9 Feet Under: Some Thoughts About Valuing Basements and Cellars
Posted by Jonathan Miller - Friday, June 22, 2012, 2:16 PM
I’m not sure what’s in the water these days but I am receiving a growing number of emails and calls about the valuation of basement space from real estate agents so I thought I collect my thoughts and cobble together a post to point people to.
First, a few definitions for the sake of clarity and in order of depth:
At Grade Ground level
The valuation of below grade space, whether its a co-op, condo or house uses the same principals we use when appraising outdoor space. I see it as an amenity “add on” because not all properties have them.
When appraising, we attempt to establish the value of the above grade space on a per square foot basis. The below grade space, ie a basement or cellar, can be viewed as a portion or percentage of the value of the above grade space – “cents on the dollar”. In other words, the value of basement area is proportional to the value of the residence that sits above it. It’s worth more in a home that is of high value than a home with a lower relative value.
“Technically” Below Grade, The “English Basement”
Question is it legal to count basement space as part of the sq. footage when selling a town home? This particular house has a 9-ft ceilinged finished basement but no windows. My buyer wants to know for resale purposes.
Answer For suburban homes, a traditional basement is below grade and would not be included in overall square footage even if it is finished and has rooms. In NYC brownstones, the same rule applies EXCEPT a basement could be included if it is a few steps below grade in the front and opens at grade in the rear (aka “English Basement”) AND the space has the same finishes, ceiling height as the floor above and includes a key room like a kitchen. If the space isn’t considered the equivalent to living area on the floor above it is NOT included in total sq ft but adjusted for separately. In the case of a brownstone with an “English Basement”, the space below is referred to as a “cellar” and is never included in the sq ft.
Condos and Co-ops With Basements
Question I’m the sellers broker for a ground floor duplex loft space. We are currently in contract and we marketed the space as a one bed because the lower level is used as just that. The lower level is beneath ground without windows. The appraiser tells me that the C of O for the space calls for the lower level as a recreation space not a bedroom. Should this have a significant impact on the value of the apartment. Can’t is be viewed as loft space, period. Thank you for any insights you may have.
Answer Technically, the below grade area shouldn’t be called a “bedroom” and the sqft should not be included in the total sqft in an appraisal. However it contributes value and is handled as a separate line adjustment in the appraisal. The value of the space is usually something less than the ppsf of the ground floor if there was no basement. That applies to room count as well. The logic follows that if this space was a 1st and 2nd floor duplex instead of ground floor + basement, it would be worth more, everything else being equal. I’m not sure about “significant impact” but it makes it worth less than a fully above grade similar sized space. If the selling price is consistent with that relationship of competing properties, then there should be no problem with purchase price. The appraiser problem is really what you are referring to. Unfortunately, there is nothing you can do at this point since they have already inspected the property and are impossible to contact. Hopefully it will work out.
How Appraisers (Should) Handle It
Basement Sleeze During Boom
The Math (Market Derived)
English Basement No adjustment – I’ve never observed an impact on a brownstone’s “English Basement” square footage – it is simply part of the gross building area of the brownstone.
That’s all the dirt I can think of. Hope this helps clarify things.
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