passive house questions

Everything you need to know

Designing and building a passive house is a complex process. From design advice, to information on planning your build, explore expert advice from the Marvel Homes team.

passive house Q&A

pricing questions

pricing a passive house

Our Passive house builds range from $2800 to $3800 per sqm with top-level inclusions, finishes, CDC approval fees and custom design costs.

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Initial quotes can be vague, so we offer feasibility proposals instead.

Quotes aren’t very precise in our experience when building a family home. The devil is in the details and the projects success starts at the early stages, therefore we offer “feasibility proposals” to protect your time and investment from the beginning, through a comprehensive and very detailed cost of construction for your specific custom floor plan sited to your lot.

A Passive house is a set of principles in building more energy, heathy and sustainable homes. These principles are based on specific equations, materials and construction details. 

Doing just enough, to what the budget allows, will cause more risk to your project final outcome than good. In our experience, it’s best to reduce the house footprint and build it right from the first time.

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Sustainable upgrades and a Passive House are completely different finished products. Such comparisons are misleading, as the products are very different, the only thing that links them are the use of keywords such as “sustainability”. However our pre-certified Passive House designs, all are built to the passive house standards and they start from $650K.

In theory it sounds like a fair and reasonable approach. From our experience it creats room for disputes and more critical room for design complications, when high performance house are built, there has to be modelling carried out to ensure the property is we ventilated for the occupants. Therefore we suggest reducing the design or looking at our online designs, they start from $650K

Yes, this is what we offer at our feasibility proposal stage. We modify the design to suit your budget, land and approvals pathway.

There are 3 types of variations:

Client Variations

If the client request additional work or change to scope after the plans are signed of and site construction started. This would attract costs, that will only be quoted at the time of scope details are known

Construction Variations

Construction variation occurs due to unfinished engineering reports or the foundation being too complicated. Our Feasibility Proposal captures and highlights all construction variations well ahead of time to correctly manage such costs, in which you are guided and well informed about well ahead of time

Approvals Variation 

Approval variations are related to your DA consent conditions, which council force on the build. Such things are only known after council consent is granted, and will be quoted accordingly, ahead of time and prior to construction commencement.

Read more about how we manage variations…

Design Questions

designing a passive house

Yes, we can build on sloping sites.

Of course. If you would appreciate better financial control over your build costs, we recommend starting with one of our pre-designed passive house models. These designs have been pre-costed, ready to be personalised to your needs.

Yes, we are a custom home builder. We work with architect supplied plans. Marvel Homes Passive House Designs can also be modified to meet client site requirements.

A thermal bridge occurs when steel members act as an energy bridge between the interior and the exterior of a building. This can be minimised at the design stage either by reducing the steel through a clever design solution or by using special insulation material to break the energy bridge.

Sydney can experience high humidity. To manage the humidity, we carry out a detailed PHPP report (Passive House Planning Package). Based on our findings, we install the best equipment suitable for your home.

We typically use a centralised HRV/ERV, ducted air-conditioning and a ducted dehumidifier.

Yes, we modify our designs and can work on small, tight sites. 

Check out our pre-certified Passive House designs.

We have a feasibility proposal guide. It’s a step-by-step process to carefully navigate the early stages of a custom build.

We currently work with Stiebel Eltron, Dantherm or MAICO

We use uPVC double-glazed windows made locally in Sydney. This gives you better service during and after the build if windows need maintenance in the future.

Yes, we have experience with heritage-impacted sites.

Yes, we can work on flood-impacted sites and modify our designs to suit your site conditions.

sustainability Questions

the sustainability of a passive house

We like to help all our clients to achieve the best possible outcomes for their situations and budget. Our certifiable passive builds range from $650,000 to $1.2m for a complete build – browse our designs.

We prefer to achieve certification, which gives our clients peace of mind. Healthier living today and future value when the property is required to be sold along with a certificate.

We need to review the plans and assess the quality and detail of the drawings.

Contact us for a discussion.

Passive Solar is different from Passive House and NatHERS principles. Similarly, they all talk about the same science of energy efficiency. The difference is Passive house is tested and measured on the field and holds the builder accountable.

about marvel homes

we build to passive house standards

Marvel Homes brand was established in 2018. Our director and site manager come from engineering backgrounds with serious technical experience.

Read our story.

Yes, reach out and we can discuss current and finished project, and share our learnings with you.

Yes, all our Passive House builds are certifiable. This gives peace of mind to our clients with the added benefit of future-proofing the asset with the certificate for future sale.

No, this is more targeted at large-scale project homes, which follow the same principle to a degree as that of Passive House, but it’s mainly a scheme to help the big operators adopt and change.

Passive House super exceeds green homes certifications.

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