Property History: How to Look Up Past Owners, Sales, Permits and Liens
Property history lives in four public offices, not one. Where to find past owners, sale prices, permits and liens, ranked by reliability, with recent sales data.
Quick answer
Property history is the record of who owned a property, what it sold for, what work was done on it and what claims were recorded against it. No single database holds all of it. The county recorder is the most reliable source, followed by the assessor, the building department and the tax collector.
What is property history?
People use the phrase for several different questions. A buyer wants to know whether the house has been flipped. A neighbor wants to know who owned the lot before. A homeowner wants to know whether the 1990s addition was permitted. Each question is answered by a different public office, and the offices do not share one database.
That is why a lookup works best as a short checklist. Start with the office that holds the legal record, then add the offices that hold the physical and financial record. This guide ranks them by how reliable each one is, and points to the official page for each place HeritageDeed covers.
For the single question of who owns a property today, see how to find out who owns a property. For the ordered line of transfers, see chain of title.
Definition
Property history — The documented record of a specific parcel over time: its owners, the prices and documents that moved it, the permits and violations on the building, its tax record, and the liens and mortgages recorded against it.
Where is property history kept?
Four kinds of office hold the pieces. The table shows what each one can tell you and where it is weakest. The order is by reliability for ownership questions, with the strongest source first.
| Rank | Source | Best for | Main weakness |
|---|---|---|---|
| 1 | County recorder or clerk (recorded documents) | Past owners, deeds, mortgages, releases, recorded liens | Indexed by name, so common names return noise; sale price is not always on the document |
| 2 | Assessor (sales and ownership data) | Sale dates and prices, parcel number, building description, assessed value | Built from the recorded documents, so it can lag or carry coding errors |
| 3 | Building department | Permits, inspections, violations, certificate of occupancy | Says nothing reliable about ownership; owner names on permits are as filed |
| 4 | Tax collector or treasurer | Payment history, unpaid balances, tax liens | Shows who is billed, not who holds title |
How do you look up a property history step by step?
Get the parcel identifier
Search the assessor site by address and note the parcel number. In New York City it is the borough, block and lot, which our guide on the BBL explains. In Cook County it is the 14-digit PIN. Everything else is easier with the parcel number.
Pull the deeds from the recorder
Search the recorder or clerk index by address, parcel or party name. List each deed with its date, type, grantor (seller) and grantee (buyer). Work backward from the current owner. The chain of title guide shows how to check that the links connect.
Add sale prices from the assessor
Use the assessor record or the county open data for the sale date and price. Compare each one with the deed. A price of zero or a few dollars usually means the transfer was not an arm's length sale.
Check the building department
Search permits, open violations and the certificate of occupancy by address or parcel. Look for work that has no matching permit and for violations that were never closed.
Check the tax record
Look at the treasurer or collector for unpaid balances. Our property tax records lookup guide covers each county.
Search for liens and open mortgages
Scan the recorded documents for mortgages without a matching release, judgments and mechanics liens. See how to check for liens on a property.
How do you find past owners and sale prices?
Past owners come from the recorder. Sale prices come from the assessor or from transfer tax filings. The deed is the legal proof of each transfer, and the assessor record is a convenient summary built from it.
In New York City, the Department of Finance runs ACRIS. Its page says ACRIS "allows you to search property records and view document images for Manhattan, Queens, Bronx, and Brooklyn from 1966 to the present" (NYC Department of Finance, ACRIS). Staten Island is noted separately on the same page for filing, so check the page for how to search it. Our guide to reading ACRIS records walks through the document types.
In Philadelphia, the Department of Records keeps deeds, mortgages, satisfactions, releases and easements from the late 17th century to the present, and the city says you can look them up online, in person or by mail. It also notes that recorded documents are not searchable until two to four weeks after recording, and that records from before 1973 may have to be pulled from the City Archives (City of Philadelphia, Get a copy of a deed or other recorded document). See also our Philadelphia deed search guide.
In Harris County, Texas, the County Clerk runs the real property search. Its portal lets you search by file number, grantor, grantee, subdivision, instrument type and other fields, and states that images are available from 11/1/1960 (Harris County Clerk, Real Property search).
