One accountable team
Our in-house design team, permits, and build crew work under one roof, so design intent carries straight through to the finished space.
Design-build in Thornhill
Duplex Construction in Thornhill
Andare Homes designs and builds duplex construction in Thornhill as one accountable design-build team.
- Licensed, Insured and WSIB-Registered
- Backed by our workmanship warranty
- 5.0 on Google
Get a Quote in Thornhill
Tell us what you need and we’ll get you a quote. 5.0 on Google · Licensed, insured and WSIB-registered · Workmanship warranty · Free, no-obligation quote and site visit.
5.0 on Google
Workmanship warranty, we stand behind our work Licensed, Insured and WSIB-Registered Completed to code and Ontario requirements In-house design team, build by one team Serving the GTA and surrounding area
What GTA homeowners say
5.0 · Verified reviews on Google R Raymond Gafoovia Google
★★★★★
Fantastic experience with them! The team was professional, attentive, and delivered high-quality work on time and within budget. Highly recommend for anyone building or renovating their home!
S Simon Carrionvia Google
★★★★★
Andare did an amazing job renovating my house, they turned an old and boring basement into a modern and exciting place. Their attention to detail was astounding and I couldn't be happier with the results.
L Luka Stankovicvia Google
★★★★★
Andare took our outdated house and turned it into a modern, functional space. The new addition blends seamlessly with the existing structure.
P Paul Robinsonvia Google
★★★★★
The attention to detail is incredible. The Andare team has just finished building my home and I'm absolutely blown away. I've been living in here for just under a month now and I still haven't found a single flaw, you can really see their experience and craftsmanship in every part of the home.
I Isa Siddiquivia Google
★★★★★
Our basement went from an unfinished storage space to a fully functional family room. Amazing transformation, 5 stars, 100% recommend.
E Emily Carbonel Toothvia Google
★★★★★
Andare delivered excellent quality and great service. The team was professional and made everything easy.
Why Andare Homes
Duplex Construction in Thornhill, done right
Built to last
Quality materials and proven detailing chosen for how you live, finished to the Ontario Building Code and built to hold up for the long run.
Quote-ready
Share your plans, photos, or ideas and get a free, no-obligation site visit and estimate with no guesswork.
Code-conscious
Design, permits, and construction handled in accordance with Ontario requirements and your municipality.
Our Process
Our Process
- 01 Tell us about your project, your goals, photos, ideas, or plans you already have.
- 02 Our in-house design team shapes the design and handles the permits, then we quote and schedule the build.
- 03 Our crew builds it, coordinating every trade so the work runs cleanly and on plan.
- 04 We finish the Thornhill home to the Ontario Building Code, hand it over clean, and stand behind it with our 2-year workmanship warranty.
Local Context
Duplex Construction in Thornhill
What duplex construction includes
The scope can include site review, zoning and permit coordination, foundation, framing, two kitchens, two bathrooms, separate entries, laundry planning, mechanical and service coordination, fire separation, acoustic separation, egress, finishes, inspections, and handover.
New duplex construction allows the building to be planned correctly from the start. That is different from forcing two units into a house that was never designed for them.
Designed for two households
Before drawings are finalized, Andare plans unit sizes, stair or entry locations, privacy between homes, storage, natural light, kitchen function, bathroom routes, and maintenance access.
For Toronto and GTA lots, the best duplex plan depends on frontage, depth, parking, servicing, zoning, and how the building should address the street.
Permits, inspections and warranty
Duplex construction needs municipal approval, inspection planning, consultant input, and code-aware detailing. Andare coordinates the new-build process with clear documentation, scope control, and defined handover standards on every project.
Process
- Property, zoning, and unit-goal review
- Two-suite design and consultant pathway
- Duplex permit package and construction sequencing
- Foundation, framing, services, and separations
- Kitchens, baths, finishes, and inspections
- Handover and closeout
What Andare clients say
The Andare team has just finished building my home and I'm absolutely blown away.
The attention to detail is incredible.
Amazing team of home builders, I would recommend them to anyone!
Duplex Construction in Thornhill: what shapes the work
Thornhill spans established Vaughan and Markham residential areas with older village character, mature subdivisions, ravine influence, larger family homes, townhouses, and infill or renovation demand. This layer should be used with the correct municipal slug and approval path. Common work includes kitchens, bathrooms, basements, additions, custom-home planning, exterior upgrades, in-law layouts, structural changes, and family-space improvements.
Thornhill is not a Toronto page. Depending on the property, local review may sit with Vaughan or Markham. Toronto suite, laneway, garden-suite, and multiplex assumptions should not be used unless the project is actually in Toronto.
Thornhill projects often involve mature lots, older house conditions, ravine influence, and larger family needs. Design-build helps compare renovation, addition, basement, and custom-home paths before the scope is fixed.
For Thornhill homeowners, Andare's design team can connect layout, family-space goals, finishes, storage, exterior changes, and consultant input before the project moves toward municipal review.
Andare supports Thornhill homeowners across Vaughan-side and Markham-side residential areas, including mature-lot streets, family subdivisions, ravine-influenced properties, and townhouse pockets. Andare keeps duplex construction tied to the home in front of us, not a generic city-wide template.
More in Thornhill
Everything we design and build in Thornhill
Design-build services across Thornhill. See all services in Thornhill →
- Duplex Conversions in Thornhill
- Triplex Construction in Thornhill
- Accessibility Renovations in Thornhill
- Accessory Dwelling Units in Thornhill
- Basement Renovations in Thornhill
- Basement Underpinning in Thornhill
- Bathroom Renovations in Thornhill
- Century & Older-Home Renovations in Thornhill
- Coach House Conversions in Thornhill
- Coach Houses in Thornhill
- Condo Renovations in Thornhill
- Custom Homes in Thornhill
Our Work
View Our Projects See real projects across Toronto and Ontario
Custom homes, additions, renovations, and multiplexes, designed and built for homeowners, builders, contractors, and property teams.
Start your duplex construction in Thornhill with Andare
Book a consultation with Andare Homes. Our in-house design team and design-build crew plan, design, permit, build, and finish your project as one accountable team, licensed and insured, rated 5.0 stars from 55 reviews.
Backed by our workmanship warranty, we stand behind every job · Licensed, Insured and WSIB-Registered
Send your project details
Tell us what you need and we’ll get you a quote. 5.0 on Google · Licensed, insured and WSIB-registered · Workmanship warranty · Free, no-obligation quote and site visit.
Duplex Construction Near Thornhill
View all service areas →Andare Homes provides duplex construction, designed and built by one accountable team across Toronto and surrounding Ontario communities.