How to tell if property is build-able?

[Jack B.]

I'm looking at some acreage with a house already on it. I'm not sure if all of the land is build-able. I looked at flood and wet lands maps and it came out okay. It's zoned residential. But how can I tell if all of the land is build-able? 

[Jon Holdman]

If this land is here in the Seattle area you will also need to investigate soil conditions and geological hazards.  A soil and/or geotechnical report may be required as part of your plan submission.

Find the zoning code for the locale where the property is located.  That will give you specific information about setbacks, height limits and any other restrictions.  You also need to look at any recorded restrictions.  Some properties here have significant restrictions on them in order to avoid interfering with other houses views.  All of these factors will control what you can build.   A discussion with the planning and zoning department at the locale is also a good idea.  At some point you will have to deal with this department to get your plans approved.