retrospective dates almost always arrive second-hand. An accountant tells an executor a date. A paralegal passes along a date from a file. Somebody remembers what they were told last year. By the time it reaches me it has been through three people, none of whom were asked to check it against what the report is actually for.
So tell me the purpose, not just the date. If they do not match I would rather say so before starting than hand you a competent report answering the wrong question.
What “retrospective” actually requires
A value opinion for a day that has already passed, developed only from what was knowable on that day.
That last part is the whole discipline and it is harder than it sounds. The sales relied on are the ones that closed at or near the effective date. The market conditions described are the ones that actually obtained then. What happened afterwards — the run-up, the correction, the rate move, the new development down the road — is not evidence about what a buyer would have paid on that day, however obvious it all looks in hindsight.
Contamination by hindsight is the most common way one of these fails on review, and it usually enters innocently, through a comparable sale chosen because it looked right rather than because it closed at the right time.
The report carries two dates on its face: the effective date and the date the report was written. That visible gap is what tells a reader it is a retrospective opinion rather than a stale one.
Where the property no longer looks the same
Frequently it has been sold, renovated, cleared or knocked about since.
That does not stop the assignment. It changes what the report can claim about condition, which then has to come from documentation — listing photographs, an inspection report, permits, a family member’s account. The report states openly that it assumes the property stood in that condition on the effective date, and names that as an extraordinary assumption rather than burying it.
A report that admits what it could not observe is worth more than one that reads as though nothing were missing. The second kind falls apart the moment somebody asks the obvious question.
A later sale is evidence, not an answer
People often assume that if the property sold afterwards, the sale settles it.
It gets analysed, certainly. But a sale eighteen months after the effective date carries eighteen months of market movement inside it, and a sale to a relative or a fast one to clear an estate may not reflect market conditions at all. It goes into the analysis alongside the sales from around the effective date, weighted for what it actually shows.
How far back this works
Further than most people expect. The constraint is data, not distance.
New Jersey keeps good public records — the county clerks for deeds, MOD-IV for assessment history — so a date well over a decade back is ordinarily workable in a municipality with real turnover. Clifton, Bergenfield, Bloomfield: fine.
Thin markets are the harder case. A township that recorded a handful of relevant sales in the year in question cannot support the same confidence, and in this service area that mostly means the northern Passaic townships. Where the data is thin the report says so and explains what was used instead, rather than dressing three weak sales as a comparable set.
New Jersey specifics
- Date-of-death work for the New Jersey inheritance tax and for the heirs' basis runs to the date of death, which can be years back where an estate took a long time to settle.
- Insurance and casualty claims generally run to the day before the event, and it is the policy wording that fixes that date rather than the claimant.
- New Jersey keeps good public sales records through the county clerks and MOD-IV, so older dates are generally workable — though the data thins out in low-turnover municipalities, which in this service area means the northern Passaic townships more than anywhere else.
What you receive
- A report carrying both the past effective date and the date of the report, so the retrospective basis is visible on its face
- Comparable sales that closed at or near the effective date
- An analysis of market conditions as they actually stood then
- Disclosure of any extraordinary assumption about condition at that date
- Signed USPAP certification
What I need from you
- The exact date required, and what it is required for
- Whatever documents condition at that date — photographs, listing sheets, inspection reports, permits
- Access now, where the property still stands in comparable form