In Cook County, Illinois, the Assessor publishes parcel sales as open data, which is the quickest way to see sale dates, prices and deed types for a parcel. Our Cook County deed search guide covers the recorder side.
How many sales and deeds are recorded in a year?
Property history is not a rare event. The official open data shows how much recorded activity there is in a single year, and how many transfers carry no real price.
NYC Department of Finance data for the 12 months from 2025-09-01 to 2026-08-31 lists 52,363 sales across the five boroughs when the borough counts are added together. Of those, 29,588 were nominal transfers, meaning recorded at $10 or less, which is typical of transfers between family members, into trusts or between related entities. A nominal transfer is a real link in the chain of title, but it tells you nothing about market value.
The figures come from NYC Department of Finance, Citywide Rolling Calendar Sales. Sale counts are not unpaid-loan counts or foreclosure counts, and a single sale can cover more than one parcel.
| Borough (county) | Sales | Median price | Nominal transfers ($10 or less) | Nominal share |
|---|---|---|---|---|
| Manhattan (New York County) | 15,029 | $1,395,000 | 4,455 | 22.9% |
| Brooklyn (Kings County) | 13,583 | $1,140,000 | 9,317 | 40.7% |
| Queens | 15,665 | $780,000 | 10,675 | 40.5% |
| Bronx | 3,932 | $700,000 | 2,448 | 38.4% |
| Staten Island (Richmond County) | 4,154 | $735,000 | 2,693 | 39.3% |
What do Philadelphia and Cook County records show?
For Philadelphia, the city's Department of Records transfer data covers 2025-10-03 to 2026-08-11. In that period it lists 29,132 recorded deeds, of which 19,282 were sales, with a median sale price of $270,000. It also lists 2,235 sheriff deeds, 44,182 mortgages, 28,925 satisfactions and 11,615 assignments (City of Philadelphia, Real Estate Transfers).
Mortgages and satisfactions are counted separately because a mortgage that was never satisfied can stay on the record long after the loan was paid. Those counts are recorded documents, not counts of unpaid loans.
For Cook County, the Assessor's parcel sales data for 2025-08-13 to 2026-08-12 lists 62,543 sales with a median price of $370,000 (Cook County Assessor, Parcel Sales). The deed types in that data include warranty deeds (44,359), trustee deeds (8,467), quit claim deeds (865) and executor deeds (508), which is why a Cook County history often needs a second look at the deed type behind each sale.
What does the assessor add to a property history?
The assessor is the fastest place to start because it is searchable by address, and it shows the parcel number, the building description and the values on which tax is based. It is a summary, not the legal record.
Cook County: the Assessor's site has a property search by address, by PIN and by neighborhood, with 14-digit, 10-digit and 8-digit PIN search options listed (Cook County Assessor's Office). It also lists a "Download Open Data" page for bulk records.
Harris County: the Harris Central Appraisal District offers a property search, a property tax database and a public data page. It also lists a Deed Protection service in which you can register your home with the County Clerk's Office to help protect against deed fraud (Harris Central Appraisal District).
Maricopa County: the Assessor's site offers a parcel search and a parcel viewer map, with a help page titled "What is my parcel number?" (Maricopa County Assessor's Office). The Maricopa recorder's site blocks automated access, so we could not read it for this guide. Our Maricopa County lien search guide explains the recorder side.
The assessor and the recorder disagree more often than people expect, because one works from the other. If a deed and the assessor record conflict, the recorded deed controls.
Where do you find permits and violations?
Permits and violations come from the city or county building department. They describe the building, not the owner. They are the only official place to learn whether an addition, a conversion or a major repair was approved.
In New York City, two agencies matter. The Department of Buildings publishes permit and filing data, and its open data portal lists a dataset titled "DOB Permit Issuance" (NYC Open Data, DOB Permit Issuance). The Department of Housing Preservation and Development runs HPD Online, which it says can show information about a building such as complaints and violations, property registration, charges and litigation, block and lot information and vacate orders (NYC HPD, HPD Online). Our guide on HPD and DOB violations for buyers explains what the entries mean.
