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Old 07-28-2012, 11:05 AM
 
138 posts, read 457,987 times
Reputation: 48

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Is there any general rule of thumb on which costs more:
expanding upstairs roof level to get more living space
or
adding additional ground level floor space?

neither would involve a new bathroom or moving existing bathroom.

i thnk i've worked out a plan (in my head) of adding a one level ~ 10' x 18' extension to add 2 bedrooms.

it seems relatively simple to me, but i figure these things probably are never simple.

ideally i'd like to expand the upstairs and save the yard space, but my guess - strictly a guess - is that doing the upstairs would be more $.

any insight is appreciated.

town of babylon.
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Old 07-28-2012, 11:12 AM
 
4,676 posts, read 8,913,919 times
Reputation: 4896
Quote:
Originally Posted by Luke Zing View Post
Is there any general rule of thumb on which costs more:
expanding upstairs roof level to get more living space
or
adding additional ground level floor space?

neither would involve a new bathroom or moving existing bathroom.

i thnk i've worked out a plan (in my head) of adding a one level ~ 10' x 18' extension to add 2 bedrooms.

it seems relatively simple to me, but i figure these things probably are never simple.

ideally i'd like to expand the upstairs and save the yard space, but my guess - strictly a guess - is that doing the upstairs would be more $.

any insight is appreciated.

town of babylon.


2 10 x 9 bedrooms???????? That's rather tiny when you factor in closets and hall.

Depending on the size of your lot and the existing coverage of your lot, an addition may require an area variance.

Also, how many br's do you have now.... and how many br's is your septic rating?

I'd prefer to go up.
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Old 07-30-2012, 07:58 AM
 
1,370 posts, read 4,948,683 times
Reputation: 871
Rules of thumb don't matter much, specifics rule.

on one hand there is more cutting to add in on the top, but to expand out you still have to marry up new and old, same roofing amount, but you have a foundation.

from a personal opinion, I think it really depends which is better based upon how big your yard is and how much you're giving up.

a second floor additon with 2 brs and no bath would be annoying for anyone staying in those rooms having no bath on the floor

9x10 bedrooms are too small unless there are no other options. I have a 10x13 for my son and its kind of small.
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Old 07-30-2012, 11:48 AM
 
Location: New York
2,251 posts, read 4,619,868 times
Reputation: 1611
I looked into this recently - if you go out (building onto your foundation), your taxes are raised.

I have an unused one car garage, looking to go up at add a loft, then convert everything into a rental able (legal) apartment.
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Old 07-30-2012, 03:00 PM
 
456 posts, read 1,331,889 times
Reputation: 282
Either way your taxes will go up, whether expanding out or going up. I just watched my taxes double for my dormer job.
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Old 07-30-2012, 06:44 PM
 
Location: Nesconset, NY
2,202 posts, read 3,905,940 times
Reputation: 2143
Quote:
Originally Posted by Luke Zing View Post
Is there any general rule of thumb on which costs more:
expanding upstairs roof level to get more living space
or
adding additional ground level floor space?

neither would involve a new bathroom or moving existing bathroom.

i thnk i've worked out a plan (in my head) of adding a one level ~ 10' x 18' extension to add 2 bedrooms.

it seems relatively simple to me, but i figure these things probably are never simple.

ideally i'd like to expand the upstairs and save the yard space, but my guess - strictly a guess - is that doing the upstairs would be more $.

any insight is appreciated.

town of babylon.
Generally, adding a 2nd. floor will be less expensive than adding the same amount of space to the first floor. The reason being the cost of providing grade level support (footings, foundation, slab). Excavation, concrete, rebar, etc. for a 1st floor are more expensive than wood framing for a 2nd. floor.
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