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Mortensen Tree Service

Tree Service, Lawn Fertilization & Treatment

About us

My name is Mark Mortensen. I am an ISA Certified Arborist (RM-1002A). I prune, remove and nurture trees. I offer personalized service from our initial phone conversation, performing the evaluation and then fullfilling the work.

Business highlights

30 years of trusted experience
Emergency Services Offered

Services we offer

Large and small tree pruning and removal. Stump grinding. Nurturing your trees and landscape with a totally non-toxic (labeled as organic in 14 states) line of products EnviroTree, EnviroYard and BTN+. We also offer and install Yard Feeder fertigation systems.

Services we don't offer

Shearing shrubs, lawn mowing, sprinkler or irrigation installation.

Amenities

Warranties
Yes
Emergency Services
Yes


Accepted payment methods

American Express
Check
Discover
MasterCard
Visa

Reviews

4.922 Reviews
Number of StarsImage of DistributionNumber of Ratings
5
91%
4
0%
3
5%
2
0%
1
5%


Rating CategoryRating out of 5
quality
4.9
value
4.6
professionalism
4.8
responsiveness
4.9
punctuality
4.9
Showing 1-22 of 22 reviews

Bette R.
07/2018
5.0
tree service
  + -1 more
Ash, locust, and pine trees look so much better with dead wood removed and pruned where needed.
Description of Work: Tree trimming

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$850

Jennifer S.
06/2017
5.0
tree service
  + -1 more
Mark Mortensen was great! My tree did not fair well with the massive heavy snow on April 28-29th. A huge portion had collapsed in the street and two other parts were threatening to fall both on my house and my driveway (not a pretty sight). My excellent neighbor had done some research on tree removal and gave me Mark's name as someone he might use for removing a tree. I am so glad my neighbor did the homework, because it helped me a lot. I called Mark and he came out during the storm (I would like to emphasize: during the storm!) and took a look at my tree. He understood my urgency to get the huge tree limb out of the street and carefully remove the limb threatening to crash into the house (this part was tricky for other reasons, too). He scheduled me in right away (I must have been one of the worst he had seen yet for this storm) and removed the tree on Monday, May 1st. He cut it low, removed everything, and it was done and cleaned up before I got home. I was (I am still) very grateful for the fast service and I would highly recommend him, especially if everything seems to all be going wrong!
Description of Work: Removing a storm damaged tree before more of it collapsed.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$1,500

Sara M.
05/2017
3.0
tree service
  + -1 more
When he deferred our project once due "to a storm" and the justification that our house wasn't threatened by downed branches and we could wait. I was gracious, but should have taken the hint and hired someone else. He didn't need or want the business. After several weeks of not hearing from him, I finally called and asked if he was going to do our job or not since we were running out of time with other contractors waiting on him. I asked if we could schedule a date for the work, which he declined since does not allow scheduling. He showed up the next day with 30 min notice instead. 2 of the trees went very well, however Mr. Mortenson oversold his capabilities when he bid our project and assured me that even though he doesn't do stump grinding our third tree wouldn't be a problem, he could get the stump low enough that we wouldn't need to and our landscapers could still build our design. So, after they finished the third stump was 15" above the ground... not even CLOSE to what we had discussed. I politely asked if that was as low as he could get it because it would not work for the design we had discussed when he bid the project and he lost his temper instead of answering me. I was trying to give him the benefit of the doubt that maybe he ran into something he hadn't anticipated or got in over his head and that's why he left it so tall. However, he provided no explanation. I asked him if in his professional experience what options we might have to reduce it further (swallowing my pride and accepting that by hiring him we just ended with several hundred dollars in overrun in this project now). Could we burn it out? Grind it out? He responded by just telling me to learn to live with it and put a pot on it because that's what he would do. I asked again how could we make this work and still get the design we wanted. (As an "arborist", I assumed he might know of something) His answer "You don't. What you wanted was stupid anyway" Took my check and walked away. We had several bids for our job and we hired Mortenson because we believed that Mark was knowledgeable and professional even though he wasn't the cheapest. What we got was neither. His comments left me feeling like he knew he couldn't do the job from the beginning and took us for a ride for some easy cash. Both my husband and I regret hiring him. Things to know about Mortenson Tree: 1. Doesn't need your business, he has plenty already so don't expect to be treated like he values it 2. Doesn't allow scheduling in advance. Its on an on call basis only and he'll get to it when he does. 3. Does not do stump grinding - the advertisement is incorrect 4. While he may be a certified arborist he does not have the time or desire to share his expertise with you even when you are paying him.
Description of Work: Remove 3 trees in preparation for landscape crews

