Newmarket · Residential & Commercial
Renovation Contractor in Newmarket
Kitchens, bathrooms, basements, whole-home renovations and commercial build-outs across Newmarket — from historic Main Street to Stonehaven and Summerhill. One family-owned team handles the design, the permits and every trade.
- 5.0★on Google
- Best of 2024HomeStars
- Since 2015Family-owned
- LicensedInsured & WSIB-covered
Your Newmarket contractor
Your Newmarket Renovation Team
We're based just down Yonge Street in Richmond Hill — close enough for regular site visits and quick answers. We manage the design, Town of Newmarket permits and every trade, so you deal with one accountable team.
- Permits handled — building, tree and heritage permits with the Town of Newmarket
- A clear quote — before any work starts — no surprise costs
- Licensed trades — plumbing, gas and electrical done to code
- Close by — based just down Yonge Street in Richmond Hill
- Written 2-year workmanship warranty
What clients say
"J Group was phenomenal to work with from start to finish. AJ supported us through the entire process and each and every trade he brought in was equally great. Trustworthy, honest, diligent and quality workmanship."Melissa O.Home renovation · Google review
What we do
Renovation Services in Newmarket
One room or the whole house — residential and commercial, renovation and new construction.
Kitchen renovations
New layouts, custom cabinetry, islands and lighting for family kitchens.
Bathroom renovations
Ensuites, walk-in showers, tile and vanities — waterproofed properly.
Whole-home & basements
Open main floors, finished basements, basement apartments and additions.
Commercial renovations
Offices, clinics and retail along Yonge Street, Davis Drive and Main Street.
Decks, fences & yards
Cedar fences, decks, patios and retaining walls built to last.
Local know-how
Renovating a Newmarket Home: What to Expect
Newmarket grew from a 19th-century mill town on the Holland River into one of York Region's busiest towns. Its homes range from Victorian main-street houses to '80s subdivisions and new builds.
Historic Main Street
Lower Main Street South is a heritage conservation district, and many nearby homes date from the late 1800s and early 1900s. Exterior changes there need a heritage permit, and a pre-consultation with the Town's advisory group comes first.
1960s–'80s neighbourhoods
Areas like Gorham-College Manor, Bristol-London and Huron Heights have bungalows, backsplits and two-storeys from the 1960s to the '80s — ideal for open main floors, new kitchens and basement suites.
Newer subdivisions
Stonehaven, Summerhill, Woodland Hill and Glenway were built from the late '80s on. Builder-grade kitchens and bathrooms and unfinished basements are ready for an upgrade.
Additions & custom homes
Larger lots in older parts of town suit additions and custom rebuilds. Newmarket requires a permit for any private tree 20 cm or more across, so we plan around mature trees from the start.
Permits & City rules
Newmarket Rules We Handle for You
- Building permits — needed for structural changes, new or moved plumbing, finished basements, basement apartments and decks more than 60 cm (24 in) off the ground. We prepare the drawings, apply and book every inspection.
- Protected trees — Newmarket's Private Tree Protection By-law requires a permit to injure or remove a private tree 20 cm or more in diameter. Removing one without a permit can bring fines and compensation.
- Heritage district — Lower Main Street South is a heritage conservation district. Exterior changes, new storefronts and new structures there need a heritage permit.
- Construction hours — we follow the Town of Newmarket's noise by-law and schedule loud work inside the permitted hours.
- More homes on your lot — Ontario now allows up to three units on most serviced residential lots — for example, a basement apartment plus a garden suite. We check your lot's zoning at the consultation.
How it starts
In-Person Consultation
$199
Credited in full toward your project. We walk your home, talk through budget and timing honestly, and give you a measured floor plan report.
Where we work
Newmarket Neighbourhoods We Serve
We renovate homes and commercial spaces in every part of town.
Main Street & Old Town
Lower Main Street South, Old Town Newmarket, Fairy Lake
Stonehaven & Woodland Hill
Stonehaven, Woodland Hill, Copper Hills
Summerhill & Glenway
Summerhill Estates, Glenway, Bristol-London
Central
Gorham-College Manor, Huron Heights, Leslie Valley
South Newmarket
Armitage and the Yonge Street corridor
Commercial
Offices, clinics and retail along Yonge Street, Davis Drive and Main Street
Nearby? We also serve Aurora, Richmond Hill, King, Keswick and the rest of the GTA. See all areas we serve →
Transparent pricing
What a Renovation Costs in Newmarket
Every home is different, but here's where most of our projects land before HST.
