Passive House
Builder Sydney
Marvel Homes builds PHI-certified passive houses across Sydney. Two engineers on every project. We build five to eight homes a year, by choice.
What PHI certification actually means
Most builders in Sydney claim to build sustainably. Very few build to a standard that gets independently verified. PHI certification (from the Passive House Institute in Germany) is the only residential standard that requires a third-party certifier and a blower door test on the finished building. You either pass or you do not.
The PHI standard is not a software tick-box. It means the insulation is continuous (no cold bridges), the windows are double-glazed, the building envelope holds at 0.6 air changes per hour under pressure, and fresh air is supplied continuously through a heat recovery ventilation (HRV) system that recovers 85 to 95% of thermal energy from the outgoing air.
The result is a home that sits at 22 degrees year-round while needing far less heating and cooling than a standard Sydney home. No mould. No condensation. Continuous fresh filtered air. Energy bills that are roughly one-fifth of what you would pay in a standard Sydney home.
Classic, Plus and Premium
Every certified passive house meets the same core standard: a heating demand at or below 15 kWh per square metre a year, airtightness at or below 0.6 air changes per hour, and verified year-round comfort. The Passive House Institute then grades the home into one of three classes, based on its renewable primary energy (PER) demand and how much renewable energy it generates on site.
A fully certified passive house: maximum comfort and efficiency, without renewable generation.
Over a year, the home generates roughly as much renewable energy as it uses. Near net-zero in operation.
Generates significantly more renewable energy than it consumes across the year.
Class thresholds (renewable primary energy demand and on-site generation) per the Passive House Institute building certification criteria. See also Passipedia: The Passive House Classes.
Wondering what this means day to day? Passive House vs a 7 Star home→Most Marvel homes reach Passive House Plus
With rooftop solar added to the passive house envelope, most of our projects achieve Passive House Plus. Across a year they generate close to as much clean energy as the household uses. The home stays comfortable on a fraction of the energy of a standard build, and the solar covers much of what is left.
Our Lilyfield, Riverwood, Dundas and Warrawee homes are all certified Passive House Plus.
- Generates roughly as much renewable energy as the home uses over a year
- Lower energy demand than a Classic passive house
- Strong protection against rising energy prices
- The same certified comfort, air quality and 0.6 ACH airtightness as every passive house
How a passive house gets built
Five stages, one team. We manage each phase directly, so nothing is lost between design and delivery.
Site investigation
Geotechnical report, survey, planning constraints, heritage checks. We review everything before committing to a design.
Design
PHPP energy modelling, orientation, window placement, thermal mass. Designed to meet PHI certification, not just look good on a render.
Approvals
CDC or DA pathway depending on your site. We manage the consultants and the paperwork.
Construction
Around 62 weeks. Airtightness membranes, continuous insulation, double glazing, HRV installation. A principal on site for every critical stage.
Certification
Blower door test, third-party certifier sign-off, PHI certificate issued. Then handover.
Not sure if your block suits a passive house? We will tell you on the first call, before any design work begins.
Mo and Ibrahim on every project
Mo Amin is a civil engineer and Licensed Builder in NSW (Licence #330031C). He reads geotechnical reports himself, reviews the structural drawings, and manages the construction programme. Ibrahim Amin is a mechanical engineer, Licensed Builder and Certified Passive House Tradesperson (CPHT). He handles the airtightness detailing, the HRV system design and commissioning, and the blower door test.
Together they have built passive houses on narrow inner-city lots in the Inner West, sloping blocks on the Upper North Shore, and constrained sites across South Sydney. Each project is personally managed, not handed to a site supervisor you have never met.
Our Lilyfield project
Lilyfield is a completed passive house in Sydney's Inner West. It is a narrow-lot build on a site that required careful civil engineering to manage the foundation conditions and party wall obligations. The home achieved PHI certification at practical completion. It is a good example of what is achievable on a constrained urban site when the engineering and the passive house detailing are handled by the same team.
Lilyfield, Inner West Sydney. Certified passive house, completed by Marvel Homes.
questions
Frequently asked about certified passive houses.
What is a certified passive house builder?
A certified passive house builder is a builder who constructs homes to the Passive House Institute (PHI) standard and has the technical team to verify performance at completion. PHI certification requires independent third-party verification, a blower door test at 0.6 ACH or below, and full energy modelling using PHPP software. Marvel Homes has Ibrahim Amin, a Certified Passive House Tradesperson (CPHT), on every project we build.
How much does a passive house cost in Sydney?
Marvel Homes builds passive houses with construction budgets from $900K to $2M+. A certified passive house typically costs 15 to 20% more than a standard home of the same size, primarily due to the insulation, double-glazed windows, and airtightness measures. Much lower running costs over the life of the home offset much of this. We do not give ballpark numbers without reviewing your site, brief, and planning constraints.
How long does a passive house take to build in Sydney?
The construction phase runs around 62 weeks. Before construction, allow around 6 weeks for design development, around 4 weeks for colours and selections, and approvals running from 6 weeks (CDC) to 4 months (council DA) depending on your block.
What is the difference between passive house and a 7-star NatHERS rating?
The 7-star NatHERS rating is the minimum compliance requirement under the National Construction Code. It models thermal performance on paper but does not verify what is actually built. Passive house (PHI) certification is four to five times more stringent and involves third-party verification and a blower door test on the completed building. A 7-star home still relies heavily on mechanical heating and cooling to stay comfortable. A passive house holds 22 degrees year-round on only a fraction of that heating and cooling.
Do you build passive houses across all Sydney suburbs?
Yes. Marvel Homes builds across Greater Sydney, from the Inner West and Eastern Suburbs through to the North Shore, Northern Beaches, Strathfield, Parramatta, and the Hills District. We work on sloping blocks, narrow lots, heritage-affected sites, and knock-down rebuilds. Mo Amin's civil engineering background means complex sites are manageable, not a problem.
What passive house projects has Marvel Homes completed in Sydney?
Marvel Homes has been involved in more than 10 passive house projects across Sydney. Our Lilyfield project in the Inner West is one completed example: a custom home on a narrow lot with full passive house certification. We build five to eight homes a year by choice, with a tight team and Mo and Ibrahim across every build.
Is it a fit
Five to eight homes a year, by choice.
That means we are honest about fit before you spend. Here is who a passive house tends to be right for, and who it is not.
- —Your budget is in the $900K to $2M+ range for construction, and you want it spent well.
- —You are planning around a 14 to 22 month timeline, not trying to start next month.
- —You value measured comfort, health, and running cost over the lowest headline price.
- —You want the cheapest quote and are not concerned with what it includes.
- —You need a fixed build price today, before anyone has reviewed your site.
Not sure where you sit? The lowest-risk first step is a builder-agnostic site assessment. You own the report, whoever you build with.
Different ways into the same standard.
Whatever you call it, the build is the same: measured, airtight, ventilated. These pages explain each angle, depending on what matters most to your family.
Certified Passive House
Independent PHI certification and what it verifies.
Sustainable Homes
Sustainability as measured numbers, not brochure language.
High Performance Homes
Passivhaus-level comfort without the certification paperwork.
Energy Efficient Homes
The efficiency ladder, from 7-star to passive house.
Healthy Homes
Filtered fresh air, stable humidity, no mould.
Passive House Designer
The independent designer who models and certifies your home to PHI.
Ready to talk about your site?
We build five to eight homes a year, by choice. Send us your block and brief and Mo will tell you quickly whether it is a fit.