Home renovations
Kitchen, bathroom and whole-home reconfiguration designed around how your family lives, your existing structure and a realistic construction budget.
Explore this service →Request a renovation fee proposal
中文Start a project →Complex projects · Clear direction · Practical value
Complex projects.
Made clear.
Patient, professional building design and complete project coordination—from first idea and approval strategy through construction support and final sign-off.
10+ years' experienceAccredited Building DesignerNSW-licensed Kitchen, Bathroom & Laundry RenovatorCompetitive, transparent fees
Start with your project type
The right advice for the way you want to improve your home.
Ground-floor extensions
Single-storey and rear extensions that improve light, circulation and indoor–outdoor living while responding to site and planning controls.
Explore this service →Discuss an extensionSecond-storey additions
Feasibility-led upper-floor additions coordinated with structure, setbacks, privacy, streetscape and the right DA or CDC pathway.
Explore this service →Book an addition consultationApprovals & documentation
DA, CDC, CC and BIC strategy, drawings, submissions and consultant coordination—kept clear from feasibility to construction.
Explore this service →Ask about approval drawingsCredentials that match the work
Design knowledge backed by renovation experience.
The KBL licence is limited to its NSW licence category and is not a general building licence. Professional registration and project-specific information are supplied as part of engagement.
Experienced where projects become complicated
More than drawings. A clear path through design, approval and construction.
AusJu Design & Build combines building design, approval knowledge and hands-on construction experience. Whether the challenge involves an existing building, heritage controls, unauthorised work, multiple consultants, NCC and BASIX requirements or a project already under construction, we stay patient, practical and focused on the next workable step.
Start a conversation →What we do
Clear advice. Precise documentation. Better outcomes.
Development Applications
Council-ready design, planning documentation and coordinated submissions.
Enquire →Complying Development
A clear, efficient approval pathway for eligible homes and alterations.
Enquire →Building Information Certificates
Measured drawings and documentation for unauthorised or existing works.
Enquire →Construction Certificates
Detailed construction documentation, consultant coordination and approvals.
Enquire →Feasibility studiesConcept design & 3DDA / CDC documentationNCC & BASIX coordinationConstruction drawingsInterior designProject support
More than drawings
Good projects depend on coordination, judgement and follow-through.
Approval strategy
Choosing and managing the right DA, CDC, CC or BIC pathway—not simply producing a set of plans.
Consultant coordination
Bringing together certifiers, engineers, surveyors, energy assessors and specialist consultants.
Construction knowledge
Design decisions informed by buildability, site conditions, budget and final inspection requirements.
Patient guidance
Explaining complex issues in plain language and giving every client clear, responsive support.
Complex project capability
When the project is difficult, experience matters more.
Some projects require far more than standard drawings. They need the right approval strategy, careful consultant coordination, persistent problem-solving and an understanding of how the work will actually be built and signed off.
Existing & unauthorised work
BIC documentation, measured drawings and practical rectification pathways.
Heritage & constrained sites
Sensitive design responses, specialist coordination and detailed approval documentation.
Commercial change of use
Planning, accessibility, fitout, construction and occupation requirements coordinated together.
NCC & BASIX coordination
Design documentation coordinated with energy, structure, fire-safety and certification inputs relevant to the project.
Industrial facilities
Operational planning, vehicle access, fire-safety inputs and coordinated construction documentation.
Projects already in motion
Clear advice when design, approval and construction issues need to be resolved quickly.
Featured projects
Local project experience, organised by type and Sydney region.
Selected design and approval work across Sydney and NSW. Each project responds to its site, planning controls and the people who will use it.
Showing 8 projects
Toongabbie Knockdown Rebuild
Knockdown Rebuild · 5-Bedroom Home · CDC Documentation
- Approx. 1,186 m² site
- Five bedrooms
- Under construction
A new two-storey family residence replacing the former dwelling on a generous Toongabbie site. The design coordinates five bedrooms, multiple living areas, a study, gym, internal courtyard and double garage within a practical CDC and construction package.
View project →North Ryde Duplex
Attached Duplex · 4 Bedrooms Each · CDC Documentation
- Approx. 815.5 m² site
- Approx. 246.3 m² per dwelling
- Four bedrooms per home
A two-storey attached dual occupancy designed as two well-resolved family homes within one cohesive frontage. Each dwelling includes four bedrooms, a study, office, multiple living spaces, private outdoor areas and a garage.
View project →Contemporary House
New House · Design · DA / CDC
- Concept & approval design
- 3D visualisation
- DA / CDC pathway subject to site
Alterations & Additions
Design · CDC Approval · Construction Documentation
- Two-storey transformation
- CDC approval
- Construction documentation
A successful two-storey transformation balancing family needs, existing-building constraints, CDC requirements and construction practicality within one coordinated solution.
Commercial Fitout
Heritage Building · DA + CC · Fitout · Occupation Approval
- Heritage building
- DA + CC
- Construction & occupation support
A modern clinic delivered inside a heritage building. AusJu coordinated design, specialist inputs, fast and successful DA and CC approvals, construction support, inspection and final occupation approval as one seamless service.
Industrial Facility
Steel Warehouse · CDC · Construction Documentation
- Steel warehouse
- CDC documentation
- Consultant coordination
A purpose-designed steel warehouse integrating administration, vehicle and pedestrian access, fire-safety inputs and consultant documentation into an efficient CDC and construction pathway.
Secondary Dwelling
Granny Flat + Studio · CDC · Construction Drawings
- 58.8 m² granny flat
- Separate studio
- CDC documentation
A smart 58.8 m² granny flat paired with a separate studio, planned through an efficient CDC pathway. The flexible arrangement can support extended family, guests, working from home or future rental options, subject to applicable approvals.
