Stale Property Listing Detection Core point A stale listing may remain online after
Stale Property Listing Detection Core point A stale listing may remain online after sale, withdrawal or price change, so an active URL does not prove the property is still available. How to verify it Track first-seen date, last update and price history and verify availability directly before treating it as active supply.
Decision impact Do not use a stale listing as a comparable without knowing whether the price was merely an unaccepted ask or whether property attributes changed. Detecting stale property listings Old or repeatedly reposted listings can reveal a property that is difficult to sell and can strengthen the buyer’s negotiating position.
Use image archiving or reverse-image techniques to identify the earliest online appearance, track historical asking-price increases and reductions, compare listings from different agents for contradictory price/specification data, and investigate why the property remained on the market, including legal defects, overpricing or structural issues. Evidence to retain Record the first observed listing date, a Price History Log, and links or captures of parallel listings from multiple agencies.
Decision use In an active market, a listing that remains unsold for more than six months is treated by the supplied material as a negotiation signal that may reflect excessive pricing or an unresolved title/technical problem. The age of the listing can be used to support a lower, evidence-based offer to a motivated seller.
Source time point: More than six months on the market in an otherwise active market is treated as a warning signal that deserves price, title and structural investigation.
Valuation validity and property identity
Match the taşınmaz number, ada/parsel, independent-unit number and description to the transaction, and confirm the valuer is authorised within the SPK framework when such authorisation is required. TKGM states that valuation reports issued before 9 December 2024 had a three-month validity window, while a Tutar Tespit Belgesi issued after that date has a six-month validity period; material changes to the property or application can also require a fresh valuation. TCMB housing price indices provide market-movement context, not the value of one unit. Turn the review topic into provable facts: identity, date, amount, registry status, document or technical condition.
Keep inspection date, report date, methodology and comparables, legal versus actual area, restrictions and assumptions distinct, and never let one valuation figure replace title, zoning or building-status checks. The key is not merely that a signature or advertisement exists, but that the person acting had the legal capacity and authority for that act, on that date and within that scope. A valuation report should not be used outside its purpose, date and property identity. For each fact use a source capable of proving it and link the result to its effect on purchase, ownership or cost.
From market data to testable cash flow
TCMB publishes the House Price Index to track housing-market price movements and, in 2026, began publishing the New Tenant Rent Index to capture new-rental price developments more quickly than rent measures that include existing contracts. These indices do not provide the sale price or rent of one unit, so they must be combined with verifiable local comparables. For each fact use a source capable of proving it and link the result to its effect on purchase, ownership or cost. Calculate gross yield from annual rent relative to price, then calculate net yield after vacancy, management, maintenance, insurance, taxes, dues and non-recoverable costs.
For a capitalization rate, use NOI before debt service and distinguish property performance from leveraged equity return. Any rent-growth, resale-price or interest-rate assumption should be stress-tested with alternative scenarios rather than accepted as a single forecast. The key is not merely that a signature or advertisement exists, but that the person acting had the legal capacity and authority for that act, on that date and within that scope. Property investment analysis must separate market data from the calculation for the specific asset. Turn the review topic into provable facts: identity, date, amount, registry status, document or technical condition.