ArborProof

Fact-checking tree companies.

Newmarket, Ontario · Updated September 2026

Best Tree Services in Newmarket

The three highest-scoring tree companies that serve Newmarket, ranked by LEAF Score. Every company in Ontario is checked the same way, on insurance coverage, arborist credentials, experience and reviews. No company can pay to be at the top of this page.

19companies serve Newmarket
10with WSIB clearance confirmed
3.1average leaves here

Newmarket’s top 3 by LEAF Score

1

Northshore Tree Experts Inc.

Serves Newmarket, Wasaga Beach, Oro-Medonte, Bradford and Georgina and more

5.0 · 188 Google reviewsWSIB clearance not confirmed
Not yet verified by the businessThese details come from our own research. Is this your business? Claim this listing

Specializations

Tree removal (small)Tree removal (large)Tree pruning (small)Tree pruning (large)Hedge trimming (medium and large)Stump grinding (small)Stump grinding (large)Tree planting (small)Tree planting (large)Cabling & bracingFertilizationHydro line clearance24/7 emergency serviceCrane servicesOn-site consultationLegal / bylaw dispute assistanceArborist reportsTree protection plansTree risk assessmentTree appraisalAir excavationPest & disease treatmentLand clearingEducation and advocacyWood chips - UNrefined - LARGE quantityWood chips - Refined - LARGE quantity
Inferred from our research — not yet confirmed by the businessNot inferred — ask directly
Visit websiteFull profile →
4/10LEAF Score

Score breakdown

50+ Google reviews188 Google reviews
5+ years in business8 years in business
Employs a Certified Arborist3 ISA Certified Arborists
Johnny Corner, Certified Arborist See certificate →
Martin Overgaauw, Certified Arborist See certificate →
Steven Henderson, Certified Arborist See certificate →
Employs a Tree Risk Assessment Qualification holderNone confirmed
Employs a Board Certified Master ArboristNone confirmed
Certificate of insurance on fileNot posted
Valid WSIB clearanceNo WSIB account found under this business name
Transparent pricingNot posted
Verified their own listingNot yet confirmed
Founded in CanadaFounded in Canada
2

Ash Urban Forestry

Serves Newmarket, Keswick, Georgina, Aurora and East Gwillimbury and more

5.0 · 20 Google reviewsWSIB clearance confirmed · to Nov 19, 2026
Not yet verified by the businessThese details come from our own research. Is this your business? Claim this listing

Specializations

Tree removal (small)Tree removal (large)Tree pruning (small)Tree pruning (large)Hedge trimming (medium and large)Stump grinding (small)Stump grinding (large)Tree planting (small)Tree planting (large)Cabling & bracingFertilizationHydro line clearance24/7 emergency serviceCrane servicesOn-site consultationLegal / bylaw dispute assistanceArborist reportsTree protection plansTree risk assessmentTree appraisalAir excavationPest & disease treatmentLand clearingEducation and advocacyWood chips - UNrefined - LARGE quantityWood chips - Refined - LARGE quantity
Inferred from our research — not yet confirmed by the businessNot inferred — ask directly
Visit websiteFull profile →
4/10LEAF Score

Score breakdown

50+ Google reviews20 Google reviews
5+ years in business2 years in business
Employs a Certified Arborist1 ISA Certified Arborist
Trevor Ash, Certified Arborist See certificate →
Employs a Tree Risk Assessment Qualification holder1 with Tree Risk Assessment Qualification
Trevor Ash, Tree Risk Assessment Qualification See certificate →
Employs a Board Certified Master ArboristNone confirmed
Certificate of insurance on fileNot posted
Valid WSIB clearanceWSIB clearance confirmed
Matched WSIB account: TREVOR ASH / ASH URBAN FORESTRY See certificate →
Transparent pricingNot posted
Verified their own listingNot yet confirmed
Founded in CanadaFounded in Canada
3

Ballantrae Tree Care

Serves Newmarket, Ballantrae, Stouffville, Aurora and Uxbridge and more

4.9 · 77 Google reviewsWSIB clearance not confirmed
Not yet verified by the businessThese details come from our own research. Is this your business? Claim this listing

