Sydney has no shortage of gyms. But when it comes to sheer scale, only a handful truly stand out.
Finding exact floor sizes is harder than it should be. Most gyms do not publicly advertise their total square metres, so the figures below are based on publicly available information, development applications, and confirmed reports where possible.
This list focuses on commercial gyms and private fitness clubs in Greater Sydney. Multi-sport aquatic centres are not included unless the gym floor itself is a major feature.
Here are the biggest gyms in Sydney right now.
1. HOUSED – Campus 2
Approx size: 8,500 to 10,000 m²
Location: Macquarie Park
HOUSED – Campus 2 is currently in a category of its own. At roughly 8,500 square metres with plans to expand closer to 10,000, it is widely recognised as the largest gym facility in Sydney and arguably Australia.
This is not just a weights floor. It is a full wellness campus with extensive strength and cardio zones, recovery facilities, and large training spaces. The facility combines traditional gym space with HYROX training floor, studios, saunas, wellness, pilates, and more. In pure size terms, nothing else in Sydney comes close.
Best for: Members who want scale, space, and a premium training environment.
2. Virgin Active Norwest – Baulkham Hills
Approx size: 4650 m²
Location: Baulkham Hills
Located in Norwest Business Park, Virgin Active Norwest is one of the largest full-service health clubs in Greater Sydney. The expansive layout combines a large open gym floor with dedicated strength, cardio and functional training zones, alongside multiple group fitness studios.
Unlike warehouse-style facilities, this club blends scale with premium amenities. Members have access to a 25 m indoor swimming pool, spa and sauna facilities, climbing wall, and dedicated recovery areas, making it more than just a traditional gym floor.
Its size, breadth of facilities, and resort-style layout place it firmly among the biggest gym facilities in Sydney.
Best for: Full-service training with pool, recovery facilities, and premium amenities in one of Western Sydney’s largest health clubs.
3. Camperdown Fitness
Approx size: 3,500 m²
Location: Camperdown
Camperdown Fitness is often cited as one of Sydney’s largest traditional strength gyms. At around 3,500 square metres, it offers a huge free weights area, extensive machine selection, and multiple training zones.
It has built a strong reputation among serious lifters who want room to train without compromise.
Best for: Heavy lifting and old-school gym atmosphere at large scale.
4. World Gym Moore Park
Estimated size: 3,000 to 4,000 m²
Location: Moore Park
World Gym Moore Park is frequently described as one of the biggest bodybuilding gyms in Sydney.
While exact square metres are not formally published, it is widely understood to exceed most standard commercial gyms in size. It features extensive plate-loaded equipment, a posing room, and large strength zones.
Best for: Bodybuilding and strength training in a high-energy environment.
5. One Playground Merrylands
Approx size: 3,000 m²
Location: Merrylands
One Playground Merrylands is one of the largest boutique style gyms in Sydney. At around 3,000 square metres across two levels, it blends premium design with serious floor space.
Unlike traditional warehouse gyms, this space includes multiple studio rooms, recovery areas, and structured class environments.
Best for: Members who want large scale with a polished, lifestyle feel.
6. Sporting Club of Sydney
Approx size: 3,000 m²
Location: Moore Park
Sporting Club of Sydney operates more like a private athletic club than a standard gym. The facility spans roughly 3,000 square metres and includes structured training zones, performance facilities, and premium amenities.
It is one of the largest high-end club style fitness spaces in the city.
Best for: Members seeking a premium club environment with substantial training space.
7. One Playground Haymarket
Approx size: 2,500 m²
Location: Sydney CBD
One Playground Haymarket is one of the biggest gyms in the CBD. It combines strength, cardio, classes, and recovery spaces within a large multi-zone layout.
For inner-city scale, it is hard to beat.
Best for: CBD professionals who want space without leaving the city.
8. One Playground North Sydney
Approx size: 2,000 m²
Location: North Sydney
One Playground North Sydney delivers a large, modern facility in one of Sydney’s busiest business districts. While smaller than the Merrylands flagship, it remains one of the biggest gyms on the north side.
Best for: North Shore members who want premium space.
9. World Gym Rouse Hill
Estimated size: 1,500 to 2,000 m²
Location: Rouse Hill
World Gym Rouse Hill is one of the largest gyms in the north west growth corridor. It features expansive strength areas and a large open training floor.
Best for: Western Sydney lifters wanting scale without travelling inward.
10. World Gym North Parramatta
Estimated size: 1,500 to 2,000 m²
Location: North Parramatta
World Gym North Parramatta rounds out the list as another major strength focused facility with a sizeable footprint relative to typical franchise gyms.
Best for: Western Sydney members looking for a large traditional gym.
Category Leaders
Largest Gym in Sydney Overall
HOUSED – Campus 2 Macquarie Park
Largest Traditional Strength Gym
Camperdown Fitness
Largest Bodybuilding Focused Gym
World Gym Moore Park
Largest Boutique Style Gym
One Playground Merrylands
Largest Gym in Sydney CBD
One Playground Haymarket
Final Thoughts
Most commercial gyms in Sydney sit between 500 and 1,200 square metres. Once you move past 2,000 square metres, you are entering a different tier entirely.
At present, there is a clear separation. One facility operates at mega-campus scale, a small group sit in the 3,000 to 3,500 square metre range, and the rest cluster below that.
If you are choosing purely on space, this list gives you a clear starting point. Bigger is not always better, but if room to move, equipment variety, and training zones matter to you, these are the heavyweights of Sydney’s gym scene.
Note: Sizes are provided as a guide to give a sense of scale across Sydney’s largest gyms.