Planning a Custom Home or Duplex in Sydney?

Build your custom home or duplex with a director-led builder who guides you from early feasibility through to completion. With direct involvement from Director Lachlan McDonald at every stage, you'll benefit from clear communication, quality craftsmanship and a personalised building experience.

Explore Our Work
Lachlan McDonald, Director of Caton Constructions, overseeing custom home and duplex projects across the Sutherland Shire.
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What Type of Project Are You Planning?

Whether you're planning a custom home, duplex or residential development, we'll help you understand the best path forward for your project.

Bright living room with beige sofa, round wooden coffee table, and sliding glass door opening to a backyard patio with outdoor dining furniture and lush greenery.

Duplex Builds

Duplex builds require careful planning, coordination, and experienced site management. Caton Constructions works with homeowners, developers, and consultants across the Sutherland Shire and Southern Sydney to deliver well-managed duplex and dual occupancy projects across Sydney. From early planning through to completion, every stage of construction is carefully coordinated to ensure a smooth and professionally managed building process.

  • Every site is different. Factors such as zoning, site dimensions, access and planning controls all influence development potential. We can help assess your site and identify the opportunities and constraints early.

  • Early involvement allows us to provide practical construction advice, assist with budgeting and help ensure the project is designed with buildability and efficiency in mind.

  • Your project is overseen by Director Lachlan McDonald, providing direct communication and accountability from the initial discussions through to handover.

View Recent Projects
Modern white two-story house with large glass windows and arched openings, illuminated from within, featuring stairs visible through the front door, surrounded by a gravel pathway and small desert plants, with neighboring houses on either side and a blue evening sky in the background.

Custom Home Builds

Building a custom home starts long before construction begins. We work with homeowners across the Sutherland Shire and Southern Sydney through the planning, feasibility and construction stages to deliver homes tailored to their site, lifestyle and goals.

  • The earlier the better. Engaging a builder during the planning stage can help identify potential challenges, improve buildability and provide more accurate budgeting before construction begins.

  • No. Many clients speak with us before plans are finalised so we can provide guidance on feasibility, budgeting and the next steps required to move the project forward.

  • Your project is overseen by Director Lachlan McDonald from planning through to completion, ensuring clear communication and consistent oversight throughout the build.

View Recent Projects

Additional Services & Consultancy

We provide consultancy and specialist construction services, working alongside homeowners, architects and consultants from the early planning stages through to construction. Our collaborative approach helps ensure every project is practical, well coordinated and ready to build.

  • If you're looking to improve or expand your existing home, we can help with selected alterations and additions. We'll take the time to understand your goals, carefully plan the project and manage every stage with the same clear communication, quality workmanship and director-led approach we bring to all Caton builds.

  • If you're planning a commercial or institutional project, we can provide the same structured approach, clear communication and quality workmanship that define our residential builds. We'll work closely with you throughout the project to help ensure a smooth and well-managed construction process.

  • If you're still in the planning stages of your project, we can provide practical advice before construction begins. Working alongside you, your architect and your consultants, we'll help review buildability, identify potential challenges early and ensure your project is well prepared for construction.

  • If you're planning a hospitality or commercial fit-out, we'll work with you to create a space that's practical, well-built and tailored to your operational needs. Every project is carefully coordinated and managed with a focus on quality workmanship, communication and attention to detail.

  • If you're planning a medium-density residential development, we'll work closely with you and your consultant team from planning through to construction. Our focus is on practical solutions, careful coordination and quality workmanship to help deliver a well-managed project from start to finish.

How We Work With You

Visual infographic summarizing five project management steps: 1. Discovery Call with an icon of a person with a speech bubble, explaining initial conversation to understand project goals and requirements. 2. Site & Feasibility Review with an icon of a person with a helmet, assessing site, project requirements, and constraints. 3. Proposal with an icon of a hand holding a document, preparing a detailed project proposal based on gathered information. 4. Engagement with an icon of a handshake, formalizing engagement and setting communication frameworks. 5. Project Delivery with an icon of a handshake and house, managing construction to project completion with quality controls and ongoing involvement.
Visual infographic summarizing five project management steps: 1. Discovery Call with an icon of a person with a speech bubble, explaining initial conversation to understand project goals and requirements. 2. Site & Feasibility Review with an icon of a person with a helmet, assessing site, project requirements, and constraints. 3. Proposal with an icon of a hand holding a document, preparing a detailed project proposal based on gathered information. 4. Engagement with an icon of a handshake, formalizing engagement and setting communication frameworks. 5. Project Delivery with an icon of a handshake and house, managing construction to project completion with quality controls and ongoing involvement.
Map showing Caton Constructions' service area across the Sutherland Shire and Southern Sydney.

Where We Build

Caton Constructions works across Southern Sydney, including the Sutherland Shire, St George, Eastern Suburbs and surrounding areas. If you're unsure whether your project falls within our service area, we'd be happy to discuss it.

Key areas include:

• Sutherland Shire
• St George
• Canterbury Bankstown
• Inner West (including Marrickville and Concord)

• South Sydney
• Eastern Suburbs
• Northern Suburbs
• Lower North Shore

What Our Clients Say

  • "I was so impressed by Caton Construction’s ability to handle our new home build project from start to finish. Not only did he explain every part of the process in simple terms, but he also made sure the project was completed with attention to detail. The quality of the construction is fantastic, and I’m thrilled with the final result. The communication was always open, transparent, and consistent, and the project stayed within budget, which is rare in this industry. I couldn’t be happier with how everything turned out".

    Mark B - Barden Ridge

  • “We recently had an extension built, and from the beginning, Lachy was fantastic! He explained construction terms in language that made me and my wife feel comfortable to make choices we fully understood. The quality of the build is great, it looks fantastic and we can see the attention to detail in the final result. Everything was kept tidy during the build and it finished ahead of schedule and within budget too. I would definitely recommend him to anyone.”

    Daniel T - Gymea

  • “Working on our extension with Lachlan from Caton Constructions was an absolute blast! He made the whole process feel like a team effort, walking us through every step and always making sure we were on the same page. The quality of his work is top-notch, and the attention to detail is something you rarely see. He stuck to the timeline and budget without a hitch—no surprises here! On top of that, he's super approachable and just a great person to work with. We couldn’t be happier with the final result and would highly recommend him to anyone in Southern Sydney!.”

    Aaron S

  • I’ve worked with builders before, but none have been as approachable and transparent as Lachlan. He always made time for me if I had questions or concerns, and prioritized keeping me informed at each stage. Lachlan went above and beyond in the design stage, making sure I was happy with each choice and suggesting products that tied in with my coastal theme. The final product is stunning, with the highest quality finishes, and best of all it stayed within budget. I highly recommend using Caton for any projects, and will certainly be using them again for our next build.

    Hannah M - Engadine

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10 Questions Every Sydney Homeowner Should Ask Before Choosing a Builder

Caton Constructions ebook 10 Questions Every Sydney Homeowner Should Ask Before Choosing a Builder

Building can come with a lot of uncertainty around costs, timelines, communication, and responsibility. This free guide is designed to help take some of that uncertainty out of the early stages by outlining the key questions worth asking before choosing a builder.

Inside, you’ll find practical guidance to help you compare builders properly, understand how decisions are managed, and feel more confident moving forward — without rushing or feeling overwhelmed.