Specializations

Tree removal (small)Tree removal (large)Tree pruning (small)Tree pruning (large)Hedge trimming (medium and large)Stump grinding (small)Stump grinding (large)Tree planting (small)Tree planting (large)Cabling & bracingFertilizationHydro line clearance24/7 emergency serviceCrane servicesOn-site consultationLegal / bylaw dispute assistanceArborist reportsTree protection plansTree risk assessmentTree appraisalAir excavationPest & disease treatmentLand clearingEducation and advocacyWood chips - UNrefined - LARGE quantityWood chips - Refined - LARGE quantity
Inferred from our research — not yet confirmed by the businessNot inferred — ask directly
Visit websiteFull profile →
4/10LEAF Score

Score breakdown

50+ Google reviews77 Google reviews
5+ years in business6 years in business
Employs a Certified Arborist1 ISA Certified Arborist
Paul Leslie, Certified Arborist See certificate →
Employs a Tree Risk Assessment Qualification holderNone confirmed
Employs a Board Certified Master ArboristNone confirmed
Certificate of insurance on fileNot posted
Valid WSIB clearanceNo WSIB account found under this business name
Transparent pricingNot posted
Verified their own listingNot yet confirmed
Founded in CanadaFounded in Canada

Ties are broken by number of credentials (each Certified Arborist, Board Certified Master Arborist and Tree Risk Assessment Qualification holder counts, so someone with two counts twice), then Google reviews. Ballantrae Tree Care and Timberscapes Tree & Plant Services are tied at 4/10 leaves.

More companies serving Newmarket

4Timberscapes Tree & Plant ServicesGeorgina · 4.9 from 373 reviewsNot verified by businessWSIB confirmed4/105Sequoia TreeScapeNewmarket · 5.0 from 150 reviewsNot verified by businessWSIB confirmed4/106Alexander Tree CareNewmarket · 5.0 from 126 reviewsNot verified by businessWSIB confirmed4/107Green Leaf Tree ServiceCentral Ontario/Cottage Country · 5.0 from 122 reviewsNot verified by businessWSIB confirmed4/108BigLeaf Tree ServiceMarkham · 4.8 from 117 reviewsNot verified by businessWSIB confirmed4/10See all 19 companies serving Newmarket on the map →
A year strip of months showing the dormant season as best for pruning live branches, the spring growth flush as the time to avoid heavy pruning, and dead or hazardous limbs removable any time.
Homeowner question

Does it matter when a tree gets pruned?

If the branches are dead or truly hazardous, then to protect your health and safety, it doesn't matter. Do it any time of the year. For live branches it is best done before the spring growth flush, when wounds close the fastest.

Before you cut

Newmarket’s private tree rules

Permit needed across the city

In Newmarket you need a Town permit to remove a private tree with a trunk 20 cm or wider, measured 1.4 m off the ground. Dead, dying and hazardous trees still need a permit, but there is no fee or replanting.

Whole town

Permit for trees 20 cm and up

Private Tree Protection By-law 2022-10 requires a permit to remove a tree 20 cm or wider. Heritage-designated trees also need approval under the Ontario Heritage Act.

Whole town

Dead, dying and hazardous trees

A permit is still required. Dead or dying trees need no arborist report or fee; hazardous trees need an arborist report but no fee. Neither needs replacement.

Whole town

Replant or pay

For healthy trees, plant a replacement or pay cash-in-lieu: $300 per tree for regular removals, or $450 per 6 cm of trunk not replanted for construction removals.

Town-owned trees

Boulevard trees belong to the Town

Trees on Town land, including boulevards, are cared for by the Town. Contact the Town before any work on or near them.

Woodlots

Woodlots have separate rules

Smaller woodlots fall under Newmarket's Woodlot By-law 2007-71, and larger woodlands under York Region's Forest Conservation By-law. The private tree permit does not apply there.

Anywhere in Ontario

Trees on a property line

A tree whose trunk sits on the line belongs to both neighbours. Ontario’s Forestry Act says you need your neighbour’s consent before removing or injuring it.

