Square Footage FAQs

The condition of a home can directly impact the calculated square footage. In order for areas to be included in the total “finished” square footage, specific criteria must be met. These standards are outlined below:

Flooring:

• To qualify as a finished space, the entire floor area must have an acceptable, permanent finish. The following flooring types are required:
• Acceptable flooring includes: Tile, carpet, hardwood, laminate, vinyl or Luxury Vinyl Plank (LVP), painted, stained, or sealed concrete
• Unacceptable Flooring includes: Bare concrete, plywood subflooring, exposed underlayment (including adhesive residue or tack strips), partially finished flooring (e.g., some sections complete, others still subfloor), dirt or gravel floors.
• If any portion of the flooring is unfinished, the entire space is considered unfinished and does not count toward finished square footage.

Walls and Ceilings:

• Walls: Must be painted, wallpapered, stained, or otherwise sealed. Any surface that is still in its raw state, such as exposed wall studs, insulation, electrical wiring, or finished drywall is considered unfinished and disqualifies the area.
• Ceilings: Must also be complete and consistent with he homes finished spaces. Missing or damaged ceiling panels, exposed beams, or structural elements render the area unfinished. 
• No exposed materials: Any visible framing, insulation, or unsealed construction elements indicate the area is not suitable for year-round living and cannot b included int he finished square footage.

Connectivity of Finished Spaces:

• All finished areas must connect to other finished areas in a continuous, functional manner. If a finished space can only be accessed by passing through an unfinished area, it must be excluded from the finished square footage total. Examples of excluded spaces due to lack of connectivity:
  • • A finished bonus room above a garage that can only be accessed by passing through the unfinished garage is NOT included in the finished square footage.
    • A finished basement room that requires passage through an unfinished utility or storage area is NOT included in the finished square footage.
    • A converted attic space that requires access through an unfinished attic storage section is NOT included in the finished square footage.

• For an area to be included in the finished square footage of a home, it must have a permanent heating and cooling system that provides year-round climate control. This means the system must be permanently installed, function as part of the home’s infrastructure and capable of maintaining a comfortable temperature in all seasons.

  Acceptable Permanent Heating and Cooling Systems:

  • Central heating and cooling systems 
  • Ducted Furnace and Central Air Systems
  • Radiant Heating Systems: Built-in systems such as radiant floor heating or hot water baseboard heating that are permanently installed.
  • Mini-Split (Ductless) Systems

  Unacceptable (Non-Permanent) Heating & Cooling Systems:

   

  • Window Air Conditioning Units: These are removable and not integrated into the home’s HVAC system.
  • Ceiling Fans: These only circulate air and do not provide active heating or cooling.
  • Portable Space Heaters or AC Units: These are temporary solutions and not considered part of the home’s infrastructure.
  • Fireplaces and Wood Stoves: While they can provide heat, they are not considered primary, permanent HVAC systems.

Staircases and the space beneath them are included in ANSI Z765’s square footage calculation. However, whether they are classified as finished or unfinished depends on both the areas they connect and the stairs themselves.

For a staircase to be considered part of the finished square footage, it must:

• Connect two finished spaces.
• Be constructed with materials consistent with the finished areas of the home (e.g., proper treads, risers, and finishes).
• Meet ANSI criteria for a finished area, such as having walls, ceilings, and flooring that align with the rest of the finished living space.
• Have sufficient ceiling height in accordance with the minimum requirements set forth by the ANSI measurement standard.
• If the ceiling height at the bottom of a staircase is below 7 feet but meets the minimum obstruction height of 6’4″ per ANSI Z765, Rocket City Photo classifies it as an obstruction and includes it in finished square footage according to ANSI standards. However, appraisers and lenders may have their own interpretations, and final determinations are at their discretion.
• If a staircase does not meet a certain standard—it cannot be included in the finished square footage but may be counted as unfinished square footage.

• Attics are generally not included in certified measurements. 
• Attics are typically considered non-livable and do not impact the total finished square footage of the home.
• Even if an attic is measurable, its size does not contribute to the overall finished square footage unless it meets all criteria for a finished space.
• Not measuring an attic does not affect the finished square footage calculation because an unfinished attic is never included in the total. Measurements only apply when the space meets all ANSI requirements for a finished area.
• If an attic meets all ANSI Z765’s requirements, it is included in the finished square footage.

In accordance with ANSI Z765-2021 Section 3.6, a finished area must meet ceiling height requirements to be included in the total finished square footage calculation.

Standard Ceiling Height Requirements:

• The finished space must have a ceiling height of at least 7 feet.
• The ceiling height can be reduced to 6 feet 4 inches beneath beams, ducts, or other obstructions, but only in areas that are otherwise compliant with the standard 7-foot ceiling height requirement.

Sloped Ceiling Areas

• In spaces with sloped ceilings (e.g., attic conversions, lofted areas), at least 50% of the finished area must have a ceiling height of at least 7 feet.
• Any portion of the finished space with a ceiling height below 5 feet  is not included in the total finished square footage.

• Builder-reported square footage often does not follow ANSI Z765 standards, and may rely on plan-based estimations rather than precise, on-site measurements. Therefore, builder reported measurements cannot be directly compared to ANSI-compliant measurements. 

• Builders often calculate square footage before construction is complete and base measurements on architectural plans rather than actual, on-site measurements. These calculations do not account for post-construction variations, structural changes, or modifications during the building process.

• Builder reported square footage may include spaces that ANSI Z765 explicitly excludes, such as garages, patios, balconies or other areas that may not be fully finished.

• If any single element does not meet all ANSI Z765 requirements, the space is unfinished and does not count toward finished square footage.
• There are no exceptions to these criteria under ANSI Z765 standards.