# structure # structure The building itself: construction materials, condition, architectural style, and the structural elements the assessor recorded. Represents the physical building structure with detailed architectural and construction information including materials, conditions, styles, and structural elements. The question it answers ## What is this house, physically? The feature vector, taken from the source of record rather than from a listing agent. Assessor and parcel records are authoritative; listing fields are agent-entered, inconsistent between markets, and absent entirely for a property that was never listed. Other classes answering this question ## Why it matters Everything about the building that is not its shape or its rooms. Those are `lot` and `layout`; this class is what the building is made of and what condition it is in. The distinction matters because the three come from different parts of an assessor's record and are updated on different cycles. Merging them into one property record loses the ability to update the one that changed. ## In practice The class is wide because assessors record at that granularity: exterior wall material and its condition, primary and secondary, then roof, foundation, framing and finish, each carrying its own condition. Attachment type carries more than it appears to. Detached, semi-detached and attached distinguish a house from a duplex half from a townhouse, which is a different comparable set rather than a different adjustment on the same one. Sub-areas are the other field worth knowing. An assessor records areas separately — living area, garage, porch, unfinished space — each flagged for whether it is heated, which is what allows gross living area to be computed rather than taken on trust. ## Properties | Property | Type | Definition | | --- | --- | --- | | `source_http_request` | `object` | HTTP request configuration for retrieving this data. | | `request_identifier` | `string | null` | Identifier value that should be substituted into the source HTTP request to retrieve this specific data. | | `architectural_style_type` | `string | null` | Refers to the style, structure, and aesthetics of a building. `MidCenturyModern``Contemporary``Victorian``Ranch``Craftsman``Tudor``Minimalist``Colonial``Farmhouse` | | `attachment_type` | `string | null` | Indicates the structural relationship of the dwelling to other units. 'Attached' means the unit shares walls on both sides with adjacent dwellings (e.g., rowhouse or townhouse); 'SemiDetached' means it shares a wall with one other unit (e.g., duplex); 'Detached' means the unit stands alone with no shared walls. `Attached``SemiDetached``Detached` | | `exterior_wall_material_primary` | `string | null` | Primary material used for exterior wall cladding and structure. `Brick``Natural Stone``Manufactured Stone``Stucco``Vinyl Siding``Wood Siding``Fiber Cement Siding``Metal Siding``Concrete Block``EIFS``Log``Adobe``Precast Concrete``Curtain Wall` | | `exterior_wall_material_secondary` | `string | null` | Secondary material used for exterior wall accents or trim. `Brick Accent``Stone Accent``Wood Trim``Metal Trim``Stucco Accent``Vinyl Accent``Decorative Block` | | `exterior_wall_condition_primary` | `string | null` | Observed condition of the exterior wall materials. `New``Excellent``Good``Fair``Poor``Damaged` | | `exterior_wall_condition` | `string | null` | Observed condition of the exterior wall materials. `New``Excellent``Good``Fair``Poor``Damaged` | | `exterior_wall_insulation_type` | `string | null` | Type of insulation used in exterior wall cavities. `Fiberglass Batt``Blown Cellulose``Spray Foam``Rigid Foam Board``Reflective Barrier``Rock Wool``Natural Fiber``Unknown` | | `exterior_wall_insulation_type_primary` | `string | null` | Type of insulation used in exterior wall cavities. `Fiberglass Batt``Blown Cellulose``Spray Foam``Rigid Foam Board``Reflective Barrier``Rock Wool``Natural Fiber``Unknown` | | `exterior_wall_condition_secondary` | `string | null` | Observed condition of the exterior wall materials. `New``Excellent``Good``Fair``Poor``Damaged` | | `exterior_wall_insulation_type_secondary` | `string | null` | Type of insulation used in exterior wall cavities. `Fiberglass Batt``Blown Cellulose``Spray Foam``Rigid Foam Board``Reflective Barrier``Rock Wool``Natural Fiber``Unknown` | | `flooring_material_primary` | `string | null` | Primary flooring material covering floor surface. `Solid