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Property Transaction History API

Retrieve property transaction history for any U.S. address including last sale date and price, prior transactions over ten years, price per square foot trajectory, ownership chain, deed types, mortgage history, and current owner of record — all from a single API call.

API Overview

This API provides real-time property transaction intelligence for any U.S. address by aggregating data from county recorder and assessor offices, public deed records, commercial real estate transaction databases, MLS historical data, and real estate news coverage of notable transactions. Real estate brokers, investment analysts, appraisers, acquisition underwriters, title professionals, and due diligence teams use this data to evaluate sale comparables, trace ownership chains, verify title history, benchmark price trajectories, and power investment and underwriting workflows across commercial and residential properties.

Transaction History

Surface the last recorded sale date and price alongside prior transactions going back up to ten years to rapidly build sale comps, verify ownership transfers, and support appraisal and underwriting models.

Price Trajectory Analysis

Track price per square foot trajectory across recorded transactions to benchmark appreciation, identify distressed sales, and power market-level and property-level investment analysis.

Ownership & Title Chain

Trace ownership chain, recorded deed types, and mortgage or refinance history to support title review, due diligence workflows, and investor-grade property intelligence.

Premium API

This is a premium API that utilizes advanced AI analysis across county recorder and assessor records, public deed filings, commercial real estate transaction databases, and MLS historical data to provide comprehensive property transaction history for any U.S. address.

25 credits per API call

Sample Results

Field Example Value Description
PropertyAddress 1 Vanderbilt Ave, New York, NY 10017 Normalized property address
PropertyType Commercial office tower Property type classification (single family, condo, multifamily, commercial, or land)
LastSaleDate No third-party sale recorded; property developed and held by SL Green since acquisition Most recent recorded sale date
LastSalePrice N/A — held by original developer Most recent recorded sale price
PriorTransactions 2016: JV formation with National Pension Service of Korea (27% interest); 2014: Hines JV (4.9% interest)... Prior recorded transactions going back up to ten years with dates and values
PricePerSqFtTrajectory Ground lease-based development; underlying land basis approximately $1,200/sq ft buildable Price per square foot trajectory across recorded transactions
OwnershipChain SL Green Realty Corp (71%) / NPS Korea (27%) / Hines (2%); ground lease with underlying land... Chain of ownership over the transaction history window
DeedTypes Multiple bargain and sale deeds recorded for parcel assemblage 2011-2014; JV agreements Deed types recorded (warranty deed, quitclaim, trustee's deed, etc.)
MortgageHistory $1.75B construction financing led by Wells Fargo and JP Morgan (2016); $3B refinancing (2021)... Notable mortgage, construction loan, or refinance history
CurrentOwner SL Green Realty Corp (NYSE: SLG) as JV managing partner Current owner of record as listed in public records
AssessorParcelNumber Manhattan Block 1277, Lot 19 (NYC ACRIS) Assessor Parcel Number (APN) or equivalent parcel identifier
PropertyReferenceURL https://a836-acris.nyc.gov Primary source URL for verification (county assessor or recorder)

API Details

Endpoint

https://api.interzoid.com/getpropertyhistory

Request Format

https://api.interzoid.com/getpropertyhistory?license=[licensekey]&address=[property address]

The lookup parameter is also accepted for compatibility with platform convention. Both parameters work identically.

