Apartments & Multi-Dwelling Compliance
Ecomaxhomes provides NatHERS and BASIX compliance services purpose-built for apartment buildings, townhouse developments, dual occupancies, and multi-unit residential projects across New South Wales. NatHERS thermal ratings apply nationally under the NCC, while BASIX is a NSW-specific requirement administered by the NSW Government — our team handles both together. From boutique dual-occ builds to large-scale flat buildings with 20+ units, we deliver accurate thermal modelling and certification at a scale and speed that developers and builders rely on.
Built for Volume, Without Cutting Corners
Multi-dwelling projects come with unique challenges — repeated unit typologies, shared walls, varying orientations, and staged approvals. Our modelling process is structured around unit-type batching, so common floor plans are assessed efficiently while still capturing the specific orientation, shading, and construction variations that affect each dwelling’s rating.
We’ve delivered compliance work on developments ranging from dual occupancies to 30+ unit townhouse and flat building projects, including detailed NatHERS/BASIX pricing and feasibility assessments for developers at the planning stage.
Our Multi-Dwelling Services
NatHERS Assessments by Unit Type
Thermal performance modelling grouped by floor plan and orientation, reducing turnaround time without compromising accuracy for each individual dwelling.
BASIX Certificates for Multi-Unit Developments
Water, thermal, and energy compliance certificates issued per dwelling, coordinated across the whole development for consistent, audit-ready documentation.
Whole of Home Assessments
Where required under the updated NCC provisions, we assess and certify household energy use across appliances, hot water, and other end-uses for each unit type.
Dual Occupancy & Townhouse Compliance
Fast-turnaround assessments tailored to the smaller-scale, high-repeat nature of dual occ and townhouse projects.
Staged & Bulk Project Support
For developments released in stages, we structure our modelling and reporting to align with your DA and CC staging, so compliance documentation is ready when you need it — not holding up your program.
Why Developers & Builders Choose Ecomaxhomes
- Unit-type batching — efficient modelling for repeated floor plans, keeping costs down on larger developments
- 24–48 hour BASIX turnaround on standard requests
- Transparent, tiered pricing with no surprise fees
- Experience at scale — from dual occupancies to 30+ unit developments
- HERA-accredited assessor (HERA10095) with NSW-wide project experience
Frequently Asked Questions
Do you offer bulk pricing for large townhouse developments?
Yes. We offer per-dwelling pricing for terrace and townhouse projects on developments of 30 or more units, with further discussion available for larger-scale or staged projects. Contact us for a tailored quote.
How long does BASIX certification take for a multi-unit project?
Standard turnaround is 24–48 hours per certificate, though large developments with many unit types may be scheduled in batches to align with your project timeline.
Can you handle apartment buildings with mixed unit types on different floors?
Yes. We model each unique floor plan and orientation combination individually, ensuring every unit’s rating reflects its actual position and exposure within the building.
Do you provide feasibility or pricing assessments before a project starts?
Yes. We can provide indicative NatHERS/BASIX pricing and compliance feasibility assessments during the planning or DA stage, helping developers budget accurately.
Is Whole of Home assessment required for apartments?
Whole of Home requirements depend on your project’s council and NCC pathway. We’ll confirm what applies during your initial assessment.
Is BASIX required Australia-wide or only in NSW?
BASIX (Building Sustainability Index) is a NSW-specific scheme, administered by the NSW Government and required for eligible residential development across New South Wales only. It is separate from, and in addition to, the national NatHERS thermal rating and NCC energy efficiency provisions, which apply Australia-wide. Ecomaxhomes handles BASIX certification for projects across NSW.
Is a NatHERS rating required for apartments and multi-dwelling projects Australia-wide?
Yes. NatHERS thermal performance ratings are used nationally across Australia to demonstrate building fabric compliance under the NCC. In NSW, a NatHERS rating typically works alongside a BASIX certificate, since BASIX is the additional state-based requirement specific to NSW.
What's the difference between BASIX and NatHERS for a multi-dwelling development?
NatHERS assesses the thermal performance of the building shell and is used nationally. BASIX is a separate, NSW-only assessment covering water efficiency and broader sustainability measures alongside thermal performance. Most NSW multi-dwelling projects need both to gain development approval.
Do all states in Australia use BASIX for multi-dwelling compliance?
No. BASIX applies only in New South Wales. Other states and territories use their own pathways alongside the national NatHERS and NCC framework, so requirements can differ if you’re developing outside NSW. Ecomaxhomes’ BASIX service is specific to NSW projects.
How much does a NatHERS or BASIX assessment cost for a multi-dwelling project?
Costs vary depending on dwelling type, number of units, and project complexity. Get in touch with your plans and unit count for an accurate, no-obligation quote.
What documents do you need to start a multi-dwelling assessment?
We typically need architectural plans (floor plans, elevations, sections), a site plan, and specifications for glazing, insulation, and services. We can advise on exactly what’s needed once we know your project stage.