Hardwood``Engineered Hardwood``Laminate``Luxury Vinyl Plank``Sheet Vinyl``Ceramic Tile``Porcelain Tile``Natural Stone Tile``Carpet``Area Rugs``Polished Concrete``Bamboo``Cork``Linoleum``Terrazzo``Epoxy Coating` | | `flooring_material_secondary` | `string | null` | Secondary flooring material if multiple types are used in different areas. `Solid Hardwood``Engineered Hardwood``Laminate``Luxury Vinyl Plank``Ceramic Tile``Carpet``Area Rugs``Transition Strips` | | `subfloor_material` | `string | null` | Material used for subfloor structure beneath finish flooring. `Plywood``OSB``Concrete Slab``Engineered Wood``Particle Board``Unknown` | | `flooring_condition` | `string | null` | Overall condition of flooring materials and installation. `New``Excellent``Good``Fair``Poor``Damaged` | | `interior_wall_structure_material` | `string | null` | Structural material used for interior wall framing. `Wood Frame``Steel Frame``Concrete Block``Brick``Load Bearing``Non-Load Bearing` | | `interior_wall_structure_material_primary` | `string | null` | Structural material used for interior wall framing. `Wood Frame``Steel Frame``Concrete Block``Brick``Load Bearing``Non-Load Bearing` | | `interior_wall_structure_material_secondary` | `string | null` | Structural material used for interior wall framing. `Wood Frame``Steel Frame``Concrete Block``Brick``Load Bearing``Non-Load Bearing` | | `interior_wall_surface_material_primary` | `string | null` | Primary surface material covering interior walls throughout most of the structure. `Drywall``Plaster``Wood Paneling``Exposed Brick``Exposed Block``Wainscoting``Shiplap``Board and Batten``Tile``Stone Veneer``Metal Panels``Glass Panels``Concrete` | | `interior_wall_surface_material_secondary` | `string | null` | Secondary material used for interior wall accents, trim, or feature walls. `Wainscoting``Chair Rail``Crown Molding``Baseboards``Wood Trim``Stone Accent``Tile Accent``Metal Accent``Glass Insert``Decorative Panels``Feature Wall Material` | | `interior_wall_finish_primary` | `string | null` | Primary finish treatment applied over interior wall surfaces. `Paint``Primer and Paint``Textured Paint``Natural Finish``Stain``Clear Coat``Exposed Natural` | | `interior_wall_finish_secondary` | `string | null` | Secondary finish treatment for accent areas or decorative elements. `Wallpaper``Wall Decals``Decorative Plaster``Faux Finish``Fabric Wall Covering``Murals``Decorative Paint Technique` | | `interior_wall_condition` | `string | null` | Overall condition of interior wall surfaces and finishes. `New``Excellent``Good``Fair``Poor``Damaged` | | `roof_covering_material` | `string | null` | Material used for the primary roof covering. `3-Tab Asphalt Shingle``Architectural Asphalt Shingle``Metal Standing Seam``Metal Corrugated``Clay Tile``Concrete Tile``Natural Slate``Synthetic Slate``Wood Shake``Wood Shingle``TPO Membrane``EPDM Membrane``Modified Bitumen``Built-Up Roof``Green Roof System``Solar Integrated Tiles` | | `roof_underlayment_type` | `string | null` | Type of underlayment beneath roof covering. `Felt Paper``Synthetic Underlayment``Rubberized Asphalt``Unknown` | | `roof_structure_material` | `string | null` | Material used for roof structural support. `Wood Truss``Wood Rafter``Steel Truss``Concrete Beam``Engineered Lumber` | | `roof_design_type` | `string | null` | Architectural design of the roof structure. `Gable``Hip``Flat``Mansard``Gambrel``Shed``Saltbox``Butterfly``Bonnet``Clerestory``Dome``Barrel``Combination` | | `roof_condition` | `string | null` | Visible condition of the roof covering and structure. `New``Excellent``Good``Fair``Poor``Damaged``Leaking` | | `roof_age_years` | `integer | null` | Estimated age of the roof covering in years. | | `roof_date` | `string | null` | Date when the roof was built (format: YYYY, YYYY-MM, or YYYY-MM-DD) | | `gutters_material` | `string | null` | Material used for gutter system. `Aluminum``Vinyl``Steel``Copper``Galvanized Steel` | | `gutters_condition` | `string | null` | Condition of gutters and downspout system. `New``Good``Fair``Poor``Missing``Damaged` | | `number_of_stories` | `number | null` | Indicates the total number of above-ground stories (floors) in the structure. | | `roof_material_type` | `string | null` | Refers to the material a roof is made of. `Manufactured``EngineeredWood``Terazzo``Brick``Wood``CinderBlock``Concrete``Shingle``Composition``Linoleum``Stone``CeramicTile``Block``WoodSiding``ImpactGlass``Carpet``Marble``Vinyl``Tile``PouredConcrete``Metal``Glass``Laminate` | | `foundation_type` | `string | null` | Type of foundation system supporting the structure. `Slab on Grade``Crawl Space``Full Basement``Partial Basement``Pier and Beam``Basement with Walkout``Stem Wall` | | `foundation_material` | `string | null` | Primary material used in foundation construction. `Poured Concrete``Concrete Block``Stone``Brick``Treated Wood Posts``Steel Piers``Precast Concrete``Insulated Concrete Forms` | | `foundation_waterproofing` | `string | null` | Type of waterproofing system used on foundation. `Membrane``Coating``Drainage System``Unknown` | | `foundation_condition` | `string | null` | Visible condition of the foundation system. `Excellent``Good``Fair``Minor Cracks``Major Cracks``Settling``Water Damage``Unknown` | | `ceiling_structure_material` | `string | null` | Structural material supporting the ceiling. `Wood Joists``Steel Joists``Concrete``Exposed Beams``Truss System` | | `ceiling_surface_material` | `string | null` | Material used for ceiling surface finish. `Drywall``Plaster``Wood Planks``Acoustic Tile``Metal Panels``Suspended Grid``Coffered``Tray``Exposed Structure` | | `ceiling_insulation_type` | `string | null` | Type of insulation above ceiling. `Fiberglass Batt``Blown Insulation``Spray Foam``Rigid Board``Unknown` | | `ceiling_height_average` | `number | null` | Average ceiling height in feet. | | `ceiling_condition` | `string | null` | Overall condition of ceiling materials and structure. `New``Excellent``Good``Fair``Poor``Damaged` | | `exterior_door_material` | `string | null` | Material used for exterior door construction. `Solid Wood``Wood Composite``Steel``Fiberglass``Aluminum``Glass``Vinyl``Wrought Iron``Security Door` | | `interior_door_material` | `string | null` | Material and construction of interior doors. `Solid Wood``Hollow Core``Solid Core``Glass Panel``Metal``Composite``Molded``Bifold``Pocket Door``Barn Door` | | `window_frame_material` | `string | null` | Material used for window frame construction. `Vinyl``Wood``Aluminum``Fiberglass``Steel``Composite``Aluminum Clad Wood``Vinyl Clad Wood` | | `window_glazing_type` | `string | null` | Type and features of window glazing system. `Single Pane``Double Pane``Triple Pane``Low-E Coated``Tempered``Laminated``Impact Resistant``Argon Filled``Tinted``Smart Glass` | | `window_operation_type` | `string | null` | Operational mechanism and style of windows. `Double Hung``Single Hung``Casement``Sliding``Awning``Picture``Bay``Bow``Garden``Skylights``Jalousie``Fixed` | | `window_screen_material` | `string | null` | Material used for window screens. `Aluminum``Fiberglass``Pet Screen``Solar Screen` | | `primary_framing_material` | `string | null` | Primary material used for structural framing system. `Wood Frame``Steel Frame``Concrete Block``Poured Concrete``Masonry``Engineered Lumber``Post and Beam``Log Construction` | | `secondary_framing_material` | `string | null` | Secondary structural materials for support beams and lintels. `Steel Beams``Engineered Lumber``Concrete Lintels``Wood Beams` | | `structural_damage_indicators` | `string | null` | Observable indicators of structural damage or issues. `Foundation Cracks``Wall Cracks``Ceiling Cracks``Sagging Floors``Sagging Roof``Door/Window Misalignment``Water Damage``Termite Damage``Settlement Issues``None Observed` | | `finished_base_area` | `integer | null` | Finished ground-level base area (first-floor footprint) in square feet. | | `unfinished_base_area` | `integer | null` | Unfinished ground-level base area in square feet. | | `finished_basement_area` | `integer | null` | Finished basement area in square feet. | | `unfinished_basement_area` | `integer | null` | Unfinished basement area in square feet. | | `finished_upper_story_area` | `integer | null` | Finished upper story area (above the ground floor) in square feet. | | `unfinished_upper_story_area` | `integer | null` | Unfinished upper story or attic/loft space in square feet. | ## Provenance and coverage A record of this class is validated against the same definition whatever jurisdiction it came from, which is what makes two counties comparable without a per-county adapter. A jurisdiction appears below only where a committed configuration serves this class's surface. - Lee, Florida - Palm Beach, Florida - Miami-Dade, Florida - Orange, Florida - Santa Clara, California How a new jurisdiction is brought online