Interior design tips and tricks
Practical design principles that make a renovation feel considered and cohesive, without requiring an interior designer. Apply these to every room-level decision before you lock in finishes.
- Work to a 60-30-10 colour split: a dominant, a secondary, and an accent
- Float the sofa 30 to 40 cm off the wall so the room can breathe
- Run a dining rug 60 to 75 cm past every edge of the table
- Choose finishes for how they wear over time, not just how they look in a showroom
Getting the sequence right
The order to make decisions in
Most interior regrets are timing mistakes, not taste mistakes, a good choice made in the wrong order forces expensive rework. Settle your decisions in roughly this sequence, each one keying off the ones above it:
Flooring, wall colour direction, tiles, built-in joinery. These are the hardest and most costly to change, and everything else is chosen to sit against them.
Sofa, bed, dining table, and the rugs beneath them. Their scale and placement set the proportions of the whole room. Art you already own belongs here too: it is a fixed input like the sofa, so pull two or three colours from it now and build the palette around it, rather than trying to match art to a finished room later.
Layers, fittings, and switch positions. This must be settled before the electrical rough-in, while the walls and ceilings are still open; moving a downlight or adding a wall light afterwards means cutting into finished plaster.
Measured once floor levels are final. If you want a curtain track recessed into the ceiling, that has to be coordinated before the plaster goes up, not after.
Curtains, cushions, throws, and the secondary and accent layers of your palette.
Last, and layered in gradually over time rather than bought all at once.
Colour in context
How colour affects perceived space
Light colours reflect more light and make the walls appear to recede, which makes small rooms feel slightly larger. Dark colours absorb light and pull walls inward, which creates a sense of enclosure and warmth. The effect is real but often overstated: a small room painted dark can feel sophisticated and intentional rather than oppressive, provided the lighting is generous. The worst outcome is a dark room with insufficient light, not a dark room as a design choice.
Painting ceilings slightly lighter than the walls (or white) pushes the ceiling up visually. Painting the ceiling the same colour as the walls creates a cocooning effect that works well in bedrooms and dining rooms but can feel heavy in kitchens or bathrooms.
Light walls reflect light and appear to recede, so a small room feels larger and more open.
Dark walls absorb light and pull inward, creating enclosure and warmth. Sophisticated with generous light, oppressive without it.
A ceiling lighter than the walls, or white, pushes the ceiling up and lifts the room.
The same colour overhead cocoons a room, well suited to bedrooms, heavy in kitchens or baths.
Connecting rooms with a shared palette
In an open-plan home or anywhere rooms are visible from one another, a consistent palette creates visual flow and makes the home feel larger and more cohesive. This does not mean every room must match. It means repeating one or two colours across adjacent spaces so the eye travels without jarring transitions.
A practical method is to select one neutral that will appear in every room (as walls, flooring, or upholstery), one secondary colour that appears in two or three rooms, and one accent that is used sparingly and only in the rooms where the designer wants to draw attention. The neutral carries the thread; the accent provides the punctuation.
How artificial light changes colour
Paint colours shift significantly under different light sources. Warm incandescent or halogen light (2700–3000 K) brings out the yellow and red undertones in a colour. Cool daylight-balanced LEDs (4000–5000 K) push colours toward blue and grey. A white that reads as cream under warm evening light can look clinical under cool task lighting.
The practical implication is that you should always assess your paint choices under the lighting conditions the room will primarily use. A kitchen painted in a warm white may look perfect in the showroom but greenish under cool LED down lights. Specify your bulb colour temperature first, then test your paint choices under that temperature.
Warm (amber) to cool (blue-white). Specify 2700–3000 K for artwork and living areas; 4000 K for kitchens; confirm before finalising paint choices.
Spatial planning and furniture layout
Traffic flow and clearances
Before finalising any furniture layout, map the natural movement paths through the room. The main traffic corridor needs a minimum of 90 cm clear width. Secondary paths, such as the route between a sofa end and a wall, can reduce to 60 cm if they are infrequently used. Dining chairs require 75 cm behind them when pulled out from the table; any less and seated guests block the path entirely.
Beside a bed, 60 cm is the minimum comfortable clearance for dressing and making the bed on both sides. In a bedroom where two people share the space, both sides should meet this minimum. Reducing one side to 45 cm is workable if the room genuinely cannot accommodate more, but anything below 45 cm on either side will feel constrained in daily use.
