Kitchen Layout Guide: Galley, L-Shape, U-Shape & Island Dimensions

Quick Answer: The minimum walkway between facing units is 900mm; ideally 1050-1200mm for two people passing. The work triangle (fridge-sink-cooker) should have total distances of 4-9m and no single leg shorter than 1.2m or longer than 2.7m. Kitchen layouts are not governed by a single British Standard, but NHBC standards and building regulations Part M (accessibility) provide dimension references.

Summary

Kitchen layout directly affects how functional the space is to live and cook in, and getting the proportions wrong leads to a kitchen that customers are unhappy with long after the install is done. Tradespeople fitting or quoting kitchen installations need to understand the core layout principles and the dimensional constraints that govern the design — both to quote accurately and to advise customers on what is and is not achievable in their space.

The four main residential kitchen layouts each suit different room shapes and use patterns. A good layout minimises the distance between the three key activity zones — food storage (fridge), food preparation (worktop/sink), and cooking (hob/oven) — while maintaining safe, comfortable access. Most kitchen design software uses these principles automatically, but understanding the underlying rules helps you spot problems in a proposed design before ordering commences.

Key Facts

• Minimum walkway width — 900mm between facing runs of units; 1050mm preferred; 1200mm ideal where two people cook together
• Work triangle — sum of the three sides (fridge-sink-hob): ideally 4-9m; no single leg shorter than 1.2m or longer than 2.7m
• Base unit depth — standard 570-600mm to wall; tall units 570-600mm; wall units 300mm depth
• Worktop height — standard 870-910mm (with 18mm worktop on 870mm plinth); adjustable via plinth height
• Ergonomic worktop height — elbow height minus 100-150mm; standard 900mm suits most adults at 165-185cm height
• Plinth height — standard 150mm; can be raised or lowered to adjust worktop height for users
• Wall unit height — bottom of wall unit ideally 450-500mm above worktop surface (clearance for appliances)
• Ceiling clearance for tall units — standard tall units are 2100mm or 2200mm; check room ceiling height allows for fitting
• Island minimum clearance — 900mm minimum on all sides; 1050mm preferred for work comfort
• Accessible kitchen (Part M) — minimum 1500mm turning circle; knee recess under worktop at seated height; accessible fittings
• Building Regulations Part J — combustion appliances in kitchens; gas appliances require adequate air supply
• Building Regulations Part F — mechanical ventilation for cooking extraction (see kitchen extract)

Quick Reference Table

Detailed Guidance

Galley Layout

A galley kitchen has two parallel runs of units facing each other, with a walkway between. This is the most space-efficient layout per linear metre of units.

Key dimensions:

• Minimum 900mm between facing unit fronts (doors open simultaneously = immediate hazard below 900mm)
• 1050-1200mm is the working sweet spot for one or two cooks
• Above 1500mm between runs, the layout becomes inefficient — distances are too long between work zones
• Maximum recommended galley length for efficiency: 5m

Watch out for: traffic from a room door cutting across the galley — even a single entrance mid-way along creates a conflict. If possible, position doors at the ends of the galley only.

L-Shape Layout

The most common UK kitchen layout — units run along two adjacent walls meeting at a corner.

Key dimensions:

• Each run typically 2-4m; combined worktop run of 5-8m is common
• Corner unit: standard corner base unit is 900×900mm (wall dimension); effective internal corner access depends on carcase and door type (standard, lazy susan, or pull-out)
• Work triangle works naturally with sink on one leg, cooking on the other
• Island can be added if room is 4m+ in the short dimension, with 1050mm clearance around the island perimeter

Watch out for: placing the hob in the corner run — this brings the cooking area too close to adjacent walls and limits safe worktop distance either side of the hob (minimum 300mm either side is required for safety).

U-Shape Layout

Units on three walls, forming a U. The most functional layout for maximising storage and worktop space.

Key dimensions:

• Minimum room width (inside the U): 1200mm for single user; 1500mm for comfortable two-person use
• Total run typically 8-12m of base units
• The open end of the U is typically the room entrance
• Work triangle is typically very compact in a well-designed U — fridge, sink, and hob within 1-2m of each other

Watch out for: the U becoming too small — in a room under 3m in the short direction, the 600mm base units on each side leave a 1200mm walkway minimum (900mm floor space + unit faces). In a 2.7m room the U is very tight and a different layout may be better.

