Affordable Passive House & Low-Energy Home Designs

No. The collection provides developed architectural starting points that can be individually assessed and adapted for suitable sites.

Each project still requires site-specific design work, performance assessment, documentation and an appropriate construction pathway.

It is intended to be a more affordable design pathway where a suitable developed design can be adapted rather than a completely new home being designed from first principles.

The actual fee depends on the selected design, site constraints, required changes, performance pathway and agreed scope of services.

The project scope and aims are individually assessed based on your needs.

Depending on the brief and budget, a project may pursue Certified Passive House, PHI Low Energy Building certification or a Passive House-informed low-energy design outcome without certification.

Explore our Projects

Yes, probably… As your architect Sunpath is independent and impartial so we are not tied to a single builder or manufacturer.

The builder and construction pathway must be appropriate for the project and capable of delivering the agreed design and performance requirements.

Most of these designs are intended to be well suited to SIPs, panelised construction, CLT, glulam, modular or other prefabricated methods.

If required they can also be constructed through conventional timber framing with careful high-performance detailing. The appropriate approach is determined for each project.

Yes. Several design families are intended for common Victorian suburban site conditions, including approximately 12 metre and 15 metre frontage blocks, subject to title, planning, orientation and site assessment.

See our passive house and low energy building projects at Camberwell,  McKinnon  or Thornbury

Not necessarily.

Some projects may proceed directly toward building-permit documentation. Others may require town planning drawings, reports and council approval before construction documentation can be completed.

The approval pathway depends on the location, planning controls, overlays, site conditions and proposed design. This is reviewed during the early site-fit stage.

The site-fit study should identify whether planning approval is likely and what that means for scope, fees and programme.

Yes, within reasonable limits.

The purpose of the collection is to provide an efficient starting point, not a fixed plan. Major changes may mean the project is better treated as a bespoke commission.

Any permitted use of Sunpath design material is defined in the written agreement for the project.

A client does not receive permission to reproduce, document or construct a design simply by viewing it online or commissioning an initial study.

For adaptable design projects, it may substantially reduce or replace the usual bespoke concept design stage. The intention is to test an existing Sunpath design type on your site and establish whether it can be adapted efficiently.

If the site, brief or planning constraints require a fundamentally different solution, the project may need to proceed as a bespoke architectural commission.

If the study confirms that an adaptable design is suitable, the project can usually move into design development rather than restarting with a full bespoke concept design stage. From there, the process may include planning documentation if required, construction documentation, consultant coordination, builder or supplier pricing, building permit documentation and construction-stage services if appointed.

Later fees depend on the actual scope of work. The site-fit study helps establish how much of the existing design can be reused, how much redesign is needed, whether planning is required, what consultants are needed, what construction system is preferred and how much documentation must be adapted or prepared.

Once those matters are clearer, Sunpath can provide a staged fee proposal for the next phase.

Potentially, yes. Where an existing design type can be substantially adapted rather than starting again from a blank page, parts of the design, documentation and technical thinking can be reused.

The level of saving depends on how closely the selected design fits the site and brief. Major changes, complex planning issues or a substantially expanded scope will reduce the efficiency of the adapted-design pathway.

Depending on the site and scope, additional consultants may include a land surveyor, structural engineer, geotechnical engineer, building surveyor, energy assessor, Passive House certifier, blower-door testing provider, town planner, arborist, bushfire consultant or civil / stormwater engineer.

The site-fit study helps identify which consultants are likely to be required.

Potentially. If the design direction is established early and the selected design type suits the site, the project may move more quickly toward design development, approvals, builder pricing and a costed building contract.

Planning requirements, consultant availability, builder pricing, site conditions and client decisions can still affect the overall programme.

Preliminary pricing may be sought after the site-fit study or early design development. A fixed builder contract usually requires more detailed documentation, consultant input, specifications and confirmation of approvals.

The purpose of the early study is to avoid spending heavily on documentation before the project direction and budget have been tested.

These designs have been considered to minimise wasted space and maximise efficiency of common materials, sizes, modules and engineering spans etc. 

We simplify, reduce and repeat components such as glazing modules for efficiency and ease of transportation.  

A simple, efficient design and reuse of developed construction knowledge may assist with earlier costing and reduce avoidable complexity. 

Final construction cost depends on site conditions, floor area, finishes, market pricing, approvals, selected construction method and builder quotation.

No. Passive House or PHI Low Energy Building certification is optional and requires independent certification, project-specific modelling, documentation review, construction evidence and testing.

Some clients may instead choose a Passive House-informed low-energy pathway with selected modelling, airtightness measures, heat-recovery ventilation and blower-door testing, without formal certification.

Prefab and modular companies generally provide design-and-build services tied to their own construction system, factory capacity and contract model.  The designs costs are concealed in the overall construction cost and some companies seek to lock you in exclusively before adding hidden costs.  

Sunpath provides independent architectural design and performance advice. We can work with suitable prefabrication companies, SIPs suppliers, engineered-timber fabricators or conventional builders, but the design and procurement pathway are selected to suit the project rather than predetermined by one supplier.

Yes, where the site and planning controls are suitable. Dual-occupancy, subdivision and townhouse projects require additional consideration of access, private open space, overlooking, parking, services, planning controls, construction cost and likely market value.

If the project grows beyond the agreed scope, fees may need to be reviewed before further work proceeds. This may apply where the floor area increases, additional buildings or major site works are added, more design revisions are required, the project departs substantially from the selected adaptable design, or the construction budget increases materially.