About Our Team
Who We Are
KM Custom Homes is led by builder Karl Melkus, whose approach is grounded in care, consideration and a genuine passion for the work. For Karl, it’s never just about building houses—it’s about the process, the detail, and the satisfaction that comes from bringing something meaningful to life.
With over 30 years of experience, Karl is deeply involved in every project, working closely with clients to understand how they want to live and what matters most to them. He enjoys the challenge each home brings — solving problems, refining ideas and finding the right way to bring everything together. It’s this hands on approach that ensures every home feels thoughtful, resolved and truly personal.
Independent Construction Expertise Built on Real World Experience
With decades of hands on building experience working directly in residential construction, we recognised a consistent issue. Most clients are asked to make significant financial decisions without clear, independent guidance on cost, buildability or risk.
At KM Custom Homes, we are no longer focused solely on delivering builds. Our role has evolved to working alongside homeowners and investors to bridge the gap between design intent and real world construction outcomes, helping you avoid costly mistakes before and during your build. We provide independent pre-construction advice and client side project management for homeowners and investors who want clarity, control and confidence throughout their building journey, helping clients understand what is realistically achievable before they commit to a build.
We act on your behalf during construction to help manage the process, protect your interests and provide experienced oversight from a builder’s perspective. This is not a builder management service — it is independent client representation.
Who We Help
- Homeowners planning renovations or extensions
- Clients building custom homes
- Investors and developers seeking early stage feasibility input
- Clients who want independent oversight during construction
Homeowners and investors who want:
- Clear, realistic construction budgets before committing
- Confidence that their design is buildable
- Independent oversight during construction
- Protection from cost blowouts and variations
- An experienced builder on their side, not just the contractors
What We Do
Not only do we build, we plan, design and provide practical construction insight to help you make informed decisions from your first vision. By bridging the gap between high level architecture and on site reality, we ensure your project is buildable, beautiful and budget conscious before the first shovel hits the ground. Our process removes the guesswork, giving you a clear roadmap from your initial idea to the day you move in.
- Concept cost planning and budget alignment
- Buildability and compliance review
- Risk identification (site, design, structure, constraints)
- Design adjustments to control cost and improve outcomes
- Feasibility assessment
We act independently on your behalf throughout the build process, ensuring your interests are protected at every stage:
- Builder selection and tender review
- Program and timeline oversight
- Site progress and quality monitoring
- Variation and cost control management
- Regular reporting and communication
- A more controlled, transparent and accountable build process
For clients who need experienced input without full project management:
- Builder or quote reviews
- Stage based construction advice
- Variation and dispute assessment
- Build troubleshooting and guidance
Frequently Asked Questions
Do I need my own plans or do you provide them?
We offer complete flexibility. You can bring your own architect-designed plans for us to quote and build, or you can use our in-house "design & build" service.
Can I choose any materials or fixtures I want?
Yes. Unlike volume builders with "standard" ranges, we have no predefined catalogues. You have 100% control over every finish, from bespoke timber joinery to high-end imported stone. We partner with premium suppliers to source unique materials that reflect your personal style.
How do you handle difficult or sloping blocks?
We specialise in site-responsive design. Instead of forcing a "flat" plan onto your land, which often leads to massive retaining costs, we design the home to follow the natural topography. This approach minimises site disturbance, maximises views and natural light.
Do you provide quotes?
Not only do we provide quotes, we provide independent feasibility and cost guidance, unlike standard builder quoting where the details are too often left out.
How do you prevent budget overruns?
Our quotes are very detailed and rarely run over budget. Where certain parts of the works are uncertain, we provide fair and reasonable estimates called provisional sum allowances before any contract is signed. For items not yet selected, we use realistic "prime cost" allowances rather than low-ball figures to ensure your final bill matches your expectations.
What is the difference between a fixed price contract and a cost plus contract?
Fixed Price — best for budget certainty. We agree on a total lump sum upfront. The risk of material price rises generally stays with us, though it requires all selections to be finalised before signing.
Cost Plus — highly transparent and flexible. You pay the actual cost of materials and labour plus a set builder's margin. This is ideal for complex builds where it's difficult to price everything at the start, or for clients who want to make many changes as the project evolves.
How long does the pre-construction phase take?
The pre-construction phase (design, engineering, and council approvals) typically takes 3–12 months. Custom homes require more meticulous planning and paperwork than standard designs to ensure every unique detail is approved and build-ready.
What is the average construction timeline?
A typical custom home takes between 10 and 18 months to build, while simpler builds can be finished in 7–10 months. The higher the level of detail, quality, craftsmanship, and unique materials involved requires a more deliberate, unhurried pace.
How often will I receive updates?
We keep you informed with regular, proactive updates from start to finish. Every project moves at its own pace, so we tailor the frequency of communication to suit the stage of construction and your preferred level of involvement. Our goal is to ensure you always feel up to date and confident about the progress.
When should I engage you?
As early as possible. Once you have a vision for your project and a rough budget in mind, it's the perfect time to get in touch. A quick phone call early on allows us to provide practical guidance and ensure you're heading in the right direction from the very start.
