Ontario's Plain-English Guide to Custom Home Building📞 705-533-1633 | ☎️ 1-866-868-6606 | ✉️ info@icfhome.ca
Find a BuilderOttawa & Ottawa Valley
Custom Home Builders in Ottawa and Ottawa Valley
Ottawa, Renfrew and Lanark counties, Prescott-Russell and Stormont, Dundas and Glengarry.
Established builders who build complete custom homes on your land in Ottawa and Ottawa Valley, listed against our published standard.
Builders in Ottawa and Ottawa Valley
Every builder below showed dated public activity from November 2024 or later when we checked in November 2026. These are free listings compiled from public information. None of them has been vetted by BuildersOntario.com yet. Any builder can upgrade to a vetted listing: it confirms its HCRA licence and insurance to us, and we research it to make sure it fits.
GreelySanchez HomesSite-specific custom homesOttawaRND ConstructionCustom homes, including infill and energy-efficient homes; renovationsOttawaEkoBuiltTurnkey custom passive house and net-zero homesCarpTSH Custom HomesCustom new homes; major renovationsLanarkThe Lanark Design/Build GroupCustom new homes; additions; renovations; heritage restorationRussellBrian Shane ConstructionCustom homes; additions; renovationsCornwallMenard & RobertsonCustom homes; renovations; commercial constructionOttawaCasa Verde ConstructionCustom homes, cottages, ski chalets, timber frame homesOttawaCrossford ConstructionCustom urban and infill homes; large renovationsCarpThe Conscious BuilderCustom homes (Net Zero, Passive House, off-grid); renovationsOttawaAmsted Design-BuildCustom homes, renovations, additionsOttawaThe Lake PartnershipCustom homes, additions and renovationsStittsvilleTimberCross HomesCustom homes; renovations; project managementKanataSunter HomesCustom homes; models in two estate communities; renovations and additions
Areas this region covers
- Ottawa
- Renfrew County
- Lanark County
- Prescott and Russell
- Stormont, Dundas and Glengarry
Building a custom home in Ottawa and Ottawa Valley: what is different here
Cold winters
Eastern Ontario winters are long and cold. Ask builders how they handle frost protection, air sealing and heating design.
Heat loss calculator
Rural Ottawa and the Valley
Rural Ottawa, Lanark and Renfrew have many lots with a septic system and a well, and some shallow-bedrock lots need a raised septic bed.
Septic and well reality check · Wells and rural water
River and lake lots
The Ottawa River and the region’s many lakes bring floodplain and shoreline rules. Check a lot’s flood history and conservation authority limits before you buy.
Floodplain and conservation authority lots · Buying a waterfront lot
Before you hire any builder
- 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.
Tell us about your project
Where you want to build, whether you own the land, your budget and your timeline. We send it to up to three builders in Ottawa and Ottawa Valley who fit.
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. Paid placements are always labelled. How we choose builders.
