Our Performance Commitments

The Blaise Precision Guarantee: Our Builder Guarantee in Sydney

Blaise Building Services backs every residential build with a strict, system-based builder guarantee in Sydney. We call it the Blaise Precision Guarantee. It is an operational promise that secures your custom project from pre-construction to handover, guaranteeing design-to-budget alignment, certified airtightness performance, and complete transparency in communication.

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The Problem

Why Most Construction Guarantees Fail

A standard home builder warranty in Sydney only covers structural defects after they have occurred. This is a reactive measure, not a preventive one. For a premium custom project, a post-construction warranty does not protect you from the true risks of residential building: design misalignments, unexpected cost blowouts, and silence from your contractor.

We operate differently. We believe a genuine quality-guarantee builder framework must be active throughout the entire project lifespan. Our commitments are backed by physical testing and transparent administrative systems, giving you the confidence to build with absolute peace of mind.

Proactive — not reactive

Physically tested on site

Budget aligned before we start

Daily project visibility

Single point of accountability

Post-build care included

Blaise Building Services construction quality

Our Commitments

The Four Pillars of the Blaise Precision Guarantee

Our workmanship and delivery standards are guaranteed through four concrete systems.

Design-to-Budget Certainty

We guarantee that if you engage us early through our ECI process, we will align your architect's design with a realistic construction budget before final documentation is finalised. By reviewing constructability and pricing early, we prevent late-stage design cuts and cost overruns.

Certified Thermal Performance

We guarantee that your custom home will meet the strict thermal and airtightness standards of the international Passive House standard, verified by an independent physical Blower Door Test at completion. You receive the certified test report as documented proof.

Zero Communication Gaps

We guarantee that you will always know exactly what is happening on your site. Through your WunderBuild client portal, you have daily access to project schedules, progress photos, and direct chat with Stephane, removing all silent weeks.

Post-Build Care Reminders

We guarantee to help you protect your home's high-performance envelope. Every six months, we send automated maintenance reminders for filter checks, gutter clearing, and system audits to protect your home's performance and finishes over the long term.

Blaise Building quality assurance on site

Single Point of Accountability

Design, engineering, and construction managed under one roof

Quality Assurance

Clear Defect Responsibility and Quality Assurance

Renovation anxiety and building stress usually stem from split responsibility. When separate designers, engineers, and builders work in isolation, they often point fingers at each other when issues arise during construction.

Blaise Building Services acts as your single point of accountability. We manage the design integration, engineering coordination, and physical construction under one administrative umbrella. This means we take full responsibility for any defects in the finished results. Our detailed quality assurance process ensures every structural connection and airtight detail is inspected and signed off before we cover it up.

Every structural connection inspected and signed off before concealment

Full defect responsibility — no split accountability between trades

Airtight membrane continuity verified at every framing stage

Discuss Your Project

Building Insights

High-Performance Building Insights

To help you understand how we back our custom projects, Stephane has answered two of the most common questions we receive regarding building guarantees.

What makes the Blaise Precision Guarantee different from a standard home builder warranty?

A standard warranty only covers structural defects after they have occurred. Our guarantee is a proactive operational system designed to prevent defects in the first place, using early cost alignment, airtight membrane inspections, and physical completion testing to ensure your quality from day one.

How does your team physically verify that our home's performance is guaranteed?

We do not guess or estimate your home's energy efficiency; we physically measure it. At practical completion, we conduct a Blower Door Test to measure air changes per hour. We do not hand over the keys until the building has successfully achieved its certified Passive House airtightness targets.

Common Questions

Honest Answers to Our Guarantee FAQs

A custom build requires complete clarity on warranties, communication, and timelines.

Access Our Complete FAQs

What is the scope of your workmanship guarantee?

We back our certified carpentry and structural framing with a comprehensive workmanship guarantee that exceeds NSW statutory requirements. This commitment is supported by our disciplined quality assurance process and on-site oversight by Stephane Blaise.

How do you manage timelines and prevent project delays?

We manage our schedules in real time through the WunderBuild portal, resolving material procurement and trade sequencing during our detailed pre-construction phase. Resolving project detailing on paper before we step on site is the single most effective way to protect your timeline.

Does your guarantee cover the mechanical ventilation system?

Yes, we guarantee that your mechanical Heat Recovery Ventilation (HRV) system is professionally designed, balanced, and commissioned to deliver continuous fresh indoor air. We also provide ongoing support, including automated filter maintenance reminders every six months, to keep your system performing at its peak.

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.

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About the Author

Written and reviewed by Stephane Blaise. Director, Blaise Building Services. Certified Passive House Tradesperson and Certified Passivhaus Designer (Passivhaus Institut, Germany). Licensed Builder, NSW Fair Trading. Member, Master Builders Association NSW and Australian Passive House Association.

Certified Passivhaus Designer — Passivhaus Institut, Germany

Licensed Builder — NSW Fair Trading

Master Builders Association NSW & Australian Passive House Association

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OUR GUARANTEE