That's a pretty general question, suggest you provide more detail on your project, i.e. square footage, what's the specific scope of what you want done (does GC drywall?

I was told to do a water proof system from exterior, by digging deep around the house, which is very expensive: $50k for a 1200 square footage area.I am wondering if there is any less costly alternative option for the water proof system?

It should include property age, square footage and number of bed/bath.

If you buy it in your name, there is a nice home business expense that is based on the square footage. 

With companies realizing that their employees can work from home, more are opting to reduce their square footage significantly. 

@Nicolas Boesch yes the basement is the same sq footage and is a walkout with private entrance no access from the upstairs unit and it would be a 3 bed 2ba.

Once you mess with the structure, add more square footage, or do something zoning has to review then you might need an architect and other professionals.

They could require a certain square footage, a security system, they could require you to be a certain distance from the business, wifi, cable, certain size bed/s, any number of things. 

in terms of sq footage or acreage? 

-Usually need more square-footage to repair- U&O is always going to be up your case and will wack you with even the smallest chip in the sidewalk, telling you that you need to drop 5-7k just in cement before you even get approved to touch your home. - Comping is not as cookie cutter as it is in the city, now you are usually dealing with different styles, build types, etc.Always feel free to reach out to me!