United States directory

National preservation organizations, period hardware and materials makers, and regional craft stubs. Official orgs include live links; fictional vendor names are marked SAMPLE.

• National Park Service — Technical Preservation Services

  SAMPLE

  Federal · Secretary of the Interior Standards · Free guidance

  Official home of the Secretary of the Interior’s Standards for the Treatment of Historic Properties, Preservation Briefs, and technical notes used nationwide (including Mills Act work).

  StandardsFreeOfficial
  nps.gov — Standards ↗

• National Trust for Historic Preservation

  SAMPLE

  National nonprofit · Advocacy · Education

  National advocacy, Saving Places resources, and owner-facing articles on rehabilitation tax credits, local designation, and sensitive updates to historic homes.

  NonprofitEducation
  savingplaces.org ↗

• Advisory Council on Historic Preservation (ACHP)

  SAMPLE

  Federal · Section 106 · Policy

  Independent federal agency that advises on historic preservation policy and Section 106 review. Useful context when federal funding or permits touch a project.

  PolicyOfficial
  achp.gov ↗

• Period Hardware Supply Co. (placeholder)

  SAMPLE

  Nationwide shipping · Doorknobs · Latches · Escutcheons

  Fictional placeholder name. Stands in for U.S. makers and dealers of solid brass and iron hardware suited to 1920s Spanish and Mediterranean Revival interiors. Replace with a verified supplier.

  HardwareMaterials

  Replace with a named, vetted vendor.

• Southwest Clay & Roof Tile Brokers (placeholder)

  SAMPLE

  Southwest / West · Barrel & Mission tile · New & salvage

  Fictional placeholder name. Category stub for brokers who source Spanish- and Mission-style clay roof tile across the western U.S. Confirm stock, matching, and freight before specifying.

  RoofingTile

  Replace after site visits or referrals.

• Steel Casement Window Works (placeholder)

  SAMPLE

  Repair · Replication · Weatherstripping

  Fictional placeholder name. Stub for shops that restore or replicate Spanish Revival steel casements instead of forcing vinyl replacements — common need in historic districts nationwide.

  WindowsCraft

  Add regional fabricators you trust.

• Lime Plaster & Traditional Stucco Network (placeholder)

  SAMPLE

  Breathable finishes · Moisture-aware repairs

  Fictional placeholder name. Stands in for craftspeople experienced with lime plaster and traditional stucco on early-20th-century masonry and wood-frame walls.

  PlasterStucco

  Verify licensing and references locally.

• Association for Preservation Technology International (APT)

  SAMPLE

  Professional network · Technical publications

  Membership organization for preservationists, architects, and craftspeople — conferences, bulletins, and practice notes on materials and interventions.

  ProfessionalEducation
  apti.org ↗

• Historic Tax Credit consultants (placeholder roster)

  SAMPLE

  Federal & state credits · Part 1–3 applications

  Placeholder category. Many U.S. projects use federal Historic Rehabilitation Tax Credits. This stub stands in for a curated list of consultants familiar with NPS review — interview before engaging.

  Tax creditsConsulting

  Add firms after interviews; confirm state SHPO coordination.

• State Historic Preservation Offices (SHPO directory)

  SAMPLE

  Statewide · National Register · Tax credits

  Each state maintains a SHPO that reviews National Register nominations, tax credit applications, and local program coordination. Start with your state’s official site via NPS listings.

  SHPOOfficial
  NPS — SHPO list ↗