Anchoring a space with a rug
A rug defines the boundary of a seating or dining zone and grounds the furniture within it. The most common mistake is choosing a rug that is too small, which floats beneath the coffee table and makes the seating group appear unrelated to the floor. There are three accepted approaches:
The rug is large enough that all furniture legs sit on it. Works best in large rooms with generous proportions; the rug reads as a room-within-a-room
Only the front two legs of each sofa or chair sit on the rug. The most practical approach for medium-sized rooms and still unifies the group
The rug sits completely beneath the coffee table and no furniture legs touch it. It reads as an island and breaks the room apart
Translate those approaches into actual dimensions before you buy. Measure the furniture footprint first, add the margin, then size up to the nearest standard rug.
Floating furniture off the walls
Pushing all furniture against the walls is one of the most common layout errors in residential spaces. It creates a perimeter of objects around an empty centre, which paradoxically makes a room feel smaller, not larger. Instead, pull sofas and chairs away from the walls and arrange them around a central focal point: a fireplace, a view, or a coffee table. Even 30–40 cm of breathing room between the back of a sofa and the wall transforms the spatial quality of a room.
The exception is storage pieces, sideboards, and beds, which belong against walls because their function requires it. Anchor these pieces and then float the seating around the room's centre of gravity.
Room feels smaller. A perimeter of objects, hollow centre.
Room feels larger. The group has breathing room, circulation is clear.
How to work around your art
Let the art lead the palette
If you own a piece of art you love, it is often easier to extract your room palette from it than to find art that matches a palette you have already committed to. Pull two or three colours from the work and treat them as your 30% and 10% layers. The art then reads as native to the room rather than hung as an afterthought.
Hanging height
The standard rule is to hang art so the centre of the piece sits at approximately 145–150 cm from the floor, which places it at average eye level. When art is hung above furniture, the gap between the bottom of the frame and the top of the furniture should be 15–25 cm. Any closer and the piece feels trapped; any further and the relationship between the two breaks down.
Grouping multiple pieces
When hanging a gallery wall, treat the collection as a single object. Lay the frames on the floor first and arrange them until the overall shape is balanced. Maintain consistent spacing between frames; 5–8 cm is a workable gap for most domestic scales. A unifying element across the group, whether consistent framing, a shared subject matter, or a limited colour range, prevents the wall from reading as a miscellaneous collection.
Lighting your art
Art that is not lit intentionally is art that is not seen properly. A picture light mounted to the frame or a directional track light aimed at the piece will lift it out of the ambient light level of the room. Specify a colour temperature of 2700–3000 K for artwork to preserve warmth; cooler temperatures can flatten colour and make a painting feel clinical.
Lighting design
The three layers of light
Every well-lit room works from three distinct layers, each serving a different function. Design all three before your electrician does the rough-in, because retrofitting layers is expensive.
Room-by-room lighting guidance
Each room has distinct lighting needs. The decisions below should be made with your electrician during the rough-in stage, before walls are closed.
Colour rendering (CRI)
Colour temperature sets how warm or cool a light looks, but a second, separate spec decides how truthfully it shows colour: the Colour Rendering Index (CRI), measured from 0 to 100 against natural daylight. A low-CRI lamp can be a flattering warm white and still make paint, timber, and fabric look flat or subtly wrong compared with how they appeared in the showroom, one of the most common sources of disappointment after a renovation, because the finishes you carefully chose no longer read as you expected.
Colours read flat and greyed. The finishes no longer match what you chose.
Colours render true, the way they looked in the showroom sample.
For general living spaces, specify a CRI of at least 90. Where accurate colour matters most, a bathroom mirror where you judge skin tone and makeup, inside a wardrobe, and especially over artwork, push to CRI 95 or above. Because CRI and colour temperature are independent, always confirm both figures when ordering a fitting; a warm 2700 K downlight tells you nothing about how faithfully it will render the colours beneath it.
Window treatments
Curtain hanging height and width
Where you mount the curtain rod has a greater effect on the room than the fabric you choose. The standard approach is to mount the rod 10–15 cm above the top of the window frame, which draws the eye upward and makes the ceiling feel higher. In rooms with ceilings of 2.7 m or more, mount the rod as close to the ceiling line as practical, often 5–8 cm below the cornice. Hanging curtains just above the frame is a common shortcut that makes windows, and therefore rooms, look short.
The rod should extend 15–30 cm beyond the window frame on each side. This allows the curtains to stack off the glass when open, maximising the amount of natural light that enters the room. A curtain that stacks partially over the glass cuts light even when "open" and makes a window look smaller than it is.
Rod 10–15 cm above the frame and 15–30 cm beyond each side. Curtains stack off the glass, the room reads taller.
