Set a date and theme for the block party, allowing a minimum of three months for preparation. You can have it in the spring or fall when the weather is nice or the summer for fun in the sun. You can also host one around Thanksgiving, the start of the school year, end of the school year, or whatever comes to mind.
Scout the neighborhood for possible locations if your church compound/parking lot is not large enough. Find places with electricity sources for music boxes and lighting, and restroom facilities. When the location is finalized, apply for temporary street closure permits from your local public works department for information.
Contact your local police department about barricading the street. Make arrangements with the emergency and fire departments as well in order to make sure emergency vehicles are able to enter the party areas at all times.
Advertise this event extensively to church members. Enlist as many volunteers as you can. Because this is a big event, you may want to form a Block Party Committee to stay organized. Have a briefing meeting with the volunteers and coordinators at least twice prior to the party.
Organize the volunteers and assign clear roles for each group. Each group should have a leader. You will need volunteers for the following tasks:
Set a budget. To cut costs, ask for donations from local businesses. You might be able to get gift certificates as door prizes. Some businesses may be willing to provide t-shirts or banners if they can get free publicity as well.
Plan activities/entertainment for the block party according to the budget you have set. Consider ages of adults and children when planning. Some options include: playing in the sprinkler, drawing with sidewalk chalk, face painting, karaoke, lawn darts, basketball shooting, potato sack races, etc. You may want to hire a clown or magician to entertain the children. You can also have an eating contest or chili cook-off as part of the party.
Get supplies. Some items you will need are: paper plates, silverware, napkins, cups, condiments, trash bags, etc. Buy in bulk to cut costs.
Publicize the party two weeks to a month in advance through posting flyers throughout the neighborhood and newspaper ads. Post flyers with information about date, time, location, directions, party activities overview, contact information, and special instructions (e.g. no pets/alcohol, bring lawn chairs, bug spray, sunscreen etc.). If possible, take flyers door-to-door.
Send reminders a week before the party to guests and to those who have signed up to bring supplies.