Rating CategoryRating out of 5
quality
3.0
value
4.0
professionalism
2.0
responsiveness
4.0
punctuality
4.0

$1,000

Jim K.
03/2017
5.0
tree service
  + -1 more
great job, punctual, trees look much better
Description of Work: Trimed and cleaned up large spruce, large pinon and apple tree

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$750

John L.
08/2016
5.0
tree service
  + -1 more
After arriving on time, even though it was a late Saturday afternoon. Mr. Mortensen assessed as to the health and possible removal of my tree. His advice was to neither prune nor remove the tree just yet. The risk of the tree falling over was low so we could keep it for the summer/fall season as it provides privacy. Also, this could give us more time to decide if we want to have the whole tree removed. He did caution us that the longer we wait the longer it would cost to remove the tree. I appreciated Mr. Mortensen's honest assessment, even if it meant he would not have a tree removal job. When I am ready to have the tree removed, whether tomorrow or in the fall, I will call Mr. Mortensen first.
Description of Work: Mr. Mortensen came to my house to assess the whether my damaged tree needed to be remove or pruned.

Rating CategoryRating out of 5
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Todd B.
08/2016
5.0
tree service
  + -1 more
I spoke with several tree services in my area and had recommendations from several co-workers. In the end I went with Mortensen Tree Service. Mark was knowledgeable, courteous, on time and professional. He not only came out to bid the job but ran the job the day of service. This is not always the case with other companies. I plan on having Mark back out this winter to trim my apple trees.
Description of Work: I had 8 large trees that needed pruning and 1 that needed to be removed.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$4,000

Ammar A.
08/2016
1.0
tree service
  + -1 more
N/A
Description of Work: I called to have someone come out to look at my tree that needed care. Mort didn't know what he was talking about and proceeded to tell me, "well I'll pass". Pass on what, the business. He obviously didn't want to deal with me and doesn't want the business or isn't passionate enough about trees to help. Very disappointing and would never recommend Mortensen Tree Services. Just a jerk!!!

Rating CategoryRating out of 5
professionalism
1.0
responsiveness
1.0


Charles M.
04/2016
5.0
tree service
  + -1 more
unknown
Description of Work: Mark did an excellent job removing 2 apple trees and trimming up the rest of the trees in our yard. He worked fast and the trees look great.
Rating CategoryRating out of 5
Yes, I recommend this pro

Leslie F.
03/2016
5.0
tree service
  + -1 more
I had several “middle-aged” trees needing serious attention: crabapple that had never been pruned, maples blocking walks and w/peeling bark from last year’s heavy spring snow, aspens needing to be cut down. Went onto Angies List and BBB to find tree services that were available in my area. From studying these providers it seemed to me that a single owner business with quality horticultural experience over many years would be a good fit. I called approximately 6 tree services and Mark Mortensen of Mortensen Tree Service, Inc. was the first, by over a day, to call to make an appointment even though it is a very busy time of year for this kind of business. He came to my home 2 days later. I expected a quick run around the yard, but Mark took close to an hour reviewing his qualifications and experience: horticultural and arborist certificates, business awards, and an extensive portfolio of his wok from extremely large jobs to small like mine. We walked my yard thoroughly and I was impressed with his approach of treating trees almost artistically: how they would grow in future years, which trees should have structured shapes, which should have an organic, flowing shape, etc... When he was finished my trees looked precisely as we discussed, none had been treated harshly, no surrounding areas had been damaged and all wood from the fallen aspens was removed, except a little for my summer fire pit. In fact, Mark was very kind and fertilized my trees without charge! I have asked Mark to return next year to deal with yet more aspens and I absolutely recommend him for his excellent work with and knowledge of all things trees. Thanks Mark.
Description of Work: Tree pruning, removing dead trees, recommendations for future planting.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$800

