Cahill is the Mornington Peninsula's only premium Design and Construct builder. One trusted hand holding your brief, your budget and your build, from the first conversation to the day you move in. .

A bit about us

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Breakdown of our services

Home design & Construction

One team from concept to completion, under one roof. Cahill’s custom home design and build service means your design, your budget and your builder are aligned from day one, so the home you imagine is the home you get. No handballing, no surprises, no gaps for things to fall through.

Architect & Interior
design collaboration

Your architect’s vision, built without compromise. Cahill has spent fifteen years working alongside the Peninsula’s leading architects and interior designers, and knows how to protect design intent through every stage of construction. Bring your own team, or let us introduce you to ours.

Residential Development

Development experience most builders don’t have. With more than a 110 completed projects on the Mornington Peninsula, Cahill understands feasibility, site selection and end value as well as construction itself. It means Cahill can make sense of your block before a single line is drawn, with sharper advice, cleaner numbers and homes that hold their worth.

Aftercare and Client Support

Handover is a milestone, not a goodbye. Every Cahill home comes with a complete digital record of the build and a direct line to the people who built it. When you call, we answer, because our name is on your home.

Cahill Building Group started on the tools

Founded in 2011 by brothers Jono and Steve Cahill, the business grew the way the best ones do: slowly, properly, and on reputation alone. Jono came up through carpentry before becoming a registered builder. Steve built the relationships with the architects, designers and agents who shape the Peninsula’s best streets. They built townhouses first, then their own family homes, then more than thirty projects across the Mornington Peninsula. Building your own home teaches you what clients actually feel: the weight of every decision, and the value of a builder who tells you the truth.

Our Projects

The People Behind the Projects

"Professional, client focused, straight talking and attention to detail. No detail was too small and their willingness to accomodate our ideas into their professional designs and finishes was a pleasure to work with."

Mark Norman
Mornington 2023

"Building a house should be stressful… but somehow they made it fun. They held our hand through every step, kept things calm, and gently reined me in when my champagne taste tried to run away from the budget. No judgement, just smart solutions and a lot of patience."

Fleur Ingram
Mount Martha 2023

Ready to build on the Peninsula? Let’s get the conversation started

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