Rod just above the frame, curtains partly over the glass. Cuts light and makes the window, and the room, look short.
Fabric weight and lining
The weight and construction of curtain fabric determines how the treatment hangs, how much light it filters, and how well it performs thermally and acoustically. The most common options are:
Blinds and shutters
Roller blinds, roman blinds, venetian blinds, and plantation shutters all serve distinct purposes and suit different aesthetics. Plantation shutters are a fixed architectural element and suit rooms where you want hard lines and permanent privacy control. They do not work well in rooms where you want to maximise light, because even open slats restrict flow compared to a curtain stacked off the glass.
Roller blinds inside the recess of a window opening give a clean, modern appearance. Blinds mounted outside the recess (face-fixed) cover more wall area and make windows appear wider. Wherever possible, use a bottom-up or double-roller system in living areas where privacy at the lower half of a window is needed without sacrificing light at the top.
Design choice tips
The 60–30–10 rule
Apply colour in three layers: 60% dominant (walls, large upholstery), 30% secondary (curtains, rugs, smaller furniture), 10% accent (cushions, art, accessories). This ratio prevents visual clutter and gives the eye a natural resting point.
Mix materiality deliberately
Avoid rooms where every surface is the same material or finish. Pair a matte surface with a gloss one, timber with metal, linen with leather. The contrast creates depth without the need for additional colour. Aim for three to four distinct textures per room.
The rule of odds in styling
When grouping decorative objects, use odd numbers: three vases rather than two, five books rather than four. Odd-numbered groupings read as more dynamic and intentional than even pairs. Within a group, vary the height of each object so the eye moves across them rather than sitting flat across a uniform line.
Apply the same principle to sofas with cushions: three or five cushions in varying sizes almost always looks more considered than two or four symmetrically placed ones. The asymmetry reads as comfort rather than showroom staging.
Two matching objects at one height. Symmetrical, predictable, and the eye sits flat across a uniform line.
Three objects at different heights. The eye moves across them, so the group reads as intentional.
Even, matching pairs placed symmetrically. Correct, but it reads as showroom staging.
Odd numbers in varying sizes, arranged loosely. The asymmetry reads as comfort.
Scale and proportion
Furniture that is too small for a room reads as tentative; furniture that is too large feels oppressive. A common mistake is buying furniture in a showroom where the scale reference is wrong, then bringing it home to a room with lower ceilings or a different floor area. Always mark out furniture footprints on the floor with masking tape before ordering anything that cannot be returned.
Ceiling height governs more than people expect. Standard Australian residential ceilings are 2.4 m. With that height, cabinetry and bookcases at 2.1–2.2 m read well. At 2.7 m or higher, 2.1 m cabinetry looks like it is floating. Match the vertical scale of your fixed elements to the ceiling height of the space.
Finishing touches
Mirror placement
Mirrors amplify light and create the illusion of depth when positioned to reflect a light source or a view. The most effective placement is opposite or adjacent to a window, so natural light bounces across the room rather than stopping at the wall behind it. Avoid placing a mirror so it reflects a blank wall, a cluttered zone, or directly back at the viewer at seating height.
In small rooms, a single large mirror on one full wall is often more effective than several smaller ones. The larger the reflective surface, the more convincingly it extends the room. In dining rooms, a mirror on the wall adjacent to the table, rather than opposite it, reflects the table setting at an angle that feels elegant rather than confronting.
Plants and biophilic design
Living plants introduce organic texture, movement, and scale variation that no manufactured object replicates. A single large-format plant (a fiddle-leaf fig, a monstera, or a mature potted olive) in a corner or beside a sofa provides more visual interest than a shelf of smaller objects. The height and spread of a well-chosen plant fills awkward vertical space without requiring a piece of furniture.
Match plant selection to the room's light conditions honestly. A low-light north-facing room in the Southern Hemisphere supports different species to a sun-facing living room. Placing a sun-loving plant in a dark corner and watching it decline is a predictable outcome that does not improve the room.
Styling a vignette
A vignette is a small, curated arrangement on a surface: a bedside table, a console, a windowsill. The principles that apply to large rooms apply at this scale too. Vary the heights of objects. Include a mix of textures: something ceramic, something natural, something reflective. Add one object with personal meaning. Keep the number odd. Leave negative space; a styled surface that is too full looks like a shop display rather than a home.
The best vignettes combine three things, and the trio below is the shorthand: something living, something functional, and something meaningful.
That combination of utility and intention is what separates a considered home from a styled one.
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