Greg G.
03/2016
5.0
tree service
  + -1 more
We bought our house last summer from a family that hadn't taken care of the trees on the lot in at least 7 years. Mark came out personally and did a risk assessment of all the trees and made recommendations of which ones needed attention in order of priority. Mark spent time showing me his certifications, continuing education, insurance, and awards, as well as pictures of some of his past jobs. Hopefully he took pictures of ours because they look great! As a first-time user of a certified arborist, I was a little surprised at the cost involved, but we are very happy with Mark's work and wouldn't hesitate to hire him again. In fact, we plan on using him again as soon as we can get him back out to the house - he is a busy guy.
Description of Work: Pruned 3 mature Plains Cottonwoods trees in our backyard.

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$1,350

Jebediah B.
10/2015
5.0
tree service
  + -1 more
I had initially contacted Mortensen Tree Service to see about having an old silver maple in the front yard of the house that I had just bought trimmed. The tree had a lot of dead branches as it had not been kept up by the previous owners of the house, and given that it was one of the selling points of the house for me and my wife, we wanted it to look nice. Mark showed up promptly for the service consultation, gave a brief and enlightening description of his background, and then found out what I wanted done. Unfortunately Mark then gave me the bad news. The maple would have to be removed. He was forthright about it, that indeed I could just trim it like I wanted, but that in a year, maybe two at the outmost, I would be having it removed anyways. He pointed out all the signs of extreme rotting in the tree. Discolored leaves, hollow holes, slumping limbs, and explained that the maple we liked so much are prone to rotting from the inside out. He advised that given how the tree was situated, it would be much better to have it taken down now, than to wait for a storm, or a heavy snow to drop a limb on my, or my neighbor's house. He was very reluctant, as in he was outright not going to do it, to "just trim" a tree that he obviously felt was a danger, though I pressed him a bit on it. Mark is definitely a man of principal. After getting a quote for the removal, I contacted a few other tree services, and their guys came over, and told me much the same, after hemming and hawing, and asking if I was sure I just didn't want to get it trimmed for now. So I had Mark take down the tree. He had to get a crane truck to do the whole job, but showed up while I was at work, and was done by the time I got home mid-afternoon of the scheduled day. Other than some sawdust around the remaining stump (I didn't have him grind it as money was a bit tight from the house purchase, but his quote for that was very competitive as well), and a few stray small branches and bits of bark the whole tree was gone. No mess left behind, and without the fact that the tree wasn't in the yard anymore, nary a sign he had been there. I grew up in a small town, and Mark's whole business reminded me of businesses there, not something I often see in the city. Mark obviously takes pride in what he does, and he is going to do it the way he believes is right way, even if it means you might go somewhere else because you don't agree with him.
Description of Work: I ended up having to have a tree removed.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$1,500

Jill D.
01/2015
5.0
tree service
  + -1 more
Professional and knowledgeable service. I was pleased with the final product.
Description of Work: Trimmed two trees in my front yard.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$500

NANCY C G.
07/2014
5.0
tree service
  + -1 more
Had purchased one of the Big Deal coupons and applied it to cost of service. Mark got in touch very quickly and arranged to do the work within a few weeks. He and Andy came out about 8 am and were all finished by early afternoon. They worked quietly and steadily and knew exactly what they were doing. They also gave some excellent advice on our landscape. We were very pleased and would not hesitate to call them for any other work needed.
Description of Work: Cut down and removed three dead/dying aspens; pruned and shaped a large locust that had a lot of dead wood in it; checked condition on several other mature trees.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$1,200

Tracy A.
01/2014
5.0
tree service
  + -1 more
I bought a Big Deal coupon ($99 for $200 of service) and then paid for additional tree trimming without getting any other estimates which means I don't know if Mortensen's rate is good or not. Mark and his crew were friendly and professional, and did what they said they'd do. Note: They cut down a sickly ash tree because of possible borer threat, but never let me know whether they'd detected the borer or not so I highly recommend staying on top of those kinds of issues. Overall, an excellent experience.
Description of Work: .

