How to Build a New York City Offer Range From Comparable Evidence

Start with the subject borough and property type. The New York City Department of Finance publishes borough rolling-sale files for the prior 12 months with property identifiers, classifications, characteristics, sale price, and sale date. Treat the price as recorded transfer consideration, investigate zero-price and other non-arm's-length records, and remember that the Department's neighborhood label can differ from common neighborhood boundaries. Select the most comparable usable sales and make only market-supported adjustments. The result should be a documented range and negotiation input, not an appraisal or guaranteed offer price.

This public method does not produce a property-specific target offer, customary overbid percentage, or guaranteed winning price. No admissible source opened for this topic emits private negotiation outcomes or an address-specific value. It also does not use any named target address, owner, buyer, seller, or private comparable set. Person-level and transaction-private facts are outside this market-only pack. The public Department of Finance rows do not contain list price, days on market, percent of asking price, contingencies, or seller credits.

Read the rolling-sales fields and vintage correctly

The New York City Department of Finance Rolling Sales Update provides borough files covering tax classes 1, 2, and 4 sold during the prior 12 months. The files include neighborhood, building type, square footage, and other property data.

The Manhattan Rolling Sales file opened for this evidence pack covers sales from August 2025 through July 2026, with PTS sales data as of August 6, 2026. It exposes property identifiers, building category, tax class, address or apartment, ZIP code, unit counts, square footage, year built, sale price, and sale date.

These are recorded-transfer and property fields. They do not include private MLS or contract terms. Record the file vintage in the worksheet so a later reviewer knows exactly which public dataset supported the analysis.

Verification checklist

• Verify the subject borough and property type.
• Pin the rolling-sales file period and data-as-of date.
• Screen zero-price and suspect transfer records.
• Compare physical and legal characteristics.
• Verify what the Department's neighborhood label means.
• Record every included and rejected transfer.
• Support adjustments with market reaction rather than a rule of thumb.

Screen transfer records before treating them as comparables

The Manhattan file lists condo and co-op sales at the unit level with a building-unit count of one. It also contains zero-dollar sale-price rows. A zero-dollar row is a transfer record to investigate or exclude, not a usable market-price observation by default.

Start with borough and property type, then screen the sale price, sale date, class, physical characteristics, and transfer context. The current file can describe property attributes that differ from attributes at the time of sale, so the public record still requires judgment before it enters a comparable set.

The Department's Glossary of Property Sales Terms explains that its neighborhood field is an assessor neighborhood that may differ from commonly accepted boundaries. Do not relabel an assessor-neighborhood field as a familiar submarket without independent boundary verification.

Field	Supported use	Flag or reject
Borough and property type	Define the relevant record universe	Wrong borough or mismatched property type
Sale price and sale date	Recorded transfer input with pinned vintage	Zero price or suspect transfer
Square footage, year built, class	Physical and legal similarity screens	Missing or materially mismatched characteristics
Neighborhood field	Assessor sorting field	Unverified common-neighborhood interpretation
Adjustment evidence	Market-reaction support	Rule-of-thumb dollar or percentage

Use market-supported comparisons and adjustments

Fannie Mae's comparable-sales policy says comparables should have similar physical and legal characteristics and reflect the market area from which demand and competition come. It permits an older sale or one from a competing area when it is the best available and the choice is explained.

Use that policy as a documented screening framework, not as universal law or a buyer appraisal. The worksheet should show why every transfer competes for similar market participants and why an older or wider-area sale was retained.

Fannie Mae's adjustment guidance requires adjustments to reflect market reaction rather than an arbitrary or rule-of-thumb amount. It also says seller-concession effects require market analysis instead of an assumed face-value adjustment. No fixed adjustment table or customary percentage is supported here.

The output should record the selected and rejected transfers, any market-supported adjustment evidence, assumptions, and a price range. This is a buyer decision workflow, not an appraisal or a guaranteed winning offer price.

What the public evidence cannot determine

The rolling-sales files do not establish a property-specific target offer, customary overbid percentage, or guaranteed winning price. No opened admissible source supplies private negotiation outcomes or an address-specific value.

The files also do not provide list price, days on market, percent of asking price, contingencies, or seller credits for the public rows. Do not infer those fields or supplement them with unnamed private data.

For separate market and lifestyle context, review the guides to financing, cash proof, appraisal, and lender timing, the true monthly cost of owning in New York, seasonality and listing timing, and remote discovery and shortlist verification. Those topics are distinct from comparable-sale evidence for a specific home.

Frequently asked questions

Does a Department of Finance sale price equal a list price or appraisal?

No. It is a recorded transfer field that still needs transaction and property screening. The public file does not provide list price or an appraisal conclusion.

Can I use the Department of Finance neighborhood label as a familiar neighborhood boundary?

Not automatically. The Department says its assessor-neighborhood label may differ from commonly accepted boundaries. Verify the intended geography independently.

Should I apply a standard dollar adjustment for an extra bedroom or concession?

No fixed schedule is supported. Fannie Mae's adjustment policy calls for market-reaction evidence and does not support a customary dollar or percentage rule.

Can this method price a specific New York City home?

No. It supports a documented evidence workflow and price range. It contains no named target address, private comparable set, address-specific value, or guaranteed offer result.

Source record

• New York City Department of Finance, Rolling Sales Update.
• Manhattan Rolling Sales, August 2025 through July 2026.
• New York City Department of Finance, Glossary of Property Sales Terms.
• Fannie Mae B4-1.3-08, Comparable Sales.
• Fannie Mae B4-1.3-09, Adjustments to Comparable Sales.