Blaise Building

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.

Passive House People
BESPOKE HOME BUILDER SYDNEY

CUSTOM HOME BUILDER SYDNEY

Blaise Building Services — custom home builder Sydney
Custom Build Overview

Sydney's Specialist Custom Home Builder

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.

Book Your On-Site Feasibility Study
20+years

Hands-on precision building in Sydney's Eastern Suburbs

tested

Blower Door Tests conducted at every build — not just handover

5principles

Core Passive House standards built into every envelope

0volume builds

We only take on bespoke, architecturally designed projects

Precision & Certainty

Bespoke Homes Built with Precision and Certainty

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
Bespoke custom home Sydney — Blaise Building Services
Early Builder Involvement

The ECI Difference: Direct Builder Collaboration

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 Process
01

Join at Schematic Design Stage

We enter the project before final drawings are submitted for council approval, providing real-time cost and buildability feedback to your architect.

02

Quick Building Estimate (QBE)

We produce a detailed, itemised cost model using 3D SketchUp takeoffs aligned to your specific drawings — no speculation, no guesswork.

03

Fixed-Price Contract, Zero Surprises

With every specification resolved on paper, we sign a fixed-price contract that reflects documented reality — protecting your budget from start to handover.

Building Envelope

High-Performance Building Envelope Principles

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.

Continuous Insulation

Unbroken insulation wrapping the entire building envelope — no cold spots, no thermal gaps.

Airtight Membranes

High-performance vapour-control membranes and sealing tapes that eliminate uncontrolled air movement.

Heat-Recovery Ventilation

Mechanical HRV systems that deliver fresh, filtered air without losing the building's thermal energy.

Thermally Broken Glazing

Double- and triple-glazed uPVC or timber frames eliminating condensation and heat transfer.

Zero Thermal Bridges

Every junction, penetration, and structural connection detailed to eliminate cold bridges and moisture risk.

Verified at Completion

Every build is physically tested with a Blower Door Test providing certified, documented proof of your home's performance.

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Building Insights

High-Performance Building Insights

Stephane has answered three of the most critical questions we receive from custom home buyers in Sydney.

What should you expect from a custom home builder 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.

Can a custom home be both beautiful and genuinely high performance?

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.

How early should your builder be involved in the design process?

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.

Completed Builds

Selected Custom Projects

Real physical proof. Mapped and tested in Sydney's coastal suburbs.

Coogee Passive House

Passive House

Coogee 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.

Phillip Bay Passive House

Coastal Build

Phillip Bay Passive House

Bespoke coastal construction designed to handle high wind loads and direct UV exposure without structural dampness or moisture problems.

Seaforth Passive House

First in Australia

Seaforth Passive House

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.

Common Questions

Honest Answers to Our Custom Home FAQs

Constructing a bespoke custom home in Sydney requires complete clarity on warranties, structural steel, and timelines.

Access Our Complete FAQs

What is the difference between a custom home and a standard project home?

A 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.

Do you work with structural steel and complex architectural designs?

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.

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

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.

Start Your Project

Align Your Custom Design with Absolute Budget Certainty

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
Stephane Blaise

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