Alchemyjim Posted March 31, 2022 Share Posted March 31, 2022 Hello everyone, When creating the as-built model and getting the actual living area it often conflicts with the listed living area on the property title. This happens for lots of reasons but it is usually because at some point an assessor measured the exterior and came up with a number. It can be a few feet to a few dozen off. The question is what do you list on your plans in this situation? The building department checks and if your number does not match the title they bring it up. So do you get it changed or just show it as listed? I've run into a few instances where the floor area ratio is tight and a few feet makes a big difference. Just curious how everyone deals with that. Link to comment Share on other sites More sharing options...
Joe_Carrick Posted March 31, 2022 Share Posted March 31, 2022 Living Area may be different for a variety of reasons: Unspecified space (shafts, etc) are not included as "Living Area" Garages, etc are not included as "Living Area" Standard Area is a better representation of the area of a building - it's typically measured to the exterior face of the walls. OTOH, using 2D CAD Polylines as the object to use for area when performing FAR, Site Coverage, Impermeable/Permeable, etc gives you much more flexibility. That way you can easily match what might have been indicated by an assessor or surveyor. Link to comment Share on other sites More sharing options...
builtright3 Posted March 31, 2022 Share Posted March 31, 2022 I agree with Joe Carrick and I add this: I always check to see if Im close on the square footage after I do the as-built just to see if I may have someing wrong but most of the time is pretty close. I also always jut put in what is recorded becasue I dont want to open a can of worms and try to fix it becasue its a waste of time. On the new area I calculate to exterior of the framing as per required by the cities that I work in. Note: Unlike Joe I dont measure to the exterior finish, I measure to the exterior rough framing for square footage. It's funny how this doesnt seem to be a standard accross the board with all cities and architects. 1 Link to comment Share on other sites More sharing options...
Joe_Carrick Posted March 31, 2022 Share Posted March 31, 2022 6 minutes ago, builtright3 said: Unlike Joe I dont measure to the exterior finish, I measure to the exterior rough framing for square footage. Actually, I also measure to the exterior (wall dimension line). I didn't mean to imply the "Finish Face". The Exterior Room Polyline will provide this. 1 Link to comment Share on other sites More sharing options...
CharlesVolz Posted March 31, 2022 Share Posted March 31, 2022 I use ANSI Z765. A revised version is available in 2021. ANSI Z765-2013.pdf 1 Link to comment Share on other sites More sharing options...
builtright3 Posted March 31, 2022 Share Posted March 31, 2022 3 hours ago, Joe_Carrick said: Actually, I also measure to the exterior (wall dimension line). I didn't mean to imply the "Finish Face". The Exterior Room Polyline will provide this. Thanks for clearing that up. Was wondering if I miss read it Link to comment Share on other sites More sharing options...
builtright3 Posted March 31, 2022 Share Posted March 31, 2022 2 hours ago, CharlesVolz said: I use ANSI Z765. A revised version is available in 2021. ANSI Z765-2013.pdf 4.71 MB · 2 downloads Thank you for that Charles! Link to comment Share on other sites More sharing options...
CharlesVolz Posted March 31, 2022 Share Posted March 31, 2022 The new 2021 version is copyrighted, but you can buy it HERE in electronic PDF for $25. BTW, ANSI measures to the exterior surface (cladding) of the exterior walls and includes the stair area on both floors. Best, Charles Link to comment Share on other sites More sharing options...
builtright3 Posted March 31, 2022 Share Posted March 31, 2022 16 minutes ago, CharlesVolz said: The new 2021 version is copyrighted, but you can buy it HERE in electronic PDF for $25. BTW, ANSI measures to the exterior surface (cladding) of the exterior walls and includes the stair area on both floors. Best, Charles To me it seems silly to include the stair area for both floors but I dont make the rules. Link to comment Share on other sites More sharing options...
lbuttery Posted March 31, 2022 Share Posted March 31, 2022 There are many "official" methods for SQFT living area depends on the agency asking for 15 years I have suggested that Chief create a schedule listing the most common ones then the user can use the desired info best to contact the planning dept and inquire which "official" method they use then to get Chief to match it Lew Link to comment Share on other sites More sharing options...
glennw Posted March 31, 2022 Share Posted March 31, 2022 In the Plan defaults you can specify if you want the Living Area label to be measured to Main Layer or Surface. If there is any doubt, the manual or auto adjustable polyline is the way to go. Link to comment Share on other sites More sharing options...
builtright3 Posted April 1, 2022 Share Posted April 1, 2022 For job building data that I submit to the city. I use poly lines. Much easier to see exactly what is being calculated and its automatic calculations with using macros. 1 Link to comment Share on other sites More sharing options...
SteveNovato Posted April 2, 2022 Share Posted April 2, 2022 It seems that the areas of buildings and lots most always differ, depending on the source. I use the following explanation in my 'building and zoning data'; FINISHED SQUARE FOOTAGE OF BUILDING CALCULATED USING ANSI METHOD WITH ASSESSOR MAPS AND DATA ALSO INTEGRATED. SQUARE FOOTAGE OF STRUCTURES, OR LOT SIZE, MAY VARY AND ARE NOT GUARANTEED. I have never had a plan kicked back for a minor discrepancy in these numbers...yet! Steve 1 Link to comment Share on other sites More sharing options...
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