General contractors

The 10 Best General Contractors in Markham, ON

Updated 132 firms checked10 ranked

This list ranks 10 general contractors in Markham, ON. It starts from Google Maps searches for general contractors and related building work in Markham: 132 firms were checked, and building and renovation firms with their own website and an open Google listing went forward. Firms are weighed on their Google rating, the number of reviews behind it, how closely their services match general contracting, and their portfolio. The strongest firm overall sits at place 1, places 2 to 4 carry a badge for what each suits best, and places 5 to 10 run in order. Ratings and review counts are Google's, checked October 14, 2026. How we rank

Number 1: Y2 Design & Build

Best overall

Markham design-build contractor renovating kitchens, bathrooms, basements, condos and full homes and building additions and garden suites across the GTA.

Updated

Why it ranks here

  • Has over 14 years of industry experience and 500-plus completed renovations in the GTA.
  • Signs fixed-sum contracts with an itemized scope, and assigns a project manager to every job.
  • Builds second-storey additions, rear extensions and garden suites, with design and construction under one contract.
  • Also builds laneway homes and basement apartments as rental or family units.
  • Takes on condo remodels, handling board approvals, elevator bookings and building rules.
  • Serves Toronto plus York, Peel, Halton and Durham regions.

Number 2: MB Home Reno

Best for full-home renovations

Renovation contractor serving Vaughan, Markham and Richmond Hill with full-home, basement, bathroom and kitchen renovations plus commercial work.

Updated

Why it ranks here

  • Has been building and remodelling homes and commercial spaces for over 20 years.
  • Works across Markham, Vaughan, Richmond Hill, Aurora, Newmarket, North York, Toronto and Mississauga.
  • Bathroom jobs take in tiling, vanities, showers and new fixtures.
  • Also renovates offices, retail units and plazas for commercial clients.
  • Every project opens with a detailed consultation covering the client's ideas and preferences.

Number 3: ForHome Renovation

Best for kitchen and basement remodels

GTA renovation company doing kitchens, bathrooms, basements, flooring and staircases with in-house crews and a materials showroom.

Updated

Why it ranks here

  • Uses its own in-house craftsmen on jobs rather than subcontractors.
  • Gives a two-year warranty once a project is finished.
  • Runs a showroom where clients can look at materials and talk through plans in person.
  • Offers design and modelling services to help clients visualize a planned renovation.
  • Its portfolio includes a basement theatre in Thornhill, rental basement work in Richmond Hill and kitchens in Markham and King City.
  • Has consultants and project managers on staff to run its renovations.

Number 4: East Home Renovation

Best for design-build renovation packages

GTA interior renovation company, founded in 2015, doing kitchens, bathrooms, basements, full-house and commercial renovations, with design included.

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Why it ranks here

  • Set up in 2015 and has since renovated nearly 200 homes around the GTA.
  • Backs its home renovations with a 3-year warranty.
  • Has plumbing, electrical and HVAC specialists among its technicians.
  • Bundles design and construction into one package and sends real-time progress updates.
  • Sources finishing materials straight from manufacturers in China for commercial clients and handles shipping and customs.

Number 5: Canadian Constructor Creations

Toronto and GTA design-build firm doing full-home renovations, basement conversions, bathrooms, kitchens and additions for homes and commercial clients.

Updated
  • Has over 20 years of industry experience, spanning low-rise and high-rise construction.
  • Offers a 5-year warranty, as stated on its homepage.
  • Works as a design-build and renovation company on houses and commercial projects across Toronto and the GTA.
  • Prepares complete architectural plans and drawings, with construction engineers and architectural engineers among its staff.
  • Builds houses, carries out complete house renovations and converts basements into residential units.
  • Portfolio work includes full home renovations in Newmarket, Scarborough and on Bloor Street in downtown Toronto.

Number 6: Summit Contractors

Richmond Hill renovation company doing bathrooms, kitchens, basements and full-house renovations across Toronto and York Region.

Updated
  • Won the HomeStars Best of award six times, for each year from 2018 to 2023.
  • Has run as a Richmond Hill renovation company since 2005.
  • Counts 700-plus completed projects and a team of 20.
  • Has master electricians, plumbers and HVAC technicians on its in-house team.
  • Takes jobs through five stages, from a discovery consultation and design planning to construction and a final walk-through.
  • Works under written contracts and covers framing, insulation, drywall and painting within its full-service renovations.

