ANSI Z765 Square Footage: Method for Calculating

Home , Basement, Dumbwaiter, Stairs, Utility room

2020 UPDATE

ANSI Z765-2020: Square Footage – Method for Calculating ANSI Standard Revision Process

Public Comment Draft

February 7, 2020

This draft is provided for the purpose of soliciting public comments on the changes to the 2020 ANSI Z765 Standard. Only the changes to the 2003 (R2013) Standard (shown in underline and strikethrough) are open for public comment. Any comments on any other provisions of the Standard that have not changed from the 2003 Standard will not be accepted as part of the 2020 revision cycle, they will be addressed in the next revision cycle.

Public comments are accepted through March 23, 2020 via a web-based form at https://www.homeinnovation.com/z765.

The Draft Standard shows all changes in underline / strikethrough format. The existing language that has not been changed is shown only for the purpose of providing context for review of the changes.

The final draft of the revised Standard will be editorially reviewed for spelling, grammar, and format after all substantive changes have been approved by the Consensus Committee.

SQUARE FOOTAGE– METHOD FOR CALCULATING: ANSI Z765-2020 AMERICAN NATIONAL STANDARD FOR SINGLE-FAMILY RESIDENTIAL BUILDINGS 2/7/2020 DRAFT

AMERICAN NATIONAL STANDARDS INSTITUTE, INC. HOME INNOVATION RESEARCH LABS CONTENTS

STANDARD 1. Scope and Purpose ...... 1

2. Definitions ...... 1

3. Calculation of Square Footage ...... 2

4. Statement of Finished Square Footage ...... 3

ANNEX Commentary on ANSI Z765 ...... 4

FIGURES Figure 1. Entry-Level Plan ...... 6

Figure 2. Upper-Level Plan ...... 7

Figure 3. Basement Plan ...... 8

Figure 4. Building Section ...... 9

Figure 5. Building Section ...... 10

Figure 6. Stairs ...... 11

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SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020 i

4, - -

at the request of the Home family houses and condominiums - —

meaning that it not is intended to be – Information in the Annex is intended to comment on and illustrate the use of the Standard; however, the Annex is not considered part of the Standard. square footagesquare in detached and attached single family houses. committee The held its first meeting on November 22, 1994. ANSI procedures require periodic to review ensure standards current are and relevant. In 2003, the Section to changes approved committee consensus which consisted of an editorial reorganization of its provisions and the addition of a subsection specifying reporting requirements calculation for results using produced other measurement methods. changesThe to the Annex consisted of: The (1) addition of a description of decorative finishes for concrete floors, along with recognition of this of type concrete floor as a type of floor finish; and The (2) addition of text acknowledging that the Standard does not address differences between calculations made by multiple parties for the same property. In 2011, a consensus considered committee changes to the 2003of ANSI Z765. edition The consensus committee reaffirmed the 2003 edition. This Standard has an Annex section, which is non normative enforced along with the body of the Standard. applies to single that in the program enroll and when only a numeric forvalue floor area is used in advertising and sales materials, in an agreement of purchase and sale, in a construction contract, whenever or the size of the house is stated materials.in printed the Over years, groupsother developedhave conventionstheir own squarefor footage calculation within their organizations. In 1994, April the National Association of Home Builders (NAHB) Builders Association of Greater New Orleans and builderother members commissioned the NAHB Research Center (a wholly owned subsidiary of renamedNAHB; InnovationHome Research Labs as of February 12, 2013) to actas secretariat an for ANSI Accredited Standards Committee and to assemble of organization a group representatives and individuals materially and affecteddirectly by the development of an forANS the measurement of ORD IS NOT PART OF AMERICAN NATIONAL STANDARD) - on

family -

unit residential - Unit Unit Residential -

. FOREWORD (THIS FOREW Multi family houses style of any or - 2010) - Standard Method Measuringfor grade square footage in single -

