Tradie Profile

Mainline Developments Pty Ltd

3.3 (38 reviews)

Carrum Downs, VIC

About this business

Mainline Building Group delivers medium- to large-scale property developments from site acquisition through to turnkey completion, specialising in multi-dwelling, medium-density residential projects across Eastern and South East Melbourne and the Mornington Peninsula. Their distinctive approach combines an in-house pool of expert tradespeople and rapid slab-to-completion delivery with services including feasibility, planning and compliance management to accelerate settlements and reduce holding costs.

Get in touch

Visit websiteCall (03) 9775 0666Email

Service areas

Servicing Carrum Downs and surrounding locations.

See what local homeowners are saying

  • PWPauline W19 Jan 2026

    We have been very, very impressed with the progress of our townhouse. Glen, the project manager has been exceptional directing all the many labourers that have occupied the site. Everyone we speak to...

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    We have been very, very impressed with the progress of our townhouse. Glen, the project manager has been exceptional directing all the many labourers that have occupied the site. Everyone we speak to is amazed how efficient, clean and progressive the site is. He should be highly regarded for his patience and skills. The building itself appears very well built and we are looking forward to a walk through soon. We would recommend Mainline to anyone and everyone. Excellent organisation.

  • FCFelicity C18 June 2021

    I purchased in Rosebud earlier this year ( 3 months ago I moved in) and I received the most lovely call from a woman named Rachel today. She called to make sure I was happy with my home and if I had a...

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    I purchased in Rosebud earlier this year ( 3 months ago I moved in) and I received the most lovely call from a woman named Rachel today. She called to make sure I was happy with my home and if I had any concerns, which I don't. I was honestly so amazed that the builder took the time to call me and have a chat, not many companies make you feel so valued anymore.

  • DPDiana P14 Nov 2024

    Dear Warranty Team (Kate, Adam, and Sayed), We are absolutely thrilled with the fantastic work you've done! Your professionalism and attention to detail are truly appreciated. Thank you for being so e...

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    Dear Warranty Team (Kate, Adam, and Sayed), We are absolutely thrilled with the fantastic work you've done! Your professionalism and attention to detail are truly appreciated. Thank you for being so easy to work with and for your prompt responses throughout the process. If we were ever to build a home, we wouldn't hesitate to reach out to you again.

  • SSStefani S25 Nov 2025

    We’re extremely happy with our home and the service that was provided by the team! Would recommend!

  • MHMichael H22 June 2021

    My wife and I purchased a townhome in the Santa Rosa development late last year and moved in mid June this year. We were excited by our purchase and the building journey which was greatly assisted by...

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    My wife and I purchased a townhome in the Santa Rosa development late last year and moved in mid June this year. We were excited by our purchase and the building journey which was greatly assisted by Ellie from Mainline. Better still, we had no disappointments when we moved in. Again thanks to Matt and Geoff, Mainline site managers, who guided us through our inspections and moving in. Definitely 10/10.

  • ESErnst S24 July 2019

    Fair volume builders. We built our home with them 12 months ago and so far it’s been good, with no major issues. Manager Bill was very helpful and understanding. Building can be a nightmare, so to hav...

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    Fair volume builders. We built our home with them 12 months ago and so far it’s been good, with no major issues. Manager Bill was very helpful and understanding. Building can be a nightmare, so to have a good builder and tradies who do a fair job is very important. Thanks Bill and team at Mainline for your efforts and hard work in building our home.

Frequently asked questions

How much do builders typically charge?
Builder costs vary widely depending on the job type and complexity. Minor repairs are generally much less than extensions, small builds or structural alterations that need foundations, framing or specialist input. Most quotes include a call‑out fee plus labour and materials, and the page shows live pricing to help you compare options.
Do builders charge call-out fees?
Call‑out fees are common and typically cover travel and an initial inspection or assessment. This fee is usually separate from hourly labour and materials, and after‑hours or weekend attendance often attracts higher rates. Ask whether a call‑out or minimum charge applies when requesting quotes.
Do builders need a licence in Australia?
Yes. Building work generally needs to be carried out by a licensed builder in every state and territory, and NSW builders are regulated by NSW Fair Trading. Builders should be able to provide their state builder/contractor licence number and show appropriate insurances and ABN/GST registration. In Victoria, domestic building insurance is required above a state threshold for certain contracts.
How do I get a quote from Mainline Developments Pty Ltd?
Mainline Developments Pty Ltd lists phone, email, or through their website on this profile, so you can contact them directly for pricing and availability. Share a short scope and photos to get a faster quote.
What areas does Mainline Developments Pty Ltd service?
Mainline Developments Pty Ltd services Carrum Downs and surrounds. Contact them to confirm service areas.
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