Retail below, residential above. Approved seamlessly.
"Our mixed-use development consent had 45 complex compliance conditions. We struggled to coordinate fire rating approvals between retail shops and apartments. No1 Building Services provided clear BCA reviews, resolved compliance gaps, and issued the CC to unblock construction."
Mixed-use developments require deep knowledge of both commercial and residential fire safety, acoustic separation, and access compliance under the NCC. We handle complex multi-classification assets with no height or floor area limits.
- BCA fire compartmentation audits to separate retail and residential zones
- Acoustic and sound transmission compliance reviewed to NCC specs
- One unrestricted certifier to manage CC, stage inspections, and final OC
Eligibility Check
Mixed-use development certification qualifiers
Select all that apply to your project.
You missed a few requirements.
Based on your selection, your project might require an alternative approval pathway (like a DA). You are missing:
- Zoning permits mixed-use commercial & residential development
- Separate access and egress paths are provided for residential tenants
- Fire-resistance levels (FRLs) meet NCC Class 2 & Class 6 requirements
- Acoustic ratings satisfy acoustic separation standards
Don't worry, we've got you.
Our experts can counsel you on alternative pathways and guide you through the process. Call us immediately for a free consultation.
Call 0421 936 489From design
to final compliance.
Mixed-use approvals customized around your construction stages.
Day 1
PC Appointment
Appoint No1 Building Services as your Principal Certifier via the NSW Planning Portal.
Days 1–7
BCA Multi-Class Review
We perform a comprehensive review of fire compartmentation, egress paths, and structural specs.
Days 7–14
CC Issue
Once compliance is confirmed, we issue the Construction Certificate so excavation and construction can begin.
Build Phase
Stage Audits
We conduct structural, waterproofing, and fire-separation inspections as your build progresses.
Completion
Occupation Certificate
Final inspections passed. Interim or Final OC issued to allow tenants and retail businesses to occupy.
Have a question about the process? Call us - we're happy to walk you through it.
Scope of Works
Unrestricted Certification Services
Comprehensive Class 2–9 building certification and compliance auditing tailored for commercial and industrial developments.
Construction Certificates (CC)
Full NCC/BCA assessment and issuance of Construction Certificates for DA-approved commercial builds.
Ready to get started?
Get a fast-tracked quote from a licensed NSW certifier. Most clients hear back within 2 hours.
Select your project type
See the exact documents needed. No guesswork, no endless lists.
Development Consent (DA)
Approved DA plans and conditions from Council.
BCA Compliance Report
For mixed Class 2 (residential) and Class 5/6 (commercial) spaces.
Fire Engineering Report
Detailed fire safety and compartmentation strategy.
Acoustic Design Cert
Detailing sound transmission barriers between zones.
Missing something? Don't worry — we can help source it.
Start your applicationWhere We Provide This Service
No.1 Building Services provides fast, unrestricted certification across the following regions. Explore our interactive coverage map.
Mixed-use Developments FAQs
Mixed-use developments commonly combine residential, commercial or retail building classes, such as Class 2 apartments with Class 5 offices or Class 6 retail. Each part must meet the applicable NCC requirements.
Some minor fit-outs or alterations may qualify for CDC. New mixed-use developments usually require DA approval followed by a Construction Certificate.
Fire separation is assessed under the applicable NCC requirements, fire engineering reports and approved plans. The required FRLs depend on the building classes, layout and fire-safety strategy.
Get in touch
Request a quote
We'll review your project details and get back to you within 24 hours.
Unrestricted certifiers
Your project is reviewed directly by NSW-accredited certifiers - no middlemen.