Standard living room size in Australia
How big a living room needs to be, worked back from a sofa facing a screen with a walkway behind it, and why the open-plan version needs more than the sum of its parts.
A living room is a seating arrangement facing something, with room to walk behind it. That is the whole derivation.
The numbers
| Minimum width | 3,300mm |
| Minimum floor area | 14.0m² |
| Comfortable width | 4,200mm |
| Comfortable floor area | 19.0m² |
| Maximum proportions | 2.2:1 before it reads as a corridor |
Where the minimum comes from: a 2100 sofa run facing a screen wall, with a 1000 walkway behind.
Source: docs/generator-calibration.md — 18 published SEQ plans (last checked 3 August 2026). Dimensional norms taken from a real AU range; the layouts themselves are not copied.
These are the figures Draftie's layout review measures your plan against, generated from the same table the checker uses, so this guide and the tool cannot disagree. Minimums are the point below which a room stops working, not a legal floor: outside ceiling heights, ventilation, sanitary facilities and egress, the NCC does not mandate most room dimensions.
The furniture
| Item | Typical size |
|---|---|
| 2-seat sofa | 1,600 × 900mm |
| 3-seat sofa | 2,200 × 900mm |
| L-shaped sofa | 2,800 × 2,200mm |
| Armchair | 850 × 850mm |
| Coffee table | 1,200 × 600mm |
| Media unit | 1,800 × 450mm |
A 2,200mm sofa facing a screen wall, with a 1,000mm walkway behind the sofa, is where the minimum width comes from. Add the 400–600mm you need between the sofa and the coffee table, plus the media unit's depth, and the room's depth follows.
Seating distance to the screen
The number people ask for and rarely get: roughly 1.5 to 2.5 times the screen's diagonal. A 65-inch television (1,450mm diagonal) wants the sofa between about 2.2m and 3.6m away. This is usually what sets the depth of the room, not the furniture.
If your living room is 3,300mm deep, subtract the media unit at 450mm and the sofa at 900mm and you have around 2m of viewing distance, which is close for a large screen. Either the room gets deeper or the television gets smaller, and it is better to find that out on the plan.
Open plan is not free
Combining kitchen, dining and living into one space saves the walls and the corridors between them, but it does not let you add the three minimums together and stop. The combined space needs:
- The kitchen's walkways, intact
- The dining table's pull-out clearance, intact
- The living room's walkway behind the sofa, intact
- Plus circulation through the space to the rest of the house, which in three separate rooms was a corridor and is now a path across the middle of your living area
Plan that path deliberately. An open-plan space where the route from the front door to the bedrooms runs between the sofa and the television is a room with a road through it.
Orientation, which matters more here than anywhere
This is the room you sit in for hours, so it is the one to aim at the sun. In Australia:
- North-facing is the prize: winter sun in, easily shaded in summer by an eave.
- East gives morning light: good for a breakfast area, less so for an evening room.
- West gives hot late-afternoon sun that is hard to shade with an eave, because the sun is low. Needs external shading or it will drive your cooling bill.
- South is even, cool, and gets no direct sun. Fine for a media room, poor for the main living space.
Checking your own plan
Draw the room, put the furniture in it, and see what is left. Draftie flags every room that falls under the figures above and tells you the shortfall in millimetres, so you find out on the drawing rather than after a builder prices it.
Related: standard room sizes across the whole house, and how to read a floor plan.
FAQ
What is a standard living room size in Australia?
About 4,200mm wide and 19m² is comfortable for a main living area. The practical minimum is 3,300mm wide and about 14m², which takes a three-seat sofa facing a screen with a walkway behind it.
How far should a sofa be from the television?
Roughly 1.5 to 2.5 times the screen diagonal. A 65-inch screen wants 2.2m to 3.6m, which is usually what determines how deep the room needs to be.
How big does an open-plan kitchen, living and dining need to be?
More than the three minimums added together, because the combined space also carries the circulation that used to be a corridor. Keep each zone’s clearances intact and plan the walking route across the space rather than discovering it.
Related guides
Standard study and home office size in Australia
Standard laundry size in Australia
Standard kitchen size and layout dimensions in Australia
Check these numbers against your own plan
Draw your layout in Draftie and every room reports its real dimensions as you move a wall, so a room that is 200mm too narrow shows up before a builder finds it.
Check your plan, freeGeneral information for Australian residential projects, not professional advice. Product specifications and prices change, confirm current details with the manufacturer or supplier before you rely on them. Draftie produces concept plans, not construction documents.