Rating CategoryRating out of 5
quality
5.0
professionalism
5.0
responsiveness
4.0
punctuality
5.0

Yes, I recommend this pro
$2,050

Response from Mortensen Tree Service
" I don't know if Mortensen's rate is good or not". Mortensen Tree tries to offer prices that are fair - both for our clients and our company. We never intend to be the lowest price or the highest price but somewhere in the middle. "Note: They cut down a sickly ash tree because of possible borer threat, but never let me know whether they'd detected the borer or not..." Mortensen Tree did not suspect or detect Emerald Ash Borer at the time of the initial evaluation. If we did, there would have been quite a few entities notified immediately. We are of the opinion that the tree declined due to to environmental stress and was approximately 75% dead or dying and that is the reason we recommended removal. Questions and concerns about Emerald Ash Borer (EAB) are becoming very common as this very significant and destructive pest has now been confirmed in Colorado. Protocol is being developed by several agencies and entities that Mortensen Tree will abide by if we suspect or detect EAB. We have been on the"look out" for this pest for quite some time. Ash Bark Beetle (a different pest) was present but not necessarily the cause of the trees decline but they certainly hastened it. During my initial evaluation, I offered several suggestions that could be implemented to improve the health of your other trees and landscape in general. We thank you for your comments and review. We always make every attempt to be very responsive and answer all questions in a timely manner. I had set aside some branches to show you the evidence of the Ash Bark Beetle but as you had a fairly demanding schedule the day we worked, time did not allow for a short course on entomology. The fact that Emerald Ash Borer was not detected kind of negated a call for alarm and further distraction from your busy day. The effected tree was removed and kind of ended the problem. Please let me know if you would like further information on this subject and I will be happy to expand on it either by email or over the telephone. Mark Mortensen, ISA Certified Arborist #RM-1002A

Janet W.
12/2013
5.0
tree service
  + -1 more
It went well.
Description of Work: Remove huge pine tree.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$3,000

Robert F.
12/2013
5.0
tree service
  + -1 more
Great service and expert knowledge
Description of Work: i used MORTENSEN TREE SERVICE

Rating CategoryRating out of 5
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$800

Jeanne C.
12/2013
5.0
tree service
  + -1 more
unknown
Description of Work: Pruned our honey locust...Very knowledgeable and professional!
Rating CategoryRating out of 5
Yes, I recommend this pro

Debra G.
11/2013
5.0
tree service
  + -1 more
It went well. They know what they are doing and they made my trees look great.
Description of Work: Trimmed several trees

Rating CategoryRating out of 5
quality
5.0
value
4.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$1,500

Michelle D.
10/2013
5.0
tree service
  + -1 more
Over-the-top satisfied! Not only with the job of cutting down and removing the two dead aspens, but the actual care and concern for each and every detail. The knowledge, history and true care that went into this job was admirable. Never experienced someone who took more care, yet did such a quick and thorough job as this company. I would say BRAVO on ALL counts...!
Description of Work: Cut down and removed two dead aspens

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Matt W.
09/2012
5.0
tree service
  + -1 more
Mark did an awesome job pruning my Ash tree. I was getting ready to sell my house but the Ash tree out front was overgrown and had broken branches from the last winter snows. It's a beautiful tree but was starting to hide the house. Plus the entire back side had some huge branches come down in the winter. It was not looking quite as good as it had in prior years. Mark came out gave us a fair estimate and scheduled the work. The work was done on time and in a very professional manner. He really knows what he's doing! Mark did an awesome job and I was amazed at how good the tree looked.
Description of Work: Tree pruning for a very large Ash tree in the front yard.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$400

