The 10 Best Renovation Contractors in Markham, ON

Updated Oct 2026132 firms checked10 ranked

This list ranks 10 renovation contractors in Markham, ON. It starts from Google Maps searches for renovation 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 home renovation, 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

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.

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.

Why it ranks here

Rated 5.0 from 78 Google reviews, level with the top rating on this list
Based in Whitchurch-Stouffville, outside Markham
Its services include bathroom renovations and home renovations

Why it ranks here

Rated 4.9 from 117 Google reviews
Its 4 services include kitchen renovations, bathroom renovations, general contracting and home renovations

Converts basements into living space, home theatres or rental units.
Full-house jobs can take in flooring, lighting, insulation and room additions as well as kitchens and baths.
Works in three steps, starting with a consultation where the team takes measurements and draws up a plan.

Established in 2011 and run as an owner-operated bathroom renovation company.
Now has an in-house designer, bringing design and construction under one roof.
Takes on compact condo bathrooms and challenging layouts that need structural planning.
Services include tub-to-shower conversions and accessible bathrooms planned around safety and ease of use.

Ranks 07 to 10

Number 7: CKG - Design & Build

Markham design-build firm offering general contracting and construction management on houses and commercial buildings.

4.9 905-471-3500Call Website

Number 8: Mister Bathroom

GTA bathroom renovation company whose most requested service is an all-inclusive 3-piece bathroom, with a by-appointment Markham showroom.

4.9 647-720-2284Call Website

Number 9: Insame Design & Build

GTA design-build general contractor doing full-home renovations, modern custom homes, basements, kitchens, bathrooms and commercial construction.

5.0 647-949-5892Call Website

Number 10: David Reno

Toronto and GTA renovation contractor doing basements, kitchens, bathrooms, open-concept layouts, flooring and stairs, plus pools and landscaping.

4.9 647-463-2246Call Website

Compare the firms

Rank	Firm	Best for	Services	Google rating	Area
01	MB Home Reno	Residential and commercial renovation work	Full home renovations · Basement renovations · Bathroom renovations · Kitchen renovations · Commercial renovations	Rated 5.0 out of 5 from 109 Google reviews	Richmond Hill, serves Markham
02	East Home Renovation	Interiors with design included	Full house renovations · Kitchen renovations · Bathroom renovations · Basement renovations · Commercial renovations	Rated 5.0 out of 5 from 81 Google reviews	Markham
03	Stronor Bathworks	Bathroom renovations	Bathroom renovations · Home renovations	Rated 5.0 out of 5 from 78 Google reviews	Whitchurch-Stouffville, serves Markham
04	Senso Design	Kitchen renovations	Kitchen renovations · Bathroom renovations · General contracting · Home renovations	Rated 4.9 out of 5 from 117 Google reviews	Markham
05	Renoca Design	Full-house remodels and basement rental units	Full house renovations · Basement renovations · Bathroom renovations · Kitchen renovations · Flooring	Rated 5.0 out of 5 from 54 Google reviews	Markham
06	Happy Bathroom Renovation	Condo bathrooms with tight layouts	Bathroom renovations · Condo bathrooms · Tub-to-shower conversions · Accessible bathrooms · Bathroom design	Rated 4.9 out of 5 from 132 Google reviews	Markham
07	CKG - Design & Build	Residential design-build projects in Markham	Residential construction · Design-build · General contracting · Construction management	Rated 4.9 out of 5 from 129 Google reviews	Markham
08	Mister Bathroom	3-piece bathroom refits done in a week	Bathroom renovations · 3-piece bathrooms · Ensuite renovations · Tile work · Installation only	Rated 4.9 out of 5 from 120 Google reviews	Markham
09	Insame Design & Build	Full-home renovations by one design-build team	Full home renovations · Custom homes · Basement renovations · Kitchen renovations · Commercial construction	Rated 5.0 out of 5 from 40 Google reviews	Markham
10	David Reno	Open-concept layouts, flooring and stairs	Home renovations · Basement renovations · Open-concept renovations · Flooring and stairs · Home additions	Rated 4.9 out of 5 from 47 Google reviews	Markham

What to check before hiring a renovation 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.

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.
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.
The building permit from Markham
Building permits for homes in Markham come from the City of Markham, and removing walls, moving plumbing and adding circuits usually need one. Agree in writing who applies for the permit and books the inspections.
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.
The warranty
A renovation is not a new home, so the new home warranty rules usually do not apply: get the firm's own workmanship warranty in writing, with what it covers and for how long. Renovators in RenoMark, the Canadian Home Builders' Association program, offer a minimum two-year warranty on their work.

Types of renovation contractor in Markham

The 10 firms on this list fall into 2 groups, read from what each firm's own site says it does and how it is listed on Google.

Renovation companies8

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

Number 1: MB Home Reno
Number 2: East Home Renovation
Number 3: Stronor Bathworks
Number 4: Senso Design
Number 5: Renoca Design
Number 6: Happy Bathroom Renovation
Number 8: Mister Bathroom
Number 10: David Reno

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.

Number 7: CKG - Design & Build
Number 9: Insame Design & Build

Renovation contractors in Markham: common questions

What is the difference between a renovation contractor and a general contractor?

The two overlap. A renovation contractor works on existing homes, while a general contractor may also take on new builds and additions. Many firms do both, so judge them on the projects they show rather than the label.

What is RenoMark?

RenoMark is the renovator program of the Canadian Home Builders' Association. Members agree to a code of conduct that covers written contracts, a warranty on their work and liability insurance.

How do I compare renovation quotes?

Ask each firm to price the same written scope, split into labour, materials and allowances for items you have not chosen yet. A low quote often has small allowances that grow once the work starts.

Can I stay in my home during a renovation?

Often, when the work covers one or two rooms. Full-home renovations, work that shuts off water or power for days, and jobs that disturb older materials such as asbestos in plaster or flooring can make it hard to stay. Ask the firm how it will stage the work and keep a kitchen or bathroom usable.

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 home renovation, removing walls, moving plumbing and adding circuits usually need one. 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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The 10 Best Renovation Contractors in Markham, ON

Number 1: MB Home Reno

Number 2: East Home Renovation

Number 3: Stronor Bathworks

Number 4: Senso Design

Number 5: Renoca Design

Number 6: Happy Bathroom Renovation

Ranks 07 to 10

Number 7: CKG - Design & Build

Number 8: Mister Bathroom

Number 9: Insame Design & Build

Number 10: David Reno

Compare the firms

What to check before hiring a renovation contractor in Markham

Registration with the WSIB

Liability insurance

The building permit from Markham

A written contract

The warranty

Types of renovation contractor in Markham

Renovation companies8

Design-build firms2

Renovation contractors in Markham: common questions

Before you get quotes

Compare Contractor Quotes: What to Check, Line by Line

Home Renovation Cost in Canada: Prices per Square Foot

Renovating a House: The Order of Work, Step by Step

Has something on this list changed?