A Place That Grew With the Community: Thornleigh’s Brickpit Story

If you visit Thornleigh today, the Brickpit Park area looks like a lively community hub. Kids race across the playground, teenagers practise tricks at the skate park, basketball games echo from the indoor stadium, and families spread picnic blankets across the grass.

But a little over a century ago, the scene was very different.

Where families now relax and play, there was once a huge industrial pit producing bricks for a growing Sydney. The story of the Thornleigh Brickpit is actually a great example of how places can change dramatically over time — and how a former industrial site can turn into something the community enjoys every day.

When Thornleigh Helped Build Sydney

The story begins in 1901, when the National Brickworks started operating in Thornleigh. The area’s clay soil made it ideal for brickmaking, and workers dug clay directly from the ground to produce bricks used across Sydney.

Early kilns at the site fired thousands of bricks every week. By 1903 a large kiln with a 45-metre chimney stack had been built, producing around 140,000 bricks each week.

At the time, Sydney was expanding rapidly. New suburbs, railway lines and buildings all required huge quantities of bricks, and places like Thornleigh played an important role in supplying those materials.

The brickworks operated for decades. As clay continued to be excavated, the pit grew larger and larger. Eventually the site became enormous — reaching over 200 metres wide and about 90 metres deep.

You could say Thornleigh literally helped build parts of Sydney.

The End of the Brickworks

By the 1960s and early 1970s, things began to change.

Clay reserves in the area were running low and brickmaking was becoming less viable. Eventually the brickworks closed, with the last bricks fired in 1975.

The large kilns and industrial structures that once dominated the area were eventually demolished. Local spectators even gathered to watch the tall brick stacks being dynamited during demolition — something that would definitely draw a crowd today.

But the closure left behind one very obvious problem.

There was now a giant hole in the ground.

The Slightly Less Glamorous Chapter

For a short period, the future of the pit was uncertain. Eventually a decision was made to convert the site into a landfill facility.

In 1981 the pit officially became a rubbish tip, accepting waste from surrounding areas.

It wasn’t exactly a tourist destination at the time.

The landfill only operated for a few years before closing in 1985. Because decomposing waste produced methane gas, special gas burners were installed to safely release the gas.

So yes — the place where kids now zoom down a flying fox once had methane gas burners sticking out of the ground. Not quite the playground vibe we see today.

Luckily, the story didn’t end there.

A Huge Transformation

After the landfill closed, the site was gradually rehabilitated and plans were made to turn the area into something far more positive for the community.

The result was Brickpit Park, which opened in 2006 after major redevelopment of the site.

Instead of an industrial landscape, the area was redesigned as a recreational space for local residents.

Today it’s hard to imagine the site’s industrial past when you see children playing, sports teams training and families enjoying the park.

What You’ll Find at the Brickpit Today

The Brickpit area is now one of the largest recreation hubs in the Hornsby area.

One of the main attractions is the Thornleigh Brickpit Indoor Sports Stadium, which hosts basketball, volleyball, table tennis and other community sports. Thousands of residents, schools and local clubs use the stadium every year.

Outside the stadium, Brickpit Park has become a favourite weekend destination for families. Some of the popular features include:

A large playground with climbing structures and a flying fox

A skate park for scooters, skateboards and BMX riders

Picnic areas and open green space

Thornleigh Golf Centre with a driving range and mini golf

New play features like a ninja-style obstacle course and water play area for kids

The playground design even includes small touches that reference the site’s history, including displays of heritage bricks from the old brickworks.

It’s a nice reminder of what the area once was.

Why People Love Visiting

Today, the Brickpit has become one of those places locals regularly recommend when someone asks:

“Where should we go this weekend?”

Families visit for the playground, teenagers head to the skate park, and sports teams fill the indoor courts in the evenings. Others simply stop by for a walk or a relaxed afternoon outdoors.

It’s also a great example of how communities can transform old industrial land into something new.

After all, not many playgrounds can say they were once a 90-metre-deep brick factory… and later a landfill.

Thankfully, these days the Brickpit is known for something much better — a place where the community can gather, play and enjoy the outdoors.

And that’s quite a transformation.