Kitchen Aisle Clearance: One Cook vs Two Cooks

The kitchen aisle is the most lied-about dimension in residential design, because it is almost always measured wrong. Plans show the distance between two closed cabinet fronts — a clean 1100 mm that looks generous on paper. Real kitchens are used with the dishwasher door open, the oven door dropped, a drawer pulled out, and a second person carrying a hot kadhai from the hob to the sink. The aisle that matters is the one measured with everything open, and it is always narrower than the plan suggests.

Indian kitchens sharpen the question further. The cooking is heavier — tadka, pressure cookers, large vessels — which means more heat, more movement between hob and sink, and more simultaneous activity: one person rolling rotis while another washes, a grandmother directing while a cook executes. The one-cook kitchen of the design textbooks is the exception in Indian homes, not the rule. Designing only for one cook is designing for a kitchen that will be used by two.

This article settles the aisle question with the metric standards the industry actually uses: 1200 mm minimum for one cook, 1500 mm for two, the galley widths that make those numbers possible, the appliance door swings that eat into them, and the work-triangle rules that position the hob, sink and refrigerator. Figures are marked to their sources — the metric data standards and the NKBA-origin triangle rules, both commonly cited in practice.

Aisle clearances — one table

The numbers below are clear distances between opposing cabinet or appliance fronts — not wall to wall, and not with doors closed.

The table's third row deserves emphasis because it kills more galley designs than any other rule. Two runs of standard 600 mm base units consume 1200 mm of the room's width before the aisle even begins. A 1800 mm wide galley therefore offers only 600 mm of clear aisle — half the 1200 mm minimum — which is why galleys under 1800 mm cannot take full-depth units on both sides. The honest options for a narrow galley are: full-depth units on one side with shallow 300–350 mm units on the other, or a single-wall kitchen. A 1800 mm galley with 600 mm units on both sides is not a compact kitchen; it is a corridor with appliances.

One cook vs two cooks: the aisle in plan

The plate below draws the two cases side by side in plan, each with a 600 mm appliance door shown open — because the open door is the real condition. At 1200 mm, one cook works comfortably: the dishwasher door drops, and a person still slips past. At 1500 mm, two cooks pass each other with an open drawer between them, and the hot vessel carried from hob to sink travels a corridor, not a squeeze. Note the arithmetic drawn under each plan: the aisle is what remains after the counters are subtracted, never the starting number.

The plate's bottom line is the whole article in one sentence, and it is worth repeating to every client who asks for a narrower kitchen: the aisle is measured with the doors open. A 1000 mm aisle with closed doors becomes a 400 mm slot when the oven door drops — narrower than a human body. Kitchens are not used with everything closed. The dimension that matters is the used dimension, and the used dimension includes every door, drawer and dishwasher.

The galley: why 2400 mm is the honest width

The dimensioned galley below shows the arithmetic that governs every parallel-wall kitchen: 600 mm of base units, 1200 mm of clear aisle, 600 mm of base units — 2400 mm wall to wall. This is the narrowest galley that takes full-depth units on both sides with a one-cook aisle. For a two-cook galley the honest width is 2700 mm (600 + 1500 + 600). Between 1800 and 2400 mm lies the compromise zone: full-depth units on one side, shallow 300–350 mm units or open shelving on the other, with the aisle held at 1200 mm.

The galley's second truth is about the work triangle: in a parallel kitchen, the hob and sink usually face each other across the aisle, which puts the busiest leg of the triangle — hob to sink, the hot-vessel journey — across the walking line. At 1200 mm this works for one cook; at 1500 mm two cooks can cross without the vessel-bearer stopping. And the triangle's legs must still obey the 1.2–2.7 m rule: in a long narrow galley the hob-to-sink distance is the aisle width (fine), but the refrigerator at the far end can easily push its leg past 2.7 m — the fix is pulling the fridge toward the working end, not lengthening the cook's walk.

Door swings and the work triangle

The detail below combines the two remaining drawings: the appliance door swing that consumes the aisle, and the work triangle that organises it. The dishwasher door drops 600 mm into a 1200 mm aisle and leaves 600 mm — passable, but only just, and only for one person. The triangle connects hob, sink and refrigerator in legs of 1.2–2.7 m with a total perimeter of 4.0–7.9 m (the NKBA-origin rule, commonly cited in Indian practice). The triangle's enemy is the through-route: no leg should cross the kitchen's main walking path, because the cook carrying boiling water should never dodge foot traffic.

The tall unit note at the bottom of the plate closes a common loophole: the 560–600 mm deep tall unit at the end of a galley run opens its doors into the aisle, and its swing must be counted like any appliance door. A galley drawn at exactly 2400 mm with a tall unit at the end has an aisle that narrows to 1800 mm of swing plus 600 mm of passage at the unit — acceptable if the unit is at the dead end, problematic if it sits mid-run where traffic passes. End-of-run placement for tall units is not a style choice; it is clearance arithmetic.

What the kitchen costs at these clearances

Clearances do not cost money directly — but they decide the kitchen's size, and size decides the cabinetry bill. A one-cook galley at 2400 mm wide and 3 m long carries roughly 40 sq ft of cabinetry elevation (base + overhead on both runs); at the 2026 rule of ₹1,340–1,800 per sq ft, that is ₹53,600–72,000 for the carcass and shutters. Widening to a two-cook 2700 mm galley adds length, not cabinetry — the cost delta is in the room, not the kitchen. The table prices the honest configurations.

The cost truth the table hides: the cheapest kitchen is the one drawn right the first time. A 2000 mm galley forced to take 600 mm units on both sides gets built, fails in use, and gets rebuilt — the rebuild costs the full cabinetry bill twice. The 2400 mm honest width, or the shallow-unit compromise for narrower rooms, costs nothing extra at drawing stage and saves the entire second kitchen. Clearance is the cheapest quality in the project.

Where each clearance works — and where to avoid

• 1200 mm aisle: one-cook galleys and L-kitchens. The minimum, not the target.
• 1500 mm aisle: any kitchen where two people cook, or where the aisle is also the route to the utility or balcony.
• 2400 mm galley: the honest minimum for 600-deep units both sides.
• 2700 mm galley: the two-cook parallel kitchen — worth every millimetre in Indian homes.
• Shallow units (300–350 mm) one side: galleys 1800–2400 mm wide. Storage, not appliances, on the shallow side.
• Avoid: 600-deep units both sides in any galley under 2400 mm — the aisle drops below 1200 mm.
• Avoid: triangle legs crossing the through-route — the cook with boiling water never dodges traffic.
• Avoid: tall units mid-run in a minimum-width galley — their door swings eat the aisle.