Sydney building design · Greater Sydney

Sydney building designer for homes, approvals and complex projects.

AusJu combines building design, approval documentation and practical construction knowledge. You deal directly with an experienced practitioner from early feasibility through DA or CDC, coordinated drawings and construction support.

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Residential design built around real constraints

We design new homes, knockdown rebuilds, renovations, rear extensions, second-storey additions and secondary dwellings. Each response begins with the existing property, planning controls, family priorities and a realistic construction pathway.

A clear approval strategy before detailed design

We assess whether a DA or CDC pathway may be suitable, identify the drawings and consultant inputs required, and coordinate information for CC, BIC or construction where these form part of the agreed scope.

One point of coordination

Surveyors, engineers, BASIX or NatHERS assessors, certifiers and specialist consultants need consistent information. We coordinate the design package and help resolve issues rather than leaving the client to connect every discipline.

Practical support beyond approval

Our work can continue into construction documentation, technical clarification, design changes, inspections and final sign-off pathways, depending on the project and agreed engagement.

Relevant services

Building design services across Sydney

Home extensions & renovations

Ground-floor additions, whole-home reconfiguration, kitchens, bathrooms and indoor–outdoor living.

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Second-storey additions

Feasibility-led design coordinated with structure, privacy, setbacks, streetscape and approval requirements.

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DA, CDC, CC & BIC drawings

Approval strategy, design documentation, lodgement support and consultant coordination.

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Class 2 design practitioner services

Registered design coordination for eligible Class 2 regulated work.

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Local relevance

Local experience across Greater Sydney

AusJu is based on Sydney's North Shore and works across Chatswood, Willoughby, the North Shore and Greater Sydney. Service availability depends on project fit and site requirements.

Chatswood & Willoughby
Lower & Upper North Shore
Northern Beaches
Ryde & Hills District
Sydney CBD & Eastern Suburbs
Inner West
Parramatta & Western Sydney
St George & South Sydney
Sutherland Shire & South West Sydney

Choose the right professional

Building designer or architect?

The right consultant depends on the project, required registrations and the services you need. AusJu is led by BDAA Accredited Building Designer Chunfu Cai (Low Rise 6662). NSW Registered Architect and Design Practitioner Le Yu works with AusJu on suitable commissions. AusJu does not represent itself as a registered architecture practice.

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FAQ

Questions about appointing AusJu

Is AusJu a registered architecture practice?+

No. AusJu is a building design practice led by BDAA Accredited Building Designer Chunfu Cai. NSW Registered Architect and Design Practitioner Le Yu (ARB 11536; DEP7561231) works with AusJu on suitable projects. The responsible practitioner and scope are confirmed for each engagement.

What should I send for an initial discussion?+

Send the property address or suburb, a short description of the proposed work, any survey or existing plans, and your preferred contact details.

Can AusJu handle a difficult or partly commenced project?+

Yes, subject to an initial review. We regularly help organise existing information, identify approval or documentation gaps, coordinate consultants and set out the next practical steps.

Do you guarantee DA or CDC approval?+

No responsible consultant can guarantee an approval before the site and proposal are assessed. We provide a reasoned pathway, coordinated documents and responsive support while being clear about matters controlled by councils, certifiers and other authorities.