
Markham, Ontario
Renovation contractor in Markham
Kitchens, bathrooms, basements, legal basement apartments, additions and decks for Markham homes, planned properly, permitted where required and managed from first visit to final walk-through.
(647) 424-1511Ontario Renovation Company
Renovations made for the way Markham lives.
Markham mixes heritage streets in Unionville and Markham Village with large newer homes in Cornell, Berczy Village, Wismer and Cathedraltown, many with finished or unfinished basements.
We work across Markham from Unionville and Markham Village to Cornell and Milliken, in heritage homes and large newer family homes. The projects we are asked about most here are basement finishing and in-law suites, kitchen and bathroom upgrades and whole-home renovations.
Written scope
Every quote lists the work, the materials, the permits and the schedule before anything starts.
Permits sorted
We tell you what needs a permit, apply for it and book the inspections.
Trades in order
Demolition, rough-ins, inspections and finishes scheduled in the right sequence.
One point of contact
One person to call from the first visit to the final walk-through.
Kitchens, Baths & Interiors
Kitchens, bathrooms & interiors in Markham
Kitchen and bathroom remodels, accessible renovations, flooring, drywall and whole-home renovations, managed as one project.
Basements, Additions & Outdoor
Basements, additions & decks in Markham
Finished basements, legal basement apartments, home additions and decks: more living space without moving.
Permits & inspections
Permits in Markham
Building permits in Markham are issued by the City of Markham. Structural changes, additions, basement apartments, new bathrooms and most decks attached to the house need one, and electrical work needs an ESA permit. We tell you what applies before you sign, coordinate drawings, apply for the permit and book the inspections.
Ask About Your ProjectUsually needs a permit
Additions, structural and load-bearing wall changes, basement apartments, new bathrooms or moved drains, and decks attached to the house or more than about 600 mm off the ground.
Usually does not
Replacing cabinets, counters, flooring or fixtures in the same place, painting, and most cosmetic updates.
Electrical
Done by a licensed electrical contractor under an Electrical Safety Authority (ESA) permit.
Secondary suites
Must meet the Ontario Building Code and Fire Code, plus local zoning, parking and entrance rules.
Inspiration
Ideas for your renovation
Kitchens, showers, built-ins, laundry rooms and finished basements. Bring any photo you love to your consultation and we will talk through what it takes.
Open-concept main floor
Tiled walk-in shower
White kitchen with island
Main-floor laundry room
Custom built-ins
Finished basementAreas served
Where we work
Ontario Renovation Company works throughout Markham, including Unionville, Markham Village, Cornell, Berczy Village, Wismer, Cathedraltown, Milliken and Box Grove. We also serve nearby Richmond Hill, Scarborough, Vaughan, Stouffville, Aurora and Pickering and the rest of Scarborough & York Region.
(647) 424-1511info@ontariorenovationcompany.comMon–Sat 8am–6pm
Investment
What shapes the price of a renovation in Markham
Every house is different, so every project is quoted in writing after a visit. These are the factors that move the number.
Scope & size
How many rooms, how much square footage, and whether it is a refresh or a full gut.
Layout changes
Moving walls, plumbing or gas lines costs more than keeping the existing layout.
Structure
Load-bearing walls, beams, foundations and additions need engineering and permits.
Materials & finishes
Cabinets, counters, tile, flooring and fixtures range widely in price.
Condition of the house
Old wiring, plumbing, water damage or uneven floors found along the way.
Permits & drawings
Projects that need drawings, permits and inspections take more time and planning.
The process
Four steps, start to finish
01
Consultation
Tell us what you want to change and send a few photos. We visit, measure and talk through options.
02
Written Quote
A clear scope, materials, permits and schedule, in writing. No vague allowances.
03
Permits & Planning
Drawings, permits and material orders lined up before demolition starts.
04
Build & Walk-Through
Work done in the right order, inspected where required, and walked through with you at the end.
Services
Our Markham services
Kitchens, Baths & Interiors

Complimentary quote
Start your project.
Tell us about your renovation in four short steps. We will reply to book a visit, usually within one business day.
Share the details
Project, location, budget and timing.
Site visit & quote
Scope, materials, permits and schedule, in writing.
Enjoy the space
Built in the right order and walked through with you at the end.
Prefer to talk? (647) 424-1511
Questions
Frequently asked
Are you a general contractor in Markham?+
Yes. We manage renovations across Markham from start to finish: kitchens, bathrooms, basements, basement apartments, additions, flooring and decks, with licensed electrical and plumbing trades scheduled as part of the project and one point of contact throughout.
Who issues building permits in Markham?+
Building permits for Markham are issued by the City of Markham. We tell you which parts of your project need a permit, coordinate drawings, apply on your behalf and book the inspections.
