For a community of 100, size the prep zone at 150-200 square feet, cooking at 200-250, serving at 80-100 and washing at 80-100, with dry storage of 80-100 square feet at the start of the chain and dining of 400-600 at the end. Each zone has its own tables, water point and rule about what may enter it.
Work zones are the separate areas of a kitchen, each reserved for one stage of food handling so that equipment, water and people stay with their own task.
Each Zone Exists To Keep One Kind Of Material Out Of Another
The parent guide divides a kitchen for 100 people into six zones. This page covers the four working ones; storage and dining bracket them. Floor areas below are the parent’s figures for 100 people. The four working zones sum to 510-650 sq ft (150 + 200 + 80 + 80 = 510; 200 + 250 + 100 + 100 = 650), and adding dry storage gives 590-750 sq ft, which agrees with the guide’s building of at least 600-800 sq ft once dining is housed separately. These sums are this page’s arithmetic. Dining, at 400-600 sq ft, is the sixth zone and may be a separate building or outdoors.
What Each Zone Holds
| Zone | Area (sq ft) | Core contents from the parent guide |
|---|---|---|
| Prep | 150-200 | An 8-10 ft waist-height table, a vegetable-washing station separate from dish washing, cutting boards, knives, peelers, a separate sub-area for raw meat |
| Cooking | 200-250 | A large wood-fired cookstove for pots of 10 gallons or more, a secondary surface or outdoor fire pit, access to a bread oven, a chimney, hood or open-air design |
| Serving | 80-100 | A counter or pass-through window to dining, serving vessels and ladles, hot food kept hot and cold food kept cold |
| Wash | 80-100 | A three-basin sink for wash, rinse and sanitize, a hot-water supply from a dedicated fire or the cookstove, drying racks, a grease trap before the wastewater leaves |
Method: Fit And Test Each Zone
Prep. The vegetable-washing basin must not be the dish sink; soil and raw-meat residue are the main things prep brings in. Give the raw-meat sub-area its own board, knife and surface and keep it at the downstream edge of prep, away from the cooked-food route. A table of 8-10 ft lets three or four people work along one side without reaching across each other.
Cooking. Everything here is heat: the pots, the stove, the oven mouth, the wood. Leave a clear aisle around the largest pot so a stirrer can walk round it, and a ventilation route for smoke (Wood-Fired Cookstoves and Ovens).
Serving. The pass-through is the line between cooks and diners. The kitchen side stays a kitchen: food leaves through it and nothing comes back. Where possible give it a separate return opening for empty vessels.
Wash. Three basins in a row give an order of work: scrub in hot soapy water, rinse in clean water, then sanitize with boiling water (Cleaning and Sanitizing Without Chemicals). The grease trap before the wastewater exit is a stone-lined box with a baffle that catches floating fat before the water reaches a soak pit (Greywater Management).
Common Mistakes
- Letting the wash zone double as the vegetable-washing basin. Soil from the roots ends up in the dish water.
- Cooking surfaces without a nearby clear counter. Cooks then use the nearest flat space, often the raw-meat table.
- Skipping the drying racks. Wet dishes stacked tightly stay damp and re-contaminate.
Safety
Hot water and fat in the wash zone
The wash zone holds the kitchen’s hottest water and hot fat on the way to the grease trap. A scald from a basin of near-boiling sanitizing water is as serious as one from the stove: keep the sanitizing basin at the end of the sink away from the walkway, dip with a long-handled basket rather than by hand, and cool any burn under running water (Thermal Injury Care).
What’s Next
- Learn next: Scaling for 30 vs 100 vs 150 People — what happens to these areas as headcount changes
- Combine with: Handwashing Stations — the point where people enter the zones