Secondary dwellings have become one of the most common building projects in Brisbane. Whether it is a new build in the backyard, a converted under-house area on a raised Queenslander, or a tired flat being made rentable again, the paint specification has an outsized effect on both how the space feels and how well it holds up.
A granny flat is small, usually gets less natural light than the main house, and often carries a tenant. All three of those facts should shape the paint decisions.
Colours That Make a Small Space Feel Larger
The single biggest lever in a compact dwelling is light reflectance value, or LRV — the percentage of light a colour bounces back into the room. Higher LRV means a brighter, more open-feeling space.
**Aim for LRV above 70 on walls in the main living area.** Warm off-whites and soft neutrals in the LRV 75 to 85 range give you brightness without the clinical flatness of pure white.
Reliable choices for Brisbane granny flats:
- **Dulux Natural White** — warm, forgiving, works under both natural and warm artificial light
- **Dulux Vivid White** — crisp and maximally bright, best where there is good natural light
- **Dulux Antique White USA** — slightly warmer, softens a small space without darkening it
- **Dulux Lexicon Quarter** — cool-leaning, pairs well with grey flooring and modern fixtures
**Paint the ceiling the same colour as the walls, or a quarter strength of it.** A hard white ceiling against a coloured wall creates a visual line that makes a low ceiling read as lower. Carrying the wall colour up removes that boundary and the room feels taller.
**Keep trim close to the wall colour.** High-contrast white trim chops a small room into segments. A trim in the same hue, one or two strengths up in sheen, is far more effective in a compact space.
Use one accent, not three. A single feature — the wall behind a bedhead, or the kitchenette splashback surround
Our Brisbane colour guide covers palette selection in more depth.
Specification for a Rental Granny Flat
If the flat will be tenanted, durability matters more than in an owner-occupied space. Tenants clean walls, move furniture and hang things.
Walls — Low sheen washable acrylic (Dulux Wash & Wear or equivalent). Flat paint looks lovely and is genuinely impractical in a rental; it burnishes when wiped.
Kitchenette and bathroom — A moisture-resistant, mould-inhibiting product. Brisbane humidity plus a small bathroom with limited ventilation is the classic mould scenario.
Trim, doors and window frames — Water-based enamel in satin or semi-gloss. It cleans easily, resists knocks, and unlike solvent enamel it will not yellow in a low-light room.
Ceilings — Flat ceiling white, or the quarter-strength wall colour in a flat finish.
Neutral, well-executed paintwork also shortens vacancy periods and supports a higher weekly rent, which is the actual financial argument for spending properly here.
Under-House Conversions
Converting the space beneath a raised Queenslander is common across Moorooka, Annerley, Yeronga and the southside generally. These conversions need extra care.
- **Moisture management first.** Test for rising damp and confirm subfloor drainage before any coating goes on. Paint will not fix a moisture problem, it will just peel.
- **Masonry sealer on block walls.** Bare besser block and concrete need a dedicated sealer or the topcoat soaks in unevenly.
- **Mould-inhibiting products throughout.** Under-house spaces are cooler, darker and more humid than the rest of the house.
- **Anti-condensation or insulating coatings** are worth considering on cool concrete walls that sweat in summer.
What It Costs in Brisbane
Indicative 2026 pricing for a typical one-bedroom granny flat of 45 to 60 square metres:
- **Interior only, walls, ceilings and trim** — $2,800 to $4,500
- **Interior plus exterior of a detached flat** — $5,000 to $8,500
- **Under-house conversion including masonry sealing and moisture prep** — $3,500 to $6,000
Variables that move the number: ceiling height, extent of repair and preparation, number of doors and windows, and whether you are recoating in a similar colour or covering a dark existing scheme (which needs an extra coat).
Model your own project with the interior painting cost calculator, or read the full 2026 Brisbane cost guide.
Exterior Considerations for Detached Flats
A detached granny flat is a small building with full exposure. It needs the same climate-rated system as the main house: proper preparation, a sealer, and two UV-stable topcoats. Matching the main dwelling colour scheme is usually the right call for resale, though a deliberately complementary rather than identical scheme can work well on larger blocks.
Do not neglect the small stuff — the entry door, the meter box, the step nosings and any steel posts. On a compact building those details are a large share of what people actually see.
Book a Granny Flat Quote
Tier 1 Painting handles new-build secondary dwellings, under-house conversions and rental refreshes across Brisbane. We are QBCC licensed and fully insured, and every quote is itemised on site. Book a free inspection or explore our interior painting service.
