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The U.S. Secretary of the Interior defines historic preservation as "retention of all historic fabric through conservation, maintenance, and repair." This category also includes resources for the related practice of rehabilitation, which includes replacement of severely deteriorated elements of the structure. This category is for architects, planners, craftspeople, and materials manufacturers whose primary speciality is historic preservation and rehabilitation and who routinely serve a national, international, or broadly regional clientele.
This category is for architects, planners, craftspeople, and materials manufacturers whose primary speciality is historic preservation and rehabilitation and who routinely serve a national, international, or broadly regional clientele. Note that there are subcategories for specific types of trades.

If your business does most of its work within a limited region (such as a city and its suburbs), please submit it to the locality of its main office under Regional. Businesses that provide no indication of their service area, or that show only one or two projects at locations near their office, will be sent to the locality of their main office.

If historic preservation is one of many specialities for your business, please go to Business: Construction_and_Maintenance and find a category that reflects your full range of services.

If your site is in a language other than English, start in World to find a category in the appropriate language.

Architects specializing in historic preservation.
This category is for architects who make historic preservation their primary area of business and who routinely serve an international, national, or broad regional market. Information critical to evaluating qualifications must be in English.

If the firm serves a single county or metropolitan area, or only a portion of a state or province, please go to Regional and submit the site to the locality where the firm''s main office is located.

If historic preservation is one among many specialities offered by the firm, please go to Business: Construction and Maintenance: Design, find the appropriate subcategory, and submit to the appropriate subcategory there.

If the site is primarily in a language other than English, please go to World, find the appropriate language, and seek out an appropriate category based on the two guidelines above.

The intent of this category is to locate individuals or firms who provide on-site services specific to the historic preservation trades across a broad regional or national area.
This category is for individuals and firms whose primary business is providing on-site historic preservation services across a broad regional, national, or international area.

If your company primarily serves its local area and surrounding areas, please submit it to Regional in the locality of its main office.

If your company is multi-disciplined and provides on-site historic restoration services as one among many on-site contracting services, please submit it to Business: Construction and Maintenance: Commercial Contractors in the most appropriate subcategory.

If your site is in a language other than English, find the appropriate language under World and submit to the most appropriate subcategory under that language.

Limited to suppliers specific to historic preservation, or of relevance to the historic preservation industry, and not listed elswhere under other construction related categories on ODP.
If your website does not lead to specific historic preservation related content within two clicks, then please do not submit your URL here.