Blaise Building Services — Coogee Passive House

Our Brand Value

Why Choose Blaise Building Services: Your Partner in Meticulous Construction

If you are planning a high-performance custom home in Sydney, why choose Blaise Building Services comes down to precision. We are a detail-driven builder specialising in certified Passive House expertise, ECI budget alignment, and construction quality that is physically tested on site.

We partner with architects early to eliminate cost overruns and deliver healthy, mould-free homes.

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.

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Our Standard

A Different Standard of Custom Construction

Most Sydney builders construct to the minimum requirements of the National Construction Code, which we treat as a structural floor rather than a quality standard. Discerning Eastern Suburbs clients hire us because they expect their home's physical performance to match its architectural design.

We are Sydney's best Passive House builder for property owners who require absolute certainty. We do not participate in competitive bidding; instead, we focus our energy on detailed early-stage collaboration to ensure your home performs exactly as designed.

No competitive tendering

Early architect collaboration

Blower Door Test on every build

Certified Passivhaus standards

Eastern Suburbs specialists

Premium European finishes

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Blaise Building Services — high performance construction

How We Work

Six Operational Systems for Your Project

Our custom building practice is structured around six disciplined systems to protect your timeline, your budget, and your structural quality.

Local Building Experience

Stephane Blaise brings over 20 years of hands-on construction experience to your project, ensuring local council planning controls, geotech constraints, and high-wind coastal conditions are managed smoothly.

Early Cost Transparency

Through our Quick Building Estimate cost-modelling process, we provide transparent cost modelling during the design stage to keep your budget and your drawings on the same page.

Meticulous Carpentry Standards

We maintain extremely high expectations for structural precision, treating airtight membrane installation and framing with the same attention to detail as final premium finishes.

Certified Passivhaus Expertise

Our team of certified Passive House tradespeople and consultants understands building science, ensuring your building envelope is insulated, airtight, and properly ventilated to prevent mould.

Total Project Visibility

Our cloud-based WunderBuild portal gives you daily access to site schedules, progress photos, and financial tracking on any device, eliminating communication gaps throughout your build.

Ongoing Post-Build Support

Our relationship continues after handover with automated maintenance check-ins every six months to inspect your ventilation filters, gutters, and structural elements.

Architect partnership — Blaise Building Services

Early Construction Involvement

Design-stage collaboration that eliminates late-stage cost surprises

Architect Partnership

Formulating an Architect Partnership

We do not believe in standard tendering. If a builder first sees your plans at tender, budget conflicts are discovered too late. We establish an early architect partnership from the schematic design stage, using our Early Construction Involvement (ECI) process to review buildability and material specifications. This keeps your architect's design intent intact while securing your construction budget on paper before final documentation is finalised.

Our certified expertise allows us to support your chosen architect throughout the design phase, providing structural details that eliminate thermal bridges and secure the performance of your building envelope.

Schematic design review — buildability and material specifications checked early

Budget aligned to drawings before final documentation

Thermal bridge elimination and building envelope performance secured

Discuss Your Project

Building Insights

High-Performance Building Insights

To help you navigate pre-construction, Stephane has answered two of the most critical questions we receive from custom home buyers.

How does early builder involvement protect my custom home budget?

Engaging us early during the design development stage allows us to review your architect's plans for cost and constructability before drawings are finalised. This prevents the costly redesigns and late-stage contract variations that typically cause budget blowouts.

Is a certified high-performance home actually worth the investment in Sydney's climate?

Yes, because our template is designed around thermal stability, mould elimination, and acoustic isolation. A certified high-performance home uses up to 90% less heating and cooling energy, meaning you pay upfront to eliminate the recurring costs of running a drafty home.

Common Questions

Honest Answers to Our Why Choose Us FAQs

Choosing a dedicated high-performance home builder in Sydney requires complete clarity on credentials, timelines, and systems.

Access Our Complete FAQs

What is the primary point of difference between Blaise and other custom builders?

We are a premium builder that tests our workmanship in person rather than making unverified quality claims. Every project we construct must pass a physical Blower Door Test upon completion to verify airtightness and the continuity of insulation.

Do you provide a written warranty covering your work?

Yes, we back our design-to-budget process and certified construction with a comprehensive workmanship guarantee. We take full responsibility for the final result and coordinate our specialised trades to manage your timeline smoothly.

Can any architect design a high-performance home with Blaise?

Yes, we regularly collaborate with Sydney architects who are new to high-performance building science. Our ECI consulting process provides your architect with the technical specifications and detailing support required to achieve Passivhaus standards.

Take the First Step

Start Your Build with Absolute Certainty

Don't leave your family's comfort and your budget to chance. Book your On-Site Feasibility Study with Stephane today. One hour on-site gives you the clarity to move forward, or the confidence to pause.