Custom home builders

The 10 Best Custom Home Builders in Markham, ON

Updated 132 firms checked10 ranked

This list ranks 10 custom home builders in Markham, ON. It starts from Google Maps searches for custom home builders 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 custom home building, 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

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.
Home renovations · Home extensions · Garden suites · Kitchen renovations · Condo renovations Markham
Visit website Call 647-503-2374
5.0 from 115 Google reviews

C&S Construction

Best for design-build new homes

Thornhill general contractor doing new home builds, additions and house renovations, plus restaurant, shop and office fit-outs across the GTA.

Updated

Why it ranks here

  • Gives 2007 as the year the company was established.
  • Its work spans new home builds, additions, construction management, and commercial and residential renovations.
  • Fits out restaurants, commercial kitchens, shops and offices, including tenant improvements and landlord coordination.
  • Its design-build service coordinates architects and engineers from first design through to construction.
  • An engineer reviews each design for feasibility, and detailed engineering drawings are prepared before construction starts.
  • Has its head office on Glen Cameron Road in Thornhill.
New home builds · Home additions · Commercial fit-outs · Kitchen renovations · Design-build Based in Thornhill
Visit website Call 647-988-6615
5.0 from 41 Google reviews

Homewrap Construction

Best for engineer-led custom homes

Engineer-led Toronto design-build firm building custom homes, additions and garden suites and doing full-home renovations across the GTA.

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Why it ranks here

  • Started out with engineering degrees and commercial construction experience before moving into residential building.
  • Has 10-plus years of building work across the GTA.
  • Keeps design and project management in-house, with one project lead on every build.
  • Adds space through second-storey builds, side extensions and rear additions.
  • Takes garden suites and laneway homes from feasibility and design through to a finished unit.
  • Portfolio includes a custom new build in the Bridle Path and full home renovations in York Mills and Newmarket.
Custom homes · Home additions · Garden suites · Full home renovations · Hardscaping Markham
Visit website Call 416-749-0999
5.0 from 26 Google reviews

Bloomfield Homes

Best for homes with interior design included

GTA boutique developer building custom homes and residential and commercial developments, and renovating existing homes across Ontario.

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Why it ranks here

  • Has over 15 years of experience in custom homes, developments and renovations.
  • Works as a boutique developer across the Greater Toronto Area and the rest of Ontario.
  • Also designs and builds residential and commercial developments in Ontario.
  • Its custom home process runs from a first consultation to architectural and interior design, then construction.
Custom homes · Residential developments · Commercial developments · Home renovations Based in Richmond Hill
Visit website Call 647-761-4637
4.8 from 34 Google reviews

Ranks 07 to 10

Arcadia Homes

Family-owned GTA custom home builder also doing residential and commercial construction management, land development and real estate services.

5.0 647-527-1233CallWebsite

Dupont Custom Homes

Custom home builder

4.9 416-209-0029CallWebsite

Sanza Homes

General contractor

5.0 888-407-2692CallWebsite

Merrett Homes

Home builder

4.8 416-419-5896CallWebsite

Compare the firms

FirmBest forServicesGoogle ratingArea
01Y2 Design & BuildAdditions and garden suites under one contractHome renovations · Home extensions · Garden suites · Kitchen renovations · Condo renovations5.0Markham
02C&S ConstructionDesign-build new homesNew home builds · Home additions · Commercial fit-outs · Kitchen renovations · Design-build5.0Based in Thornhill
03Homewrap ConstructionEngineer-led custom homesCustom homes · Home additions · Garden suites · Full home renovations · Hardscaping5.0Markham
04Bloomfield HomesHomes with interior design includedCustom homes · Residential developments · Commercial developments · Home renovations4.8Based in Richmond Hill
05Home Town ConstructionHome building and kitchen or bath remodelsHome building · Kitchen renovations · Bathroom renovations · Home improvement4.8Markham
06The Renovators of CanadaCustom homes plus decks and flooringCustom homes · Kitchen renovations · Bathroom renovations · Flooring · Decks4.7Markham
07Arcadia HomesCustom homes built from the ground upCustom homes · Construction management · Land development · Low-rise developments · Real estate services5.0Based in Scarborough

What to check before hiring a custom home builder 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 a new house needs one before construction starts. 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 new home warranty

    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.

Types of custom home builder in Markham

The 10 firms on this list fall into 4 groups, read from what each firm's own site says it does and how it is listed on Google.

Home builders4

Home builders build new houses as their main work, and some take on additions and major renovations too.

Design-build firms3

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.

Renovation companies1

Renovation companies renovate existing homes, one room at a time or all of it at once.

Custom home builders in Markham: common questions

What is the difference between a custom home builder and a production builder?

A custom builder builds one home to your plans, on your lot or a lot you choose together. A production builder sells homes from a set range of plans in its own developments, with a fixed list of options and upgrades.

Does a new home come with a warranty?

In British Columbia, Alberta and Ontario, new homes must carry third-party home warranty coverage, and the builder registers each home before construction starts. Ask the builder which warranty provider covers its homes and what the coverage includes.

Should the builder or an architect design the house?

Either can work. Many custom builders offer design and build under one contract, with a designer or architect on their team. Others build to plans you bring from an independent architect. Ask to see finished homes built from both routes.

What should I ask a custom home builder before signing?

Ask to walk through homes it has finished and to speak with past clients, which warranty provider covers its homes, who will design the house, how changes are handled once building starts, and who applies for the permit and books the inspections.

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 custom home building, a new house needs one before construction starts. Many firms apply for the permit as part of the job, so agree who does it before you sign.

Before you get quotes

Corrections

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