Southern Highlands, Illawarra & Shoalhaven Air Conditioning, Solar & Batteries, Electrical & More

Simmark is the leading multi-service contractor in the Shoalhaven, Illawarra and the Southern Highlands. Our team of experienced & qualified local tradesmen provide a complete range of professional services. The different facets of our business include air conditioning, electrical, solar & batteries, data & communications, security installations and plumbing (Shoalhaven & Illawarra only).

We have been in business for over 22 years and believe our unique combination of expert workmanship and friendly service make our technicians the best in the local area. With bases in Wollongong, Nowra and Mittagong, we have a wide service area that covers all of the Shoalhaven as well as the Illawarra and Southern Highlands. Just some of the town we regularly visit include Bowral, Moss Vale, Berry, Ulladulla & Kangaroo Valley.

Latest News

Simmark Solar Analytics Winner

Congratulations to our Berry Small Farm Field Days Simmark Solar Analytics monitor winner! Keith Roberts of Broughton Vale had his new solar monitor installed by Jeremy our Simmark technician this morning. We are also delighted to announce our Home and Garden Show...

Is it Time to Replace your Air Conditioner?

Summer is upon us and it's time to plan ahead to ensure your air conditioning system is up for the job ahead. How did your air conditioning system perform through the long hot days, last Summer? Reliable and efficient or unreliable and expensive to run? Talk to the...

Sustainable House Day Sunday 16th Sept

It's Sustainable House Day​ this Sunday and the greenest homes across Illawarra will be open to the public! Simmark Wollongong​ is proud to support this event and will be conducting a FREE tour at one of the homes located at 12 Brissendon Close, Tarrawanna at 10am...


Great Job Team Simmark with our solar power and Tesla battery install. saving $4k PA + the security of backup power whenever there’s a blackout. A fully professional team, prompt support and impressive result.

Mike J.

I contacted Simmark regarding a solar system having been let down by another supplier. It was like chalk and cheese. Upfront service was fast and professional and the work was carried out by many employees all of whom were the most respectful bunch you would wish to have at your home. Our new panels were great but the Tesla powerwall 11 is the bees knees!

Muddy D.

They’ve helped set up many aspects of our farm, and have done a great job! They are always polite and helpful, and they do very neat and thoughtful work. Their pricing is transparent and reasonable. Highly recommended.

James R.