and below

- . BOMAAdditionally, issued footagea square

The OntarioThe New WarrantyHome Program issued Builder Bulletin 22No. Floor CalculationsArea November 15, 1989. bulletin’s The set of requirements uniform for floor area calculation Floor Area Floor in Office Buildings, ANSI/BOMA Z65.1 2010 measurement methodology for multi buildings in 2010 titled, Buildings: Standard Methods of Measurement (ANSI/BOMA Z65.4 commercial buildings has been in effect 80 for years. In 1915, the Building Owners and Managers Association International (BOMA) developed a standard method measuringfor area floor in office buildings. BOMA The Standard was in 1952, revised 1955, 1971, 1980, 1989, 1996, and 2010, and bearsnow the title dimensions. Before the original adoption of this Standard in 1996, no national standard existed in the United States measuringfor square footage in single houses. contrast, By a standard applicable to The StandardThe must be applied as a The whole. Standard is not meant to supersede replace or any otherwise or legal required existing area measurement method. It may be used in proposed, new, or existing single construction but is not toapplicable apartment/ multifamily buildings. It does not cover room agreement than rather a point of contention between withgroups different interests and concerns. This Standard the for calculation and reporting of above family houses is offered for voluntary application. A standardA allows individuals and organizations that use different terminologies based on different points toof view communicate, cooperate, and calculate quantities on a common basis. This Standard promotes these goals in the thathope square footage calculation can become an item of consumers. American The National Standards Institute is the (ANSI) central body responsible for identifying a single, consistent set of voluntary standards and thatverifying the principles of openness and due process heeded. are Every ANS is subject reviewto periodic and revision. An AmericanAn National Standard (ANS) is developed through a consensus process that those involves organizations and individuals anddirectly materially affected by theexistence of a standard. standard A itself isguide a voluntary for producers and ii

SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020 Thomas M. Kenney, P.E.,Secretariat Kenney, M. Thomas Chair Foley, M. Wayne column. right the in listed followingmembers the of consisted Z765 Committee the standard, this approved it time Atthe approval. its votedfor members all committee that necessarilyimply not does standard the approval of Committee Z765. SquareFootage, on Residential Committee Standards to Accredited the by ANSI for submittal approved and processed was standard This www.HomeInnovation.com 301.430.6180 F: P:301.249.4000 20774 Maryland Marlboro, Upper Boulevard Prince George’s 400 Labs Research Home Innovation secretariat: the to forwarded be should and are welcome standard of the for improvement Suggestions

- 8731 – Home Innovation Research Labs Research Innovation Home

SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020 1

of ft.

family houses. -

FAMILY RESIDENTIAL BUILDINGS -

Purpose

finished surface of a house. 2.5 Level Areas of thehouse that vertically are within 2 the same horizontal plane. 2.6 Square Footage areaAn of a house that isand calculatedmeasured in accordance with the standard. When employing orMetric Standard International measurement (SI) units, is thearea term used floor in of squareplace footage. 2.7 Unfinished Area Sections of a house that do not meet the of criteria finished area 1.2 It is of this the purpose standard to describe a method of measurement that makewill it possible to obtain accurate and reproducible measurements of footagesquare in single 2.4 Grade groundThe level at the perimeter of the exterior -

family -

METHOD FOR CALCULATING: FOR METHOD

, embodying walls, –

AMERICAN NATIONAL STANDARD FOR SINGLE

Family House - Family House 20XX - -

based its upon location

Scope

SQUARE FOOTAGE SQUARE Z765 ANSI and vehicles.other round useround floors, and ceilings that similar are to the rest of the house. 2.3 Garage structureA intended for the storage of automobiles as a townhouse, rowhouse, or duplex, example.for 2.1 Detached Single houseA that has space open on all its sides. 2.2 Finished Area enclosedAn in a area house thatsuitable is year for 2. DEFINITIONS 2. 2.1 Attached Single houseA that has its and foundation,roof own is separated from housesother by dividing walls that extend from roof to foundation, and does not share utility services with adjoining houses; may be known 1.1 This standard describes the procedures to be followed in measuring and calculating the square footage of detached and attached single houses. 1. PURPOSE AND SCOPE 2 SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020

