The National Register of Historic Places is the United States’ official list of places considered worthy of preservation, from houses and bridges to battlefields and archaeological sites. This article explains who runs it, how a property gets on it, and, just as important, what a listing does and does not do.
What the National Register is
According to the National Park Service (NPS), which maintains it, the Register is the official federal list of districts, sites, buildings, structures and objects significant in American history. It was authorized by the National Historic Preservation Act of 1966 as part of a national program to identify, evaluate and protect historic and archeological resources.
The key word is “list.” The Register is a record of significance, not a museum, a park system or a regulatory agency. Places on it stay in the hands of their owners, whether those are families, congregations, businesses, cities, tribes or federal agencies. A property must be significant to its community, its state or the nation to qualify.
That makes the Register different from other heritage programs readers may know. The NPS describes National Historic Landmarks as a separate designation: once a property is designated a landmark, it is also listed in the National Register if it is not already. Visiting a national park, a topic covered in planning a national park visit, is a different experience from walking past a listed corner bank building. The Register mostly covers places that stay in ordinary use.
How big is the list?
The NPS pages give different round numbers, depending on the page and its date. One NPS page says that more than 100,000 properties had been listed as of mid-2025, representing some two million contributing resources, meaning the individual buildings, sites, structures and objects that count toward a district’s significance. Another NPS page, on its database of listings, says more than 95,000 properties have been listed since 1966, covering more than 1.4 million individual resources.
The two statements do not match, and neither page gives an exact figure. The difference may reflect how listings and resources are counted or when each page was written, but the NPS pages do not explain it. The safest reading is that the Register holds roughly 100,000 listings, and anyone who needs an exact count should download the NPS dataset itself.
What makes a place eligible?
Eligibility rests on two ideas: significance and integrity.
Significance. In the NPS description, a property qualifies if it is associated with important events, activities or developments; with important people; with significant architectural, landscape or engineering history; or if it has the potential to yield information about history or prehistory, as in archaeology. These four kinds of significance are formally known as Criteria A through D under federal regulations.
Integrity. Significance is not enough on its own. Integrity is the ability of a place to convey its significance. NPS guidance recognizes seven aspects: location, design, setting, materials, workmanship, feeling and association. A grand house that has been stripped of its original features may fail the test, while a modest building that still looks as it did in its historic period can pass.
Age. Properties generally must be at least 50 years old. Newer places can be listed only if they are exceptionally important.
Who can nominate, and where does a nomination start?
Anyone with a stake can begin the process, but the paperwork usually runs through an official channel. According to the NPS:
- State Historic Preservation Offices (SHPOs) handle most nominations. Property owners, historical societies, preservation groups, government agencies and other individuals or groups can submit nominations to the SHPO, using official forms.
- Federal Preservation Officers handle properties that are owned or controlled by the federal government.
- Tribal Historic Preservation Officers handle property on tribal lands.
In practice, the NPS says, private individuals, organizations, local governments and tribes often start the process and prepare the documentation, even though the formal nomination comes from one of those offices. A volunteer group researching its town’s old train depot, for example, would typically work with the state office rather than send a file directly to Washington.
What are the steps from application to listing?
The NPS describes a sequence that moves from the state to the federal level.
| Step | What happens | Time stated by the NPS |
|---|---|---|
| 1. Start | Contact the SHPO (or the federal or tribal equivalent) | None given |
| 2. Nomination | Prepare and submit official forms | None given |
| 3. Notice | SHPO notifies affected owners and local governments and takes public comment | None given |
| 4. State review | The state review board and SHPO consider the nomination | Typically a minimum of 90 days |
| 5. Federal submission | The state sends the nomination, with certifying recommendations, to the NPS in Washington, D.C. | None given |
| 6. Decision | The Keeper of the National Register makes the listing decision | Within 45 days |
Putting the two stated periods together, a nomination that moves as quickly as the guidance describes would take at least about 135 days (90 plus 45), before counting the time spent preparing the documentation. That is illustrative arithmetic based on the stated minimum for the state stage and the stated limit for the federal stage. Many nominations take longer, and the NPS pages reviewed do not say how long they take on average.
Can an owner say no?
Yes, and this is one of the less understood features of the system. The NPS says that if the owner of a property objects, or a majority of owners in the case of a historic district, the property cannot be listed. The nomination may still be sent to the NPS for a Determination of Eligibility, which records that the property meets the criteria without placing it on the Register. The NPS page does not state a deadline for filing an objection.
That design reflects the voluntary nature of the program. A listing is not something the government imposes on a private owner against their will.
Does listing restrict what owners can do?
Generally not. The NPS says listing “places no restrictions on what a non-federal owner may do with their property.” An owner may, in general, repaint, renovate or even demolish a privately financed building without federal permission from the Register program.
There are two important qualifications, both noted by the NPS:
- Federal involvement. Restrictions can apply if a property is part of a project that receives federal assistance, such as funding, licensing or permitting. A highway project or a federally licensed development that would affect a listed property can trigger a review. The NPS page reviewed does not describe how that review works, so the details are outside the scope here.
- State and local law. State or local preservation laws may apply independently. A city’s historic district ordinance, for example, can require design review even where federal listing does not. The NPS recommends contacting the SHPO to find out what applies locally.
Because local rules vary so widely, the same federally listed building can face very different constraints in different towns. Local property tax rules matter here too, though they are a separate system from the one covered in how property taxes help fund local schools.
What does listing offer?
If listing does not regulate private owners, why seek it? The NPS says listing is “the first step towards eligibility” for federal preservation tax credits administered by the NPS and for NPS grant programs, such as Save America’s Treasures and Preserve America. The Register itself has no grant program of its own. The tax credit program is run by a separate NPS office, Technical Preservation Services, and some states run their own programs through their SHPOs.
The NPS pages reviewed do not give dollar amounts, credit percentages or eligibility rules for these programs, so owners should check current terms with the SHPO or the NPS before assuming a project qualifies. Beyond money, listing also carries a less tangible benefit: public recognition. A plaque, a documented history and an official designation can help a community make the case for a place, even where no legal protection follows.
How can you look up a listed property?
The NPS publishes a searchable table of listings with fields such as reference number, name, state, county, city, address, listing date and level of significance. The full dataset can be downloaded as a spreadsheet or CSV file, and the page was last updated on June 4, 2026, according to the NPS. A map is also available, though the NPS warns it may contain errors for complex historic districts.
For the underlying paperwork, the National Archives holds Register records through the end of 2012, searchable by reference number, name, state or keyword. The NPS says some files not held there are in its NPGallery, and listings since 2013 are being added. If a file is not online, the NPS says you can email the National Register office with the property name, state and reference number. Separate spreadsheets cover National Historic Landmarks and Multiple Property Documentation Forms, which cover groups of related properties. Federal determinations of eligibility are listed in a spreadsheet but have not yet been scanned.
Like the collections described in how public libraries work and are funded, these files are a public record that someone has to keep organized.
Why the Register matters even though it rarely says no
The National Register is best understood as a shared historical record with a few practical hooks. It names what a community has decided matters, it gives owners a route to preservation incentives, and it flags places so that federal projects take them into account. It does not freeze buildings in place, and it cannot override a private owner who declines a listing.
For readers, the practical point is that “historic” can mean several different things: a federal listing, a local district, a state designation or a landmark. Each carries different rules. The first question for any building is which of those labels actually applies, and the state historic preservation office is the place to ask.
This article is general information about how a federal program works, not legal, tax or financial advice. Rules and incentives change, so confirm current terms with the relevant state historic preservation office or the National Park Service.
Sources: National Park Service
