Top Notch Roofing WA

Greg O'Sullivan is your local metal roofing expert with over 12 years' experience. He offers top quality workmanship, new roofs, re-roofs, repairs and more. He is honest, reliable and will always go the extra mile for his customers. He can also supply and install Whirlybirds.

Little Aussie partner since

Free Whirlybird with all metal re-roofs when you mention Little Aussie.

Your local metal roofing and guttering expert

Greg O’Sullivan is the owner/operator of Top Notch Roofing WA and is your local expert when it comes to metal roofing, guttering and downpipes. He has over 12 years’ experience and prides himself on excellent workmanship and customer service.

Great customer service

From quoting to completion, Greg takes care of the whole process, so you’re not having to deal with lots of different people along the way. If he misses your call, he will get back to you within a few hours and will always come out to your home to do a quote, whether the job is large or small.

He is friendly prompt and reliable and really looks after his customers. If you are happy then so is he, which is why he gets so many word-of-mouth referrals.

Help and advice

Greg is very easy to talk to and is happy to offer help and advice. He can chat to you about different colours and the insulation properties of different products. He works with both Colorbond and zincalume.


  • New metal roofs
  • Metal re-roofs
  • Gutters & downpipes
  • Whirlybirds
  • Metal fascia replacement
  • Residential & commercial

Don’t risk a fall, call Top Notch Roofing

Home handymen are suffering serious head and neck injuries in growing numbers as they ignore their personal safety while doing DIY roof repairs.

Whether your metal roofing and guttering problem is large or small, it’s best to call in the professionals. Greg has the equipment and expertise to check everything out and deal with any issues. It will be the best decision to save you time, hassle and the very real risk of serious injury from falling off your roof.


  • New metal roofs
  • Metal re-roofs
  • Gutters & downpipes
  • Whirlybirds
  • Metal fascia replacement
  • Residential & commercial

Update your home with a stylish new metal roof

A stylish, new Colorbond or zincalume roof looks great, is low maintenance and will add value to your home. Greg will take care of the whole process from start to finish, so you don’t have to worry about a thing. He can also give you professional advice on colour choices and the insulation properties of the different options available.

Look after your metal roof and protect your home

Looking after your roof means protecting what is probably your most expensive asset, your home. A call to Greg can stop those small metal roofing problems from turning into big, expensive ones. He prides himself on his top-quality workmanship and offers the best possible service, which includes always being up-front and honest with his customers.

Gutters and downpipes

Your gutters and downpipes are designed to direct water away from your home and prevent damage, so it’s important that they are in good condition and working effectively. If they are starting to rust then it may be time for repairs or replacements. Greg can take a look and give you honest advice, making sure your home is protected.

A Whirlybird is the cost-effective way to cool your home

WA is well-known for its long, hot summers. Top Notch Roofing WA can help you to keep your house cooler this summer and reduce your energy cooling costs by installing a Whirlybird. It works by creating a vacuum, sucking out warm air from inside your roof cavity.


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01 Jan 2022

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Metal Roofing & Guttering Services

We're still looking for that one local business to join Little Aussie's recommended business network. So to help you in the meantime, here are a few businesses near your home that you can choose from.