Size limits, fees, replacement trees and exemptions
Which trees need a permit
20 cm trunk width, measured 1.4 m off the ground
Permit fee
Administration fee by number of trees: $100 (1 tree), $300 (2–4), $1,000 (5–10), $5,000 (11+), plus $116.50 per tree application review, as published on the Town page (year of fee schedule not stated). No fees for dead, dying or hazardous trees.
Replacement trees
Non-construction: one replacement tree per tree removed or $300 cash-in-lieu per tree. Construction: aggregate inch method or $450 per 6 cm of trunk not replanted. None for dead, dying or hazardous trees.
Common exemptions
  • Trees under 20 cm
  • Trees regulated by the Town Woodlot By-law or York Region Forest Conservation By-law
  • Not-for-profit cemetery work
  • Emergency work on trees posing immediate risk after a storm
  • Fee/replacement waived (permit still required) for dead, dying or hazardous trees

Not sure if you need a permit?

Ask the municipality before any work starts. A good tree company will also check for you and tell you who applies for the permit.

Town of Newmarket

905-895-5193Official information page →

Summary checked September 2026. It’s a plain-language guide, not legal advice. Bylaws change, so confirm with the municipality before you remove a tree.

Sources
The same tree twice. In winter with the leafs off, an arborist sees the branch structure, joints, cracks and dead limbs. With the leafs on, they see leaf health, dieback and pests.
Homeowner question

Should an arborist assess a tree with the leafs on or off?

Both views have their pros and cons. In the winter an arborist can see the overall structure of the tree better. If there are splits in branches, we can see them more clearly. The downside is that sometimes it is a little harder to see which branches are dead or alive.

Bottom line: if you think your tree needs to be assessed, don't let the time of year stop you from reaching out to an arborist.

Before you hire

What to check before you hire a tree service

Tree work is dangerous, and it’s expensive to fix when it goes wrong. Six questions worth asking any company, including the ones on this page.

  1. Ask for a WSIB clearance certificate and proof of liability insurance

    Tree work is one of the most dangerous jobs out there. We do our best on our end, but these certificates can change before we have a chance to update them. Some good companies will give them to you without you even having to ask. Bonus!

  2. Find out who will actually do the work

    You may get a Certified Arborist as your salesperson, but will the same be true of the person who works on your property? You won't know until you ask. A Certified Arborist may cost more, but it can cost a lot more if the work is done wrong and the tree dies early or your property is damaged.

  3. Get the quote in writing

    It should say exactly which trees, and whether cleanup, wood removal, stump grinding and so on are included. The more detailed the quote, the better.

  4. Ask who handles the permit

    If a bylaw applies, agree up front who applies for the permit and who pays the fee. Removing a protected tree without one usually means a fine for the property owner, not the tree company.

  5. If money is tight, try this

    See if the work can be scheduled in a slower season for a lower price. Clear obstacles (fences, gates, lawn ornaments, plants) before the crew arrives. Find someone online, such as on Facebook Marketplace, who will take the wood for free. Or change the scope of work, for example pruning only the lower half of the tree instead of the whole tree.

  6. Trees near power lines are a utility job

    If branches touch or come close to a hydro line, call your local hydro utility (the one on your electricity bill) first. Only crews the utility approves can work near power lines.

A year strip of months. Late summer to early fall is the best time to plant, spring is acceptable with a little more risk, and midsummer planting is the greatest risk because the tree may not be watered.
Homeowner question

When is the best time to plant a tree?

The goal is usually to give the tree as much time to establish as possible before summer drought. Therefore, late summer to early fall is the best time of year. Spring is acceptable as well; it just carries a little more risk. Summer planting is the greatest risk to the tree, in part because many Ontarians vacation and the tree may not get watered while they are away.

Tree services near Newmarket

AuroraRichmond HillVaughanMarkhamPickeringCaledon

LEAF Scores reflect public records and research on the date checked. Always confirm insurance, certification and WSIB coverage directly with a company before you hire it.