Class 2 Building Certification Sydney | Residential Towers

Multi-dwelling CDC issued in 20–30 days. No council. No public exhibition.

Get a Free Quote0421 936 489

"Our townhouse DA spent 11 months in council assessment - and came back with 22 conditions. No1 told us upfront which conditions would apply and planned around them."

Multi-dwelling developments must satisfy fire engineering, BCA Section C, shared driveway design, and individual BASIX compliance for every lot - all before a single slab is poured.

  • Full BCA Section C fire engineering review for attached dwellings
  • Shared infrastructure (driveways, drainage) assessed in the same CDC
  • Staged Occupation Certificates available for staged handover projects

Eligibility Check

Can your townhouse development be CDC-approved?

Select all that apply to your project.

Tick each criterion that applies to your project

Your project likely qualifies for a fast CDC.

No council. No delays.

Get your free quote

You missed a few requirements.

Based on your selection, your project might require an alternative approval pathway (like a DA). You are missing:

  • Located in New South Wales
  • Individual lots comply with SEPP Housing 2021 dual occupancy provisions
  • Building height under 8.5m
  • Not in a heritage conservation area
  • Each dwelling has compliant setbacks under SEPP, not custom DCP overlays
  • Shared infrastructure design meets local authority 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 936 489

Multi-dwelling certification.
Staged, controlled, on-time.

Typical 4–8 dwelling development certified in 20–30 business days.

  1. Day 1

    Complete Drawings Submitted

    Full architectural set plus structural, hydraulic, and fire engineering reports.

  2. Days 1–10

    BCA & Fire Review

    Volume One compliance, fire separation, egress, and shared infrastructure checked.

  3. Days 10–20

    Conditions Addressed

    Any conditions resolved directly with your design team - no council queue.

  4. Day 20–30

    CDC Issued

    Certificate covers all dwellings. Builders mobilise on the full site.

  5. During Build

    Stage Inspections

    All critical inspection stages managed by our team across the full development.

  6. Completion

    Staged OC Issuance

    OCs issued per-lot as dwellings complete - enabling staged settlement.

Have a question about the process? Call us - we're happy to walk you through it.

Scope of Works

Residential Certification Services

Expert guidance and fast approvals to get your residential project out of the ground sooner.

Complying Development (CDC)

Bypass council DA delays. We assess and approve Complying Development Certificates rapidly.

Perfect for new homes, duplexes & granny flats
Approval typically in 10–15 business days
We handle all government portal lodgements
Free initial eligibility consultation
Independent expert assessmentGet a quote
Complying Development (CDC)

Ready to get started?

Get a fast-tracked quote from a licensed NSW certifier. Most clients hear back within 2 hours.

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Select your project type

See the exact documents needed. No guesswork, no endless lists.

Architectural Drawings (all lots)

Floor plans, elevations, sections, fire wall details

Site / Survey Plan

Showing all lot boundaries, shared driveways and common areas

BASIX Certificates (per dwelling)

Individual energy certificate for each dwelling

Structural Engineering Report

Including shared footings and retaining walls

Fire Engineering Report

For attached dwellings under NCC Volume One

Hydraulic / Drainage Plan

Shared stormwater management design

Landscape Plan

Showing private open space compliance per lot

Missing something? Don't worry — we can help source it.

Start your application

Where We Provide This Service

No.1 Building Services provides fast, unrestricted certification across the following regions. Explore our interactive coverage map.

Greater SydneyParramattaBlacktownPenrithLiverpoolCastle Hill
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Unrestricted Authority

Our Certification Capabilities

Recent Townhouses & Multi-Dwelling we've certified

High-rise residential tower certification capabilities

Class 2 - Residential

High-Rise Residential Towers

Approvals typically in ~35 days

Custom home Complying Development Certificate capabilities

Class 1 & 2 - Residential

Custom Luxury Homes & Duplexes

CDCs typically in ~14 days

Residential swimming pool compliance capabilities

Class 10b - Residential

Swimming Pools & Minor Structures

CDCs typically in ~5 days

Multi-dwelling certification - your questions answered.

Yes, if the land and design meet the applicable complying development standards. Eligibility depends on zoning, lot size, layout, access, site constraints and NCC requirements.

For staged projects, an Occupation Certificate may be issued for an eligible completed dwelling or part, if statutory requirements are satisfied. Avoid using 'interim OC'.

Attached Class 1a dwellings require compliant fire separation under the applicable NCC requirements. The submitted wall system and construction details must be reviewed before certificate issue.

No. One appointed Principal Certifier can manage the approved development, inspections and OC process, subject to the approval structure and statutory requirements.

Get in touch

Request a quote

We'll review your project details and get back to you within 24 hours.

Building certifier inspecting blueprints

Unrestricted certifiers

Your project is reviewed directly by NSW-accredited certifiers - no middlemen.