Sample Request

https://api.interzoid.com/getpropertyhistory?license=fh5hs7*****&address=600+Montgomery+St+San+Francisco+CA+94111

Sample Response

{ "PropertyAddress": "600 Montgomery St, San Francisco, CA 94111 (Transamerica Pyramid)", "PropertyType": "Commercial office tower", "LastSaleDate": "October 2020", "LastSalePrice": "$650 million", "PriorTransactions": "October 2020: Sold by Aegon N.V. to SHVO led consortium for $650M; 1999: Aegon (formerly Transamerica Corporation parent) retained property after corporate acquisition", "PricePerSqFtTrajectory": "Approximately $1,075/sq ft on 2020 sale based on 605,000 rentable sq ft; below Class A San Francisco market peak of $1,400/sq ft", "OwnershipChain": "Aegon N.V. (1999-2020) → SHVO / Deutsche Finance / Baupost Group JV (2020-present)", "DeedTypes": "Grant deed recorded October 2020 for $650M transfer; subsequent loan assignments and JV amendments recorded", "MortgageHistory": "$537M acquisition and renovation financing arranged by Deutsche Bank at 2020 closing; mezzanine financing from Cerberus; subsequent refinancing completed 2023", "CurrentOwner": "SHVO led JV with Deutsche Finance America and Baupost Group", "AssessorParcelNumber": "SF Block 0228, Lot 005 (San Francisco Assessor-Recorder)", "PropertyReferenceURL": "https://www.sfassessor.org", "Code": "Success", "Credits": "20220031" }

cURL Example (with API key in header)

curl --header "x-api-key: fh5hs7*****" "https://api.interzoid.com/getpropertyhistory?address=600+Montgomery+St+San+Francisco+CA+94111"

Additional Examples

Here are additional real-world examples showing the API's coverage across different transaction profiles — from major commercial transactions to trophy residential sales and non-disclosure state limitations:

Major Commercial Transaction Trophy CRE

{ "PropertyAddress": "9 W 57th St, New York, NY 10019 (Solow Building)", "PropertyType": "Commercial office tower", "LastSaleDate": "No third-party sale recorded; held by founding family", "LastSalePrice": "N/A — family-held asset", "PriorTransactions": "1974: Completed construction by Sheldon Solow; no recorded arms-length sale since development. Estate planning transfers recorded 2020-2023 following Sheldon Solow's death in 2020", "PricePerSqFtTrajectory": "Estimated market value approximately $2,500/sq ft based on comparable trophy Plaza District transactions; approximately 1.6M sq ft rentable", "OwnershipChain": "Solow Realty (founder Sheldon Solow 1974-2020) → Solow estate / Stefan Soloviev and related trusts (2020-present, rebranded Soloviev Group)", "DeedTypes": "Estate and trust transfer deeds recorded 2020-2023; no third-party conveyance instruments", "MortgageHistory": "Historically unencumbered by recorded mortgages; reported use of private family financing for operations", "CurrentOwner": "Soloviev Group (Stefan Soloviev and related family trusts)", "AssessorParcelNumber": "Manhattan Block 1274, Lot 22 (NYC ACRIS)", "PropertyReferenceURL": "https://a836-acris.nyc.gov", "Code": "Success", "Credits": "20220006" }

Active Residential Market Residential

{ "PropertyAddress": "Example residential address, Miami Beach, FL 33139", "PropertyType": "Single family residential", "LastSaleDate": "March 2024", "LastSalePrice": "$4.2 million", "PriorTransactions": "March 2024: Sold for $4.2M; November 2020: Sold for $2.8M; August 2015: Sold for $1.65M; March 2008: Sold for $1.1M", "PricePerSqFtTrajectory": "Approximately $1,050/sq ft (2024) up from $700/sq ft (2020); $412/sq ft (2015); $275/sq ft (2008) based on approximately 4,000 sq ft of living space", "OwnershipChain": "Four recorded ownership transfers since 2008; current owner is an LLC incorporated in Delaware", "DeedTypes": "Warranty deeds recorded for each 2008, 2015, 2020, and 2024 transactions", "MortgageHistory": "$2.8M purchase mortgage (2024) from a national lender; prior $1.4M mortgage satisfied 2020 at sale; no current recorded liens beyond purchase money mortgage", "CurrentOwner": "Delaware LLC as grantee; beneficial ownership not disclosed in public records", "AssessorParcelNumber": "Miami-Dade County Folio (example format)", "PropertyReferenceURL": "https://www.miamidade.gov/pa/", "Code": "Success", "Credits": "20219981" }

