Architectural Artisans
- A studio crafting hand-carved architectural works in wood and marble for residential, commercial and historical interiors. This firm based in Valencia, California, works across the US.
- http://www.architecturalartisans.com/

Induni Conservation
- Bruce Induni offers consultancy in the UK on all aspects of historic stonework and mortar and teaches short courses on conservation. He describes his services, philosophy and experience.
- http://www.induni.net

Ned Kaufman PhD
- An independent practice offering a wide range of professional services in heritage conservation, based in New York City.
- http://www.kaufmanconservation.com

Bucks County TimberCraft Inc.
- Custom design contracting firm specializing in adaptive reuse of old barns into unique homes. Features portfolio, FAQs, news. Based in Carversville, PA.
- http://buckscountytimbercraft.com

Historic House Colors
- A nationwide consulting service that selects historically appropriate color schemes for homes and commercial building exteriors.
- http://www.historichousecolors.com/

Barn Histories
- Provides documentation of historic barns and outbuildings in the U.S. that includes condition reports, historical narratives, physical descriptions, architectural documentation, historic site plans, and State and National Register nominations.
- http://barnhistories.com

Historic Plaster Conservation Services Limited
- Strengthens existing fragile plaster in ceilings and walls in historic buildings.
- http://www.historicplaster.com/

J. Ballard Carpentry
- New England business specializing in historic preservation. Projects include historically-sensitive additions, historic barn restoration, and custom millwork and woodworking.
- http://www.jballardcarpentry.com/

Steven McQuillin & Associates: Building Preservation Consultants
- Consulting firm specializing in National Register nominations, tax credits, theatre restoration work, urban planning, local preservation laws, advocacy. Based in northeast Ohio, providing service throughout the U. S.
- http://www.mcquillinassociates.com

EHT Traceries, Inc
- A women-owned research and consulting firm specializing in architectural history and historic preservation, based in Washington, DC.
- http://www.traceries.com

Preservation Trades Company
- Provides planning, estimating, design and construction services for the restoration of historic buildings.
- http://www.preservationtradesco.com

Magnolia Restorations
- Residential restoration consultants dedicated to restoring fine homes to their original spirit.
- http://www.magnoliarestoration.com

Arbogast Paint Analysis
- Provides scientific analysis of historic finishes for the restoration of historic structures ranging from state capitol buildings to archaeological sites.
- http://www.paintanalysis.biz/

Historic Structures
- Master carpenter specializing in historic preservation, including plaster, millwork, and timber frame repairs.
- http://historicstructuresdc.com/

Heritage Restoration, Inc
- Historic Preservation construction company offering services such as framing, plaster, window repair and interior finish work.
- http://www.heritagerestoration.org/

Tutto Sesto
- Refurbishment of arches and vaulted roofs for houses, taverns, basements and churches. An Italian firm which works across the world.
- http://www.tuttosesto.it

ARS Progetti
- Ambiente Risorse e Sviluppo (Environment, Resources and Development) is a consulting firm working all over the world.
- http://www.arsprogetti.com

Architectural Restoration Technologies
- Provides consulting and analytical services, including materials analysis.
- http://www.art-crs.com/

Preservation Trades Network (PTN)
- Contractors and designers specializing in historic restoration. Includes information on trade shows and events.
- http://www.ptn.org/

Julie L. Sloan
- Stained glass consultants advise on stained glass conservation issues.
- http://www.jlsloan.com/

Sanrakshan Heritage Consultants
- A cultural heritage management firm in India specialising in the architectural conservation and management planning.
- http://www.sanrakshan.com

Office of Bauforschung
- A firm documenting and researching historical monuments in the Austrian Tyrol, as well as advising on and supervising restoration. Team, projects. In English, German and Italian.
- http://www.bauforschung-tirol.com

Paula S. Reed and Associates, Inc.
- Woman-owned business, based in Maryland, provides cultural resource evaluations, primarily in the northeastern United States. Photos and brief description of services.
- http://www.paulasreed.com/

Curatorial Resources and Research
- Provides scholarly research, lectures, tours, and instructional materials on modern art and architecture for organizations, film-makers, and museums.
- http://www.curatorialresources.com/

Hockley & Dawson
- Consulting engineers who specialise in the sensitive repair and conservation of historic buildings and structures. Portfolio includes projects throughout the United Kingdom.
- http://www.hockleyanddawson.co.uk/

Building Conservation Associates
- A private consulting and research firm practicing preservation design, conditions assessments, materials science, and historic building documentation. Projects are in the northeastern United States.
- http://www.bcausa.com/

Robert Silman Associates PC
- Structural engineers specialize in historic preservation, including large federal projects in the United States. Includes work on masonry, timber, and cast concrete structures.
- http://www.rsapc.com/

PreservationWeb
- Directory of product suppliers, contractors, and craftspeople who do preservation work.
- http://www.preservationweb.com/

Parasmoon
- This company in Iran offers preservation and restoration of historic buildings, objects, books and documents. Activities, portfolio, services, facilities.
- http://www.parasmoon.com/

General Engineering: Galileo Siscam Technology
- An Italian company based in Florence offering geophysical surveys for archaeology and civil engineering, monitoring of structure micro-shifts, databases, geographic information systems. Company profile, examples.
- http://www.gen-eng.florence.it/