The kitchen's vertical stack — base units, the gap, overheads, tall units — is where kitchens are won or lost, and it is drawn wrong more often than any other part of the house. An overhead hung 400 mm above the counter crowds the cook's forehead and traps steam; hung 700 mm above, its bottom shelf leaves daily reach. A tall unit at 2400 mm high looks grand in the showroom and strands its top 300 mm in every home without a step stool. These are not style choices. They are reach and clearance numbers, and they have been stable for decades because the human body has been stable for longer.
Indian kitchens test the stack harder than European ones. The Indian cook works standing for long stretches, reaches for masala dabbas and pressure cookers daily rather than weekly, and stores bulk — 5-kilo atta bags, large thalis, festival vessels — that European modules never anticipated. The 2100–2200 mm tall unit exists precisely for this: it converts the dead air above the counter into bulk storage without demanding a ladder. But the same logic punishes excess — every millimetre above comfortable reach becomes a shelf that collects dust instead of dinner.
This article draws the complete vertical stack with dimensions: base, gap, overhead and tall unit, the fixing detail that holds overheads safely to the wall, and the cost arithmetic per unit. Figures come from metric kitchen-data standards, with the commonly cited trade conventions clearly marked where no book ties the number.
The vertical stack — one table
Four elements, six numbers. Everything else in the kitchen hangs off these.
| Element | Standard dimensions | Source | Why this number |
|---|---|---|---|
| Base unit | 600 mm deep × 900 mm high | Metric kitchen-data standard; Architects Pocket Book | Counter height matched to standing elbow height |
| Base unit widths | 300 / 400 / 500 / 600 / 800 / 1000 / 1200 mm | Metric kitchen-data standard | 600 mm modules keep appliances and shutters standard |
| Overhead cabinet depth | 300–350 mm | Metric kitchen-data standard | Shallower than the 600 mm counter — the cook's head clears it |
| Overhead cabinet height | 720 mm (typical) | Common trade practice | Two to three adjustable shelves inside |
| Gap: counter to overhead | 500–600 mm | Commonly cited practice | Working clearance for mixer, kettle, steam |
| Tall unit height | 2100–2200 mm | Common trade practice | Full-height storage within safe reach of lower shelves |
| Tall unit depth | 560–600 mm | Commonly cited practice | Aligns with the 600 mm base run |
| Plinth / toe-kick | 100 mm high, recessed | Common trade practice | Toe space under base and tall units |
The table's most important relationship is the one between overhead depth and counter depth: 300–350 mm against 600 mm. The overhead is deliberately shallower so a standing cook can work at the counter without the cabinet edge meeting the forehead — the single commonest ergonomic complaint in kitchens where overheads were drawn at full 600 mm depth. The 500–600 mm gap is the same logic in the vertical plane: it clears the tallest common countertop appliances (a mixer-grinder is roughly 400–450 mm tall) while keeping the overhead's bottom shelf within reach. Shrink the gap to 400 mm and the mixer lives on the dining table; stretch it to 700 mm and the bottom shelf needs a stool.
Elevation anatomy: the stack as one drawing
The plate below draws the full wall — base, gap, overhead and tall unit — at one scale, so the proportions can be judged the way the eye judges them in the finished kitchen. Notice how the tall unit reads as a single vertical element from floor to near-ceiling: this is intentional. Breaking a tall unit into a base plus a separate overhead above it creates a mid-height joint that collects grime and a visual seam at exactly eye level. The continuous 2100–2200 mm carcass with internal shelves is cleaner to build, cleaner to clean, and cheaper than two stacked boxes.
Two proportions in the plate are worth checking on every drawing. First, the overhead's bottom edge should sit at roughly 1400–1500 mm from the floor (900 counter plus 500–600 gap) — the height at which an average adult's upward reach meets the shelf without a stool. Second, the tall unit's top at 2100–2200 mm should stop 300–500 mm short of a standard 2600–2750 mm finished ceiling, leaving a shadow gap or a filler panel rather than a dust-collecting ledge. Tall units run to the ceiling look impressive in renders and become unreachable storage in homes — the top shelf should hold festival vessels, not daily atta.
Dimensioned section: depth relationships
The section below is the drawing that prevents the forehead problem. It shows, in true depth, how the 300–350 mm overhead sits back from the 600 mm counter front, creating a clear working cone for the cook's head and shoulders. It also shows the tall unit at full 560–600 mm depth — the one element allowed to run deep, because nobody works with their head inside it. When a kitchen feels cramped at the counter, the culprit is almost always an overhead drawn too deep, not a counter drawn too shallow.
