Building Design Services
From feasibility to approved plans — designed for speed, compliance, and profit.
You’ve got a site that stacks up.
Now it’s time to turn that potential into a design that’s functional, compliant, and financially rewarding.
That’s where Duplex Building Design comes in.
We specialise in creating market-ready duplexes, townhouses, terraces, and multi-dwelling projects across NSW — designed for approval, buildability, and profit.
Why Our Building Design Process Works
Here’s the thing — design isn’t just about how it looks. It’s about how it performs.
A great design means:
- You build quicker and more cost effective because it’s planned right
- You sell or lease easier because the layout makes sense.
- You maximise return because every square metre works for you.
Our approach is built around one goal: a design that delivers profit without approval pain.
What’s Included in Our Building Design Services
We handle the entire design journey — from concept to construction-ready documentation.
Concept Design
Early-stage layouts that turn feasibility outcomes into functional, market-ready plans.
Design Development
We refine floor plans, elevations, and façade design to balance compliance, buildability, and appeal.
3D Modelling & Visualisation
See your project in realistic context with detailed 3D renders that make decisions easy and presentations compelling.
Approval Documentation (DA or CDC)
Full drawing sets and supporting documents prepared to meet council or certifier requirements.
Approval Coordination
Liaison with engineers, surveyors, and consultants to ensure your design moves through approvals and into construction without delay.
The outcome: a design package that’s beautiful, compliant, and ready to build.
Who We Design For
Our clients include:
- Investors and developers who want projects that deliver real ROI
- Builders needing functional, compliant designs that can be built fast and sold easily
- Homeowners creating duplexes or multi-dwellings to maximise property potential
We design for decision-makers who care about design, precision, and profitability
Why Clients Choose Duplex Building Design
- We think commercially. Every design starts with yield and return, not aesthetics alone.
- We know the rules. We navigate SEPP and council controls daily, ensuring faster approvals.
- We manage the process. You get one partner overseeing design, coordination, and approval — no chaos, no crossed wires.
- We deliver results. Our designs have helped clients achieve record returns and build-ready approvals in record time.
We don’t just design — we de-risk.
Our Design Process
Discovery & Brief
We meet to understand your site, your vision, and your financial goals.
Concept Design
We create initial layout options aligned with site constraints, yield targets and your design brief.
Design Refinement
We develop selected concepts into detailed plans, balancing functionality, aesthetics, and compliance.
Approval Preparation
We prepare documentation for DA or CDC submission, coordinating all consultants required and managing the approval.
Ready to Build
We finalise your plans, ready for construction certificate and tender.
You stay focused on the investment — we handle the rest.
Why This Stage Is So Critical
Too many projects fail here. Great sites become average builds because the design wasn’t planned around profit, compliance, or market demand.
That’s why we design every project with three lenses:
- Feasibility – Does it fit and perform financially?
- Compliance – Will council or certifiers approve it with minimal fuss?
- Buildability – Can your builder construct it efficiently?
When those three align, approvals fly and profits rise.
TESTIMONIALS
WHAT OUR CLIENTS SAY
Book a Design Consultation
Ready to take your project from possible to profitable?
Let’s discuss your site, your goals, and how to get your design approval-ready.
Book your Design Consultation today.
Why Start With Us
The best designs don’t happen by accident. They’re built on data, experience, and precision.
When you work with Duplex Building Design, you’re not just hiring designers, you’re partnering with NSW’s most trusted pre-construction team.
The outcome is simple:
Faster approvals. Smarter layouts. Bigger returns.
FREE DOWNLOAD
PERFECT DESIGN BRIEF
Get your FREE checklist that's been crafted over the last 20 years, creating killer design briefs that help us nail the design
DBD BUILDING DESIGN
We have been designing New Homes, Townhouses, Duplexes, Additions & Renovations for over 15 years. With that much experience you know you’ll be in good hands.
Council DA Drawing and
CDC Approvals
Council DA/CC Drawings and CDC (Complying Development) Private Certifiers
New & Unique Homes or Renovations
Designs & plans for new and unique homes or renovations. Also including new decks, carports, garages & first floor addtions
Detailed
CAD Plans
We prepare detailed CAD plans and drawings for various developments, This includes, new homes, townhouses, duplexes & renovations.
Serving Wollongong and
Surrounding Area
Shop 1, 314 Windang Road
Windang NSW 2529
| Monday – Friday | 9am -5pm |
| Saturday | Closed |
| Sunday | Closed |
About Us
We have worked in Wollongong for over 15 years, Duplex Building Design provides residential clients a flexible and professional approach to building design and drafting. We work with Revit which is the industry leading software for 3D design and drafting to produce plans and 3D renders for you to review and submit to the relevant approval authorities.
We’ve worked with a diverse range of clients in Wollongong and pride ourselves on bending over backwards to provide plans and documentation that meet the needs of your family, tenants and customers.
We provide all residential design and drafting services. from renovation plans, Development application, construction certificate drawings to new home or duplex designs.
The Duplex Building Design team can help you with every stage from concept through to completion.