the areas. the between partition interior ofany surface unfinished oredge exterior the to measuring by calculated is square footage level, finished the same the on areareas adjacent unfinished and Where finished Areas Unfinished to Adjacent Areas Finished 3.3 appropriate. where houses, between centerlines the from wallor outside of the surface finished exterior the to floor at level measured level on that areas finished of the sum the is level ofeach square footage single Forattached Single Attached 3.2 walls. outside ofthe surface exteriorfinished floor the to at level level measured on that areas of finished sum the is level ofeach square footage single For detached 3.2 calculation. of the result the when reporting such as identified be must circumstances under such developed of square footage area.Calculation calculated the is as inaccuracy, to susceptible be can plans or measurement direct otherthan means some developed through dimensions Building available. time exteriorthe in of the measurement physical direct preclude may obstacles or other structure, terrain, ofthe nature the and available be not may interior the to Access possible. not is structure of a measurement when direct exist can Circumstances calculation. of the result the when reporting such as stated be must plans using by made house proposed fora square footage of Calculation calculation. of the result reportingthe suchwhen as be stated must allowed but is spaces interior the of inspection an without but dimensions exterior using by made footage square of Calculation Methods Calculation 3.1 meter. square 0.1 nearest the to reported area floor is final the meter; 0.01 nearest the to measured is house the units, measurement (SI) International Standard Metric or using When foot. square whole nearest the to reported is square final footage the foot; of a tenth or inch nearest the to measured is house the units, measurement English using When houses. family single in footage square quantifying when employed be must calculation and of measurement methods following the standard, this to adherence To claim 3. CALCULATION OF SQUARE FOOTAGE SINGLE FOR STANDARD NATIONAL AMERICAN

DetachedSingle

- - family houses, the finished finished the houses, family - family houses, the finished finished the houses, family - Family Finished Square Footage Square Finished Family FamilyFinished Square Footag

- FAMILY RESIDENTIAL BUILDINGS RESIDENTIAL FAMILY

e -

height of at least 7 ft. (2.13 m) except under beams, under beams, ft. (2.13 except m) 7 least of at height ceiling have a must areas finished calculations, footage square finished in included To be Requirements Ceiling Height 3.6 belowgrade. partly or are wholly that on levels areas of finished sum the is house ofa square footage below The grade. above entirely are that on levels areas of finished sum the is The above Above 3.5 floor. the in opening areathe of exceedthe to not descend, stairs the which from floor areathe of finished the in included belowis floor the to proceeding landings and treads stair both area of the However, calculation. square footage the in included be cannot floor the below to Openings Below Floor the to Openings 3.4 footage. square of calculation the in included be cannot level same on the floor have a not do and walls outside ofthe surface finished exterior beyondthe protrude that areas otherfinished and windows, Chimneys, footage. square finished of calculation the in included be cannot areas unfinished and Garages Protrusions and UnfinishedAreas, Garages, 3.8 level. ofany square footage finished the in included be mannercannot a such in house the to connected are not that areas Finished level. at same the is that floor ofthe square footage finished the in included are stairways or hallways as such areas other byfinished house of the body main the to are connected that areas Finished House the to Connected Areas Finished 3.7 square footage. finished in included be may m) ft. (1.52 5 than less heightof a has that area finished the of no portion havea vertical ceilingheight of atleast 7ft. (2.13 m); room must that in square footage finished of the one least at sloped, is ceiling room’s a If sloped. is ceiling or the where requirement; height specified no is where there under(1.93 stairs m); in. 4 ft. 6 be may where height otherobstructions the and ducts,

- -

grade finished square footage of a house house of a footage square grade finished and Below and

