- A.J. Martini, Inc.
 - Specialising in new construction, renovation/build-outs, and historic preservation. Serving the Northeast. - Chandler, Master Builder Inc.
- Specialises in restoration and preservation of early homes and other historic structures.
 Fairhaven of Anglesey Abbey Ltd.
- Traditional craftsmen combining masonry, stone carving, sculpture, and conservation in an integrated approach to building preservation.- Fredrick & Emily's Church Restoration
- Specialises in repairing and refinishing church pews, altar furniture, floors, ceilings, and trim work.
- Joseph Gnazzo Company, Inc
- Building restoration, maintenance, and waterproofing speciality contractor.
- Kellaher Diversified, Inc.
- Working in the field of historic and ecclesiastical renovation.
- Midwest Maintenance, Inc.
- Full service contractor specialising in building preservation.
- Original Features
- Supplies and installs Victorian and Edwardian tiled floors, fireplaces, joinery, stained glass, and fibrous plaster.
- Period Property Preservation Ltd
- Restores historic and listed buildings.
- Pioneer Refinishing
- Specialising in stripping, refinishing, reupholstering, and restoration of church pews.
- Restoration Works, Inc.
- Specialising in historic window preservation.
- Studios of Potente, The
- Offers church, synagogue and columbaria interior design, consultation, construction, renovation, and restoration.
- U.S. Heritage Group
- Offers historical mortar matching services, broad scope restoration consulting, and publications on applications and techniques.
- Walsh Construction Company, Inc.
- General contractor specialising in historic renovations and roof replacement, including Federal museums, memorials, office buildings, libraries, and more.
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