Can I build a legal basement apartment in Markham?+
In many cases, yes. Ontario allows additional residential units in many houses, and the City of Markham sets the local zoning, parking and entrance rules. Every suite needs a building permit and must meet the Building Code and Fire Code. We check what your property allows before you commit.
How much does a renovation cost in Markham?+
It depends on the scope, the size of the space, the materials and whether walls, plumbing or electrical are moving. Tell us about the project and send a few photos and we will visit and send a free written quote.
Which parts of Markham do you serve?+
All of Markham, including Unionville, Markham Village, Cornell, Berczy Village, Wismer, Cathedraltown, Milliken and Box Grove, as well as nearby Richmond Hill, Scarborough, Vaughan and Stouffville.
What renovations are most common in Markham?+
With heritage homes and large newer family homes, the projects we are asked about most in Markham are basement finishing and in-law suites, kitchen and bathroom upgrades and whole-home renovations.
How do I get a quote in Markham?+
Use the form on this page or call (647) 424-1511. Tell us the type of project, your timing and a rough budget; photos help. We will book a visit and send a written quote listing the scope, materials, permits and schedule.
Home Renovations in Markham: Kitchens, Bathrooms, Basements and More
Century and heritage homes in Markham
Markham's older homes, many built before the Second World War, have character worth keeping and systems that usually are not: knob-and-tube or early wiring, plaster and lath walls, stone or block foundations, and framing that is rarely square. We open these houses carefully, test for asbestos and lead paint before demolition, and plan for what is behind the walls instead of pretending it will not be there.
1970s to 1990s family homes in Markham
Homes built in Markham from the 1970s to the 1990s are reaching their first full renovation: original oak kitchens, tub-and-tile bathrooms, sunken living rooms and windows at the end of their life. Some of these houses also have materials worth checking before work starts, such as aluminum branch wiring from the late 1960s and 1970s or poly-B plumbing installed from the late 1970s to the late 1990s.
Newer homes built since 2000 in Markham
Newer Markham homes have good bones and builder-grade finishes. The most common projects are finishing the basement, often with a bathroom roughed in by the builder, and upgrading kitchens and ensuites. Engineered floor joists cannot be cut or notched without an engineer's approval, and in the first years of ownership it is worth checking how a change affects your Tarion new-home warranty.
Kitchen Renovations in Markham
Kitchens in Markham come in every shape, from the closed-off galley kitchens in older houses to builder-grade kitchens in newer homes that never quite worked. With heritage homes and large newer family homes across Unionville, Markham Village and Cornell, there is no single template, so every kitchen remodel we plan here starts with the room in front of us.
Our Markham kitchen projects follow a clear sequence: measure and plan, order long-lead items like cabinets, then demolition, rough-ins and inspections, followed by drywall, cabinets, counters, tile and finishing. You get one point of contact from start to finish.
Bathroom Renovations in Markham
Many bathrooms in Markham are original to the house, and in heritage homes and large newer family homes that can mean anything from a tired 1970s three-piece to a builder-grade ensuite with a tub nobody uses. A bathroom remodel is one of the best-value updates in the home, as long as the work behind the tile is done properly.
Our Markham bathroom remodels are fully managed: demolition, repairs, plumbing, electrical, waterproofing, tile, glass, fixtures and finishing, with a written schedule so you know how long the room is out of use.
Basement Finishing in Markham
In Markham, a finished basement is one of the most requested projects we quote, especially in heritage homes and large newer family homes. Families in Unionville, Markham Village and Cornell use that space for a rec room, an office, a gym or a guest suite instead of moving to get more room.
We finish Markham basements from bare concrete to move-in ready: insulation, framing, bathrooms, wet bars, laundry, pot lights, drywall, flooring and trim, with the permit and inspections handled.
Legal Basement Apartments in Markham
In Markham, homeowners are adding legal secondary suites to help with the mortgage and to keep family close. The key is building one properly, with a permit, so the unit is safe, insurable and adds value when you sell.
Before we quote a Markham basement apartment, we confirm the City of Markham's requirements for your property. Then we plan fire separation, egress windows, the entrance, alarms, the suite kitchen and bathroom, and the permit, so the unit is legal from day one.
Home Additions in Markham
Markham homeowners add space with rear and side additions, second storeys over bungalows and four-season sunrooms, especially where heritage homes and large newer family homes sit on lots with room to grow.
Accessible Renovations in Markham
In Markham, where homes include heritage homes and large newer family homes, accessibility upgrades range from a single curbless shower to moving a bedroom and laundry to the main floor so the stairs become optional.
Renovating in Scarborough & York Region
Across Scarborough and York Region, families are adding space without moving: finishing basements, adding in-law and rental suites, opening up main floors and updating kitchens and bathrooms in homes built from the 1960s to the 2010s.


















