An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock
( )
or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Many architectural and realty professionals contribute to preservation projects. Each needs and uses different tools in his or her work. The Center for Historic Buildings supports these professionals by:
The center also works with Regional Historic Preservation Officers and technical staff in each of GSA’s eleven regions to provide day-to-day consultation support to ensure projects and actions comply with the NHPA and are consistent with GSA policy and national stewardship strategy.
This section of the Historic Preservation website centralizes the most commonly used tools and resources.
GSA offers a number of convenient tools for managing GSA’s historic properties.
Historic Building Database
Foremost among these tools is Historic Buildings Database, the data for which is presented to GSA associates via our website, which can be used to generate individual building profiles and other reports.
The website includes GSA’s historic building list, locations, statements of significance, and photographs (see Explore Historic Buildings, Find a Building).
Find hundreds of references and specifications for rehabilitating, repairing and maintaining historic buildings, landscapes and structures. The information found here addresses a wide variety of issues, materials and features, such as:
Error, The Per Diem API is not responding. Please try again later.
No results could be found for the location you've entered.
Rates for Alaska, Hawaii, and U.S. territories and possessions are set by the Department of Defense.
Rates for foreign countries are set by the Department of State.
Rates are available between 10/1/2022 and 09/30/2025.
The End Date of your trip can not occur before the Start Date.
Traveler reimbursement is based on the location of the work activities and not the accommodations, unless lodging is not available at the work activity, then the agency may authorize the rate where lodging is obtained.
Unless otherwise specified, the per diem locality is defined as "all locations within, or entirely surrounded by, the corporate limits of the key city, including independent entities located within those boundaries."
Per diem localities with county definitions shall include"all locations within, or entirely surrounded by, the corporate limits of the key city as well as the boundaries of the listed counties, including independent entities located within the boundaries of the key city and the listed counties (unless otherwise listed separately)."
When a military installation or Government - related facility(whether or not specifically named) is located partially within more than one city or county boundary, the applicable per diem rate for the entire installation or facility is the higher of the rates which apply to the cities and / or counties, even though part(s) of such activities may be located outside the defined per diem locality.
U.S. General Services Administration