Muskoka, Parry Sound & Near NorthFree listing · Not vetted

JS Custom Builders

Custom home builder · Seguin

JS Custom Builders is a Seguin-based builder of custom homes and cottages in the Muskoka and Parry Sound area, also offering ICF foundations and timber framing.

Free listing compiled from public information, November 2026. Not vetted by BuildersOntario.com and not yet confirmed by the builder.

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At a glance

Based in Seguin (Seguin, Parry Sound District)
Region Muskoka, Parry Sound and Near North
Areas served Muskoka, Parry Sound and Georgian Bay (per the company’s website)
Builds Custom homes and cottages; renovations; decks and docks
Construction methods ICF foundations; timber framing
Phone 705-773-8774
Website jscustombuilders.com
HCRA licence Check before you sign: Search the HCRA Ontario Builder Directory
Profile status Free listing, not vetted. Compiled from public information, November 2026. Not yet confirmed by the builder.

Before you hire

  • Look the builder up on the HCRA Ontario Builder Directory. Anyone who builds a new home for you in Ontario must hold an HCRA licence, and the directory shows their licence status and history.
  • Ask for at least three recent completed homes you can drive past, and talk to those owners.
  • Ask for proof of liability insurance and a WSIB clearance certificate.
  • Get the scope, allowances, payment schedule and holdback in a written contract before any deposit.
  • Know your all-in budget first. The custom home cost calculator gives you a starting number.

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About this directory

Who runs this directory: BuildersOntario.com is operated by ICFhome, a custom home builder in Simcoe County and South Georgian Bay. Builders are listed free when they meet our published standard. Payment never decides who is listed. Vetted listings are a paid upgrade, accepted only after we research the company, and are always labelled. How we choose builders.