There probably is a reason he can't get one himself. A permit does not necessarily mean an increase. Check with the assessor's office . Get your plans together. It may take a week or ten days to get the plan reviewed and approved.
Site Plan Use a survey, or draw an accurate site plan.
Show your property lines, all existing buildings, dimensions, and where you propose to put what. The main purpose of the site plan is to review the project for compliance with the zoning ordinance . Zoning ordinances regulate land use, and open space requirements. Every jurisdiction is different, but all will have requirements as to where you may place a building. Check with your local zoning office as these setbacks vary from City or Township, and often from area to area with a jurisdiction.