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 is an experienced custom home builder in Sydney, constructing healthy, high-performance custom homes across the Eastern Suburbs. As a certified bespoke home builder, we integrate early with your architect to ensure budget certainty, airtightness performance, and meticulous European finishes on every build.
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.
Hands-on precision building in Sydney's Eastern Suburbs
Blower Door Tests conducted at every build — not just handover
Core Passive House standards built into every envelope
We only take on bespoke, architecturally designed projects
Building a custom home should reflect your site, your lifestyle, and your architect's vision — without the typical stress of budget overruns. As a specialist custom home builder in Sydney, we construct exact-fit, architecturally designed homes built to withstand coastal environments.
We specialise in delivering architect-led premium builds for clients who value craftsmanship, health, and precision over the lowest-cost volume tenders. We do not construct standard project homes, and we do not take on builds without first aligning the construction costs on paper.
Read Our Meticulous Carpentry Story
Most building budget blowouts in Sydney residential construction occur because the builder is engaged after drawings are finalised. We change this with our Early Construction Involvement (ECI) process.
We establish a transparent builder collaboration with your architect during the design development stage, review detailing for buildability, and model your project's real construction costs before final documentation.
Review Our Step-by-Step Build ProcessWe enter the project before final drawings are submitted for council approval, providing real-time cost and buildability feedback to your architect.
We produce a detailed, itemised cost model using 3D SketchUp takeoffs aligned to your specific drawings — no speculation, no guesswork.
With every specification resolved on paper, we sign a fixed-price contract that reflects documented reality — protecting your budget from start to handover.
Every home we construct is designed around a site-specific design that incorporates the five core principles of the Passive House standard — verified at completion by a physical Blower Door Test.
Unbroken insulation wrapping the entire building envelope — no cold spots, no thermal gaps.
High-performance vapour-control membranes and sealing tapes that eliminate uncontrolled air movement.
Mechanical HRV systems that deliver fresh, filtered air without losing the building's thermal energy.
Double- and triple-glazed uPVC or timber frames eliminating condensation and heat transfer.
Every junction, penetration, and structural connection detailed to eliminate cold bridges and moisture risk.
Every build is physically tested with a Blower Door Test providing certified, documented proof of your home's performance.
Learn MoreStephane has answered three of the most critical questions we receive from custom home buyers in Sydney.
Absolute project transparency, direct communication, and verified building performance. A premium builder must use modern cloud-based systems like WunderBuild to keep you informed of daily progress, schedules, and financials while guaranteeing senior, on-site supervision throughout the project.
Yes, because Passive House is a performance standard that dictates how a home behaves, not how it looks. The airtight membranes, mechanical systems, and thermal detailing live behind the walls, allowing you to design any architectural style you choose while enjoying stable indoor temperatures and clean indoor air.
A builder should join your team at the schematic design stage, before final drawings are submitted for council approvals. This early ECI engagement allows us to run cost-alignment audits and catch detailing bottlenecks while they are still cheap to fix on paper.
Real physical proof. Mapped and tested in Sydney's coastal suburbs.
Passive House
A cliffside custom build. Features west-facing principal living engineered with continuous insulation and high-performance timber glazing to remain comfortable year-round.
Coastal Build
Bespoke coastal construction designed to handle high wind loads and direct UV exposure without structural dampness or moisture problems.
First in Australia
Australia's first structural rooftop garden on a certified bespoke Passive House. Features a slab-to-cladding airtight envelope verified at 0.9 air changes per hour.
Constructing a bespoke custom home in Sydney requires complete clarity on warranties, structural steel, and timelines.
Access Our Complete FAQsA project home is built from a fixed, standardised catalogue designed for flat suburban blocks. A custom home is a bespoke project engineered from scratch to match your specific block's topography, soil conditions, wind loads, and your family's personal lifestyle needs.
Yes, Stephane Blaise has over 20 years of experience executing highly complex, structurally challenging residential designs across Sydney's Eastern Suburbs. We are specialised in incorporating heavy steel framing and bespoke finishes into high-performance, airtight envelopes.
We are a high-performance custom homes Sydney specialist that physically tests and certifies our work. We do not make vague quality claims; we conduct Blower Door testing at completion to prove our airtightness standards.
Do not risk commissioning an architectural design on a site that cannot support your budget or performance goals. Book a custom home feasibility consultation with Stephane Blaise today to review your brief, evaluate site geotech constraints, and establish a clear, structured pre-construction path for your project.
Request Your Custom Build Feasibility Session