Alexandria Cafe Fitout
Cafe · Change of Use · DA · Construction Documentation
- 74 m² fitout
- Change of use
- DA & construction documentation
A 74 m² cafe transformation combining an efficient kitchen and coffee service zone, accessible amenities, outdoor seating and a refreshed shopfront. AusJu coordinated the change-of-use design, council response and detailed documentation for a practical, customer-focused venue.
New projects can be added using the same simple template.Discuss a similar project →
From first idea to final sign-off
One experienced point of contact through every stage.
Feasibility
We identify the site constraints, opportunities, budget and most suitable approval strategy.
Design
We develop a practical, refined solution that responds to planning controls and construction realities.
Document
We prepare clear, coordinated drawings for approval, pricing and construction.
Approve
We coordinate consultants, certifiers and submissions, and respond to issues as they arise.
Construct
We support builders and clients with technical clarification and practical design decisions.
Complete
Where required, we assist with inspections, rectification and the pathway to final occupation approval.
Professional service. Practical fees. Genuine value.
Experienced advice without unnecessary overhead.
Our focused structure keeps communication direct and fees competitive. Clients receive hands-on senior attention, practical solutions and a clearly defined scope shaped by approval risk, construction cost and long-term value.
Value-led from day one. Design decisions consider your budget, buildability and the cost of getting approvals wrong.
The same care at every scale. A small alteration can matter as much to a family as a major development. Every project receives patient, professional attention.
One point of contact. We coordinate drawings, consultants, certifiers and approvals so you always know what comes next.
Clear, responsive communication. We explain choices and problems in plain language, without leaving clients to navigate the process alone.
A real team, accountable throughout
Led by Chunfu Cai.
AusJu is led by an Accredited Building Designer, Registered Design Practitioner for Class 2 work, and NSW-licensed kitchen, bathroom and laundry renovator with more than ten years of experience across design, approvals, documentation and project support in Sydney.
Registered architect collaboration. NSW Registered Architect Le Yu (ARB 11536, Practising / Active) works with AusJu. AusJu itself is not a registered architecture practice; the responsible practitioner and scope are confirmed for each project.
What we can show you
Relevant design drawings, approval documentation, 3D work and available construction-stage material can be discussed during your consultation.
What we will not claim
We do not publish invented review scores, project counts, approval guarantees or an office address that does not exist.
Request relevant project examples →Clear scope before you commit
Competitive fees, explained stage by stage.
Every project is different, so we do not hide a generic price behind unclear inclusions. You receive a written proposal matched to the site, approval risk and level of documentation required.
Request a tailored fee proposal →- Design, documentation and lodgement stages itemised
- Known council, certifier and consultant fees identified separately
- Optional construction support clearly separated
- Scope changes discussed and agreed before extra work proceeds
Homeowner questions
Clear answers before design begins.
Do I need a DA or can my project use CDC?+
It depends on the property, planning controls and proposed work. We begin with a feasibility review and recommend the most suitable pathway before detailed design.
Can you assess a rear extension or second-storey addition?+
Yes. We review the existing house, site constraints, planning controls, likely structural implications and approval options before the design is developed.
How long will approval take?+
Timing varies by pathway, council, project complexity and consultant inputs. We set out the likely stages and actively coordinate responses, but do not promise an approval timeframe we cannot control.
Do you coordinate engineers, surveyors, BASIX and certifiers?+
Yes. We can coordinate the consultant team and integrate their information into the design and approval package. External consultant fees are identified separately.
Can you stay involved during construction and final approval?+
Yes. Depending on the agreed scope, we can answer technical questions, coordinate design changes and assist with inspections, rectification and final sign-off pathways.
How are design fees explained?+
We provide a written, staged proposal. Design, documentation and lodgement services are itemised, with council, certifier and consultant costs separated where known.
Do you take on smaller projects?+
Yes. A small renovation or approval problem can be highly important to its owner. We apply the same patient, professional care at every scale.
Which areas do you service?+
We are based on Sydney's North Shore and work across Chatswood, Willoughby and Greater Sydney, subject to project fit and site requirements.
Sydney homeowner resources
Useful guidance, not sales copy.
Sydney Building Designer
See our residential design, approval, Class 2 and complex-project capabilities across Greater Sydney.
Explore Sydney building design →Looking for a Sydney Architect?
Understand how our building designer and NSW Registered Architect work with suitable Sydney projects.
Meet the project team →Building Designer vs Architect
Understand the protected architect title, professional credentials and what to compare before appointment.
Read the comparison →Sydney Home Extension Planning Guide
A practical overview of feasibility, DA versus CDC, consultants, BASIX, documentation and construction preparation.
Read the guide →Registered design coordination
How AusJu approaches regulated design responsibilities and multidisciplinary coordination for eligible Class 2 work.
Explore Class 2 services →Greater Sydney service area
Local building design knowledge, across Sydney.
Based on Sydney's North Shore, AusJu supports homeowners, businesses and builders in Chatswood and throughout Greater Sydney. Our services include feasibility advice, residential alterations and additions, new homes, secondary dwellings and granny flats, commercial fitouts, heritage building approvals and industrial facilities.
We prepare and coordinate DA, CDC, CC and BIC documentation, drawing on practical experience with local planning controls, certifiers, engineers and construction 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
Begin your project
Tell us what you're planning.
Start with a free consultation. Send your name, phone number, property suburb or address, and project type. We'll help you understand the opportunities, constraints and most suitable approval pathway.