About Tree Service Denver LLC — ISA Member Arborists Since 2011
Family-owned and ISA-member since 2011. Every job led by an ISA member arborist. Every cut follows ANSI A300 standards. $1M insured, 5.0-star rated across 160+ verified reviews.
Who Is Tree Service Denver LLC?
Tree Service Denver LLC is an ISA member arborist company founded in 2011 and led by arborist Eric Petruska, serving Denver and 20 surrounding metro cities. We provide tree removal, trimming and pruning, stump grinding, tree health care, wildfire mitigation, and 24/7 emergency service — every job backed by $1M liability insurance, ANSI A300 standards, a zero-damage guarantee, and a 5.0-star record across 164 Google reviews.
Why Tree Service Denver LLC Was Founded
Tree Service Denver LLC was founded on a single non-negotiable principle: every tree job in Denver deserves an ISA member arborist on-site — not just a crew with a chainsaw. Lead arborist Eric Petruska spent a decade in Denver’s tree care industry and watched too many homeowners pay for improper pruning cuts, illegal topping, and unsafe removal practices from unlicensed crews. In Colorado, there is no state licensing requirement for tree services — meaning anyone can call themselves a tree company with zero training or insurance.
Tree Service Denver LLC was built as the alternative: a company where every job is led by an ISA member arborist, every crew carries $1M in liability insurance and workers’ compensation, and every cut follows ANSI A300 industry standards. Since 2011, we have completed thousands of jobs across the Denver Metro — from routine crown cleaning to emergency storm response — and maintained a 5.0-star average across every review platform.
We are based in Denver, Colorado and serve all cities in the Denver Metro Area. We welcome any homeowner to verify our ISA membership at the ISA at isa-arbor.com.
Tree Service Denver LLC Standards
- ✓ ISA Member Arborist credential on every job site
- ✓ $1M general liability + workers’ compensation
- ✓ ANSI A300 pruning and removal standards on all work
- ✓ OSHA-compliant aerial and ground operations
- ✓ Proper rigging, notch-cutting, and directional felling
- ✓ Knowledge of Colorado native species and Front Range conditions
Eric Petruska — Lead ISA Member Arborist & Owner
Eric founded Tree Service Denver LLC after 10 years in Denver arboriculture and serves as the lead arborist on all complex removals, large tree pruning, and commercial contracts. His specialties include tree risk assessment, hazard removal, emergency storm response, and stump grinding across the Front Range.
Eric answers every estimate call personally. When you call (720) 807-2785, you are speaking directly with the ISA member arborist who will assess and oversee your job — not a dispatcher or salesperson.
Specialties: Tree risk assessment · Large-scale pruning · Hazard tree removal · Emergency storm response · Stump grinding · ISA Best Management Practices
What ISA Membership Means for Your Trees
The International Society of Arboriculture (ISA) is the industry body that publishes the research, safety standards and Best Management Practices the tree care profession works from. As ISA members we work to those published standards — including ANSI A300, the national standard for tree care operations.
In Colorado, there is no state licensing requirement for tree services — any person can advertise as a “tree company” without training, certification, or insurance. That makes it worth asking any Denver tree company what standards they work to, what insurance they carry, and whether they will put an estimate in writing.
❌ Unlicensed Crews (Common in Denver)
- No certification or training required
- May use improper cuts that cause long-term damage
- No liability insurance — you bear the risk
- No workers’ comp — injury liability falls on homeowner
- No continuing education requirement
✓ Tree Service Denver LLC
- ISA member arborist on every job site
- ANSI A300 standards on every cut
- $1M general liability insurance — COI available
- Workers’ comp covers every crew member
- ISA member — follows ISA Best Management Practices
Ask us for our certificate of insurance and our ISA membership details before any work begins — we provide both on request.
Tree Services Across the Denver Metro
🌳 Tree Removal
Safe, insured removal of any size tree. Zero-damage rigging near structures.
Tree removal services →✂ Tree Trimming
Crown cleaning, deadwooding, and structural pruning per ANSI A300.
Tree trimming & pruning →🪓 Stump Grinding
Complete stump removal below grade. Same-day service available.
Stump grinding services →⚡ Emergency Service
24/7 dispatch for active hazards, storm damage, and fallen trees.
Emergency tree service →🌍 Deep Root Fertilization
Corrects iron chlorosis and drought stress on Front Range trees.
Deep root fertilization →What Actually Makes Us Different
Every tree company says “licensed and insured.” Here’s what’s verifiable about us: the assessment on every job is done by a named, publicly verifiable ISA member arborist, not a commissioned estimator; our credentials and insurance are documented and checkable; our six-step process is published so you know exactly what happens and when; and our 164 reviews repeatedly mention the same three things — honesty about whether trees need work, careful rigging around property, and complete cleanup. We built the company for the long game in one metro area, which means every job has to protect a 15-year local reputation.
More Questions, Answered
How long has Tree Service Denver LLC been in business?
Are you locally owned?
What areas do you cover?
What services do you offer?
Are you insured?
From 2011 to Today
Tree Service Denver LLC started in 2011 with one truck and one conviction: Denver homeowners deserved tree work done by someone who actually understood trees. Fifteen years later the equipment list is longer but the model hasn’t changed — one metro area, arborist-led assessments on every job, and a reputation built one yard at a time. Along the way the Front Range’s tree challenges have kept evolving: emerald ash borer reaching Denver’s ash canopy, deepening drought cycles stressing mature trees, and wildfire risk pushing defensible-space work from the foothills into the suburbs. We’ve built expertise in each because our customers needed it — that’s the whole growth strategy.
Rooted in the Denver Metro — Literally
Working one metro for fifteen years builds a kind of knowledge no franchise playbook contains: which neighborhoods’ silver maples are reaching end-of-life, where the 1970s ash plantings are (and how fast EAB is finding them), which foothill streets get the destructive upslope snows, and what actually thrives in our alkaline soil and 5,280-foot sun. It also builds accountability you can’t fake: our crews live here, our reviews come from neighbors, and a bad job would follow us to the grocery store. We think that’s exactly how a trade business should work — and it’s why we’ve never needed to chase work outside the metro. The trees here are enough of a career for anyone who takes them seriously.
The Company at a Glance
- Founded: 2011, Denver, Colorado
- Led by: ISA Member Arborist Eric Petruska
- Insurance: $1M general liability + workers’ compensation
- Rating: 5.0 stars across 164 Google reviews
- Coverage: Denver + 20+ metro-area communities, 24/7 emergency response
Everything else on this page is detail; those five lines are the company. Verify any of them — the credential, the insurance, the reviews — and then let the work speak on your own trees.
Get a Free Estimate from Eric
ISA-member. $1M insured. Same-day response. Written quote, no obligation.
ISA-Member • $1M Insured • 5.0 ★ Google • Denver Metro Since 2011
