It is going to vary widely depending on what materials you want to use. What I have found with the little I have subcontracted out is to multiply your materials by 85-90% and that will be the additional labor cost for your project. Now if you have to remove material that is already installed that labor cost will be additional.
I have a similar situation, garage and house are about 5 feet apart. Approximately how much would someone charge for this?
It is going to vary widely depending on what materials you want to use. What I have found with the little I have subcontracted out is to multiply your materials by 85-90% and that will be the additional labor cost for your project. Now if you have to remove material that is already installed that labor cost will be additional.