A kitchen catalogue can make base units look like blocks that simply add up to the wall length. Real fitting is messier. Walls are not always square, floors are not always level, pipes may land behind the wrong unit, and a wide pan drawer is useless if an appliance door blocks it.
Kitchen base unit types and when to use them
| Base unit type | Useful for | Watch out for |
|---|---|---|
| Standard cupboard | General storage, cleaning supplies and large items. | Deep shelves can hide items at the back unless pull outs are added. |
| Drawer unit | Pans, plates, cutlery, food storage and better reach. | Needs clearance in front and stronger runners for heavy loads. |
| Sink base unit | Sink bowl, trap, waste, valves and sometimes bins. | Pipe positions can reduce usable storage. Measure the sink and waste route. |
| Corner unit | Making an L shaped kitchen usable. | Corner mechanisms need door clearance and accurate fitting. |
| Integrated appliance unit | Dishwasher, washing machine, oven, fridge or freezer planning. | Ventilation, power, water and door lines all need checking. |
| Pull out or bin unit | Narrow gaps, recycling, oils, spices and accessible storage. | Check width, runner quality and whether the handle position works. |
Base unit planning calculator
This rough calculator helps avoid over ordering full cabinets before a survey. It is not a final kitchen plan.
Common kitchen base unit widths
Many UK kitchen systems use widths such as 300, 400, 500, 600, 800 and 1000 mm, but this is supplier specific. A designer also needs filler panels, service voids, end panels and tolerance for walls that are not straight.
| Width | Typical use | Planning note |
|---|---|---|
| 300 mm | Narrow pull out, spice storage, tray storage. | Useful for leftover space, but do not rely on narrow units to fix a poor layout. |
| 400 to 500 mm | Small cupboards, drawers, bins or gaps near appliances. | Good for balancing a run when 600 mm units do not divide evenly. |
| 600 mm | Common appliance, sink, drawer and cupboard module. | A practical default, but not a rule for every space. |
| 800 to 1000 mm | Wide drawers, pan storage and large cupboards. | Check floor level, runner load and handle clearance. |
Layout checks before ordering units
- Sink position: the sink base must work with water supply, waste fall, dishwasher route and window or wall clearance.
- Cooking zone: hob, oven, extractor and pan storage should be planned as one group.
- Dishwasher door: a dishwasher can block drawers, bins or walking routes when open.
- Corner access: magic corners and carousel units need accurate door swing and clearances.
- Worktop support: wide openings, undermount sinks and heavy tops may need extra support.
- Finished height: plinth, legs, cabinet box, worktop and flooring decide the final worktop height.
Drawers, cupboards or pull outs?
Drawers are often better for daily access because you can see the full contents from above. Cupboards still make sense around sinks, low use storage and budget sensitive areas. Pull outs are useful in narrow gaps, but cheap hardware can become frustrating if it carries heavy tins or pans.
| Need | Often best | Reason |
|---|---|---|
| Heavy pans | Deep drawer unit | Better access and less crawling into a cupboard. |
| Cleaning products | Sink cupboard or pull out | Works around pipes and keeps items grouped. |
| Recycling | Bin pull out | Keeps waste sorted and hidden, but needs width and runner strength. |
| Awkward corner | Corner mechanism or blanked corner | Sometimes a simple blank corner gives a cleaner, cheaper layout. |
Sources and checks used
- Scottish Government domestic technical handbook: domestic building standards context for kitchen alterations.
- HSE catering kitchen safety sheet: practical layout, access and slips thinking for work areas.
- WRAS installation requirements notes: water supply and pipework context around sinks and appliances.
Cabinet supplier checks before choosing base units
Base-unit names vary between suppliers, so check the cabinet system before planning filler panels, drawer packs or appliance gaps. Howdens, Kitchen Door Workshop, Blum and Hettich are useful reference points for cabinet widths, door fronts, drawer hardware and hinge/running gear, especially where heavy drawers or replacement fronts are being mixed with existing units.
- Howdens kitchen cabinets: common UK cabinet and base-unit context.
- Kitchen Door Workshop kitchen doors: replacement-front sizing and door-style context.
- Blum box and drawer systems: drawer box, runner and load-planning context.
- Hettich hinges: hinge and fitting reference for doors on base units.
FAQ
What are the main kitchen base unit types?
Common base units include drawer units, sink base units, corner units, appliance housings, pull out storage, bin units and standard cupboard units.
What size are UK kitchen base units?
Many systems use 300, 400, 500, 600, 800 and 1000 mm widths, but exact ranges vary by supplier. Worktop height, plinth height and service space need measuring on site.
Are drawers better than cupboards in base units?
Drawers often improve access to pans and food, but cupboards may suit sinks, services, larger appliances and tighter budgets.