- Grade Finished Areas Finished Grade

- grade finished grade finished

- half half

SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020 3

FAMILY RESIDENTIAL BUILDINGS - 3 2

Based Method -

DECLARATION “Finished square footage calculations this for house were made based on estimated dimensions and mayonly include unfinished openingsareas, or in notfloors associated with stairs, openings in floorsor exceeding the of associatedarea stairs.” DECLARATION “Finished square footage calculations this for house were made based on dimensionsplan and mayonly vary from the finished square footage of the house as built.” physical measurement of the in theexterior time available. Building dimensions throughdeveloped some means thanother direct measurement or plans can be susceptible to inaccuracy, as is the calculated Calculationsarea. underdeveloped such circumstance must declaration similarinclude a to the following: 4.5 Plans If the calculation of finished footagesquare is made from the plans of a proposed house, the Statement of Finished Square Footage must include a declaration similar to the following: 4.6 Other Methods Circumstances can exist when direct measurement of a structure is not possible. Access to the interior may not be available and the nature of the terrain, structure, other or obstacles may preclude direct

are – grade - grade -

grade areas - . Any . Any if calculated by

Grade Areas Square Footage -

AMERICAN NATIONAL STANDARD FOR SINGLE and Below

- grade areas and below do not meet the of criteria -

voids any claim of adherence to 1 –

grade areas. -

areas, openings in floors not associated with stairs, openings or in exceedingfloors the of associatedarea stairs.” DECLARATION “Finished square footage calculations this for house were made based on measured dimensions and mayonly include unfinished

must include a declaration similar to the following: 4.4 Interior Spaces Not Inspected Method If the calculation of finished footagesquare is made without an inspection of interior spaces to confirm finished areas, unfinished areas, openings or in the the Statementfloor, of Finished FootageSquare included in the Statement of Finished Square Footage but may be listed separately the methods described in this standard calculation and statement of unfinished square footage must distinguish above between and below 4.3 Areas Not Considered Finished Finished areas that calculated footage square such as those areas not connected to the house, unfinished areas, and areasother that do not fulfill the requirements of finished square footage prescribed cannotabove be area isarea reported to the nearest meter. square 0.1 4.2 Reporting of Above No statement of a house’s footage square finished can be made without the and clear separate distinction of above areas. 4.1 Rounding finishedThe square footage of a house is to be toreported the nearest whole square foot abovefor grade finished square footage and below for finished square footage. When using SI units, floor 4. STATEMENT OF FINISHED SQUARE FOOTAGE SQUARE FINISHED OF STATEMENT 4. Failure to the provide declarations listed below where applicable this standard. 4 SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020

no calculatedabove dependingon topography, design,or gradeline acknowledges that this may result in houses that distinction and the definitionof grade, the committee distinction. Given the above can be madewithout that clearand separate footage; no statementof a house’s square footage above This standard makesa cleardelineation between ventilation. and forlight requirement any to conform standard this in area of finished The definition sources. ventilation and light or of natural mechanical amount specified a requirements one of its as has that space room aor to describe codes building established by used often is space habitable The term standard. this in described as surfaces finished exterior between ratherthan surfaces finished interior between measured typically are dimensions Room houses. single within of rooms cover dimensions the to or designed intended are not standard this in forth put calculation and of measurement The methods housing. of consumers and producers of (instead square term the use to chose The committee law. state archiving with charged body state the from obtained be can ownership of condominium definitions Legal basis. individual on an resolved be must unit condominium areaa of the calculate law to prescribedstate bymethods and standard the in out set as square footage finished for calculating method the between Differences law. of state violation single attached single detached to applied if house of the ownership of definition legal appropriate the confirm to are cautioned standard of the Practitioners townhouses, rowhouses, and other side detached and attached single buildings, but it may be employed to measure all to the measurement of apartment/multifamily This standard is not designed for and cannot be applied Standard. of the part considered not is Annex however,the Standard; ofthe use the illustrate on and comment to intended is Annex the in Information Standard. of the body the with along enforced be to intended non is Annex This on ANSICommentary Z765 (INFORMATIVE) ANNEX

- grade squarefootage and below

floor

- — family condominium units to avoid to units condominium family area) because of its common use by use common ofits because area) does not imply that finished spaces spaces finished imply not that does - normative, meaning that it is not not is it that meaning normative, - gradefinished square footage