Ranks 07 to 10

Number 7: Renoca Design

Rated 5.0 out of 5 from 54 Google reviews 647-781-7510CallWebsiteof Renoca Design (opens in a new tab)

Number 8: A & J Renovation

Rated 4.9 out of 5 from 98 Google reviews 647-331-8881CallWebsiteof A & J Renovation (opens in a new tab)

Number 9: Span-Co General Contracting

Number 10: P&O General Construction

Compare the firms

RankFirmBest forServicesGoogle ratingArea
01Y2 Design & BuildAdditions and garden suites under one contractHome renovations · Home extensions · Garden suites · Kitchen renovations · Condo renovationsRated 5.0 out of 5 from 115 Google reviewsMarkham
02MB Home RenoFull-home renovationsFull home renovations · Basement renovations · Bathroom renovations · Kitchen renovations · Commercial renovationsRated 5.0 out of 5 from 109 Google reviewsRichmond Hill, serves Markham
03ForHome RenovationKitchen and basement remodelsKitchen renovations · Bathroom renovations · Basement renovations · Custom cabinetry · Flooring and staircasesRated 5.0 out of 5 from 92 Google reviewsRichmond Hill, serves Markham
04East Home RenovationDesign-build renovation packagesFull house renovations · Kitchen renovations · Bathroom renovations · Basement renovations · Commercial renovationsRated 5.0 out of 5 from 81 Google reviewsMarkham
05Canadian Constructor CreationsFull-home renovations that need plans drawnHome additions · Full home renovations · Basement conversions · Bathroom renovations · Design-buildRated 5.0 out of 5 from 66 Google reviewsMarkham
06Summit ContractorsAward-winning bathroom and kitchen remodelsBathroom renovations · Kitchen renovations · Basement renovations · Full house renovationsRated 5.0 out of 5 from 76 Google reviewsBased in Richmond Hill
07Renoca DesignFull-house remodels and basement rental unitsFull house renovations · Basement renovations · Bathroom renovations · Kitchen renovations · FlooringRated 5.0 out of 5 from 54 Google reviewsMarkham
08A & J RenovationOwner-led basement and bathroom workBasement renovations · Bathroom renovationsRated 4.9 out of 5 from 98 Google reviewsScarborough, serves Markham
09Span-Co General ContractingCondo and bathroom renovations in TorontoKitchen renovations · Bathroom renovations · Condo renovations · Full home renovations · Building maintenanceRated 5.0 out of 5 from 52 Google reviewsMarkham
10P&O General ConstructionAdditions and full renovations with on-site managersHome additions · Full house renovations · Stairs renovations · Wall removal · Kitchen renovationsRated 4.9 out of 5 from 101 Google reviewsMarkham

What to check before hiring a general contractor in Markham

Five things to confirm with any firm, on this list or not, before you sign. The rules below are Ontario's and Markham's.

  1. Registration with the WSIB

    Ask the firm for a clearance certificate from the WSIB, which confirms it is registered for workers' compensation and its account is in good standing. The certificate confirms the firm is registered with the WSIB and up to date on its premiums, so check its dates cover your job.

  2. Liability insurance

    Ask for a certificate of insurance that names the firm and shows commercial general liability coverage in force for the dates of your job, and check that the subcontractors it brings in are covered too.

  3. The building permit from Markham

    Building permits for homes in Markham come from the City of Markham, and structural work, additions, new plumbing and electrical work and basement finishing usually need one. Agree in writing who applies for the permit and books the inspections.

  4. A written contract

    Get the scope of work, the payment schedule tied to stages of the work, start and finish dates, how changes are agreed and priced, and who handles permits and cleanup, all in one signed contract before any work starts.

  5. The warranty

    For a new house: a new house in Ontario must be built by a builder licensed by the Home Construction Regulatory Authority (HCRA) and comes with Tarion's warranty: one year on workmanship and materials, two years on items such as water penetration and the electrical, plumbing and heating systems, and seven years on major structural defects. For renovation work, get the firm's own workmanship warranty in writing.

Types of general contractor in Markham

The 10 firms on this list fall into 3 groups, read from what each firm's own site says it does and how it is listed on Google.

Design-build firms2

Design-build firms design the project and build it under one contract, so one firm answers for the drawings and the work.

General contractors2

General contractors run building projects of many kinds and bring in the trades each job needs.

General contractors in Markham: common questions

What does a general contractor do on a home project?

A general contractor runs the job from start to finish: pricing it, booking and supervising the trades, ordering materials, arranging inspections and keeping the schedule. You deal with one firm instead of hiring the framer, plumber, electrician and drywaller yourself.

Do I need a building permit for a renovation?

Usually, for anything structural, for new plumbing or electrical work, and for most basement finishing, additions and decks. Your municipality sets the rules and issues the permit. Many general contractors apply for it as part of the job, so agree who is responsible before you sign.

What should a renovation contract include?

A written scope of work, the price and how changes will be priced, a payment schedule tied to stages of the work, start and finish dates, who pulls the permits, and the warranty on workmanship. Pay as stages are completed rather than most of the price up front.

Should I hire a general contractor or manage the trades myself?

Managing the trades yourself means booking, ordering and supervising each one, arranging the inspections and absorbing the delay when one trade holds up the next. A general contractor does that work and answers for the result. Running it yourself suits small jobs that need one or two trades.

How do I check that a contractor in Markham is registered with WSIB?

Ask the firm for a clearance certificate from the WSIB. The certificate confirms the firm is registered with the WSIB and up to date on its premiums, so check its dates cover your job.

Who issues building permits in Markham?

Building permits for homes in Markham come from the City of Markham. For general contracting, structural work, additions, new plumbing and electrical work and basement finishing usually need one. Many firms apply for the permit as part of the job, so agree who does it before you sign.

Corrections

Has something on this list changed?

Send the detail that is out of date, or the name and website of a firm that belongs here.