For questions about changing the zone on a particular property in Montgomery County, please contact the Maryland National Capital Park and Planning Commission - Zoning Montgomery general information desk at 301.495.4610 or email at mcp-infocounter@mncppc-mc.org or visit the website by clicking on the link below. The hours are 9:00 AM to 3:30 PM Monday through Friday. The fax number is 301.495.1306.