Quote:
Originally Posted by brendon444
What would I be looking at to add a 16’ wide by 14’ deep addition on a house built in 2008. Thinking it will be on a grade beam foundation with a crawl space and used as a bedroom. Will possibly add a ensuite depending on cost and if we can fit it into this space.
Looking for ideas and how I should go about this project. Had a builder come out today and gave him our house drawing and he is going to give an estimate. I am not sure what a fair price would be with or without a bathroom. Hvac and plumbing seem to be close by.
Any suggestions on what and what not to do?
Attached picture of house where addition will go. Thinking of stepping down the roof line and going with the same pitch roof. Just underneath upstairs window
Open to any suggestions.
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Be careful to ask about proper insulation for the plumbing if you choose to add the bathroom. Many of these crawls are built with the crawl as a cool space (sun rooms, 3 season rooms, boot rooms, etc..)
This is the more cost effective way.
If the intent is to use a grade beam and cold crawl, and you must have a bathroom, I'd locate it closest to the house so you get a decent pitch on the toilet drain and get it back into the plumbing stack back into the house using shortest possible route - and build a warm box around it to keep it a warm space.
I would also cost in radiant floor heat into that space and insulate very well from below using reflective type insulation/vapour barrier.
I can't tell you how many "cheap" additions have ended up being a nightmare for the home owners.
It looks like your grade outside will require your crawl (floor) to be potentially below grade - so make sure they take the appropriate measures if it's a cold/wet space - mold and lack of cool air circulation in short or below grade crawls can be ugly.
I'd let the contractor chime in on prices - but if you have enough electrical available, capacity on your furnaces, etc... you are probably well into the $100K range on something like this to be realistic (and to get it done properly) so it doesn't look like a "me too" patch job.
Having said all of that - if you can make the crawl into a warm space you might be far better off.