In Philadelphia, the city's property services page lists a Certificate of Occupancy application, a contractor lookup and a historic property search among its property services (City of Philadelphia, Property, lots & housing). The same page describes the Certificate of Occupancy as required by the City for some construction projects.
Elsewhere, search the city or county building or code enforcement office by address. Unincorporated areas are often handled by the county, and each place has its own portal.
Why does property history differ between sources?
What will a property history not show?
Public records have gaps. A history built only from online lookups can miss:
- Documents that were signed but never recorded, such as an unrecorded deed or an informal agreement.
- Work done without a permit, which leaves no permit record at all.
- Older records that are not indexed online, including some pre-1973 Philadelphia records that may sit with the City Archives.
- Recently recorded documents, because indexes can take days or weeks to catch up.
- The reason for a nominal transfer, which the price alone does not explain.
Where does a records search fit in?
A records search pulls the recorded documents and puts them in order, which covers the first rank in the table above. HeritageDeed reports the current owner for $49, the current and previous owner for $79, and a 30-year search for $129, in the counties on the title search coverage page. It is not title insurance and not legal advice, and it does not replace the building department or the tax office for permits and tax balances.
Key takeaways
Key takeaways
- Property history is spread across the recorder, the assessor, the building department and the tax office. No single site has all of it.
- The recorded deed is the most reliable proof of past owners. The assessor record is a summary built from it.
- Building departments are the only official source for permits and violations, and they say little about ownership.
- A price of $10 or less is usually a family, trust or related-party transfer, not a market sale. In New York City, 29,588 of 52,363 sales from 2025-09-01 to 2026-08-31 were nominal.
- Check each link and each lien in the recorded documents before relying on any summary.
Frequently asked questions
- How do I find the history of a property?
- Start with the assessor to get the parcel number, then search the county recorder for deeds, mortgages and liens. Add the building department for permits and violations, and the tax office for payment history. Each office holds a different piece, so use all four.
- Where can I see past owners of a property?
- The county recorder or clerk holds the deeds that name past owners. In New York City, ACRIS covers Manhattan, Queens, the Bronx and Brooklyn from 1966. Philadelphia, Harris County and Cook County each have their own recorded document search.
- Can I see what a house sold for in the past?
- Often yes. The assessor or county open data usually lists sale dates and prices. In some places the deed does not show the price, and transfers recorded at $10 or less are usually not market sales, so compare the price with the deed type.
- How do I check permit history for a property?
- Search the city or county building department by address or parcel. In New York City, the Department of Buildings publishes permit issuance data, and HPD Online shows violations. Missing permits mean either no work was done or the work was never filed.
- Are property ownership records public?
- Yes. Deeds and other recorded documents are public records kept by the county recorder or clerk, and the assessor publishes owner and sale data. Some recent documents may not appear online for days or weeks after recording, so a very recent sale may be missing.
- Is a property history report the same as a title search?
- No. A property history summarizes owners, sales, permits and taxes. A title search examines the recorded documents for ownership defects and liens. Neither one is title insurance, which is a separate contract that pays for covered losses.
- Why do two sources show different owners for the same property?
- The assessor and the tax office update from recorded deeds, and updates can lag. A tax bill may also go to a prior owner or a mortgage servicer. When sources conflict, the recorded deed is the controlling document.
Sources
Primary records and official documentation cited in this article.
- 1NYC Department of Finance, ACRIS
- 2NYC Department of Finance, Citywide Rolling Calendar Sales (NYC Open Data)
- 3NYC Housing Preservation and Development, HPD Online
- 4NYC Open Data, DOB Permit Issuance
- 5City of Philadelphia, Get a copy of a deed or other recorded document
- 6City of Philadelphia, Property, lots & housing
- 7City of Philadelphia, Real Estate Transfers (OpenDataPhilly)
- 8Cook County Assessor's Office, Parcel Sales (Cook County Open Data)
- 9Cook County Assessor's Office, home page
- 10Harris County Clerk, Real Property search
- 11Harris Central Appraisal District, home page
- 12Maricopa County Assessor's Office, home page
HeritageDeed provides public-record search reports only. Reports do not constitute title insurance, an attorney opinion of title, or a title insurance commitment.