Premium materials, owner-supervised installs, written warranties across Markham.
Buildoreno installs and replaces metal and flat roofs across Markham — Unionville, Cornell, Berczy Village, Cathedraltown, Markville, Milliken, Thornhill, and Box Grove. 25+ years of GTA roofing, owner-operator Patrick on every project, licensed Ontario contractor, $5M liability insurance, WSIB-covered. Standing-seam metal, metal shingles, TPO, EPDM, asphalt shingle, leak repair, and full replacements. Written 5–10 year warranty, $0 down. Free written estimate within 2 hours. Call (647) 254-0877.
Standing seam, metal shingles, and corrugated. 40–50 year lifespan. The premium choice for executive Cornell and Cathedraltown homes seeking long-term differentiation.
TPO, EPDM, modified bitumen. Markham applications: contemporary infill builds, attached garage roofs, rear additions, architectural flat sections on modern designs.
24-hour response across Markham during business days. Honest diagnostic — we tell you the cheapest correct fix, in writing, before any work begins.
Tear-off + re-roof in one window. York Region permit handling, deck assessment, ice-and-water shield, and underlayment upgrade included. Most Markham replacements complete in 3–5 working days.
Markham combines historic Unionville character homes with newer executive subdivisions in Cornell, Berczy Village, and Cathedraltown. Homeowners here typically invest in long-term materials — Markham is one of our highest standing-seam metal markets. York Region permits are predictable when contractors file them properly; we handle every Markham permit application in-house.
Anonymised representative project examples from past Markham work. Your home will be priced based on a free on-site assessment — no two roofs are identical.
Standing seam, metal shingles, permits — full 2026 pricing breakdown.
View guideTPO, EPDM and modified bitumen pricing for flat sections and additions.
View guideBrowse every roofing, landscaping and renovation cost guide we publish.
View guideMarkham roof replacements typically run $14,000–$38,000+. Architectural asphalt: $14k–$20k. Metal shingles: $20k–$30k. Standing-seam metal: $26k–$42k+. Cornell and Cathedraltown executive homes with multi-plane roofs can exceed $50k. Every Buildoreno Markham quote is itemized in writing.
Yes, the City of Markham (York Region) requires a building permit for most roof replacements involving material change or structural work. We file every York Region permit ourselves. Typical issuance is 5–10 business days for residential roofing.
Yes. Unionville's character properties often require heritage-appropriate materials and finishes. We work with Markham's heritage requirements and have completed installations on multiple Unionville character homes — references available.
Free assessments scheduled within 48 hours. From signed agreement to install, typical Markham timeline is 3–5 weeks depending on permit timing and material lead time. Standing-seam metal has the longest lead time; asphalt shingles ship within a week.
Standard manufacturer warranty (25–50 years for metal, 15–30 years for asphalt) plus Buildoreno's own 5–10 year workmanship warranty in writing. We don't subcontract — the same crew that installed your roof is who we send back if anything ever needs attention.
Response within 2 business hours. On-site assessment within 48 hours. Written itemized estimate within 48 hours of assessment. $0 down, milestone-based payments, written warranty. Call (647) 254-0877.
Call (647) 254-0877