At a Glance
Ventilation and exhaust fan installation in Brisbane typically costs $200–$1,350 per job. A basic bathroom fan replacement using existing ducting and wiring sits at the low end. Multi-room extraction with new ducting, kitchen rangehood ducting through external walls, and subfloor ventilation push toward the top.
What's Included in the Price
- Supply and install of the exhaust fan (ceiling, wall, or inline type)
- Ducting from the fan to an external discharge point (roof cowl, soffit vent, or wall grille)
- Electrical connection or switch wiring, compliant with AS/NZS 3000 Wiring Rules
- Roof, soffit, or wall penetration with weatherproof sealing
- Extraction capacity sized to meet AS 1668.2 Ventilation Design minimums
- Testing and commissioning
Materials are typically 20–30% of the total. Labour, ducting complexity, and the number of penetration points drive the rest. Brisbane's generally accessible timber-frame construction keeps labour time lower than in cities dominated by masonry.
What Affects the Cost
- Fan type and capacity. Basic ceiling-mounted bathroom fans are inexpensive. Inline fans mounted in the roof space are quieter, can serve multiple rooms, and are well-suited to Brisbane's open-plan renovations. High-extraction kitchen fans for ducted rangehoods cost more.
- Ducting requirements. Where ducting already exists and runs to the outside, a fan swap is quick. New ducting runs through roof spaces add time and materials. Rigid or semi-rigid ducting costs more than flexible foil but resists sagging in Brisbane's heat and lasts significantly longer. Flexible foil ducting in hot roof spaces deteriorates faster than in cooler climates.
- Number of rooms. Single bathroom extraction is straightforward. Adding fans to a second bathroom, ensuite, and laundry means multiple duct runs and discharge points.
- Construction type. Brisbane's timber-frame and weatherboard housing stock is generally easier to work with than brick or masonry. Newer rendered block construction in some suburbs requires cutting through block walls for external vents.
- Roof access and type. Most Brisbane homes have accessible roof spaces with reasonable clearance. Skillion roofs and low-pitch designs in newer builds can be tighter. Metal roofing is simpler to penetrate than tiles.
- Kitchen rangehood ducting. Ducting a rangehood to the exterior adds a significant penetration and duct run. In many Brisbane homes, ducting through the soffit or eaves is simpler than going through the roof, but requires proper sealing against rain and pests.
- Subfloor ventilation. Queenslander houses and other raised-floor homes may need subfloor ventilation fans to address dampness and musty air under the house. This is a separate scope from ceiling-level extraction.
A simple bathroom fan replacement with existing ducting and wiring sits toward $200. Installing exhaust fans in multiple bathrooms with new ducting to the roof, a ducted rangehood through an external wall, and subfloor ventilation fans in a Queenslander pushes toward $1,350.
Brisbane-Specific Considerations
Brisbane's subtropical climate makes effective ventilation more critical than in any other Australian capital. Humidity regularly exceeds 70% in summer, and even in winter, ambient moisture levels are higher than Sydney or Melbourne. Bathroom mould is extremely common in homes without properly ducted exhaust fans, and once established, it returns quickly unless the underlying ventilation problem is fixed.
The classic Queenslander presents specific ventilation needs. These raised timber homes were originally designed for natural airflow — high ceilings, wide verandahs, and open subfloor spaces. Over the decades, many have had their subfloor areas enclosed with skirtings or landscaping that blocks air movement, creating damp, musty conditions underneath the house. Subfloor ventilation fans can restore airflow, but this is a different scope from bathroom or kitchen extraction.
For bathroom ventilation, Brisbane's warm climate means flexible foil ducting in roof spaces degrades faster than in cooler cities. The combination of high roof temperatures and humidity accelerates deterioration of foil tape joints and the foil itself. Rigid or semi-rigid ducting is a better long-term choice, even though it costs more to install.
Open-plan kitchen-living areas are standard in Brisbane renovations and newer builds. Without a properly ducted rangehood, cooking moisture and fumes spread through the entire living space. If you have a gas cooktop, the National Construction Code requires external ducting — a recirculating rangehood is not compliant. Many Brisbane homes can duct through the soffit or eaves rather than the roof, which avoids a roof penetration in a city that gets heavy summer storms.
Brisbane's metal roofing, common on both older and newer homes, is generally simpler to penetrate and seal than tile roofing. A roof cowl installation on a metal roof is faster than on tiles, where surrounding tiles must be carefully lifted and replaced.
Hiring a Licensed Air Conditioning Technician in QLD
In Queensland, all electrical work must be performed by a licensed electrical contractor or licensed electrician. Ventilation installations that involve hardwired fans, new circuits, or switch wiring fall under this requirement. Licences are issued through the QBCC (Queensland Building and Construction Commission).
The electrician must provide an Electrical Safety Certificate on completion of the electrical work. This is your proof the installation meets AS/NZS 3000 requirements.
For the ducting and fan selection component, there is no separate ducting licence in Queensland, but the installer should understand AS 1668.2 extraction rate requirements and be experienced with residential ventilation. Many Queensland electricians also handle the ducting work, especially for straightforward bathroom fan installations.
You can verify a QBCC licence number on the QBCC website. Ask for both the licence number and the Electrical Safety Certificate before making final payment.
How We Calculate
Estimates are based on surveyed trade rates for licensed electricians and air conditioning technicians in the Brisbane metro area, adjusted for property age. All prices include GST. Figures cover standard residential exhaust fan and ventilation work. Commercial extraction systems, ducted air conditioning, and whole-house ventilation systems are not included.