Non-Disclosure State Limitation Limited Data

{ "PropertyAddress": "500 W 2nd St, Austin, TX 78701 (Indeed Tower)", "PropertyType": "Commercial office tower", "LastSaleDate": "January 2022 (date recorded; price not disclosed per Texas law)", "LastSalePrice": "Not disclosed — Texas is a non-disclosure state and sale prices are not required on recorded deeds", "PriorTransactions": "January 2022: Sold by Trammell Crow Company and Principal Real Estate Investors to Kayne Anderson Real Estate (price not publicly disclosed); 2018-2019: Development and construction completed; ground lease established with Travis County prior to development", "PricePerSqFtTrajectory": "Not calculable — sale prices not disclosed in Texas public records. Industry reports estimate 2022 transaction at approximately $590/sq ft on 580,000 sq ft building", "OwnershipChain": "Trammell Crow Company / Principal Real Estate Investors (developers, 2018-2022) → Kayne Anderson Real Estate (2022-present)", "DeedTypes": "General warranty deed recorded January 2022; ground lease amendments recorded", "MortgageHistory": "Construction financing recorded 2018 (amount not disclosed); acquisition financing recorded 2022 (amount not disclosed); subsequent modifications recorded", "CurrentOwner": "Kayne Anderson Real Estate affiliate (KA Indeed Tower Owner LLC or similar)", "AssessorParcelNumber": "Travis County parcel (available in assessor roll)", "PropertyReferenceURL": "https://www.traviscad.org", "Code": "Success", "Credits": "20219956" }

Multi-Transaction Investment Property Value-Add

{ "PropertyAddress": "Example multifamily property, Denver, CO 80202", "PropertyType": "Multifamily apartment building (150+ units)", "LastSaleDate": "August 2023", "LastSalePrice": "$48.5 million", "PriorTransactions": "August 2023: Sold for $48.5M to regional multifamily investor; February 2019: Sold for $32M to value-add sponsor; July 2014: Sold for $18.5M; November 2006: Sold for $14.2M", "PricePerSqFtTrajectory": "Approximately $310/sq ft (2023) up from $205/sq ft (2019); $118/sq ft (2014); $91/sq ft (2006) on approximately 156,000 sq ft of rentable area", "OwnershipChain": "Original developer (pre-2006) → Regional investor LLC (2006-2014) → Private equity sponsor (2014-2019) → Value-add sponsor LLC (2019-2023) → Regional multifamily investor LLC (2023-present)", "DeedTypes": "Special warranty deeds recorded for each 2006, 2014, 2019, and 2023 transactions", "MortgageHistory": "2023: $31M Freddie Mac Optigo financing; 2019: $22M bridge loan from debt fund; 2014: $12M CMBS loan; 2006: original acquisition financing satisfied at 2014 sale", "CurrentOwner": "Colorado LLC affiliated with regional multifamily investor", "AssessorParcelNumber": "Denver County Assessor parcel (example format)", "PropertyReferenceURL": "https://www.denvergov.org/content/denvergov/en/office-of-the-assessor.html", "Code": "Success", "Credits": "20219931" }

These examples demonstrate the API's ability to surface property transaction intelligence across the full real estate spectrum — from major trophy commercial transactions to value-add multifamily assets and active residential markets. Please note that twelve U.S. states (including Texas, Utah, Wyoming, Idaho, Kansas, Missouri, Mississippi, Montana, Alaska, New Mexico, North Dakota, and parts of Louisiana) do not require sale prices on recorded deeds, so LastSalePrice and historical prices will return as "Not disclosed" for addresses in those jurisdictions. The API provides accurate data where public records support it and clearly identifies limitations where state law restricts disclosure.

Try the API within a Web Application

Interactive Application

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Additional Resources

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