Giovanni S.
10/2011
5.0
tree service
  + -1 more
unknown
Description of Work: Mark is one of the most talented contractors that I have ever had the pleasure working with. He took the time to walk us through the process, and to explain his whole philosophy on shaping trees. He came highly reccomended from a family member, and we had no idea that he was the ISA arborist of the year. We have called him on multiple occasions, he has always been very responsive, and his work is amazing. Clean up is thourough, and he has been able to save a few trees that I thought were toast. Additionally he has a great reputation among arborists and he has a great relationship with the Denver urban forester

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro

Amber W.
11/2005
5.0
tree service
  + -1 more
Mortensen's did a really great job. They removed a very large maple tree and also the two stumps for a great price. I would highly recommend them to anyone in the area looking to remove trees and stumps.
Description of Work: I had to take down a very tall maple tree in my backyard. I also had to remove two large stumps.

Rating CategoryRating out of 5
quality
5.0
value
5.0
professionalism
5.0
responsiveness
5.0
punctuality
5.0

Yes, I recommend this pro
$750

    Contact information

    990 E Cottonwood Ave, Littleton, CO 80121

    www.mortensentree.com

    Service hours

    Sunday:
    6:00 AM - 8:00 PM
    Monday:
    6:00 AM - 8:00 PM
    Tuesday:
    6:00 AM - 8:00 PM
    Wednesday:
    6:00 AM - 8:00 PM
    Thursday:
    6:00 AM - 8:00 PM
    Friday:
    6:00 AM - 8:00 PM
    Saturday:
    6:00 AM - 8:00 PM

    Licensing

    Insured

    Eco-friendly Accreditations

    LEED Accredited Professional
    No
    Energy Star Partner
    No
    EPA Lead-Safe Certified
    No
    Use Green Products or Work Practices
    Yes
    State Contractor License Requirements

    All statements concerning insurance, licenses, and bonds are informational only, and are self-reported. Since insurance, licenses and bonds can expire and can be cancelled, homeowners should always check such information for themselves. To find more licensing information for your state, visit our State Contractor License Requirements page.

    *Contact business to see additional licenses.


    Service Categories

    Tree Service,
    Lawn Fertilization & Treatment

    FAQ

    Mortensen Tree Service is currently rated 4.9 overall out of 5.

    Sunday: 6:00 AM - 8:00 PM

    Monday: 6:00 AM - 8:00 PM

    Tuesday: 6:00 AM - 8:00 PM

    Wednesday: 6:00 AM - 8:00 PM

    Thursday: 6:00 AM - 8:00 PM

    Friday: 6:00 AM - 8:00 PM

    Saturday: 6:00 AM - 8:00 PM

    Mortensen Tree Service accepts the following forms of payment: American Express,Check,Discover,MasterCard,Visa
    No, Mortensen Tree Service does not offer free project estimates.
    Yes, Mortensen Tree Service offers eco-friendly accreditations.
    No, Mortensen Tree Service does not offer a senior discount.
    Yes, Mortensen Tree Service offers emergency services.
    Yes, Mortensen Tree Service offers warranties.
    Mortensen Tree Service offers the following services: Large and small tree pruning and removal. Stump grinding. Nurturing your trees and landscape with a totally non-toxic (labeled as organic in 14 states) line of products EnviroTree, EnviroYard and BTN+. We also offer and install Yard Feeder fertigation systems.
    Shearing shrubs, lawn mowing, sprinkler or irrigation installation.

    Contact information

    990 E Cottonwood Ave, Littleton, CO 80121

    www.mortensentree.com

    Service hours

    Sunday:
    6:00 AM - 8:00 PM
    Monday:
    6:00 AM - 8:00 PM
    Tuesday:
    6:00 AM - 8:00 PM
    Wednesday:
    6:00 AM - 8:00 PM
    Thursday:
    6:00 AM - 8:00 PM
    Friday:
    6:00 AM - 8:00 PM
    Saturday:
    6:00 AM - 8:00 PM