I once walked through a house that looked immaculate from the street and was quietly falling apart at every edge. The body colour still held. The window frames were splitting, the balcony rail had rust bleeding through, and the roof had faded in patches.
Different surfaces age at different speeds. Painting them all on the same day is how you end up repainting the wrong things.
The owners had treated painting as one job you do to a whole building. It is not. Every surface faces a different set of conditions, and asking how often to repaint only has a useful answer once you break the house into the parts that wear at different rates.
Paint is protection before it is decoration. That framing changes the decision, because it means visible failure is a deadline and a fresh coat on a sound wall is optional.
What actually sets the interval
Every number below is an estimate. A sheltered bedroom wall can look right for a decade; a west-facing exterior can chalk in three. The variables are exposure, surface, and how well the last coat went on.
That last one gets underrated. Paint applied over dust, chalking, mould or loose material fails early no matter what it cost. A surface that was cleaned, repaired and primed properly will outlast a premium product applied badly, every time.
Colour matters too, in both directions. Deep colours show fading first on sun-exposed surfaces. Very pale colours show dirt and handprints first indoors. Neither is a reason to avoid either, but it is worth knowing which failure you are signing up for. Every room needs a hint of red somewhere, and I would rather repaint a red room a year early than live in a beige one.
Interior walls: five to seven years
That is the general case, and room use moves it a long way in both directions.
Formal rooms and adult bedrooms get less contact, less moisture and less cleaning, so a sound coating can run past seven. Hallways, family rooms and open-plan living take constant low-grade abuse — furniture rubbing, hands on corners, bags scraping a narrow passage — and want repainting every three to five.
The signals that it is time are specific rather than aesthetic. Scuffs that no longer clean off. Glossy patches where you have washed the same spot repeatedly. Cracking around doors and windows. Stains bleeding back through. Visible touch-ups that no longer match.
One rule that is not negotiable: never paint over damp or recurring mould. Find the water first. Coating it just buys you a few months and a bigger repair.
Children's rooms: three to four years
Adult bedrooms often get repainted for taste rather than wear, which is a perfectly good reason. Children's rooms get repainted because of marks, dents, drawings and changing minds, and three to four years is realistic.
Two things make that cycle less painful. Use a washable finish so routine cleaning does not burnish the surface. And keep a labelled container of the leftover, with the brand, colour and sheen written on it, because touch-ups only work when the colour and finish still match.
Kitchens, bathrooms and laundries: three to five years
Heat, cooking vapour, grease and regular wiping shorten a kitchen's interval, and the areas near the stove and sink age faster than the rest of the room.
Bathrooms and laundries face humidity and condensation, and their real limiting factor is ventilation rather than paint age. A bathroom with a working extractor can hold a coating for five years. One without will peel in eighteen months no matter what you spend.
Before repainting any wet room: check the fan actually works, fix leaks around fixtures, remove mould properly rather than covering it, let everything dry, and prime what needs priming. Repainting does not fix water coming through failed grout.
Ceilings and trim run on different clocks
Ceilings get touched by almost nothing, so seven to ten years is normal in a dry, well-ventilated room. Kitchen and bathroom ceilings are the exception and follow the walls beneath them.
Trim is the opposite. Skirting, architraves, door edges and window frames get bumped, cleaned, vacuumed against and handled constantly, and three to five years is typical. Chips around handles and scuffs along the skirting show up long before a wall looks tired.
Trim is also where a repaint changes a room most per dollar, because it carries the proportion of the space. Repainting the trim and leaving the walls often reads as a bigger change than the reverse.
Exterior walls: seven to ten years, elevation by elevation
Inspect each side of the house separately, because they will not be in the same condition. A shaded wall grows mildew. A sun-facing wall goes chalky and fades. Treating the exterior as one surface means either repainting three good elevations or leaving one to fail.
The warnings to act on are peeling, bubbling, a powdery residue on your fingers, exposed timber or masonry, rust staining, and open joints where the sealant has let go. Once any of those appear, the protective layer is already gone and you are on substrate damage time, not paint time.
Exterior timber and metal want more attention
Timber windows, fascias and exposed detail need repainting every three to seven years, because the moment the coating splits, water gets into the grain. Horizontal surfaces, end grain, cut edges and anything sitting under a leaking gutter go first. Eaves are sheltered and last longer, but they still stain and peel when there is a roof problem above them.
Painted metal runs five to ten, shorter near the coast or a pool. The important rule is to treat rust rather than cover it. Painting over active corrosion looks better for a season while the damage continues underneath. Remove the loose material, clean the salt off, treat, prime, then coat with a compatible system. The same honest-material thinking applies as when choosing durable outdoor materials in the first place.
Roofs: eight to fifteen years, and condition beats the calendar
Roof coatings last a long time and fail invisibly, because nobody looks at a roof from above. Sun, rain and airborne salt fade the colour and weaken the film gradually.
An inspection is looking for chalking, peeling, surface rust on metal, cracked or porous tiles, moss and lichen, loose ridge capping, damaged flashing and previous repairs done in an incompatible coating. Roof painting in Sydney and anywhere else with hard sun and coastal air sits at the shorter end of that range.
One thing worth being firm about: coating a roof does not fix a roof. Repairs come first, then cleaning and preparation, then paint. A coating applied over defects hides them for exactly as long as it takes for the next wet season.
Shared buildings need a plan, not a decision
In an apartment building or a townhouse group, common areas, facades, roofs and private boundaries often fall under different responsibilities, which is how repainting gets deferred until something is actively failing.
A staged program spreads the cost and the disruption, and it lets high-traffic common areas run on a three-to-five-year cycle while protected external sections run much longer. Where a building committee is involved, coordinated strata painting is mostly an exercise in agreeing colours and access before anybody quotes.
When to move it forward
A schedule is a planning tool, not a permission slip. Peeling, corrosion and water staining mean the barrier has already failed, whatever the calendar says.
Renovation brings it forward too. New windows, patched cracks, removed fixtures and replaced trim all leave a room that needs a coordinated finish rather than a patchwork, and that is usually the moment to revisit the colour rather than just matching what was there. If you are repainting anyway, it is worth spending the time on undertones — they are the hardest thing to get right and the thing that decides whether a colour works in your light. The palettes in this colour guide and the way saturated colour behaves in a Hollywood Regency room are both good places to start that thinking.
The short version
Interior walls five to seven years, trim and wet rooms three to five, ceilings seven to ten, exterior walls seven to ten by elevation, exterior timber three to seven, painted metal five to ten, roofs eight to fifteen.
Then ignore all of it the moment you see peeling, rust or a water mark, because at that point the paint has already stopped doing its job and you are no longer deciding when to redecorate. You are deciding how much of the thing underneath you are willing to lose.