Kitchen renovations
From $30K
Most mid-size kitchens land between $45K and $95K, with appliances extra. Keeping your existing layout keeps costs down.
Bathroom renovations
From $22K
For a full bathroom. Powder rooms start around $8K and primary ensuites around $35K. Moving the toilet, tub or shower drain adds the most.
What moves the price in Newmarket
- Layout changes — moving walls, plumbing or gas lines costs more than updating what's there.
- Permits and approvals — building, tree and heritage permits add drawings, fees and time.
- The age of your home — older wiring, plumbing and framing may need updating once the walls are open.
- Finishes — custom cabinetry, natural stone and large-format tile cost more than stock options.
Reviews
York Region Homeowners Trust J Group
"Thanks to J Group's exceptional work, the renovations on my house in Thornhill exceeded my expectations… I wholeheartedly recommend J Group Renovations to anyone looking for a contractor who will go above and beyond."Danial Z.Thornhill · Home renovation
"I had the privilege of working with contractors J Group to renovate my house in Vaughan, and I must say that my experience was nothing short of exceptional. AJ's professionalism and attention to detail is unmatched."Ali B.Vaughan · Home renovation
"I haven't had many great experiences with contractors in the past, and I have bought and flipped 11 homes in the GTA. J Group is by far the most professional, transparent and accountable team I have ever worked with."Marc A.Has bought & flipped 11 GTA homes
How it works
How a Newmarket Renovation Works With Us
Consultation
$199 in-person visit, credited in full toward your project. We walk the space, talk through budget and timing honestly, and give you a measured floor plan report.
Design & quote
Layout, materials and finishes — then a clear quote and a realistic schedule before any work starts.
Permits & approvals
Building, tree and heritage permits with the Town of Newmarket, plus condo approvals when needed.
Build
One project manager, licensed trades, protected floors and daily clean-up — with regular updates as we go.
Walkthrough & warranty
We don't call it done until you do — backed by our written 2-year workmanship warranty.
Questions
Newmarket Renovation FAQ
Do you work across all of Newmarket?
Yes — Main Street and Old Town, Stonehaven, Woodland Hill, Summerhill, Glenway, Bristol-London, Huron Heights and Armitage, plus the rest of York Region and the GTA.
Do I need a permit to remove a tree in Newmarket?
If it's 20 cm or more in diameter, yes. Newmarket's Private Tree Protection By-law requires a permit to injure or remove a private tree that size, so we flag protected trees at the consultation.
Can I renovate a home on Lower Main Street South?
Yes. Exterior changes and new structures in the heritage district need a heritage permit, and the Town asks for a pre-consultation with its advisory group first. We plan the design around it from the start.
Do I need a permit to finish my basement?
In most cases, yes. Finishing a basement with new walls, plumbing or a bedroom needs a building permit and inspections, and a basement apartment also has to meet zoning rules. We prepare the drawings and handle the permit.
Can I add a basement apartment or second unit?
Often, yes. Ontario allows up to three units on most serviced residential lots, and Newmarket's zoning sets the rules for size, entrances and parking. We check your property at the consultation.
Do you take on commercial renovations in Newmarket?
Yes — offices, clinics and retail units, including full build-outs and leasehold improvements. We schedule around your business hours. See commercial renovations →
How much does a renovation cost in Newmarket?
Kitchens start from about $30,000 and full bathrooms from about $22,000, before HST, with appliances extra. Layout changes, permits and finishes affect the price. You get a clear quote after your consultation. Try our cost estimator →
What does the $199 consultation include?
An in-person visit, an honest conversation about budget and feasibility, and a measured floor plan report of your space. The $199 is credited in full toward your project.
Request Your Newmarket Renovation Consultation
Tell us about your home or space. $199, credited in full toward your project. We respond within one business day.
Close to Richmond Hill? See all the areas we serve, or our Toronto renovation services.