Passive House and Sustainable Design

Runtime:

discussed individually*
Project’s cost:

discussed individually**
Architectural supervision:

discussed individually

* Depends on the Project

** Price depennds on the style and complexity of the Project.

Our European background gives us deep roots in Passive House methodology. We have worked with the standard since its early adoption in Europe and understand both the technical requirements and the design opportunities it creates. A Passive House is not a compromise — it is a higher-performance version of exceptional architecture.

Seattle's climate is well-suited to Passive House design. The combination of high-performance insulation, airtight construction, and mechanical ventilation with heat recovery (MVHR) keeps homes warm and dry year-round with minimal energy input. The same system provides passive cooling during Seattle's increasingly warm summers — without air conditioning.

We use PHPP energy modeling software to simulate building performance before construction begins, verifying that every design decision contributes to the certified performance target. Our designs are developed in close collaboration with PHIUS-certified consultants and structural engineers experienced in Passive House construction detailing.

Our portfolio

Copper Hall. Exterior

Apartment for Cosmopolitan

Lesnoe

Mansion for the Leader

House for Cosmopolitan

Stages

01

04

Energy Analysis and Brief

We begin with a thorough energy analysis of your site — solar orientation, prevailing winds, shading, and local climate data. Combined with your brief, this informs every design decision and establishes the performance targets for your Passive House project.

02

04

Integrated Design and Certification Planning

Our team develops an integrated design where architecture, structure, and building systems work together to achieve Passive House standards. We model energy performance using PHPP software and plan the certification pathway with accredited consultants.

03

04

Technical Documentation and Permits

Full working drawings incorporate Passive House details: thermal bridge-free construction, triple-glazed windows, airtight membrane systems, and mechanical ventilation with heat recovery (MVHR). All documentation meets Washington State energy code and Passive House Institute requirements.

04

Construction Quality Assurance and Blower Door Test

We supervise construction with a focus on airtightness and thermal continuity. Critical junctions are inspected at every stage. The completed building undergoes a blower door test to verify performance, ensuring your home achieves the certified Passive House standard.

Q&A

How much more does a Passive House cost compared to a conventional home?

A Passive House typically costs 5-15% more upfront than a conventional home of similar size and quality. However, energy savings of 60-80% on heating and cooling costs mean the investment pays back within 7-12 years — while delivering superior comfort, air quality, and resilience throughout.

Is Passive House suitable for Seattle's climate?

Absolutely. Seattle's mild, rainy climate is well-suited to Passive House design. The combination of high insulation, airtight construction, and heat recovery ventilation keeps homes warm and dry year-round with minimal energy input — and the same system provides passive cooling during Seattle's increasingly warm summers.

Can an existing home be renovated to Passive House standard?

Yes — this is called EnerPHit, the Passive House standard for retrofits. We assess your existing home, develop a phased retrofit plan, and can achieve near-Passive House performance through targeted improvements to the building envelope, windows, and ventilation systems.

Do you work with Passive House certified consultants?

Yes. We collaborate with PHIUS-certified consultants and use PHPP energy modeling software on all Passive House projects. We manage the certification process from design through blower door testing to final certification documentation.

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Waterfront Home Design

Contact us

noreply@dezzign.com.ua
+380952226547, +14254719496
Seattle, USA & Kharkiv, Ukraine
Mon - Sat: 9.00 - 20.00

Passive House and sustainable design represent the future of luxury residential architecture in the Pacific Northwest. At DeZZign, we integrate Passive House principles — superior insulation, airtight construction, heat recovery ventilation, and optimized solar gain — into architecturally refined homes that are as beautiful as they are efficient. Seattle homeowners benefit from dramatically reduced energy costs, exceptional indoor comfort, and a significantly lower environmental footprint.

The Passive House standard originated in Germany and has been refined over three decades of cold-climate building research. It sets precise, measurable performance targets: annual heating demand under 15 kWh/m², airtightness below 0.6 ACH50, and primary energy consumption under 120 kWh/m²/year. These are not aspirational goals — they are certified, verified outcomes.

At DeZZign, we design the complete Passive House architectural package — concept, energy modeling, technical documentation, and material specifications. We work with experienced licensed contractors who build to our drawings and coordinate all permitting requirements with local authorities.