Keep your family close without compromising privacy, comfort, or independence. UnityHaus manages the entire process — from design and permitting to construction — to create luxury high-performance ADUs for aging parents and adult children.
Typical Passive House wall assembly · R-60+ continuous insulation
Passive House construction delivers comfort that goes beyond square footage — cleaner air, consistent temperatures, and near-total quiet. Built for the people who matter most to you.
Continuous fresh-air ventilation with filtration keeps allergens and pollutants out — critical for aging parents or anyone with respiratory sensitivities.
Triple-glazed windows and a thick insulated envelope reduce outside noise by up to 75% — so everyone sleeps better and lives more peacefully.
No hot spots, cold drafts, or damp corners. The same comfortable temperature in every room, year-round, without running the heating system constantly.
Passive House (Passivhaus) is one of the world's most rigorous energy and comfort standards for buildings. It's not a style — it's a building-science standard engineered to use a fraction of the energy of a conventional build while maintaining a healthier, more comfortable indoor environment year-round. Every UnityHaus ADU is designed and built to the Passive House standard.
Thick, continuous insulation on every surface — walls, roof, and floor slab — eliminates heat loss through the building shell. No shortcuts, no gaps.
A continuous air barrier wraps the entire home and is verified by a blower-door test. Random air leaks — the biggest source of energy waste — are eliminated.
Anywhere two materials meet — a window frame, a foundation edge, a wall corner — heat can sneak out. We engineer every junction to stop that path entirely.
Three panes of glass with thermally broken frames capture free solar heat in winter and reject it in summer — while staying frost-free on the inside.
An HRV unit continuously exchanges stale indoor air for fresh outdoor air, recovering 80–90% of the heat in the process. Fresh air, no energy waste.
UnityHaus handles everything so you don't have to coordinate between architects, contractors, and engineers on your own.
We manage the design process and navigate the permit system in Durham Region, so your project stays on track from day one.
Panelized Passive House construction means precision fit, minimal waste, and a dramatically shorter build timeline than conventional methods.
From the air filtration system to the kitchen finishes, your ADU arrives complete — a true luxury home, not a garden suite afterthought.
Our Oshawa build is a real Passive House ADU for an aging parent — documented at every stage, from design and permitting to the final blower-door test. See exactly what we build and how we build it.
Follow the build →"Every role — engineer, accountant, real estate agent — gave me a different angle on why homes fail their owners. UnityHaus is the answer I kept looking for."
UnityHaus is based in Oshawa, Ontario. The Oshawa ADU project is the company's first complete proof of concept — documented publicly from permit to occupancy so the whole industry can learn from it.
Read Peter's full story →Tell us about your family's situation. We'll walk you through what's possible on your lot and what the process looks like.