- grade and below - family houses, including

- - by grade square —

as employed employed as - side houses. - family or or family

- - family grade footage footage — have —

modify the texture or appearance of the slab. ofthe appearance or texture the modify scoring, concrete, colorationthe integral of staining, chemical as methods such by produced slab of the components are long finishes Decorative but donot includebare flooring, and concrete floorswith decorative finishes are notlimited to carpeting,vinyl sheeting,hardwood board,and wood paneling. Floor finishes include but painted gypsum wall board,wallpaper Wall and ceiling finishes include but arenot limited to typically considered above alternativelydescribed as atgrade or on gradeare misinterpretation ormisapplication. Houses thatare areawhile minimizing the likelihood of from the committee’s intent toquantify a house’s by this standard.This possible consequence arises derived from the method ofmeasurement employed Finished Square Footage but may be listed listed be may but Footage Square Finished of Statement the in included be cannot occupancy for year suitable or enclosed not not are andthat areas similar decks, balconies, Porches, a wood studor other framingmember. of thepartition closest to theunfinished area ratedwall), the measurement is made to theportion finished area from an unfinishedarea (oftennot a fire sideof thepartition. For apartition that separatesa to the surfaceof the gypsumwall boardon thegarage (usually afire Forpartitions betweena finishedarea and agarage surface of any interiorpartition between the areas. by measuring to theexterior edge or unfinished the samelevel, finished square footageis calculated Where finished and unfinished areas are adjacenton calculation. footage square the in included above is described requirements height ceiling the meeting level second of the portion only that square feet, above 1,176 has level first the While finished. roof.All are areas of the pitch the match of 4 height of 9 height maximum a has ceiling of 8 height ceiling a 28 one a For example, height. 7 least of at have ceilings roommust one least further,at 5 least clearancehave ofat a must ceilings under sloping floorthe located calculation, square footage the in included be to Forroom a x

42 ft. Cape Cod ft. 42 ft. ft. - rated wall), themeasurement is made at the walls as the ceiling slopes to to slopes ceiling as the at walls the or or - ft. ft. half of the square footage in the the in footage square of the half - stamping style house has a first level first a with has house style On the second level, the the level, second Onthe orpainted - gradehouses. - and - lasting or permanent lasting , or , othermethods - one concrete. ft. ft. - half ft. ft. - round round -

- grade finished grade finished but a minimum minimum a but ft. coveredplaster

(1.52 - (2.13 (2.13

story,

– m

usually m

); )in

that that

- SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020 5

- - - - In

sq. ft. ft. sq.

story space. space. story - grade finished finished grade two - car garage.” car - grade finished finished grade grade unfinished unfinished grade family house with - ANNEX (INFORMATIVE) - - car garage.” car

- sq. ft. ft. sq. family house follows: - story attached single attached story story detached single detached story - - two two

Finished stairs suitable year for

ft. ft. ft. ft. 2 1 deck and a one a and deck 30.9 30.9 42.5 42.5

house embodies1,176 finished square x x

sq. ft. ft. sq. ft. 42

story attachedstory single - x DECLARATION 22.1 “A above 1,366 with townhouse carriage family above 176 and feet square finished grade utility/ a in feet square unfinished grade includes property the addition, In room. storage 120 a DECLARATION 28.2 “A above 2,201 with house family below 807 and feet square above 96 plus feet, square below 392 and room utility a in feet square basement. a in feet square unfinished grade 100 a has level first The 240 a includes property the addition, In two a and porch enclosed

to be taken to the nearest inch or tenth of a foot using using foot a of tenth or inch nearest the to taken be to nearest the to or units measurement English The system. Metric the using meter a of hundredth nearest the either to reported be must area floor final appropriate. as meter, a of tenth or foot square Examples exampleAn of a Statement of Finished Square Footage of a detached single basement follows: exampleAn of thesquare footage description of a two 28 feet theon first level and 1,176 finished feetsquare on the second level, provided that all areas are finished and the opening in the floor theof second level does not exceed the area of the stair treads. stairsFurther, that descend an unfinished to basement included are in the finished square footage of the first level regardless of the degree of finish of the stairs of finishthe degree or of the area around the stairs. useround ascending to an unfinished areaupper are included in the square footage calculation. addition, areas beneath stairs included are in the finished square footage regardless theof distance between the stairs and belowthe floor or of the degree of finish of that area. concerning statement no makes standard The made calculations footage square between differences method The property. same the for parties multiple by measurements requires footage square calculating for

