Thornhill — City of Vaughan / City of Markham (split jurisdiction)
Custom Home Construction in Thornhill
Some of the last severable mature lots inside the 407 sit on Thornhill’s oldest streets — sixty- to ninety-foot frontages carrying modest post-war houses, minutes from Yonge. For families wanting a new home without leaving the neighbourhood, the play is often a teardown; for others, a severance that yields two premium building lots.
We manage both paths as builder and guide: feasibility, severance and variance applications where warranted, demolition, architecture and a Tarion-warranted custom build — all inside one engagement.
The Thornhill twist is jurisdiction. A new home in Thornhill Woods answers to Vaughan; one near the historic village core answers to Markham, possibly with heritage oversight. We navigate whichever applies to your dirt.
- Serving
- Thornhill Woods · Patterson · Brownridge · Thornhill Village · Royal Orchard
- Permits
- City of Vaughan / City of Markham (split jurisdiction)
- Response
- Within 24 hours
- Warranty
- 5-Year workmanship
Builders who read Thornhill lots correctly
Infill on mature streets is unforgiving work: protecting fifty-year trees the bylaw will not let you lose, shoring beside neighbours who are three metres away, and massing a new house so it belongs on a street built across five decades. Our portfolio of completed Thornhill-area infills means the learning happened on our projects, not yours.
On severance candidates we quarterback the whole file — planners, surveys, servicing studies and committee hearings — then price both resulting builds so you can weigh selling a lot against building on it. Few builders offer that analysis; fewer still can execute every stage of it.
Severances, permits and two city halls
A new Thornhill home requires demolition and building permits from the city that governs your side of Yonge Street — Vaughan Building Standards to the west, Markham to the east — each with its own zoning bylaw shaping height, coverage and setbacks. Complete custom-home applications typically clear review in three to six weeks; minor variances add three to four months through the relevant Committee of Adjustment.
Severance applications run through the same municipal committees and realistically take eight to fourteen months from filing to registered lots. Near the historic core, Thornhill Village’s heritage conservation district — administered by Markham — reviews demolition and new construction for streetscape fit, and lots along German Mills Creek add TRCA clearance. We sequence every application in parallel where the rules allow, because on infill projects the calendar is the real currency.
New homes delivered in Thornhill
- Royal Orchard
Severance and twin custom builds
A 118-foot lot severed into two, with a pair of complementary 4,200 sq ft homes designed so neither reads as half of anything.
- Thornhill Village
Heritage-district replacement home
A new residence shaped to the district’s Victorian rhythms — gabled massing, deep porch, brick detailing — concealing a fully contemporary interior.
- Brownridge
Golf-course custom residence
A 5,600 sq ft home with a stone-and-black-metal elevation, elevator-ready shaft and rear glazing framing the fairway greenery.
Client Words — Thornhill
“The severance took eleven months and I doubted it weekly. Their planner kept the file moving, and the two houses they built sold the street on the whole idea.”
“Building in the heritage district meant every exterior detail was scrutinized. Their first submission passed. The committee actually complimented the porch design in writing.”
Frequently Asked Questions
Service Area — Thornhill, Ontario
Start Your Thornhill Project
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(647) 876-4070Site visits across Thornhill within the week. Estimates are fixed-scope and itemized.
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