Interpreting the Standards Bulletins

Interpreting the Standards Bulletins explain rehabilitation project decisions made by the National Park Service in its administration of the Historic Preservation Tax Incentives program.

ITS Bulletins assist building owners in applying the Standards to rehabilitation projects.

Each Bulletin references the relevant standards. The bulletins are case-specific and are provided as guidance only; they are not necessarily applicable beyond the unique facts and circumstances of each case.

  1. Interior Plan: Changes to Shotgun Interior Plan
  2. Garage Door Openings: New Infill for Historic Garage Openings
  3. New Additions: New Additions to Mid-Size Historic Buildings
  4. Exterior Doors: Inappropriate Replacement Doors
  5. Exposed Interior Brick: Removing Interior Plaster to Expose Brick
  6. Significant Spaces: Preserving Historic Church Interiors
  7. Interior Finishes: Painting Previously Unpainted Woodwork
  8. Interior Alterations: Interior Alterations to Detached Residences to Accommodate New Functions
  9. Porches: Inappropriate Porch Alterations
  10. Stair Tower Additions: Exterior Stair/Elevator Tower Additions
  11. School Buildings: Interior Alterations to School Buildings to Accommodate New Uses
  12. School Buildings: Rehabilitation and Adaptive Reuse of Schools
  13. Storefronts: Repair/Replacement of Missing or Altered Storefronts
  14. Adding New Openings: New Openings in Secondary Elevations or Introducing New Windows in Blank Walls
  15. Industrial Interiors: Treatment of Interiors in Industrial Buildings
  16. Loading Door Openings: New Infill for Historic Loading Door Openings
  17. Interior Parking: Adding Parking to the Interior of Historic Buildings
  18. New Additions: New Additions to Mid Size Historic Buildings
  19. Interior Finishes: Deteriorated Plaster Finishes
  20. School Buildings: Converting Historic School Buildings for Residential Use
  21. Adding New Openings: Adding New Openings on Secondary Elevations
  22. Adding New Openings: Adding New Entrances to Historic Buildings
  23. Windows: Selecting New Windows to Replace Non-Historic Windows
  24. Corridors: Installing New Systems in Historic Corridors
  25. Interior Finishes: Altering the Character of Historically Finished Interiors
  26. Entrances and Doors: Entrance Treatments
  27. Awnings: Adding Awnings to Historic Storefronts and Entrances
  28. Corridors: Corridors in Historic Highrise Apartment Buildings and Hotels
  29. Garage Doors: Adding Vehicular Entrances and Garage Doors to Historic Buildings
  30. New Entries: New Entries on Mill Buildings
  31. Interior Features: Retaining Distinctive Corridor Features
  32. Roofing Materials: Slate Roof Treatments
  33. Secondary Elevations: Alterations to Rear Elevations
  34. Additions: Completing Never-Built Portions of a Historic Building
  35. Interior Plans: Changes to Shotgun Interior Plan
  36. Rooftop Additions
  37. Rear Additions: Rear Additions to Historic Houses
  38. Alterations Without Historical Basis
  39. Site and Setting: Changes to Historic Site
  40. Corridors: Corridors in Historic School Buildings
  41. Incompatible Alterations to the Setting and Environment of a Historic Property
  42. Industrial Bridges in Mill Complexes
  43. Converting Fire Escapes to Balconies in Mill Complexes
  44. Subdividing Significant Historic Interior Spaces
  45. Adding or Modifying Fly Lofts on Historic Theaters
  46. Modifying Historic Interior Railings to Meet Building Code
  47. Rooftop Additions on Mid-Size Historic Buildings
  48. Replacement of Missing or Altered Storefronts
  49. Designing Compatible Replacement Storefronts
  50. Reusing Special Use Structures
  51. Installing New Systems in Historic Buildings
  52. Incorporating Solar Panels in a Rehabilitation Project
  53. Designing New Additions to Provide Accessibility
  54. Installing Green Roofs on Historic Buildings
  55. Retaining Industrial Character in Historic Buildings
  56. Alterations Without Historical Basis