Why does material vocabulary matter when buying a historic house?
A façade can combine stone, brick, wood, metal and other materials. Naming the component helps you ask the right inspection and repair question. A style label describes architectural character; it does not establish condition, construction throughout the house or legal use.
Building shape.
Cornice
- What to look for
- A projecting element at the top of a wall; brackets may support or visually articulate it.
- A district connection
- The Italianate rows and the Neo-Grec bracket details at 21-22–21-32.
Mansard
- What to look for
- A roof with a steep lower slope that can contain an upper story.
- A district connection
- The Second Empire pair at 21-53–21-55.
Dormer
- What to look for
- A window structure projecting from a sloping roof.
- A district connection
- The dormers recorded in the mansard pair.
Gable
- What to look for
- The triangular upper wall associated with a pitched roof.
- A district connection
- The wood-house group at 21-36–21-40.
Bay / bow front
- What to look for
- A projection from the main façade: angular bays and curved or shallow bow forms create different shapes.
- A district connection
- Compare 21-42–21-46 with the 23rd Street row.
Entrances and windows.
Stoop
- Plain-language meaning
- The exterior steps and landing leading to a raised entrance.
- A useful buyer question
- What is its repair history and what do the approved records show?
Balustrade
- Plain-language meaning
- A railing assembly with repeated upright supports beneath a rail.
- A useful buyer question
- Which material is present, and how are the components connected?
Areaway
- Plain-language meaning
- The exterior area between the building’s lower level and the sidewalk or retaining boundary.
- A useful buyer question
- How does it drain and how is access maintained?
Lintel
- Plain-language meaning
- The element spanning the top of an opening.
- A useful buyer question
- Is there evidence of cracking, movement or corrosion that needs investigation?
Sill
- Plain-language meaning
- The lower horizontal element at a window opening.
- A useful buyer question
- Does water shed away from the wall, and what repairs are present?
Sash / frame
- Plain-language meaning
- The window’s glazing-holding assembly and the surrounding fixed framework.
- A useful buyer question
- Which parts need repair, and is whole-window replacement actually necessary?
Sources: LPC · 1968 designation report, LP-0450 ↗ · LPC Permit Guidebook · Windows and Doors ↗
Materials and repair.
Westchester stone
- What it describes
- The designation report’s term for the paired stone-row fronts.
- Why the distinction matters
- Do not silently substitute a different geological or quarry identification.
Composition stone
- What it describes
- A manufactured stone material recorded for the stone-row balustrades and yard railings.
- Why the distinction matters
- The façade and railing can require different repair approaches.
Terra-cotta
- What it describes
- Fired-clay architectural material used in ornament and inserts.
- Why the distinction matters
- The 23rd Street details deserve material-specific assessment.
Repointing
- What it describes
- Replacing deteriorated mortar in masonry joints.
- Why the distinction matters
- Mortar compatibility, joint profile and the source of deterioration matter.
Flashing
- What it describes
- Material detailing that directs water away from vulnerable roof and wall junctions.
- Why the distinction matters
- A leak may arise at a junction rather than across an entire roof surface.
Clapboard
- What it describes
- Overlapping horizontal wood siding.
- Why the distinction matters
- LPC’s description of 21-34 emphasizes timber and clapboard details.
Sources: LPC · 1968 designation report, LP-0450 ↗ · LPC Permit Guidebook · Restoration ↗ · NPS Preservation Brief 2 · Repointing ↗
Related guides
Sources
- LPC · 1968 designation report, LP-0450 ↗Pages 1–3: boundary, hearing and history; pages 3–6: the historical building inventory.
- LPC Permit Guidebook · Windows and Doors ↗Window components, assessment and repair/replacement guidance.
- LPC Permit Guidebook · Restoration ↗Historic materials, masonry and architectural features.
- NPS Preservation Brief 2 · Repointing ↗Masonry-joint terminology and compatible repointing.