At Blaise Building Services, we believe in improving the living conditions of every human and looking after the planet by providing a healthier environment through high performance construction. Our aim is to make healthier, more economical and sustainable homes the new norm.
Blaise Building Services provides straight answers to our most common Passive House builder and custom home builder FAQs in Sydney. From understanding how much a Passive House costs to clarifying how long it takes to build a custom home in Sydney, we believe in complete pre-construction transparency.
Ready to start? Book your On-Site Feasibility Study with Stephane. One hour on-site. No obligation. Full audit of your property, your goals, and your build viability.
Pre-construction & approvals phase
On-site construction average
Over code-minimum builds — once only
Reduction in heating & cooling demand
The pre-construction phase determines the outcome of your entire project. Every week of clarity saved here is a month of risk removed from the site.
Resolving details on paper first is the single most effective way to protect your timeline.
On average, a custom Passivhaus project requires four to eight months for the pre-construction, cost-modelling, and approval phase, followed by twelve to eighteen months for on-site construction. Resolving every material specification on paper before site preparation begins is the single most effective way to protect your timeline.
Yes, high-performance homes are subject to the same local council DA and CC approval processes as standard residential construction. We manage this entire architectural documentation and approval process on your behalf to ensure compliance with local controls.
“Pay once to secure the envelope. Remove the recurring cost of running and cooling a draughty home forever.”
— Stephane Blaise, Director
The construction cost per square metre is typically 5% to 15% higher than for code-minimum conventional builds due to premium components such as airtight membranes, heat-recovery ventilation, and triple glazing. Our Quick Building Estimate (QBE) provides transparent, itemised cost-modelling of your specific drawings during the design stage.
No, because a certified building envelope reduces your heating and cooling energy demand by up to 90%, virtually eliminating utility costs. By paying once at the start to secure the structural envelope, you remove the recurring costs of running and cooling a draughty home.
Certified performance is not claimed — it is physically measured and documented before we hand you the keys.
We refuse to use cheap, unverified materials on our building envelopes. We standardise premium vapour-control membranes, specialised sealing tapes, and high-performance thermally broken timber or uPVC double- and triple-glazing for every custom project.
We conduct a physical Blower Door Test at completion to measure air changes per hour, which is a mandatory requirement for formal Passive House certification. This test provides documented, certified proof of your building's structural integrity and energy efficiency prior to handover.
Three independent Blower Door Tests — conducted at each critical stage of construction to catch air leaks when they are cheapest to fix.
You should never have to chase your builder for updates. Our systems keep you informed without lifting a finger.
We use our Early Construction Involvement (ECI) process to review your architect's plans during the early design stage. Catching detailing bottlenecks and cost overruns on paper, before drawings are submitted to council, prevents expensive late-stage variations.
You receive daily site photos, real-time schedule tracking, and financial progress claims through our cloud-based WunderBuild client portal. You can see exactly who is on-site and what is happening on your property on any device.
Do not let unresolved technical or financial queries delay your project's planning phase. Schedule a detailed, diagnostic FAQ consultation with Stephane Blaise today to get direct, honest answers tailored to your specific site, budget, and construction goals.
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