– story, -

An elevator elevator An

such as chimneys and windows and chimneys as such –

A commonA construction practice is a floor to provide opening stairs for that issame the size as the stairs themselves. Therefore, the area of stairs included in finished square footage is typically equal to the area of the opening in the floor. For example, a two of the second level. However, if the hearth or chimney chimney or hearth the if However, level. second the of the or surface finished exterior the beyond located is be cannot area the floor, a have not does window footage. square finished the in included be should dumbwaiter a and/or chute, laundry shaft, calculation. footage square the in included hearth that is within the exterior finished surface is is surface finished exterior the within is that hearth to floor from extends that window a is as included, and level first the on is hearth the if Further, ceiling. the of interior the through extends chimney the no level, second the on hearth a without level second footage square finished the from made is deduction exterior wallexterior common to an attached garage. surface finished exterior the beyond areas Protruding walls outside the of unless footage square finished in included be cannot and level same the on floor a have protrusions the a example, For requirements. height ceiling meet the main body of the house, but if they are only connected to the house by continuous finished areas such as staircases. hallways or finishesExterior include but not are limited to masonry or masonry veneer; wood, aluminum, or vinyl siding; gypsum or wall board when used on the contributing to unfinished square footage. Practitioners urged are to heed common local convention with regard to garages. Finished areas above garages included are in the finished square footage that is at the same in level garage (and the adjoining laundry) as a structure attached tothe main body of the house. As such, the garage is not typically treated as an unfinished area of the house but as rather a areaseparate simply referred to as However, “garage.” if the garage is located beneath the main body of the house, some localities treat the as area part of the house and The treatmentThe of garage area in the standard allows practitioners to apply local customs. While garages can benever included in finished footage, square the standard does theallow area to be included in unfinished square footage. In the diagrams that accompany this standard, 1 Figure largely shows the separately, measured from the exterior finished surface of the house to theouter edgethe of floor surface or area exterior surface, and calculated by using the method referenced in the standard. 6 SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020

AMERICAN NATIONAL STANDARD FOR SINGLE FOR STANDARD NATIONAL AMERICAN StaffNote: Figure wasre REF

BUILDING SECTION REFER TO LEGEND: FIREPLACE - KITCHEN drawnbut content remained unchanged. GARAGE (Extends to floor) WINDOW

LAUNDRY LIVING ROOM

DINING

ENTRY - FAMILY RESIDENTIAL BUILDINGS RESIDENTIAL FAMILY

FINISHED FLOOR AREA

COVERED PATIO Up (Not counted) STORAGE

UNDER STAIR Dn

Roof Above

floor; neither area floor;neither to the extend doesnot thatwindow protruding foyera open and upper shown,As footage. the finishedsquaregrade footage belowsquare and above as thatcounted floor is area finishedthe encircles line dashedThe below grade. is basement entirelythe entirely grade above and and levelsare entry upper basement. with The house two a through1 depict4 Figures (above grade) Entry 1. FIGURE square footage. square below includedthenot in but is standardprescribedthe in the methodby using calculatedutility is room of the area unfinished Thelevel. entry from the stairsthatthe descend area the including under entirety,its footage in finishedsquaregrade the toward counted below is of basement the finishedThe laundry. area or garage, unfinished fireplace, patio, covered protrudinginclude the level doesnot entry of footage the square calculatedfinishedThe level. footageof upper the to the contributes square - - - - storysingle Level PlanLevel level plan level plan hasan grade finishedgrade - grade finished

family - - SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020 7

Dn FLOOR WITH FLOOR ABOVE SHELF ROOF BELOW ROOF FINISHED FLOOR AREA FLOOR FINISHED

FAMILY RESIDENTIAL BUILDINGS

BATH

LIVING BELOW OPENT TO OPENT

SHAFT

WINDOW floor) to extend not (Does

BATH

drawn but content remained unchanged. remained content but drawn BEDROOM - LEGEND: BEDROOM CLOSET CLOSET OPENING (Not counted) (Not OPENING CHIMNEY AMERICAN NATIONAL STANDARD FOR SINGLE Staff Note: Figure was re was Figure Note: Staff

Level Plan -

FIGURE 2. Upper grade)(above 8 SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020

AMERICAN NATIONAL STANDARD FOR SINGLE FOR STANDARD NATIONAL AMERICAN StaffNote: Figure wasre finished floor area) (List separately from Unfinished Utility Room of walls where below grade Note: Measure to exterior face - drawnbut content remained unchanged.