The section also settles the tall-unit depth question. At 560–600 mm the tall unit aligns with the base run, so the kitchen reads as one clean line and the tall unit's shelves take the same large vessels the base takes. Shallower tall units — 450 mm, sometimes proposed to save floor space — create a stepped elevation and shelves too shallow for bulk storage, defeating the unit's purpose. If floor space is genuinely short, the answer is a narrower tall unit (450–600 mm wide), not a shallower one.
The fixing detail: what holds an overhead up
An overhead cabinet is a loaded box hanging on a wall, and its fixing is a structural question wearing a carpentry costume. A 600 mm wide overhead, 720 mm high and 350 mm deep, fully loaded with crockery, can weigh 40–60 kg — hung at head height, above the family's daily workspace. The professional fixing is a continuous aluminium hanging cleat screwed into the wall (into masonry or a solid backing, never into bare gypsum board), with the cabinet hooked over it and levelled. Individual L-brackets or screws through the cabinet back into a hollow wall are how overheads end up on the counter. The plate below shows the cleat detail and the backing rule.
The backing rule in the plate is the detail that separates planned kitchens from troubled ones. In homes where the kitchen wall is a gypsum partition rather than masonry, the overhead's weight must transfer into solid wood blocking fixed inside the partition — and that blocking must be positioned before the boards close the wall. Discovering a hollow wall at installation time means either opening the finished wall or accepting brackets into nothing. The overhead positions should be frozen on the drawing before the partition is built, the same way the light plan is frozen before the ceiling grid.
What the stack costs
Tall units and overheads are priced as cabinetry, by the square foot of elevation. The 2026 market rule for BWR-ply carcass with laminate finish runs ₹1,340–1,800 per sq ft of cabinetry, and the table below applies it to the two standard units — so the vertical stack can be budgeted unit by unit, before hardware and accessories.
| Unit | Elevation area | Cabinetry cost at ₹1,340–1,800 / sq ft | Notes |
|---|---|---|---|
| Tall unit 600 × 2100 mm | about 13.5 sq ft | ₹18,100–24,300 | Carcass with shelves; shutters extra in premium finishes |
| Tall unit 600 × 2200 mm | about 14.2 sq ft | ₹19,000–25,600 | The extra 100 mm is one more shelf |
| Overhead 600 × 720 mm | about 4.6 sq ft | ₹6,200–8,300 | Two shutters; soft-close hinges extra |
| Overhead 900 × 720 mm | about 7.0 sq ft | ₹9,400–12,600 | Wider shutters need stronger hinges |
Two cost truths follow. First, the tall unit is the best value per square foot in the kitchen: it delivers full-height storage at cabinetry rates, while the same volume as loose storage furniture would cost multiples. Second, the finish moves the number more than the size — the ₹1,340 end is laminate, the ₹1,800 end approaches acrylic or PU territory, and hardware (tandem drawers, lift-up mechanisms) sits outside both. Budget the carcass first, then choose the finish, then the hardware — in that order.
Where each element works — and where to avoid
- Tall unit 2100–2200 mm: beside the refrigerator, as an oven/microwave tower, or as the pantry end of the run. The workhorse of Indian bulk storage.
- Overhead 720 mm with 500–600 mm gap: the daily-use wall — masala dabbas, cups, plates. Keep it within the cooking zone.
- Overhead depth 300–350 mm: non-negotiable over any working counter. Full-depth overheads belong only over non-working counters, if anywhere.
- Narrow tall units 450 mm wide: for galley kitchens where a 600 mm unit would choke the aisle.
- Avoid: overheads deeper than 350 mm over the main counter — the forehead and the steam both object.
- Avoid: running tall units past 2200 mm — the top becomes unreachable storage that still gets charged at cabinetry rates.
- Avoid: stacking a tall unit from two boxes with a mid joint at eye level — build it as one continuous carcass.
Sources & standards
- Metric kitchen-data standards (firstinarchitecture.co.uk compilation) — base 600 × 900, overhead 300–350 × 400–700, module widths
- Architect's Pocket Book of Kitchen Design — worktop height 900 mm, underside 870 mm
- Commonly cited practice — overhead gap 500–600 mm, tall unit 2100–2200 × 560–600, plinth 100 mm, cleat fixing
- Modular kitchen cabinetry rates: India-market 2026 cost guides, ₹1,340–1,800 / sq ft (indicative, October 2026)




