San Ysidro Business Improvement District More information coming soon. About Us About Us Home Business Improvement Districts Economic Development Funding Programs Maintenance Assessment Districts Property and Business Improvement Districts Publications Tourism Marketing District Video Gallery Interactive Map of Assessment Districts Placemaking Urban Agriculture Incentive Zone Business Improvement District Organizations City of San Diego Economic Development Department 1200 Third Avenue, 14th Floor San Diego, CA 92101 Phone: 619-236-6700 Fax: 619-533-3219 Email: sdbusiness@sandiego.gov