Island Layout

An island is a freestanding or fixed unit in the centre of the kitchen, typically in a large open-plan kitchen-diner.

Key dimensions:

• Minimum 900mm clearance on all sides (from island face to nearest unit or wall); 1050mm preferred
• Minimum island size for functional use: 900mm × 600mm
• Hob in island: requires at minimum 400mm clearance of combustible material either side; ceiling extraction must be specified (see kitchen extract)
• Seating at island: allow 700mm height for standard seating (chairs) or 900mm for bar stools; knee recess 250mm deep
• Overhang for seating: minimum 200mm; 300mm preferred

Minimum room size for island: 4m × 4m is the practical minimum for an island with 1050mm working clearance; 4.5m × 3.5m can accommodate a narrower island. Below these dimensions, a peninsula is usually the better solution.

Peninsula Layout

A peninsula is an island attached to the main run of units at one end, effectively creating a U-shape with one open leg. It offers island functionality (seating, zoning the kitchen from the dining area) with less space requirement.

Key dimensions:

• Minimum 900mm walkway on the open sides
• Minimum peninsula length 1200mm; 1500mm+ for comfortable seating
• Can contain hob or sink, subject to extraction and plumbing constraints

Hob Position Rules

The hob position is often constrained by:

• Gas supply: requires gas pipe within the base unit run
• Extraction: cooker hood or ceiling extractor must be positioned above; the flue run must be achievable (see kitchen extract)
• Safety clearances: minimum 300mm worktop either side of hob; hob must not be positioned under a window (curtains can catch flame; window opening disrupts extraction)
• Adjacent material: no combustible material (wooden cabinets) within 100mm above hob to worktop level

Frequently Asked Questions

Does building regulations apply to kitchen layouts?

Building Regulations do not specify kitchen layouts directly. However, Part M (access to and use of buildings) applies to accessible kitchens in certain new-build categories. The relevant dimension is a 1500mm turning circle for wheelchair users, and accessible worktop heights. For extensions and new builds with planning conditions relating to accessibility, consult the approved drawings. Most domestic kitchen refit work does not trigger Building Regulations for the layout itself, but electrics (Part P), extraction (Part F), and gas installation are notifiable.

What's the minimum kitchen size for a new build?

There is no absolute statutory minimum kitchen size in UK building regulations for private dwellings, but the RIBA Space Standards (referenced by many planning authorities for new build) suggest a minimum kitchen area of 6.5m² for a single-person dwelling; 7.4m² for two people. The London Plan Housing SPG and many local planning policies reference these standards. HMOs have specific standards — check the relevant HMO licensing conditions.

Where should the fridge go in an L-shaped kitchen?

The fridge should be positioned at the end of one of the runs, not in the middle. Positioning at the end of a run means the door can open fully without obstructing worktop space. Avoid placing the fridge at the internal corner of the L — this makes access awkward. If a tall fridge-freezer, ensure there is adequate clearance above for the compressor to breathe.

Regulations & Standards

• Building Regulations Approved Document M — access to and use of buildings; accessible kitchen requirements for Category 2/3 (adaptable/accessible) housing

• Building Regulations Approved Document J — combustion appliances; air supply requirements for gas-fired cooking appliances

• Building Regulations Approved Document F — means of ventilation; kitchen extraction requirements

• Building Regulations Approved Document P — electrical safety; socket and circuit requirements in kitchens

• BS 6222 — domestic kitchen equipment; installation and performance

• NHBC Technical Standards — kitchen layout requirements for new build

• RIBA Housing Guidance — Space Standards — minimum space requirements for residential kitchens

• KBSA (Kitchen, Bathroom & Bedroom Specialists Association) — industry design standards and best practice

• kitchen extract — extraction requirements for hob position

• kitchen electrics — socket layout and circuit design

• kitchen plumbing — sink and appliance plumbing constraints

• worktop materials — worktop selection and edge treatment