LEGEND:

RECREATION ROOM

- FAMILY RESIDENTIAL BUILDINGS RESIDENTIAL FAMILY

(To be listed separately) UNFINISHED FLOOR AREA FINISHED FLOOR AREA BATH

(below grade) Plan Basement 3. FIGURE

SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020 9

Grade

Measure to Measure face exterior wall of Open area not area Open floor as included area

FAMILY RESIDENTIAL BUILDINGS

- drawn but content remained unchanged. remained content but drawn - BASEMENT (Recreation Room) (Recreation LEVEL ENTRY

(Dining/Living Room) (Dining/Living FINISHED FLOOR AREA FLOOR FINISHED UNFINISHED FLOOR AREA FLOOR UNFINISHED separately) listed be (To

LEVEL UPPER Staff Note: Figure was re was Figure Note: Staff ATTIC (Not counted) (Not

LEGEND:

BEDROOM

AMERICAN NATIONAL STANDARD FOR SINGLE

GARAGE (Not counted) (Not

grade” area. Finished area. grade” -

(List separately from finished from separately (List footage) square UNFINISHED UTILITY ROOM UTILITY UNFINISHED Measure to Measure finished exterior face Note: In this example, basement example, this In Note: as listed be must footage square “below also must areas unfinished and separately. designated be

FIGURE 4. Building Section 10 SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020

entry level is consideredlevelbelow is entry least at and one toward finishedloft/attic finishedthe square the counting levelfootagehasof that ceilingheight ofleasta at 5 presentsthe 5 Figure building section ofone a Section Building 5. FIGURE AMERICAN NATIONAL STANDARD FOR SINGLE FOR STANDARD NATIONAL AMERICAN

StaffNote: New Figure 5.

- half ofhalf finished square the footageahas 7 ceilingheight of least at

- grade finishedsquare footage. - and - one - FAMILY RESIDENTIAL BUILDINGS RESIDENTIAL FAMILY - half - story with partially house a below

ft. (2.13

m - grade entry level. Thelevel. entry grade area in ). The entire of entire The the). area ft. (1.52 (1.52 m ), SQUARE FOOTAGE–METHOD FOR CALCULATING: ANSI Z765-2020 11

he he

floor calculation floor -

Not included in in included Not second Dn

FAMILY RESIDENTIAL BUILDINGS - drawn but content remained unchanged. remained content but drawn -

Stair opening larger larger opening Stair stair of area than landings and treads Staff Note: Figure was re was Figure Note: Staff FINISHED FLOOR AREA FLOOR FINISHED

Dn footage of stair treads treads stair of footage of that with landings and above floor Include entire square square entire Include AMERICAN NATIONAL STANDARD FOR SINGLE LEGEND:

level square footage; the remaining area of the openingnot included. is of remaining area footage; square the level - as area of stair stair of area as treads Stair opening same same opening Stair

on the left fill the entire opening through which they descend. By definition, the area of the stairs and landing (or, by andby landing (or, thethe stairs area of definition, thethey By entirethrough descend. opening onwhich fill the left right, t on drawing Inthe the footage above. the level of square in is the included opening) the interpretation,of area the calculated to be be and landingthe must treads of area skirt Here, opening. the andthe stair landing merely treads in theincluded upper FIGURE 6. Stairs thethe landing drawing and in above,stair from the treads Viewed stair configurations. Figure two 6 typical demonstrates 400 PRINCE GEORGE’S BLVD. UPPER MARLBORO, MD 20774 800.638.8556