High performance Building
Passive House & High-Performance Building Solutions.
At BBG Built, we’re passionate about high-performance building — creating smarter, more efficient, and healthier homes for New Zealanders. Our approach is grounded in proven building science and modelled design, tailored to your specific project and climate.
We help homeowners, developers, and investors build homes that deliver superior comfort, exceptional energy efficiency, and long-term value. Whether you’re planning a compact family home, a secondary dwelling, or a sustainable investment property, a high-performance build offers a better way to live in Aotearoa.
What Is a Passive House?
A Passive House is designed and constructed to maintain consistent indoor comfort throughout the year — requiring minimal energy for heating or cooling. These homes are built to exacting standards, achieving exceptional thermal performance and airtightness through intelligent design and verified modelling.
To achieve full Passive House certification, a building must meet a set of performance criteria covering heating demand, airtightness, and overall energy use.
But certification isn’t the only path to building better.
What Is a Passive House?
Not every project needs to meet full Passive House standards to achieve significant gains in comfort and efficiency. Many of the same design principles can be applied to traditional timber-framed homes or renovation projects to dramatically improve performance.
We can incorporate:
Thermal bridge-free design
Improved airtightness
Mechanical ventilation with heat recovery (MVHR)
High-performance insulation suited to your climate zone
At BBG Built, we work with you to find the right balance — guiding your design and construction choices so you gain the benefits of modern building science, even if full certification isn’t your goal.
Benefits of SIP Passive House Construction
We collaborate with trusted Structural Insulated Panel (SIP) providers to deliver efficient, durable, and energy-smart homes. SIP construction provides a precision-engineered building envelope with outstanding performance across every key area:
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Rapid and efficient on-site assembly
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Superior thermal insulation and airtightness
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Built-in compatibility with MVHR systems
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Thermal bridge-free detailing for consistent comfort
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High-performance windows for reduced noise and heat loss
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Lower energy costs and carbon emissions over the home’s lifetime
Why Build Above the Code?
New Zealand’s building code sets a minimum standard, not a benchmark for comfort or efficiency. As energy costs rise and expectations shift toward warmer, healthier homes, choosing to build above code delivers tangible benefits:
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Cleaner, healthier indoor air through filtered ventilation
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Lower power bills with reduced heating and cooling demand
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Consistent comfort in every room, year-round
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Long-term durability through high-quality materials and detailing
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Reduced environmental impact through energy-efficient design.
Built for New Zealand Conditions
In the South Island — where winters are long and cold — building with performance in mind from day one makes all the difference. By applying proven Passive House principles, we’re setting a new standard of living comfort for Kiwi families.
If you’re planning a new build or renovation, talk to BBG Built about how we can help you create a healthy, low-cost, high-performance home designed for life in New Zealand.
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BBG BUILT
Cost Estimate Worksheet
What does your house actually cost — build day vs. every day after?
Adjust the numbers to your project. Defaults are based on a real 200m² Christchurch-relevant worked example — the running-cost side is calculated live as you change the inputs.
Important assumption: the energy-use figures for both the standard build and the high-performance build assume the entire conditioned floor area is heated to a consistent 20°C, year-round. The figures here are a like-for-like comfort comparison, not a prediction of what any specific household currently spends.
Your Build
Default is the 2025 NZ national average. Replace with your own BBG Built quote when you have one.
Placeholder only — there's no single honest NZ-wide figure for this. BBG Built will give you a real number once we've scoped your build.
Your Running Costs
National average ~39–40c/kWh. Canterbury winters can push usage above the national average.
NZ code-minimum homes run 150–200 kWh/m²/yr nationally. Christchurch's colder climate zone puts it above the national average — this default is set toward the higher end accordingly. Adjust if you have a project-specific figure.
Default reflects a Passive House using ~3,000 kWh/yr for the same comfort — roughly 90% less.
The Numbers
$0
Extra cost to build
$0/yr
Energy cost saved, every year
— yrs
Years to pay back the premium
Over 30 years of ownership, that's roughly $0 in energy costs you could choose to redirect — for example, toward principal mortgage repayments —
Worth thinking about: some homeowners choose to redirect ongoing energy savings like these toward their mortgage's principal repayments, which can reduce the interest paid and shorten the loan term over time. The actual effect depends on your loan structure, interest rate, and repayment terms — this isn't financial advice, so talk it through with your mortgage adviser or lender to see what it could mean for your specific situation.
These are your numbers, not ours. Want the real figures for your actual site, plans, and budget?
Book a Discovery Call →Default build-cost figure based on Stats NZ / BRANZ-derived national averages (2025). Default standard-build energy use is set toward the higher end of the published 150–200 kWh/m²/yr national range for code-minimum homes, reflecting Christchurch's colder climate zone classification. Default high-performance energy use (15 kWh/m²/yr) reflects the published Passive House standard heating demand limit. Electricity pricing based on MBIE Quarterly Survey of Domestic Electricity Prices. This calculator gives an indicative estimate only and does not constitute a quote, and does not constitute financial or lending advice. The build premium is a user-adjustable placeholder, not a BBG Built quoted figure. Any reference to redirecting energy savings toward mortgage repayments is illustrative only — actual outcomes depend on individual loan terms, interest rates, and lender policy. Speak to a qualified mortgage adviser or financial adviser before making borrowing or repayment decisions.
Sources
- Stats NZ / BRANZ building consent value data, cited via MoneyHub NZ, "What's the Average Building Cost Per Square Metre?" (2025) — national average build rate.
- Passive House Institute (PHI) Building Criteria — yearly heating energy demand limit of ≤15 kWh/m²/yr conditioned floor area, as referenced in Sustainable Engineering Ltd's Passive House technical criteria reference (26 Feb 2025).
- PHINZ High-Performance Construction Details Handbook (Sustainable Engineering Ltd / Passive House Institute New Zealand, BRANZ co-authored, 04.22) — NZ climate zone classifications, including Christchurch's "CC" zone designation.
- Industry-published code-minimum heating energy use range (150–200 kWh/m²/yr nationally) — Quality Build / PHINZ-aligned industry sources.
- MBIE Quarterly Survey of Domestic Electricity Prices (QSDEP) — national average electricity pricing.