Home additions

The best home addition contractors in Canada, city by city

Updated 14 cities130 firms ranked

Firms that add space to an existing house: rear and side additions, second storeys and rooms built over the garage. Each city has its own list of up to 10 home addition contractors, weighed on Google rating, the number of reviews behind it, how closely each firm's services match home addition work, and its portfolio.

Home additions by city

Each city's list, with the firm ranked first on it.

British Columbia

  • Home additions in Vancouver Metro Vancouver, BC
    Major HomesFamily-run Vancouver builder of custom homes, duplexes, multiplexes and laneway houses, working across Greater Vancouver and the Fraser Valley.
    4.9
  • Home additions in Burnaby Metro Vancouver, BC
    Rechsteiner Signature HomesVancouver design-build firm doing modern custom homes and major renovations, including heritage houses and condos, across Burnaby and Coquitlam.
    5.0
  • Home additions in Langley Metro Vancouver, BC
    Bali Brothers ConstructionLower Mainland general contractor building high-end custom homes and handling renovations and additions, aimed at busy professionals and entrepreneurs.
    4.9

Prairies

  • Home additions in Calgary Calgary Region, AB
    Right Choice ConstructionCalgary renovation company centred on basement development, also doing kitchens, bathrooms, home and garage additions and exterior work.
    5.0
  • Home additions in Edmonton Edmonton Region, AB
    DPAD HomesEdmonton home builder whose work takes in custom homes and home additions.
    4.9
  • Home additions in Regina Southern Saskatchewan, SK
    All-Fix Construction & RenovationRegina construction and renovation company that takes on home additions and general contracting work.
    4.9

Ontario

  • Home additions in Toronto Greater Toronto Area, ON
    Route HomesCustom home builder based in Concord, Ontario, also working as a general contractor and interior construction contractor.
    5.0
  • Home additions in Mississauga Peel Region, ON
    Rock Cliff Custom HomesFamily-run builder of custom homes, cottages, renovations and heritage restorations in Oakville, Burlington, Mississauga and the Muskoka region.
    4.9
  • Home additions in Brampton Peel Region, ON
    Hassanpuri Construction & RenovationConstruction company based in Brampton, Ontario, taking on home additions.
    4.9
  • Home additions in London Southwestern Ontario, ON
    Evergreen Design + BuildLondon, Ontario design-build firm doing full-home renovations, home additions, kitchens, bathrooms and basements, as well as custom homes.
    5.0
  • Home additions in Markham York Region, ON
    Canadian Constructor CreationsToronto and GTA design-build firm doing full-home renovations, basement conversions, bathrooms, kitchens and additions for homes and commercial clients.
    5.0
  • Home additions in Vaughan York Region, ON
    2x2 ConstructionVaughan construction company taking on home additions and general contracting work for houses in the Vaughan area.
    5.0
  • Home additions in Burlington Halton Region, ON
    Rock Cliff Custom HomesFamily-run builder of custom homes, cottages, renovations and heritage restorations in Oakville, Burlington, Mississauga and the Muskoka region.
    4.9
  • Home additions in Oakville Halton Region, ON
    Georgian Custom HomesToronto design-build firm doing custom homes, major renovations and additions across the GTA, with architecture and interior design in-house.
    5.0

Home additions: common questions

Do I need a permit for a home addition?

Yes. An addition changes the footprint or height of the house, so it needs a building permit and often a zoning review for setbacks and lot coverage. Plans are usually drawn by a designer or architect before the permit application goes in.

Can I add a second storey to my house?

Often, but the existing foundation and walls have to carry the new load. An engineer checks the structure before design starts, and the contractor builds to those drawings.

What happens before an addition is built?

A survey of the lot, a check of the zoning rules for setbacks, height and lot coverage, drawings by a designer or architect, an engineer's review where the structure is affected, and the building permit. Ask the firm which of these steps it handles and which it expects from your designer.

Can I live in my house while an addition is built?

Often. Most of the work happens outside the existing walls until the new space is joined to the house. Expect noise and dust, and a few days without power or water when the addition is tied in.

Before you get quotes

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