Building design and DA/CDC documentation,
done right the first time.
Trinity Design & Planning delivers clear, accurate plans and approval support for homes, duplexes and developments across Sydney & Western Sydney.
100+
Projects approved
★★★★★
Sydney's trusted designers
What we do
End-to-end design & documentation
From feasibility and concept through to approval-ready drawings — handled by one team.
Custom Home
Personalised designs shaped around your lifestyle and site.
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Duplex
Efficient layouts and yield optimisation with full docs.
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Granny Flat
Fast, accurate planning with BASIX and approval included.
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Building Design
Fully detailed plans tailored for DA or CDC pathways.
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Drafting & Docs
Millimetre-perfect plans for approvals and construction.
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Residential design & drafting across Sydney
Why clients choose us
Approval-ready plans, communicated clearly.
We're a Sydney-based studio specialising in residential plans that support efficient approvals and smooth construction. We guide you through the entire design and documentation process.
About TrinityFast, reliable DA/CDC documentation
Plans drafted to NSW standards so submissions move through council and certifiers without surprises.
Buildable plans your builder will appreciate
Millimetre-precise drawings, clean notation and logical sequencing — fewer site queries, less rework.
Local Western Sydney expertise
Deep familiarity with Fairfield, Liverpool, Parramatta and surrounding council DCPs and SEPP pathways.
Trusted designers
Sydney's trusted building designers
Homeowners, builders and developers across NSW rely on Trinity for accurate documentation, clear communication and a smooth path to approval.
DA & CDC
Full submission packages prepared and lodged via the NSW Planning Portal.
BASIX, SEE & WMP
Compliance documents prepared in-house for a single point of contact.
Coverage
Suburbs we serve
Servicing Fairfield, Liverpool, Parramatta, Bankstown and surrounding suburbs — and available across NSW.
- Fairfield West
- Fairfield
- Smithfield
- Parramatta
- Bankstown
- Campbelltown
- Blacktown
- Cabramatta
- Liverpool
- Wetherill Park
- Bossley Park
- Inner West Sydney
- and surrounding suburbs
Instant estimate
Get an indicative price for your project
Answer a few quick questions about your build and we'll give you a starting price for design and documentation. No email required to get started.
- Tailored to project type, size, and approval pathway
- Includes drafting, BASIX, SEE and submission options
- Final fixed quote provided after a free consultation